Lewiston, Maine Climate by Month
Lewiston, Maine, United States
Warm summers and freezing winters, with rain spread through the year.
Warm summers and freezing winters, with rain spread through the year: that's Lewiston's climate in short. Expect highs of 80°F (27°C) in July and 30°F (-1°C) in January, with the coldest nights (January) near 11°F (-12°C). It gets 46 in (1167 mm) of rain a year, spread across the months.
- Warmest month
- 80°F(27°C)
- Average high, July
- Coldest nights
- 11°F(-12°C)
- Average low, January
- Rain per year
- 46 in(1167 mm)
- No clear rainy season
- Humidity
- 72%
- Sunniest: July
Best and worst months in Lewiston
Best for weatherJune and August are the best time for weather in Lewiston: highs near 77°F (25°C) and about 3.6 in (91 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 30°F (-1°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in June.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Lewiston weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 30°F(-1°C) | 11°F(-12°C) | 3.3 in(85 mm) | 80% | 1.5 |
| FebFebruary | 33°F(0°C) | 12°F(-11°C) | 3.2 in(82 mm) | 73% | 2.4 |
| MarMarch | 41°F(5°C) | 22°F(-5°C) | 4.2 in(107 mm) | 66% | 3.5 |
| AprApril | 53°F(12°C) | 33°F(1°C) | 4.3 in(110 mm) | 63% | 4.6 |
| MayMay | 65°F(19°C) | 44°F(6°C) | 3.5 in(90 mm) | 62% | 5.2 |
| JunJuneBest | 74°F(24°C) | 53°F(12°C) | 3.9 in(100 mm) | 69% | 5.6 |
| JulJuly | 80°F(27°C) | 59°F(15°C) | 3.3 in(84 mm) | 72% | 5.6 |
| AugAugustBest | 79°F(26°C) | 58°F(14°C) | 3.2 in(81 mm) | 72% | 5.2 |
| SepSeptember | 71°F(22°C) | 50°F(10°C) | 3.4 in(87 mm) | 77% | 4.0 |
| OctOctober | 59°F(15°C) | 39°F(4°C) | 5.0 in(127 mm) | 76% | 2.5 |
| NovNovember | 47°F(8°C) | 30°F(-1°C) | 3.9 in(100 mm) | 76% | 1.6 |
| DecDecember | 36°F(2°C) | 20°F(-7°C) | 4.5 in(114 mm) | 78% | 1.3 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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