Sunnyslope weather by month
What a typical year looks like in Sunnyslope, Washington: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Wenatchee Pangborn Memorial Airport, 17 km from Sunnyslope; records cover 1959–2026.
The year at a glance
- Precipitation a year
- 7.8 in199 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 8
- First fall freeze
- Oct 21
- Heating degree days
- 5,814
- Cooling degree days
- 807
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 8°−13° (heating, 99%) and 100°38° (cooling, 1%).
Month by month
Sunnyslope in January
Highs average 34°1° and lows 24°−4°, with 1 in26 mm of precipitation in a typical January.
- Record high
- 60°16° (1971)
- Record low
- −12°−24° (1996)
- Heating degree days
- 1121
- Cooling degree days
- 0
Sunnyslope in February
Highs average 42°5° and lows 27°−3°, with 0.76 in19 mm of precipitation in a typical February.
- Record high
- 65°18° (1988)
- Record low
- −15°−26° (1996)
- Heating degree days
- 854
- Cooling degree days
- 0
Sunnyslope in March
Highs average 53°11° and lows 34°1°, with 0.73 in19 mm of precipitation in a typical March.
- Record high
- 78°26° (1992)
- Record low
- 4°−16° (2019)
- Heating degree days
- 679
- Cooling degree days
- 0
Sunnyslope in April
Highs average 62°17° and lows 40°5°, with 0.57 in14 mm of precipitation in a typical April.
- Record high
- 93°34° (1977)
- Record low
- 23°−5° (2022)
- Heating degree days
- 418
- Cooling degree days
- 2
Sunnyslope in May
Highs average 72°22° and lows 49°9°, with 0.77 in20 mm of precipitation in a typical May.
- Record high
- 103°39° (1986)
- Record low
- 32°0° (1962)
- Heating degree days
- 186
- Cooling degree days
- 36
Sunnyslope in June
Highs average 78°26° and lows 55°13°, with 0.5 in13 mm of precipitation in a typical June.
- Record high
- 114°46° (2021)
- Record low
- 38°3° (1976)
- Heating degree days
- 58
- Cooling degree days
- 105
Sunnyslope in July
Highs average 88°31° and lows 62°17°, with 0.24 in6.1 mm of precipitation in a typical July.
- Record high
- 109°43° (2022)
- Record low
- 43°6° (1962)
- Heating degree days
- 6
- Cooling degree days
- 306
Sunnyslope in August
Highs average 86°30° and lows 61°16°, with 0.23 in5.8 mm of precipitation in a typical August.
- Record high
- 109°43° (1961)
- Record low
- 42°6° (1992)
- Heating degree days
- 7
- Cooling degree days
- 277
Sunnyslope in September
Highs average 77°25° and lows 53°11°, with 0.23 in5.8 mm of precipitation in a typical September.
- Record high
- 101°38° (1987)
- Record low
- 31°−1° (1985)
- Heating degree days
- 91
- Cooling degree days
- 79
Sunnyslope in OctoberThis month
Highs average 61°16° and lows 41°5°, with 0.62 in16 mm of precipitation in a typical October.
- Record high
- 90°32° (2014)
- Record low
- 15°−9° (2002)
- Heating degree days
- 446
- Cooling degree days
- 2
Sunnyslope in November
Highs average 44°7° and lows 31°−1°, with 0.85 in22 mm of precipitation in a typical November.
- Record high
- 70°21° (1975)
- Record low
- −5°−21° (1985)
- Heating degree days
- 830
- Cooling degree days
- 0
Sunnyslope in December
Highs average 33°1° and lows 25°−4°, with 1.3 in33 mm of precipitation in a typical December.
- Record high
- 70°21° (2021)
- Record low
- −21°−29° (1968)
- Heating degree days
- 1118
- Cooling degree days
- 0