Lake Marcel-Stillwater weather by month
What a typical year looks like in Lake Marcel-Stillwater, Washington: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Startup 1 E, 24 km from Lake Marcel-Stillwater; records cover 1924–2026.
The year at a glance
- Precipitation a year
- 68.3 in1735 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 14
- First fall freeze
- Oct 26
- Heating degree days
- 5,023
- Cooling degree days
- 146
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 21°−6° (heating, 99%) and 91°33° (cooling, 1%).
Month by month
Lake Marcel-Stillwater in January
Highs average 47°9° and lows 34°1°, with 8.9 in227 mm of precipitation in a typical January.
- Record high
- 68°20° (2005)
- Record low
- −8°−22° (1950)
- Heating degree days
- 753
- Cooling degree days
- 0
Lake Marcel-Stillwater in February
Highs average 51°10° and lows 34°1°, with 5.9 in150 mm of precipitation in a typical February.
- Record high
- 77°25° (1968)
- Record low
- −4°−20° (1950)
- Heating degree days
- 634
- Cooling degree days
- 0
Lake Marcel-Stillwater in March
Highs average 55°13° and lows 36°2°, with 6.8 in172 mm of precipitation in a typical March.
- Record high
- 83°28° (1928)
- Record low
- 6°−14° (1955)
- Heating degree days
- 608
- Cooling degree days
- 0
Lake Marcel-Stillwater in April
Highs average 60°16° and lows 39°4°, with 5.9 in149 mm of precipitation in a typical April.
- Record high
- 90°32° (1926)
- Record low
- 17°−8° (1982)
- Heating degree days
- 463
- Cooling degree days
- 1
Lake Marcel-Stillwater in May
Highs average 67°19° and lows 44°7°, with 5 in126 mm of precipitation in a typical May.
- Record high
- 102°39° (1983)
- Record low
- 27°−3° (1965)
- Heating degree days
- 301
- Cooling degree days
- 6
Lake Marcel-Stillwater in June
Highs average 71°22° and lows 49°9°, with 3.8 in98 mm of precipitation in a typical June.
- Record high
- 106°41° (1925)
- Record low
- 31°−1° (1976)
- Heating degree days
- 174
- Cooling degree days
- 17
Lake Marcel-Stillwater in July
Highs average 78°25° and lows 52°11°, with 1.5 in38 mm of precipitation in a typical July.
- Record high
- 104°40° (2009)
- Record low
- 35°2° (1952)
- Heating degree days
- 67
- Cooling degree days
- 54
Lake Marcel-Stillwater in August
Highs average 78°26° and lows 51°11°, with 1.7 in43 mm of precipitation in a typical August.
- Record high
- 100°38° (1960)
- Record low
- 36°2° (1929)
- Heating degree days
- 58
- Cooling degree days
- 55
Lake Marcel-Stillwater in September
Highs average 73°23° and lows 47°8°, with 3.5 in89 mm of precipitation in a typical September.
- Record high
- 98°37° (1944)
- Record low
- 25°−4° (2005)
- Heating degree days
- 166
- Cooling degree days
- 13
Lake Marcel-Stillwater in OctoberThis month
Highs average 62°17° and lows 42°5°, with 7.1 in181 mm of precipitation in a typical October.
- Record high
- 92°33° (1987)
- Record low
- 17°−8° (2023)
- Heating degree days
- 414
- Cooling degree days
- 0
Lake Marcel-Stillwater in November
Highs average 52°11° and lows 37°3°, with 9.8 in249 mm of precipitation in a typical November.
- Record high
- 78°26° (1949)
- Record low
- 4°−16° (1955)
- Heating degree days
- 612
- Cooling degree days
- 0
Lake Marcel-Stillwater in December
Highs average 47°8° and lows 34°1°, with 8.4 in214 mm of precipitation in a typical December.
- Record high
- 67°19° (1980)
- Record low
- 3°−16° (1964)
- Heating degree days
- 773
- Cooling degree days
- 0