Climate Insights for Bloomington

The climate in Bloomington is temperate. The average annual temperature is 18°C and approximately 404mm of precipitation falls per year. December is the wettest month, receiving around 108mm of rainfall. Bloomington is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to 6°C.

Temperatures in Bloomington vary considerably across the year, with a 27°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 33°C and the mean temperature sits around 26°C. January is the coolest month, with minimum temperatures around 6°C and an average of 10°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between May and June, with a 7°C shift in average temperatures.

Bloomington is a relatively dry area, receiving approximately 404mm of precipitation annually, which averages out to around 34mm per month. The wettest month is December, averaging 108mm of rainfall. January and April also tend to see above-average precipitation. The driest month is August, with just 0mm. That's 108mm less than December, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Bloomington is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 0km/h between the calmest and windiest months.

It is currently summer in Bloomington, which began on June 21, 2026. Bloomington is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 33°C, while the coldest stretch bottoms out in January near 6°C. Autumn is next, beginning on September 23, 2026 — 52 days from now.

The best time to visit Bloomington is during April, May, June, September, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 22mm per month. By contrast, July can be uncomfortably hot with highs reaching 33°C, while January is the coldest period with lows dropping to 6°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Bloomington based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.