Best time to be outside
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Chance of rain
0%
Checking the sky…
Gusts over 30 km/h
0%
Asking 7 models and 3 ensembles about the next 24 hours.
NowDrag to travel 48 hours ahead
The sky is drawn from live data: sun position, cloud cover, wind and precipitation.
Rain & wind odds
Seven national weather models and 122 ensemble runs, sampled across the whole city rather than one point, then scored and blended into one chance for the next 24 hours.
Big cities can be wet in one district and dry in another.
Asking seven models and three ensembles about the next 24 hours…
122 possible futures
Each dot is one run of an ensemble forecast, started from slightly different conditions. A filled dot is a run that brings at least 0.2 mm of rain in the next 24 hours.
Where in the city
The models are sampled at 13 points: the centre, 8 points on the edge of the city and 4 half-way. Each number is the chance at that point. Choose a point to see the odds for that spot only.
Hour by hour
Chance of rainWind speedGustsYour gust limit
Do the models agree?
Each national model's 24-hour rain total and strongest gust, with its score and how much it counts in the blend. Better-scoring models count more.
Your limits, source scores and how it works
Your limits
30 km/h (8 m/s): small branches move and dust blows. 50 km/h (14 m/s): walking into it gets hard. Changes recalculate instantly.
Models
| Source | Score | Rain in 24 h | Max wind / gust | Weight |
|---|
Ensembles
| Ensemble | Runs | Chance of rain | Strong gusts |
|---|
How the numbers are made
- Location: the models are read at 13 points across the city (radius set by city size: about 18 km for Tehran) and the ensembles at 5. "Anywhere in the city" counts a run or model as rainy if it rains at any of those points (the neighbourhood method used by forecasting centres); "at one spot" uses only the nearest points. Your own location from the location button is always a single exact point.
- Source score (0 to 100): 40% the model's global track record, 25% how fine its grid is (finer models see local showers better), 25% how closely it agrees with the ensembles, 10% how complete its data is.
- Weight is proportional to the score squared, so better sources count much more.
- Hourly chance of rain: 55% the share of ensemble runs with rain in that hour, 45% the weighted vote of the models. Model rain one hour early or late still half-counts, because models often get timing slightly wrong.
- 24-hour chance of rain: the chance of at least 0.25 mm in total (the usual "measurable rain" level). Only what the models actually forecast is counted, and traces below that are ignored, because global models produce many tiny drizzle amounts that never reach the ground in dry climates.
- Amounts: the typical (median) and wetter (90th percentile) 24-hour total across all 122 ensemble runs.
- Chance of strong gusts: the chance that gusts pass your limit in at least one hour.
- Best time to be outside: the 3-hour stretch with the lowest combined chance of rain and strong gusts.
- Confidence is high when the sources agree and low when they disagree.
Data from ECMWF, Met Office, DWD, NOAA, Météo-France, JMA and ECCC through Open-Meteo. This does not replace official warnings.
Instruments
Conditions for the moment shown in the sky above. Move the time slider and every dial follows.
Ask about the weather
Answers come only from the forecast for Seoul, with the time period and data source shown under each one.
Pick a question or type your own.
Forecast
Tap any hour to show it in the sky. Charts cover the next 48 hours.
Air quality
Model forecast from the Copernicus Atmosphere Monitoring Service (CAMS), not a reading from a monitoring station. The line on each bar marks the World Health Organization's 24-hour guideline.
Loading air quality…
Weather alerts
Generated from the forecast with the fixed rules below, for the next 72 hours. These are not official warnings; for those, follow your national weather service, such as IRIMO in Iran.
When an alert is raised
Weather maps
Live animated maps from Ventusky, centred on Seoul. Pick a layer, then drag and zoom inside the map.
More weather tools
Specialist sites for wind, satellite views and air pollution. Each opens in a new tab.
About
Ghaheri Weather shows model forecasts for any city in a clear, honest way.
Where the data comes from
Forecasts, current conditions and city search come from Open-Meteo, which combines national weather models such as ECMWF, GFS and ICON. Air quality comes from the CAMS model. "Now" values are model analyses for this hour, not readings from a nearby station.
How far to trust a forecast
The next three days are the most reliable. Days four to seven show trends. Days eight to sixteen are long-range guidance and often change, which is why they fade out in the daily list. Rain timing is less certain than temperature.
Privacy
No account is needed. Favorites, recent cities and unit choices stay in your browser. Your location is used only after you press the location button and allow it.