Chelan weather by month
What a typical year looks like in Chelan, Washington: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Chelan, 2 km from Chelan; records cover 1891–2026.
The year at a glance
- Precipitation a year
- 12 in304 mm
- Snow a year
- 21 in52 cm
- Last spring freeze
- Apr 3
- First fall freeze
- Oct 30
- Heating degree days
- 6,036
- Cooling degree days
- 653
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 9°−13° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
Chelan in January
Highs average 34°1° and lows 22°−6°, with 1.5 in39 mm of precipitation and 8 in20 cm of snow in a typical January.
- Record high
- 62°17° (1989)
- Record low
- −18°−28° (1893)
- Heating degree days
- 1148
- Cooling degree days
- 0
Chelan in February
Highs average 42°5° and lows 24°−4°, with 1.2 in31 mm of precipitation and 2 in5.1 cm of snow in a typical February.
- Record high
- 63°17° (1977)
- Record low
- −15°−26° (1893)
- Heating degree days
- 896
- Cooling degree days
- 0
Chelan in March
Highs average 52°11° and lows 30°−1°, with 1.1 in28 mm of precipitation and 0.7 in1.8 cm of snow in a typical March.
- Record high
- 74°23° (1911)
- Record low
- 4°−16° (1955)
- Heating degree days
- 741
- Cooling degree days
- 0
Chelan in April
Highs average 62°17° and lows 38°3°, with 0.75 in19 mm of precipitation in a typical April.
- Record high
- 88°31° (1977)
- Record low
- 21°−6° (2021)
- Heating degree days
- 456
- Cooling degree days
- 0
Chelan in May
Highs average 72°22° and lows 46°8°, with 1.1 in27 mm of precipitation in a typical May.
- Record high
- 98°37° (2006)
- Record low
- 28°−2° (1954)
- Heating degree days
- 207
- Cooling degree days
- 22
Chelan in June
Highs average 78°26° and lows 53°12°, with 0.87 in22 mm of precipitation in a typical June.
- Record high
- 111°44° (2021)
- Record low
- 33°1° (1983)
- Heating degree days
- 67
- Cooling degree days
- 81
Chelan in July
Highs average 87°30° and lows 59°15°, with 0.42 in11 mm of precipitation in a typical July.
- Record high
- 109°43° (2021)
- Record low
- 35°2° (1936)
- Heating degree days
- 9
- Cooling degree days
- 253
Chelan in August
Highs average 87°31° and lows 58°15°, with 0.32 in8.1 mm of precipitation in a typical August.
- Record high
- 106°41° (2021)
- Record low
- 42°6° (1910)
- Heating degree days
- 9
- Cooling degree days
- 243
Chelan in September
Highs average 77°25° and lows 49°10°, with 0.34 in8.6 mm of precipitation in a typical September.
- Record high
- 97°36° (1974)
- Record low
- 26°−3° (1983)
- Heating degree days
- 107
- Cooling degree days
- 53
Chelan in OctoberThis month
Highs average 62°17° and lows 39°4°, with 1 in26 mm of precipitation in a typical October.
- Record high
- 88°31° (2003)
- Record low
- 3°−16° (1984)
- Heating degree days
- 450
- Cooling degree days
- 1
Chelan in November
Highs average 46°8° and lows 30°−1°, with 1.5 in38 mm of precipitation and 1.4 in3.6 cm of snow in a typical November.
- Record high
- 72°22° (1967)
- Record low
- −3°−19° (1896)
- Heating degree days
- 822
- Cooling degree days
- 0
Chelan in December
Highs average 35°2° and lows 23°−5°, with 1.8 in46 mm of precipitation and 9 in22 cm of snow in a typical December.
- Record high
- 69°21° (2021)
- Record low
- −18°−28° (1968)
- Heating degree days
- 1124
- Cooling degree days
- 0