Norwich (CT) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Norwich.
Climate overview of Norwich
Temperatures in Norwich, Connecticut, United States of America, vary greatly throughout the year. July is the hottest month at 29°C (84°F), while January is the coldest at 3°C (37°F).
The city has a wet climate, receiving around 1332 mm (52 in) of rain/snowfall per year. Despite the high annual total, it has warm summers and cold winters. March is the wettest month. July is the sunniest month, averaging 9.8 hours of sunshine per day.
Norwich Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Norwich - and find the best time to visit.
Monthly Temperature in Norwich
The climate in Norwich is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a comfortable 29°C (84°F) in July to a chilly 3°C (37°F) in January.
Nighttime temperatures range from 18°C (64°F) in July to -7°C (19°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Norwich
Norwich has a notably wet climate with abundant precipitation, recording 1332 mm (52 in) of rain/snowfall per year. The wettest period in Norwich occurs in March, which receives around 132 mm (5.2 in) of precipitation. During the driest month, January, Norwich experiences moderate snow/rainfall, totaling 91 mm (3.6 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Norwich 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 Norwich
In Norwich, summer days are longer and more sunny, with daily sunshine hours peaking at 9.8 hours in July. As the darker season arrives, the brightness of the sun becomes less. November sees a soft sun for only 4.6 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Norwich by Month
The relative humidity is high throughout the year in Norwich.
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 Norwich
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May
- Warmest weather: July and August
- Most sunshine: July
- Fewer rainy days: February, March, August, September and November
- Seasonal pattern: Warm summers and cold winters
- Coldest conditions: January, with freezing nights around -7°C (19°F).
Frequently asked questions about the climate in Norwich
What is the best time to visit Norwich?
May typically offers the most optimal weather in Norwich. In contrast, January, February, March, November and December tend to have less optimal conditions. Norwich has warm summers and cold winters.
What temperatures can I expect in Norwich?
Daytime highs range from 3°C (37°F) in January to 29°C (84°F) in July. Nighttime lows range from -7°C (19°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Norwich get?
Annual rainfall is around 1332 mm (52 in). March is the wettest month with 132 mm (5.2 in), while January is the driest with 91 mm (3.6 in).
How sunny is Norwich?
Norwich 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, Norwich enjoys abundant sunshine.
Norwich 3-Day Forecast
Norwich (CT) 3-Day Forecast
Norwich on the map
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