Westborough (MA) Weather & Climate: Best Time to Visit

The climate in Westborough is known for significant temperature differences throughout the year, making the weather dynamic. Average daytime temperatures reach a comfortable 29°C (84°F) in July. In January, the coolest month of the year, temperatures drop to a very cold 2°C (36°F).

At night, temperatures range from around 17°C (63°F) in July to -9°C (16°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Westborough has a notably wet climate with abundant precipitation, recording 1227 mm (48 in) of rain/snowfall per year. Despite minor fluctuations, Westborough enjoys fairly consistent precipitation throughout the year. In June, you can expect around 133 mm (5.2 in) of precipitation, while in September, Westborough receives about 84 mm (3.3 in). For more details, please visit our Westborough Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Westborough can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 10.0 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 4.7 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

The relative humidity is high throughout the year in Westborough.

The city experiences its highest humidity in August, reaching 72%. In February, the humidity drops to its lowest level at 62%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year