Lewiston weather by month
What a typical year looks like in Lewiston, Maine: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Durham, 12 km from Lewiston; records cover 1994–2026.
The year at a glance
- Precipitation a year
- 49.7 in1263 mm
- Snow a year
- 78 in197 cm
- Last spring freeze
- May 13
- First fall freeze
- Oct 3
- Heating degree days
- 7,921
- Cooling degree days
- 256
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −13°−25° (heating, 99%) and 90°32° (cooling, 1%).
Month by month
Lewiston in January
Highs average 29°−1° and lows 8°−14°, with 3.6 in92 mm of precipitation and 21 in53 cm of snow in a typical January.
- Record high
- 62°17° (2007)
- Record low
- −27°−33° (2009)
- Heating degree days
- 1444
- Cooling degree days
- 0
Lewiston in February
Highs average 33°0° and lows 9°−13°, with 3.4 in85 mm of precipitation and 19 in49 cm of snow in a typical February.
- Record high
- 64°18° (2018)
- Record low
- −23°−31° (2003)
- Heating degree days
- 1235
- Cooling degree days
- 0
Lewiston in March
Highs average 41°5° and lows 19°−7°, with 4.1 in103 mm of precipitation and 14 in35 cm of snow in a typical March.
- Record high
- 86°30° (2012)
- Record low
- −15°−26° (2005)
- Heating degree days
- 1079
- Cooling degree days
- 0
Lewiston in April
Highs average 54°12° and lows 30°−1°, with 4.5 in115 mm of precipitation and 4 in9 cm of snow in a typical April.
- Record high
- 91°33° (2009)
- Record low
- 12°−11° (1995)
- Heating degree days
- 695
- Cooling degree days
- 0
Lewiston in May
Highs average 65°19° and lows 40°4°, with 3.6 in91 mm of precipitation in a typical May.
- Record high
- 95°35° (2017)
- Record low
- 24°−4° (2007)
- Heating degree days
- 391
- Cooling degree days
- 5
Lewiston in June
Highs average 74°23° and lows 50°10°, with 4.6 in118 mm of precipitation in a typical June.
- Record high
- 99°37° (2025)
- Record low
- 31°−1° (2020)
- Heating degree days
- 133
- Cooling degree days
- 42
Lewiston in July
Highs average 79°26° and lows 56°13°, with 3.8 in95 mm of precipitation in a typical July.
- Record high
- 97°36° (1999)
- Record low
- 44°7° (2000)
- Heating degree days
- 28
- Cooling degree days
- 108
Lewiston in August
Highs average 78°25° and lows 54°12°, with 3.7 in93 mm of precipitation in a typical August.
- Record high
- 97°36° (2001)
- Record low
- 37°3° (2007)
- Heating degree days
- 51
- Cooling degree days
- 79
Lewiston in September
Highs average 70°21° and lows 47°8°, with 4.2 in105 mm of precipitation in a typical September.
- Record high
- 97°36° (1999)
- Record low
- 27°−3° (2000)
- Heating degree days
- 218
- Cooling degree days
- 22
Lewiston in OctoberThis month
Highs average 58°15° and lows 36°2°, with 5.4 in136 mm of precipitation and 0.3 in0.8 cm of snow in a typical October.
- Record high
- 87°31° (2025)
- Record low
- 18°−8° (1997)
- Heating degree days
- 562
- Cooling degree days
- 0
Lewiston in November
Highs average 46°8° and lows 27°−3°, with 4.5 in114 mm of precipitation and 3 in8 cm of snow in a typical November.
- Record high
- 77°25° (2024)
- Record low
- 3°−16° (2018)
- Heating degree days
- 864
- Cooling degree days
- 0
Lewiston in December
Highs average 35°2° and lows 16°−9°, with 4.5 in115 mm of precipitation and 16 in41 cm of snow in a typical December.
- Record high
- 68°20° (1998)
- Record low
- −23°−31° (2017)
- Heating degree days
- 1221
- Cooling degree days
- 0