Waterbury (CT) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Waterbury.
Climate overview of Waterbury
Waterbury, Connecticut, United States of America, sees big temperature differences between seasons, with July peaking at 28°C (82°F) and January dropping to 2°C (36°F).
Rain/snowfall is high, totalling around 1319 mm (52 in) per year. June is the wettest month and January the driest. The city also experiences warm summers and cold winters. The most sunshine falls in July, with an average of 9.8 hours of daily sunshine.
Waterbury Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Waterbury - and find the best time to visit.
Monthly Temperature in Waterbury
Visitors to Waterbury can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 28°C (82°F) in July, the warmest time of the year, to a chilly 2°C (36°F) during cooler months like January.
At night, you can expect temperatures ranging from 17°C (63°F) in July to around -8°C (18°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Waterbury
Waterbury is known for its substantial rain/snowfall, with annual precipitation reaching 1319 mm (52 in). While rainfall varies throughout the year, each season offers its own charm. June brings wetter days averaging 149 mm (5.9 in) of precipitation, spread over 14 rainy days.
In contrast, the driest month January experiences a drier climate, with about 83 mm (3.3 in) of snow/rainfall spread across 11 snowy/rainy days. For more details, please visit our Waterbury Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Waterbury
Seasonal changes in sunshine hours are quite dramatic in Waterbury. While July receives considerable daily sunshine with up to 9.8 hours, November marks the darkest time of the year, where sunshine is scarce with only 4.6 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Waterbury by Month
The relative humidity is high throughout the year in Waterbury.
The city experiences its highest humidity in September, reaching 72%. In April, the humidity drops to its lowest level at 58%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Waterbury
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: September
- Warmest weather: July and August
- Most sunshine: July
- Seasonal pattern: Warm summers and cold winters
- Coldest conditions: January, with freezing nights around -8°C (18°F).
Frequently asked questions about the climate in Waterbury
What is the best time to visit Waterbury?
September typically offers the most optimal weather in Waterbury. In contrast, January, February, March and December tend to have less optimal conditions. Waterbury has warm summers and cold winters.
What temperatures can I expect in Waterbury?
Daytime highs range from 2°C (36°F) in January to 28°C (82°F) in July. Nighttime lows range from -8°C (18°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Waterbury get?
Annual rainfall is around 1319 mm (52 in). June is the wettest month with 149 mm (5.9 in), while January is the driest with 83 mm (3.3 in).
How sunny is Waterbury?
Waterbury receives around 2,579 hours of sunshine per year. July is the sunniest month with 293 hours, while November is the cloudiest with just 139 hours. Overall, Waterbury enjoys abundant sunshine.
Waterbury 3-Day Forecast
Waterbury (CT) 3-Day Forecast
Waterbury on the map
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