Snohomish weather by month
What a typical year looks like in Snohomish, Washington: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at EVERETT SNOHOMISH COUNTY AP, 14 km from Snohomish; records cover 1948–2026.
The year at a glance
- Precipitation a year
- 33.4 in848 mm
- Snow a year
- Rare
- Last spring freeze
- Mar 8
- First fall freeze
- Nov 20
- Heating degree days
- 5,040
- Cooling degree days
- 96
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 25°−4° (heating, 99%) and 84°29° (cooling, 1%).
Month by month
Snohomish in January
Highs average 46°8° and lows 37°3°, with 3.9 in99 mm of precipitation in a typical January.
- Record high
- 65°18° (2024)
- Record low
- 3°−16° (1950)
- Heating degree days
- 738
- Cooling degree days
- 0
Snohomish in February
Highs average 48°9° and lows 37°3°, with 2.8 in72 mm of precipitation in a typical February.
- Record high
- 64°18° (1949)
- Record low
- 9°−13° (1950)
- Heating degree days
- 633
- Cooling degree days
- 0
Snohomish in March
Highs average 52°11° and lows 39°4°, with 3.6 in92 mm of precipitation in a typical March.
- Record high
- 78°26° (2004)
- Record low
- 21°−6° (2009)
- Heating degree days
- 611
- Cooling degree days
- 0
Snohomish in April
Highs average 56°13° and lows 43°6°, with 2.7 in68 mm of precipitation in a typical April.
- Record high
- 83°28° (2016)
- Record low
- 31°−1° (1948)
- Heating degree days
- 470
- Cooling degree days
- 0
Snohomish in May
Highs average 63°17° and lows 48°9°, with 2.1 in54 mm of precipitation in a typical May.
- Record high
- 88°31° (2008)
- Record low
- 34°1° (2002)
- Heating degree days
- 311
- Cooling degree days
- 3
Snohomish in June
Highs average 66°19° and lows 51°11°, with 1.9 in48 mm of precipitation in a typical June.
- Record high
- 100°38° (2021)
- Record low
- 40°4° (1952)
- Heating degree days
- 193
- Cooling degree days
- 10
Snohomish in July
Highs average 72°22° and lows 55°13°, with 0.84 in21 mm of precipitation in a typical July.
- Record high
- 100°38° (2009)
- Record low
- 41°5° (1950)
- Heating degree days
- 81
- Cooling degree days
- 34
Snohomish in August
Highs average 73°23° and lows 55°13°, with 0.98 in25 mm of precipitation in a typical August.
- Record high
- 100°38° (2020)
- Record low
- 46°8° (1951)
- Heating degree days
- 62
- Cooling degree days
- 38
Snohomish in September
Highs average 68°20° and lows 52°11°, with 1.7 in43 mm of precipitation in a typical September.
- Record high
- 88°31° (1950)
- Record low
- 37°3° (1948)
- Heating degree days
- 161
- Cooling degree days
- 11
Snohomish in OctoberThis month
Highs average 58°14° and lows 46°8°, with 3.4 in85 mm of precipitation in a typical October.
- Record high
- 87°31° (2022)
- Record low
- 29°−2° (2002)
- Heating degree days
- 408
- Cooling degree days
- 0
Snohomish in November
Highs average 50°10° and lows 40°4°, with 5 in126 mm of precipitation in a typical November.
- Record high
- 73°23° (1949)
- Record low
- 14°−10° (2010)
- Heating degree days
- 606
- Cooling degree days
- 0
Snohomish in December
Highs average 45°7° and lows 36°2°, with 4.5 in115 mm of precipitation in a typical December.
- Record high
- 62°17° (2014)
- Record low
- 10°−12° (2008)
- Heating degree days
- 766
- Cooling degree days
- 0