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Bloomington Weather by Month
Average temperatures, rainfall and humidity for Bloomington, United States, month by month, built from OpenWeather's historical records. Use it to see what a typical Bloomington month looks like before you travel — then check the live Bloomington forecast for the days ahead.
Warmest month
July
29°C average high
Coolest month
January
-7°C average low
Wettest month
October
164 mm of rain
Driest month
February
21 mm of rain
Average temperature and rainfall in Bloomington by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 1°C | -7°C | -29°C / 18°C | 74 mm | 78% | 14 km/h |
| February | 4°C | -6°C | -24°C / 25°C | 21 mm | 74% | 14 km/h |
| March | 11°C | 1°C | -22°C / 31°C | 54 mm | 70% | 15 km/h |
| April | 18°C | 6°C | -12°C / 30°C | 77 mm | 66% | 15 km/h |
| May | 24°C | 13°C | -1°C / 35°C | 74 mm | 68% | 12 km/h |
| June | 29°C | 18°C | 9°C / 35°C | 87 mm | 70% | 11 km/h |
| July | 29°C | 19°C | 11°C / 36°C | 55 mm | 76% | 10 km/h |
| August | 29°C | 18°C | 9°C / 38°C | 57 mm | 77% | 9 km/h |
| September | 27°C | 15°C | 1°C / 36°C | 69 mm | 72% | 10 km/h |
| October | 19°C | 8°C | -4°C / 32°C | 164 mm | 71% | 12 km/h |
| November | 11°C | 2°C | -16°C / 25°C | 58 mm | 73% | 13 km/h |
| December | 5°C | -3°C | -23°C / 20°C | 55 mm | 78% | 13 km/h |
Best time to visit Bloomington
The most comfortable time to visit Bloomington is generally May and August to September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around October, totalling about 844 mm a year.
Travellers who prefer heat should aim for July, when highs average 29°C. October is the month to avoid if rain would spoil your plans — it averages 164 mm, roughly 8× the rainfall of February.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Bloomington forecast for what is happening now.