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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 1.6–13.4°C, 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 17.7–22.1°C, 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 16.0–4.2°C, 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–-0.9°C, 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. 8.6°C / Annual rainfall: approx. 1320 mm / Summer humidity: 65%–75% / Rainiest month: August

Lewiston monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
-4.6°C
131
February
-3.3°C
49.8
March
1.6°C
149.3
April
6.7°C
118.5
May
13.4°C
70.5
June
17.7°C
97.9
July
22.1°C
123.5
August
19.9°C
151
September
16°C
100.5
October
10.4°C
102.3
November
4.2°C
82.8
December
-0.9°C
143.6

Lewiston weather for the next seven days

2/1
Sunday
Sunny
-2.1°C/-20.6°C
2/2
Monday
Partly Cloudy
0°C/-16.8°C
2/3
Tuesday
Sunny
-2.5°C/-13.4°C
2/4
Wednesday
Cloudy
-1.2°C/-14.3°C
2/5
Thursday
Light freezing rain
-5.3°C/-17.3°C
2/6
Friday
Moderate snow
-5.5°C/-15.8°C
2/7
Saturday
Overcast
-11.7°C/-17.8°C