Yosemite National Park is definitely worth a visit
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Lewiston (ME) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Lewiston.
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Climate overview of Lewiston
Lewiston, Maine, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 27°C (81°F) in July, while winters cool to -1°C (30°F) in January.
With around 1302 mm (51 in) of annual rain/snowfall, Lewiston has a notably wet climate. However, this rain/snowfall is not evenly distributed, the city has warm summers and very cold winters. The wettest month is June. Sunshine peaks in July, when the city sees around 9.3 hours of sunshine per day.
Lewiston Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Lewiston - and find the best time to visit.
Monthly Temperature in Lewiston
Depending on the time of the year, temperatures range from comfortable to very cold in Lewiston. Average daytime temperatures reach a comfortable 27°C (81°F) in July. In January, the coolest month of the year, temperatures drop to a very cold -1°C (30°F).
At night, temperatures range from around 16°C (61°F) in July to -12°C (10°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Lewiston
Lewiston has a relatively rain/snowy climate with high precipitation levels, averaging 1302 mm (51 in) of rain/snowfall annually. Lewiston experiences moderate seasonal variation in rainfall, with monthly averages ranging from 154 mm (6.1 in) in June, the wettest month, and 78 mm (3.1 in) in January, the driest month. For more details, please visit our Lewiston 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 Lewiston
Lewiston can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 9.3 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
Data from: Portland, the United States of America (48 KM, 30 Miles).
Daily hours of sunshine
Data from: Portland, the United States of America (48 KM, 30 Miles).
Daily percentage of sunshine
Data from: Portland, the United States of America (48 KM, 30 Miles).
Humidity in Lewiston by Month
The relative humidity is high throughout the year in Lewiston.
The city experiences its highest humidity in September, reaching 77%. In February, the humidity drops to its lowest level at 65%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Portland, the United States of America (48 KM, 30 Miles).
Best Time to Visit Lewiston
The most comfortable overall weather for exploring Lewiston is usually found in May, June, July, August and September. Conditions are generally least comfortable in January, February, March, April, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
very cold
Feb
cold
Mar
cold
Apr
wet
May
very good
Jun
very good
Jul
very good
Aug
very good
Sep
very good
Oct
mixed
Nov
wet
Dec
cold
- Best overall: May, June, July, August and September
- Warmest weather: July and August
- Most sunshine: July and August
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -12°C (10°F).
Frequently asked questions about the climate in Lewiston
What is the best time to visit Lewiston?
May, June, July, August and September typically offer the most optimal weather in Lewiston. In contrast, January, February, March, April, November and December tend to have less optimal conditions. Lewiston has warm summers and very cold winters.
What temperatures can I expect in Lewiston?
Daytime highs range from -1°C (30°F) in January to 27°C (81°F) in July. Nighttime lows range from -12°C (10°F) to 16°C (61°F). Temperatures vary considerably through the year.
How much rain does Lewiston get?
Annual rainfall is around 1302 mm (51 in). June is the wettest month with 154 mm (6.1 in), while January is the driest with 78 mm (3.1 in).
How sunny is Lewiston?
Lewiston receives around 2,497 hours of sunshine per year. July is the sunniest month with 278 hours, while December is the cloudiest with just 140 hours. Overall, Lewiston enjoys abundant sunshine.
Lewiston 3-Day Forecast
Lewiston on the map
Lewiston is highlighted - select any city to see its climate.
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Where to go in October - average daytime high across popular destinations.
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