Steilacoom weather by month
What a typical year looks like in Steilacoom, Washington: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at TACOMA NO. 1, 16 km from Steilacoom; records cover 1982–2026.
The year at a glance
- Precipitation a year
- 40.8 in1037 mm
- Snow a year
- Rare
- Last spring freeze
- Mar 5
- First fall freeze
- Nov 13
- Heating degree days
- 4,332
- Cooling degree days
- 211
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 87°31° (cooling, 1%).
Month by month
Steilacoom in January
Highs average 48°9° and lows 37°3°, with 6 in153 mm of precipitation in a typical January.
- Record high
- 66°19° (2005)
- Record low
- 16°−9° (2024)
- Heating degree days
- 690
- Cooling degree days
- 0
Steilacoom in February
Highs average 50°10° and lows 37°3°, with 4 in102 mm of precipitation in a typical February.
- Record high
- 68°20° (1986)
- Record low
- 11°−12° (1989)
- Heating degree days
- 592
- Cooling degree days
- 0
Steilacoom in March
Highs average 55°13° and lows 40°5°, with 4.4 in111 mm of precipitation in a typical March.
- Record high
- 77°25° (2004)
- Record low
- 15°−9° (1989)
- Heating degree days
- 546
- Cooling degree days
- 0
Steilacoom in April
Highs average 60°15° and lows 44°7°, with 3.4 in86 mm of precipitation in a typical April.
- Record high
- 83°28° (2016)
- Record low
- 29°−2° (1982)
- Heating degree days
- 398
- Cooling degree days
- 0
Steilacoom in May
Highs average 67°19° and lows 49°10°, with 2 in51 mm of precipitation in a typical May.
- Record high
- 92°33° (1983)
- Record low
- 34°1° (1982)
- Heating degree days
- 229
- Cooling degree days
- 6
Steilacoom in June
Highs average 71°22° and lows 53°12°, with 1.4 in36 mm of precipitation in a typical June.
- Record high
- 105°41° (2021)
- Record low
- 37°3° (1982)
- Heating degree days
- 106
- Cooling degree days
- 24
Steilacoom in July
Highs average 77°25° and lows 57°14°, with 0.55 in14 mm of precipitation in a typical July.
- Record high
- 94°34° (2004)
- Record low
- 46°8° (2009)
- Heating degree days
- 22
- Cooling degree days
- 84
Steilacoom in August
Highs average 77°25° and lows 57°14°, with 0.83 in21 mm of precipitation in a typical August.
- Record high
- 96°36° (2020)
- Record low
- 41°5° (1984)
- Heating degree days
- 20
- Cooling degree days
- 81
Steilacoom in September
Highs average 71°22° and lows 53°12°, with 1.6 in40 mm of precipitation in a typical September.
- Record high
- 89°32° (1987)
- Record low
- 34°1° (1983)
- Heating degree days
- 111
- Cooling degree days
- 16
Steilacoom in OctoberThis month
Highs average 61°16° and lows 47°8°, with 4.1 in104 mm of precipitation in a typical October.
- Record high
- 82°28° (1991)
- Record low
- 26°−3° (2002)
- Heating degree days
- 352
- Cooling degree days
- 0
Steilacoom in November
Highs average 52°11° and lows 41°5°, with 6.5 in165 mm of precipitation in a typical November.
- Record high
- 70°21° (1999)
- Record low
- 5°−15° (1985)
- Heating degree days
- 556
- Cooling degree days
- 0
Steilacoom in December
Highs average 47°8° and lows 37°3°, with 6 in153 mm of precipitation in a typical December.
- Record high
- 68°20° (1993)
- Record low
- 6°−14° (1983)
- Heating degree days
- 710
- Cooling degree days
- 0