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Lewiston

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Lewiston Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

Lewiston year round climate

  • Spring (March–May): Average 34–56°F, with fluctuating temperatures and relatively high rainfall, particularly in March and April. Common activities: Outdoor walks (be mindful of changing weather), flower viewing (if available). Recommended clothing: Warm jacket, waterproof clothing, layers.
  • Summer (June–August): Average 63–71°F, warm and humid, with relatively high rainfall; August is the rainiest month. Common activities: Outdoor picnics, hiking (sun and rain protection needed), lakeside activities. Recommended clothing: Lightweight and breathable clothing, rain gear, sun hat.
  • Autumn (September–November): Average 60–39°F, gradually decreasing temperatures and relatively even rainfall. Common activities: Fall foliage viewing (if available), hiking. Recommended clothing: Light jacket, warm clothing, comfortable shoes.
  • Winter (December–February): Average -4.6–-33.6°F, cold and dry, with a higher probability of snowfall; some months have higher rainfall. Common activities: Skiing (if snow conditions allow), indoor activities. Recommended clothing: Heavy coat, warm clothing, waterproof boots.

Lewiston climatological average

Annual average temperature: approx. 47.5°F / Annual rainfall: approx. 1320 mm / Summer humidity: 65%–75% / Rainiest month: August

Lewiston monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
23.7°F
131
February
26.1°F
49.8
March
34.9°F
149.3
April
44.1°F
118.5
May
56.1°F
70.5
June
63.9°F
97.9
July
71.8°F
123.5
August
67.8°F
151
September
60.8°F
100.5
October
50.7°F
102.3
November
39.6°F
82.8
December
30.4°F
143.6

Lewiston weather for the next seven days

12/17
Wednesday
Sunny
39.9°F/19.2°F
12/18
Thursday
Sunny
42.1°F/24.3°F
12/19
Friday
Heavy rain
50.4°F/35.2°F
12/20
Saturday
Light freezing rain
28.4°F/20.8°F
12/21
Sunday
Moderate or heavy snow showers
38.5°F/27.3°F
12/22
Monday
Sunny
23.2°F/18.2°F
12/23
Tuesday
Light freezing rain
31.1°F/17.6°F