The Google Weather forecast is created from an internal forecasting system that utilizes weather models and observations from global weather agencies.
Learn more about the Google Weather forecasting data sources:
- Deutscher Wetterdienst
- Environment Canada
- EUMETNET
- European Centre for Medium-range Weather Forecasts (ECMWF)
- National Oceanic and Atmospheric Administration (NOAA)
- National Weather Service
- Met Office
- Unidata
The Google nowcast
You can find short-term precipitation forecasts up to 12 hours in advance with the Google nowcast. The weather information box shows the Google nowcast when you search for weather data on a mobile device.
Important:
- The start and end times that show are in the local time zone of the location you search for.
- This high accuracy short-term precipitation information is available in theUnited States, Japan, and Europe.
Our nowcast uses radar and numerical weather prediction data published by various data sources.
Learn more about the Google nowcast data sources:
- Deutscher Wetterdienst
- EUMETNET
- European Centre for Medium-range Weather Forecasts (ECMWF)
- National Oceanic and Atmospheric Administration (NOAA)
- Met Office
- Japan Meteorological Agency
In Japan, the nowcast forecast is provided byWeathernewsby utilizing the technology we developed in collaboration withWeathernews. The technology leverages Google's AI analysis capabilities on Weathernews' high-precision data. The explanations about Japan here apply to other relevant sections below as well.
Should I expect precipitation during the day?
You can check the next precipitation event with the Google nowcast. All precipitation will show in the hourly precipitation forecast.
Why can't I find the Google nowcast?
If there is no forecast for rain, hail or snow, or if the forecast is too uncertain, the Google nowcast data will not display.
In such cases, all weather information is shown in the hourly precipitation forecast. In addition, the Google nowcast may not be available on all weather surfaces.
Reports on current weather conditions
When you search for weather info on Google, you might be asked to provide feedback on the current weather in your area. Your feedback helps us monitor the quality of weather results and update the data.
You can find and delete your feedback in My Activity. When you delete your feedback from your Google Account, the feedback is no longer associated with your account, but it can still help improve weather results.
Google Excessive heat warning
Please see Excessive heat warning FAQs.
Air quality information
How an Air Quality Index (AQI) near you is selected
To show the air quality at your location, Google applies the air quality model. Learn how to understand and manage your location.
If you search a city’s air quality, like “weather in London,” the result might be for a location far away from you.
The air quality may be incorrect even if you're in the same city.
To get AQI for your location:
- On the header, click Choose area.
- Select your precise location.
What is the data source of Google’s Air Quality model, and is it accurate at all times?
Google’s air quality model combines data from various input sources and weights the layers in a sophisticated way. The input layers are governmental reference monitoring stations, commercial sensor networks, global and regional dispersion models, fire smoke and dust models, satellite information, traffic data, and auxiliary information, such as land cover and meteorology. Learn more about air quality.
Air quality data sources
Google Air Quality model contains information available from the sources below:
Global data sources
- Low-cost sensor data from Purple Air.
- Modified Copernicus Atmosphere Monitoring Service information.
- Modified Copernicus Global Land Cover information.
- Met Office. Contains public sector information licensed under the Open Government Licence v3.0.
- European EEA information under CC-BY-2.5 DK license.
Belgium
- Modified IRCEL - CELINE information. License.
Canada
- Information from the Manitoba government, licensed under the OpenMB Information and Data Use Licence Manitoba.ca/OpenMB.
- Information licensed under the Open Government Licence – Ontario, version 1.0.
Denmark
- DCE - National Center for Miljø og Energi. The data is raw data that isn't quality controlled.
Finland
France
- Pays de la Loire: Source of the data: Air Pays de la Loire.
- Geo D'Air.
Germany
- Contains modifiedGerman Environment Agency information. Changes were made.
Guernsey
- © Crown 2023 copyright Defra via uk-air.defra.gov.uk.
Italy
- Regione del Veneto. License.
Ireland
Environmental Protection Agency (EPA): https://www.epa.ie/ https://airquality.ie/. License.
Japan
- Modified Soramame information.
Mexico
- The Air Quality information published by the Environment Secretariat of the Government of Mexico City is prepared from the information obtained from the Atmospheric Monitoring Network and its monitoring stations in the Metropolitan Zone of the Valley of Mexico, which are operated and managed by the Air Quality Monitoring Directorate of the General Directorate of Air Quality (SEDEMA). This information is public and free, and it is subject to quality processes that could modify it. The dissemination or use of this information by third parties is under the responsibility of the person who publishes or uses it.
- SINAICA, https://sinaica.inecc.gob.mx/. Changes were made.
Spain
- MeteoGalicia and the Ministry of the Environment, Territory and Housing of Xunta de Galicia.
- Madrid Comunidad.
- Ministry of the Environment information under CC BY 4.0 license.
Sweden
- Contains modified SMHI information.
UK
- © Crown 2023 copyright Defra via uk-air.defra.gov.uk.
- Contains LondonAir information. License.
- Northern Ireland Air.
US
- Texas TCEQ.
- New York State, Department of Environmental Conservation: The data displayed here are from www.nyaqinow.net. This data is preliminary and subject to change.
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