Sequim weather by month
What a typical year looks like in Sequim, Washington: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Sequim 2 E, 2 km from Sequim; records cover 1980–2026.
The year at a glance
- Precipitation a year
- 16.9 in428 mm
- Snow a year
- 1.4 in3.6 cm
- Last spring freeze
- Apr 23
- First fall freeze
- Oct 18
- Heating degree days
- 5,886
- Cooling degree days
- 21
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 19°−7° (heating, 99%) and 82°28° (cooling, 1%).
Month by month
Sequim in January
Highs average 46°8° and lows 32°0°, with 2.2 in55 mm of precipitation in a typical January.
- Record high
- 68°20° (2005)
- Record low
- 0°−18° (1982)
- Heating degree days
- 798
- Cooling degree days
- 0
Sequim in February
Highs average 48°9° and lows 32°0°, with 1.4 in35 mm of precipitation in a typical February.
- Record high
- 63°17° (1983)
- Record low
- −3°−19° (1989)
- Heating degree days
- 701
- Cooling degree days
- 0
Sequim in March
Highs average 51°11° and lows 35°1°, with 1.5 in38 mm of precipitation in a typical March.
- Record high
- 76°24° (2004)
- Record low
- 12°−11° (1989)
- Heating degree days
- 685
- Cooling degree days
- 0
Sequim in April
Highs average 56°13° and lows 38°3°, with 1.2 in31 mm of precipitation in a typical April.
- Record high
- 77°25° (2002)
- Record low
- 19°−7° (2001)
- Heating degree days
- 544
- Cooling degree days
- 0
Sequim in May
Highs average 62°16° and lows 44°7°, with 1.2 in29 mm of precipitation in a typical May.
- Record high
- 86°30° (1983)
- Record low
- 28°−2° (1999)
- Heating degree days
- 377
- Cooling degree days
- 0
Sequim in June
Highs average 65°19° and lows 49°9°, with 0.94 in24 mm of precipitation in a typical June.
- Record high
- 93°34° (2021)
- Record low
- 33°1° (1991)
- Heating degree days
- 239
- Cooling degree days
- 2
Sequim in July
Highs average 70°21° and lows 52°11°, with 0.51 in13 mm of precipitation in a typical July.
- Record high
- 94°34° (2007)
- Record low
- 35°2° (2001)
- Heating degree days
- 142
- Cooling degree days
- 10
Sequim in August
Highs average 70°21° and lows 51°11°, with 0.56 in14 mm of precipitation in a typical August.
- Record high
- 93°34° (2025)
- Record low
- 33°1° (2001)
- Heating degree days
- 140
- Cooling degree days
- 8
Sequim in September
Highs average 66°19° and lows 46°8°, with 0.87 in22 mm of precipitation in a typical September.
- Record high
- 87°31° (2017)
- Record low
- 31°−1° (1983)
- Heating degree days
- 269
- Cooling degree days
- 1
Sequim in OctoberThis month
Highs average 58°14° and lows 40°4°, with 1.6 in41 mm of precipitation in a typical October.
- Record high
- 75°24° (2022)
- Record low
- 19°−7° (2002)
- Heating degree days
- 505
- Cooling degree days
- 0
Sequim in November
Highs average 50°10° and lows 35°1°, with 2.6 in67 mm of precipitation in a typical November.
- Record high
- 70°21° (1981)
- Record low
- 4°−16° (1985)
- Heating degree days
- 675
- Cooling degree days
- 0
Sequim in December
Highs average 46°8° and lows 32°0°, with 2.3 in57 mm of precipitation and 1.4 in3.6 cm of snow in a typical December.
- Record high
- 65°18° (2023)
- Record low
- −1°−18° (1985)
- Heating degree days
- 811
- Cooling degree days
- 0