Climate Insights for Hartford

The climate in Hartford is cool. The average annual temperature is 7°C and approximately 1132mm of precipitation falls per year. Hartford receives a notable amount of rainfall throughout the year, including during its driest month. Hartford 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 -10°C. Hartford experiences heavy snowfall, typically from January through December.

Hartford has a wide annual temperature range, spanning 37°C from the coldest to warmest months. The warmest month is July, when average highs reach 27°C and the mean temperature sits around 22°C. The coldest month is January, when overnight lows fall to -10°C and the daily average is -6°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 8°C shift in average temperatures.

Hartford is a moderately rainy area, receiving approximately 1132mm of precipitation annually, which averages out to around 94mm per month. The wettest month is October, averaging 130mm of rainfall. December and April also tend to see above-average precipitation. The driest month is September, with just 51mm. That's 79mm less than October, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Hartford receives heavy snowfall, accumulating around 266cm annually from January through December. The snowiest month is February, with approximately 59cm. Winter travel should account for significant snow cover.

Hartford 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 March, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, 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 1km/h between the calmest and windiest months.

It is currently spring in Hartford, which began on March 20, 2026. Hartford 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 27°C, while the coldest stretch bottoms out in January near -10°C. Summer is next, beginning on June 21, 2026 — 6 days from now.

The best time to visit Hartford is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 74mm per month. By contrast, January can be quite cold with temperatures dropping to -10°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Hartford 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.