Ilmapiir
nine weather models, one clear answer
Weather in Viljandi
Weather forecast for 7 days · Viljandi County, Estonia · updated 14:15
For tomorrow's high temperature the models broadly agree: 9 models give 10.7...13.1 °C, a spread of 2.4 degrees.
7-day weather in Viljandi
| Day | Weather | High | Low | Rain | Wind |
|---|---|---|---|---|---|
| Sunday 25 October |
overcast |
12.6 ° | 6.0 ° | 0.0 mm | 7.3 m/s |
| Monday 26 October |
 drizzle |
12.2 ° | 7.9 ° | 2.2 mm | 7.2 m/s |
| Tuesday 27 October |
overcast |
11.2 ° | 7.7 ° | 0.0 mm | 5.0 m/s |
| Wednesday 28 October |
overcast |
10.8 ° | 6.2 ° | 0.0 mm | 4.8 m/s |
| Thursday 29 October |
drizzle |
10.5 ° | 5.0 ° | 2.7 mm | 3.3 m/s |
| Friday 30 October |
drizzle |
10.4 ° | 3.2 ° | 2.1 mm | 3.1 m/s |
| Saturday 31 October |
 fog |
7.6 ° | 1.4 ° | 0.0 mm | 2.1 m/s |
Weather and climate in Viljandi
Viljandi stands on the edge of the Sakala Upland, on a high bank above a lake, and the inland climate brings warm summers and snowy winters. The higher position means that snow often stays longer in Viljandi than on the low coast.
Summer showers and thunderstorms like to develop over uplands. When the sky turns black, the lightning map shows lightning strikes to the second - you can see whether the storm will pass over Viljandi or miss it.
Where this forecast comes from
Most weather sites show a single model and give the impression that the answer is certain. Ilmapiir compares nine national weather models at once: ECMWF, Germany's DWD ICON, the US GFS, the UK Met Office, Météo-France, Norway's MET, Canada's GEM, Japan's JMA and China's CMA. When the models agree, you can rely on the forecast; when they diverge, it is more honest to say that it is only a probability.
Ilmapiir also records the measured temperature every hour and compares it with what each model promised a day earlier. This gives a rolling 30-day average error for every model - an answer to the question of whom to believe.
Thunderstorms and warnings
The lightning map shows strikes in real time, and your phone can alert you when lightning strikes within a chosen distance of a chosen place. Official warnings from the Estonian Environment Agency are shown in the interactive view, and the rain radar shows where it is raining right now - the radar image updates every 10 minutes.