Seasonal Forecast API
Provides seasonal outlooks up to 9 months ahead using the ECMWF SEAS5 model, offering monthly aggregates of temperature and precipitation anomalies for long-range planning and agricultural applications.
OpenAPI Specification
openapi: '3.0.3'
info:
title: Open-Meteo Seasonal Weather Forecast API
description: >-
Seasonal weather forecasts based on ECMWF SEAS5 and other ensemble models providing probabilistic long-range forecasts up to 9 months ahead.
version: '1.0'
contact:
name: Open-Meteo
url: https://open-meteo.com
email: [email protected]
license:
name: Attribution 4.0 International (CC BY 4.0)
url: https://creativecommons.org/licenses/by/4.0/
termsOfService: https://open-meteo.com/en/features#terms
paths:
/v1/seasonal:
servers:
- url: https://seasonal-api.open-meteo.com
- url: https://customer-seasonal-api.open-meteo.com
get:
tags:
- Seasonal Forecast APIs
summary: Seasonal weather forecast up to 9 months
description: >-
Long-range seasonal forecasts from multiple ensemble models with 6-hourly and daily data.
parameters:
- name: latitude
in: query
required: true
schema:
type: string
- name: longitude
in: query
required: true
schema:
type: string
- name: hourly
in: query
description: >-
A list of weather variables (6-hourly resolution).
explode: false
schema:
type: array
items:
type: string
enum:
- temperature_2m
- dew_point_2m
- pressure_msl
- sea_surface_temperature
- snowfall_water_equivalent
- precipitation
- soil_temperature_0_to_7cm
- cloud_cover
- wind_speed_10m
- wind_speed_100m
- wind_speed_200m
- wind_direction_10m
- wind_direction_100m
- wind_direction_200m
- wind_gusts_10m
- rain
- showers
- snowfall
- relative_humidity_2m
- apparent_temperature
- et0_fao_evapotranspiration
- vapour_pressure_deficit
- weather_code
- sunshine_duration
- wave_height
- wave_direction
- wave_period
- wave_peak_period
- soil_temperature_7_to_28cm
- soil_temperature_28_to_100cm
- soil_temperature_100_to_255cm
- soil_moisture_0_to_7cm
- soil_moisture_7_to_28cm
- soil_moisture_28_to_100cm
- soil_moisture_100_to_255cm
- shortwave_radiation
- direct_radiation
- diffuse_radiation
- direct_normal_irradiance
- global_tilted_irradiance
- terrestrial_radiation
- shortwave_radiation_instant
- direct_radiation_instant
- diffuse_radiation_instant
- direct_normal_irradiance_instant
- global_tilted_irradiance_instant
- terrestrial_radiation_instant
- name: daily
in: query
description: >-
A list of daily weather variables.
explode: false
schema:
type: array
items:
type: string
enum:
- sunrise
- sunset
- weather_code
- et0_fao_evapotranspiration
- vapour_pressure_deficit_max
- temperature_2m_max
- temperature_2m_min
- temperature_2m_mean
- sunshine_duration
- dew_point_2m_mean
- pressure_msl_mean
- sea_surface_temperature_mean
- cloud_cover_mean
- wind_speed_10m_mean
- wind_speed_100m_mean
- snow_depth_mean
- soil_temperature_0_to_7cm_mean
- name: weekly
in: query
description: >-
A list of weekly weather variables.
explode: false
schema:
type: array
items:
type: string
enum:
- wind_speed_10m_mean
- wind_speed_10m_anomaly
- wind_speed_100m_mean
- wind_speed_100m_anomaly
- wind_direction_10m_mean
- wind_direction_10m_anomaly
- wind_direction_100m_mean
- wind_direction_100m_anomaly
- snow_depth_mean
- snow_depth_anomaly
- snowfall_mean
- snowfall_anomaly
- temperature_2m_anomaly_gt0
- temperature_2m_anomaly_gt1
- temperature_2m_anomaly_gt2
- temperature_2m_anomaly_ltm1
- temperature_2m_anomaly_ltm2
- pressure_msl_anomaly_gt0
- surface_temperature_anomaly_gt0
- precipitation_anomaly_gt0
- precipitation_anomaly_gt10
- precipitation_anomaly_gt20
- temperature_2m_sot10
- temperature_2m_sot90
- temperature_2m_efi
- precipitation_efi
- precipitation_sot90
- showers_mean
- snow_density_mean
- snow_density_anomaly
- snow_depth_water_equivalent_mean
- snow_depth_water_equivalent_anomaly
- total_column_integrated_water_vapour_mean
- total_column_integrated_water_vapour_anomaly
- temperature_2m_mean
- temperature_2m_anomaly
- dew_point_2m_mean
- dew_point_2m_anomaly
- pressure_msl_mean
- pressure_msl_anomaly
- sea_surface_temperature_mean
- sea_surface_temperature_anomaly
- wind_u_component_10m_mean
- wind_u_component_10m_anomaly
- wind_v_component_10m_mean
- wind_v_component_10m_anomaly
- wind_u_component_100m_mean
- wind_u_component_100m_anomaly
- wind_v_component_100m_mean
- wind_v_component_100m_anomaly
- snowfall_water_equivalent_mean
- snowfall_water_equivalent_anomaly
- precipitation_mean
- precipitation_anomaly
- cloud_cover_mean
- cloud_cover_anomaly
- sunshine_duration_mean
- sunshine_duration_anomaly
- soil_temperature_0_to_7cm_mean
- soil_temperature_0_to_7cm_anomaly
- temperature_max6h_2m_mean
- temperature_max6h_2m_anomaly
- temperature_min6h_2m_mean
- temperature_min6h_2m_anomaly
- name: monthly
in: query
description: >-
A list of monthly weather variables.
explode: false
schema:
type: array
items:
type: string
enum:
- wind_gusts_10m_anomaly
- wind_speed_10m_mean
- wind_speed_10m_anomaly
- albedo_mean
- albedo_anomaly
- cloud_cover_low_mean
- cloud_cover_low_anomaly
- showers_mean
- showers_anomaly
- runoff_mean
- runoff_anomaly
- snow_density_mean
- snow_density_anomaly
- snow_depth_water_equivalent_mean
- snow_depth_water_equivalent_anomaly
- total_column_integrated_water_vapour_mean
- total_column_integrated_water_vapour_anomaly
- temperature_2m_mean
- temperature_2m_anomaly
- dew_point_2m_mean
- dew_point_2m_anomaly
- pressure_msl_mean
- pressure_msl_anomaly
- sea_surface_temperature_mean
- sea_surface_temperature_anomaly
- wind_u_component_10m_mean
- wind_u_component_10m_anomaly
- wind_v_component_10m_mean
- wind_v_component_10m_anomaly
- snowfall_water_equivalent_mean
- snowfall_water_equivalent_anomaly
- precipitation_mean
- precipitation_anomaly
- shortwave_radiation_mean
- shortwave_radiation_anomaly
- longwave_radiation_mean
- longwave_radiation_anomaly
- cloud_cover_mean
- cloud_cover_anomaly
- sunshine_duration_mean
- sunshine_duration_anomaly
- soil_temperature_0_to_7cm_mean
- soil_temperature_0_to_7cm_anomaly
- soil_temperature_7_to_28cm_mean
- soil_temperature_7_to_28cm_anomaly
- soil_temperature_28_to_100cm_mean
- soil_temperature_28_to_100cm_anomaly
- soil_temperature_100_to_255cm_mean
- soil_temperature_100_to_255cm_anomaly
- soil_moisture_0_to_7cm_mean
- soil_moisture_0_to_7cm_anomaly
- soil_moisture_7_to_28cm_mean
- soil_moisture_7_to_28cm_anomaly
- soil_moisture_28_to_100cm_mean
- soil_moisture_28_to_100cm_anomaly
- soil_moisture_100_to_255cm_mean
- soil_moisture_100_to_255cm_anomaly
- temperature_max24h_2m_mean
- temperature_max24h_2m_anomaly
- temperature_min24h_2m_mean
- temperature_min24h_2m_anomaly
- sea_ice_cover_mean
- sea_ice_cover_anomaly
- latent_heat_flux_mean
- latent_heat_flux_anomaly
- sensible_heat_flux_mean
- sensible_heat_flux_anomaly
- evapotranspiration_mean
- evapotranspiration_anomaly
- snowfall_mean
- snowfall_anomaly
- snow_depth_mean
- snow_depth_anomaly
- name: temperature_unit
in: query
schema:
type: string
default: celsius
enum: [celsius, fahrenheit]
- name: wind_speed_unit
in: query
schema:
type: string
default: kmh
enum: [kmh, ms, mph, kn]
- name: precipitation_unit
in: query
schema:
type: string
default: mm
enum: [mm, inch]
- name: timeformat
in: query
schema:
type: string
default: iso8601
enum: [iso8601, unixtime]
- name: timezone
in: query
schema:
type: string
- name: past_days
in: query
schema:
type: integer
default: 0
minimum: 0
maximum: 92
- name: forecast_days
in: query
description: >-
Number of forecast days. Up to 217 days (7 months).
schema:
type: integer
default: 183
minimum: 0
maximum: 217
- name: start_date
in: query
description: >-
Start date in ISO 8601 format.
schema:
type: string
format: date
- name: end_date
in: query
description: >-
End date in ISO 8601 format.
schema:
type: string
format: date
- name: cell_selection
in: query
schema:
type: string
enum: [land, sea, nearest]
- name: models
in: query
description: Manually select one or more weather models.
explode: false
schema:
type: array
items:
type: string
enum:
- best_match
- ecmwf_seasonal_seamless
- ecmwf_seas5
- ecmwf_ec46
- ecmwf_seasonal_ensemble_mean_seamless
- ecmwf_seas5_ensemble_mean
- ecmwf_ec46_ensemble_mean
- name: apikey
in: query
description: >-
Only required for commercial subscriptions.
schema:
type: string
responses:
'200':
description: OK
content:
application/json:
schema:
type: object
properties:
latitude:
type: number
format: float
longitude:
type: number
format: float
elevation:
type: number
format: float
generationtime_ms:
type: number
format: float
utc_offset_seconds:
type: integer
timezone:
type: string
timezone_abbreviation:
type: string
hourly:
type: object
properties:
time:
type: array
items:
type: string
additionalProperties:
type: array
items:
type: number
format: float
hourly_units:
type: object
properties:
time:
type: string
additionalProperties:
type: string
daily:
type: object
properties:
time:
type: array
items:
type: string
additionalProperties:
type: array
items:
type: number
format: float
daily_units:
type: object
properties:
time:
type: string
additionalProperties:
type: string
weekly:
type: object
properties:
time:
type: array
items:
type: string
wind_speed_10m_mean:
type: array
items:
type: number
format: float
wind_speed_10m_anomaly:
type: array
items:
type: number
format: float
wind_speed_100m_mean:
type: array
items:
type: number
format: float
wind_speed_100m_anomaly:
type: array
items:
type: number
format: float
wind_direction_10m_mean:
type: array
items:
type: number
format: float
wind_direction_10m_anomaly:
type: array
items:
type: number
format: float
wind_direction_100m_mean:
type: array
items:
type: number
format: float
wind_direction_100m_anomaly:
type: array
items:
type: number
format: float
snow_depth_mean:
type: array
items:
type: number
format: float
snow_depth_anomaly:
type: array
items:
type: number
format: float
snowfall_mean:
type: array
items:
type: number
format: float
snowfall_anomaly:
type: array
items:
type: number
format: float
temperature_2m_anomaly_gt0:
type: array
items:
type: number
format: float
temperature_2m_anomaly_gt1:
type: array
items:
type: number
format: float
temperature_2m_anomaly_gt2:
type: array
items:
type: number
format: float
temperature_2m_anomaly_ltm1:
type: array
items:
type: number
format: float
temperature_2m_anomaly_ltm2:
type: array
items:
type: number
format: float
pressure_msl_anomaly_gt0:
type: array
items:
type: number
format: float
surface_temperature_anomaly_gt0:
type: array
items:
type: number
format: float
precipitation_anomaly_gt0:
type: array
items:
type: number
format: float
precipitation_anomaly_gt10:
type: array
items:
type: number
format: float
precipitation_anomaly_gt20:
type: array
items:
type: number
format: float
temperature_2m_sot10:
type: array
items:
type: number
format: float
temperature_2m_sot90:
type: array
items:
type: number
format: float
temperature_2m_efi:
type: array
items:
type: number
format: float
precipitation_efi:
type: array
items:
type: number
format: float
precipitation_sot90:
type: array
items:
type: number
format: float
showers_mean:
type: array
items:
type: number
format: float
snow_density_mean:
type: array
items:
type: number
format: float
snow_density_anomaly:
type: array
items:
type: number
format: float
snow_depth_water_equivalent_mean:
type: array
items:
type: number
format: float
snow_depth_water_equivalent_anomaly:
type: array
items:
type: number
format: float
total_column_integrated_water_vapour_mean:
type: array
items:
type: number
format: float
total_column_integrated_water_vapour_anomaly:
type: array
items:
type: number
format: float
temperature_2m_mean:
type: array
items:
type: number
format: float
temperature_2m_anomaly:
type: array
items:
type: number
format: float
dew_point_2m_mean:
type: array
items:
type: number
format: float
dew_point_2m_anomaly:
type: array
items:
type: number
format: float
pressure_msl_mean:
type: array
items:
type: number
format: float
pressure_msl_anomaly:
type: array
items:
type: number
format: float
sea_surface_temperature_mean:
type: array
items:
type: number
format: float
sea_surface_temperature_anomaly:
type: array
items:
type: number
format: float
wind_u_component_10m_mean:
type: array
items:
type: number
format: float
wind_u_component_10m_anomaly:
type: array
items:
type: number
format: float
wind_v_component_10m_mean:
type: array
items:
type: number
format: float
wind_v_component_10m_anomaly:
type: array
items:
type: number
format: float
wind_u_component_100m_mean:
type: array
items:
type: number
format: float
wind_u_component_100m_anomaly:
type: array
items:
type: number
format: float
wind_v_component_100m_mean:
type: array
items:
type: number
format: float
wind_v_component_100m_anomaly:
type: array
items:
type: number
format: float
snowfall_water_equivalent_mean:
type: array
items:
type: number
format: float
snowfall_water_equivalent_anomaly:
type: array
items:
type: number
format: float
precipitation_mean:
type: array
items:
type: number
format: float
precipitation_anomaly:
type: array
items:
type: number
format: float
cloud_cover_mean:
type: array
items:
type: number
format: float
cloud_cover_anomaly:
type: array
items:
type: number
format: float
sunshine_duration_mean:
type: array
items:
type: number
format: float
sunshine_duration_anomaly:
type: array
items:
type: number
format: float
soil_temperature_0_to_7cm_mean:
type: array
items:
type: number
format: float
soil_temperature_0_to_7cm_anomaly:
type: array
items:
type: number
format: float
temperature_max6h_2m_mean:
type: array
items:
type: number
format: float
temperature_max6h_2m_anomaly:
type: array
items:
type: number
format: float
temperature_min6h_2m_mean:
type: array
items:
type: number
format: float
temperature_min6h_2m_anomaly:
type: array
items:
type: number
format: float
weekly_units:
type: object
properties:
time:
type: string
wind_speed_10m_mean:
type: string
wind_speed_10m_anomaly:
type: string
wind_speed_100m_mean:
type: string
wind_speed_100m_anomaly:
type: string
wind_direction_10m_mean:
type: string
wind_direction_10m_anomaly:
type: string
wind_direction_100m_mean:
type: string
wind_direction_100m_anomaly:
type: string
snow_depth_mean:
type: string
snow_depth_anomaly:
type: string
snowfall_mean:
type: string
snowfall_anomaly:
type: string
temperature_2m_anomaly_gt0:
type: string
temperature_2m_anomaly_gt1:
type: string
temperature_2m_anomaly_gt2:
type: string
temperature_2m_anomaly_ltm1:
type: string
temperature_2m_anomaly_ltm2:
type: string
pressure_msl_anomaly_gt0:
type: string
surface_temperature_anomaly_gt0:
type: string
precipitation_anomaly_gt0:
type: string
precipitation_anomaly_gt10:
type: string
precipitation_anomaly_gt20:
type: string
temperature_2m_sot10:
type: string
temperature_2m_sot90:
type: string
temperature_2m_efi:
type: string
precipitation_efi:
type: string
precipitation_sot90:
type: string
showers_mean:
type: string
snow_density_mean:
type: string
snow_density_anomaly:
type: string
snow_depth_water_equivalent_mean:
type: string
snow_depth_water_equivalent_anomaly:
type: string
total_column_integrated_water_vapour_mean:
type: string
total_column_integrated_water_vapour_anomaly:
type: string
temperature_2m_mean:
type: string
temperature_2m_anomaly:
type: string
dew_point_2m_mean:
type: string
dew_point_2m_anomaly:
type: string
pressure_msl_mean:
type: string
pressure_msl_anomaly:
type: string
sea_surface_temperature_mean:
type: string
sea_surface_temperature_anomaly:
type: string
wind_u_component_10m_mean:
type: string
wind_u_component_10m_anomaly:
type: string
wind_v_component_10m_mean:
type: string
wind_v_component_10m_anomaly:
type: string
wind_u_component_100m_mean:
type: string
wind_u_component_100m_anomaly:
type: string
wind_v_component_100m_mean:
type: string
wind_v_component_100m_anomaly:
type: string
snowfall_water_equivalent_mean:
type: string
snowfall_water_equivalent_anomaly:
type: string
precipitation_mean:
type: string
precipitation_anomaly:
type: string
cloud_cover_mean:
type: string
cloud_cover_anomaly:
type: string
sunshine_duration_mean:
type: string
sunshine_duration_anomaly:
type: string
soil_temperature_0_to_7cm_mean:
type: string
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# Full source: https://raw.githubusercontent.com/api-evangelist/open-meteo/refs/heads/main/openapi/open-meteo-seasonal-openapi.yml