Waltham Weather & Climate: Best Time to Visit

The climate in Waltham is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a comfortable 22°C (72°F) in August to a chilly 9°C (48°F) in February.

Nighttime temperatures range from 15°C (59°F) in August to 4°C (39°F) in February.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Waltham receives mid-range precipitation levels, with 768 mm (30 in) annually. The wettest period in Waltham occurs in November, which receives around 77 mm (3 in) of precipitation. During the driest month, March, Waltham experiences moderate rainfall, totaling 49 mm (1.9 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Waltham Precipitation page.

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

The average number of days each month with precipitation

In Waltham, summer days are longer and more sunny, with daily sunshine hours peaking at 6.8 hours in June. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.7 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine