Climate Overview
The climate in Brownsburg-Chatham is cool. The average annual temperature is 5°C and approximately 1369mm of precipitation falls per year. Brownsburg-Chatham receives a notable amount of rainfall throughout the year, including during its driest month. Brownsburg-Chatham 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, February, December, when temperatures can drop to -14°C. Brownsburg-Chatham experiences heavy snowfall, typically from January through December.
Temperature
Brownsburg-Chatham has a wide annual temperature range, spanning 40°C from the coldest to warmest months. The warmest month is July, when average highs reach 26°C and the mean temperature sits around 20°C. The coldest month is January, when overnight lows fall to -14°C and the daily average is -9°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 9°C shift in average temperatures.
Precipitation
Brownsburg-Chatham is a fairly wet location, receiving approximately 1369mm of precipitation annually, which averages out to around 114mm per month. The wettest month is October, averaging 150mm of rainfall. August and April also tend to see above-average precipitation. The driest month is September, with just 88mm. That's 62mm less than October, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Brownsburg-Chatham receives heavy snowfall, accumulating around 306cm annually from January through December. The snowiest month is February, with approximately 73cm. Winter travel should account for significant snow cover.
Wind
Brownsburg-Chatham is relatively calm, with an average annual wind speed of 3km/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 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 3km/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.
Seasons
92 days until Autumn
It is currently summer in Brownsburg-Chatham, which began on June 21, 2026. Brownsburg-Chatham 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 26°C, while the coldest stretch bottoms out in January near -14°C. Autumn is next, beginning on September 23, 2026 — 92 days from now.
Spring
Temperatures range from -7 to 18°C. Rainfall is heavy, totalling around 350mm across the season with a monthly average of 117mm. Winds are generally light, averaging 3km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 11 to 26°C. Rainfall is heavy, totalling around 362mm across the season with a monthly average of 121mm. Winds are generally light, averaging 3km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -4 to 20°C. Rainfall is heavy, totalling around 341mm across the season with a monthly average of 114mm. Expect around 44cm of snow accumulation during this period. Winds are generally light, averaging 3km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -14 to -3°C. Rainfall is heavy, totalling around 317mm across the season with a monthly average of 106mm. Expect around 194cm of snow accumulation during this period. Winds are generally light, averaging 3km/h. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.
Monthly Climate Data
The table below shows monthly climate averages for Brownsburg-Chatham 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. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. 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.
