Lowell (MA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Lowell.
Climate overview of Lowell
Temperatures in Lowell, Massachusetts, United States of America, vary greatly throughout the year. July is the hottest month at 29°C (84°F), while February is the coldest at 2°C (36°F).
The city has a wet climate, receiving around 1287 mm (51 in) of rain/snowfall per year. October is the wettest month. Sunshine peaks in May, when the city sees around 10.0 hours of sunshine per day.
Lowell Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Lowell — and find the best time to visit.
Monthly Temperature in Lowell
The climate in Lowell 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 very cold 2°C (36°F) in February.
Nighttime temperatures range from 17°C (63°F) in July to -9°C (16°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Lowell
Lowell has a notably wet climate with abundant precipitation, recording 1287 mm (51 in) of rain/snowfall per year. The wettest period in Lowell occurs in October, which receives around 133 mm (5.2 in) of precipitation. During the driest month, September, Lowell experiences moderate rainfall, totaling 88 mm (3.5 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Lowell 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 Lowell
In Lowell, summer days are longer and more sunny, with daily sunshine hours peaking at 10.0 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 4.7 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 Lowell by Month
The relative humidity is high throughout the year in Lowell.
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
Best Time to Visit Lowell
Frequently asked questions about the climate in Lowell
What is the best time to visit Lowell?
September typically offers the most optimal weather in Lowell. In contrast, January, February, March and December tend to have less optimal conditions.
What temperatures can I expect in Lowell?
Daytime highs range from 2°C (36°F) in February to 29°C (84°F) in July. Nighttime lows range from -9°C (16°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Lowell get?
Annual rainfall is around 1287 mm (51 in). October is the wettest month with 133 mm (5.2 in), while September is the driest with 88 mm (3.5 in).
How sunny is Lowell?
Lowell receives around 2,665 hours of sunshine per year. May is the sunniest month with 301 hours, while December is the cloudiest with just 141 hours. Overall, Lowell enjoys abundant sunshine.
Lowell 3-Day Forecast
Lowell (MA) 3-Day Forecast
Lowell on the map
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