Westerly (RI) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Westerly.
Climate overview of Westerly
The climate in Westerly, Rhode Island, United States of America, is marked by large temperature swings across the seasons, ranging from 27°C (81°F) in July to 4°C (39°F) in January.
The city has a wet climate, receiving around 1211 mm (48 in) of rain/snowfall per year. Despite the high annual total, it has warm summers and cold winters. December is the wettest month. Sunshine peaks in July, when the city sees around 9.7 hours of sunshine per day.
Westerly Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Westerly - and find the best time to visit.
Monthly Temperature in Westerly
In Westerly, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 27°C (81°F) in July to a chilly 4°C (39°F) in January.
Nighttime temperatures range from 18°C (64°F) in July to -6°C (21°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Westerly
Westerly experiences significant rain/snowfall throughout the year, averaging 1211 mm (48 in) of precipitation annually. The wettest period in Westerly occurs in December, which receives around 127 mm (5 in) of precipitation. During the driest month, August, Westerly experiences moderate rainfall, totaling 86 mm (3.4 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Westerly 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 Westerly
In Westerly, summer days are longer and more sunny, with daily sunshine hours peaking at 9.7 hours in July. As the darker season arrives, the brightness of the sun becomes less. November sees a soft sun for only 4.9 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 Westerly by Month
The relative humidity is high throughout the year in Westerly.
The city experiences its highest humidity in August, reaching 73%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Westerly
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: August and September
- Warmest weather: July and August
- Most sunshine: June and July
- Fewest rainy days: August, September and November
- Seasonal pattern: Warm summers and cold winters
- Coldest conditions: January, with freezing nights around -6°C (21°F).
Frequently asked questions about the climate in Westerly
What is the best time to visit Westerly?
August and September typically offer the most optimal weather in Westerly. In contrast, January, February, March and December tend to have less optimal conditions. Westerly has warm summers and cold winters.
What temperatures can I expect in Westerly?
Daytime highs range from 4°C (39°F) in January to 27°C (81°F) in July. Nighttime lows range from -6°C (21°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Westerly get?
Annual rainfall is around 1211 mm (48 in). December is the wettest month with 127 mm (5 in), while August is the driest with 86 mm (3.4 in).
How sunny is Westerly?
Westerly receives around 2,598 hours of sunshine per year. July is the sunniest month with 290 hours, while November is the cloudiest with just 147 hours. Overall, Westerly enjoys abundant sunshine.
Westerly 3-Day Forecast
Westerly on the map
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