Basin City weather by month
What a typical year looks like in Basin City, Washington: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Sagemoor, 23 km from Basin City; records cover 2009–2026.
The year at a glance
- Precipitation a year
- 9.8 in248 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 30
- First fall freeze
- Oct 12
- Heating degree days
- 5,351
- Cooling degree days
- 621
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 101°38° (cooling, 1%).
Month by month
Basin City in January
Highs average 41°5° and lows 25°−4°, with 1.3 in32 mm of precipitation in a typical January.
- Record high
- 62°17° (2021)
- Record low
- −11°−24° (2017)
- Heating degree days
- 990
- Cooling degree days
- 0
Basin City in February
Highs average 48°9° and lows 27°−3°, with 0.87 in22 mm of precipitation in a typical February.
- Record high
- 69°21° (2022)
- Record low
- −7°−22° (2019)
- Heating degree days
- 771
- Cooling degree days
- 0
Basin City in March
Highs average 58°14° and lows 32°0°, with 1 in26 mm of precipitation in a typical March.
- Record high
- 82°28° (2025)
- Record low
- 4°−16° (2019)
- Heating degree days
- 630
- Cooling degree days
- 0
Basin City in April
Highs average 66°19° and lows 36°2°, with 0.78 in20 mm of precipitation in a typical April.
- Record high
- 90°32° (2016)
- Record low
- 20°−7° (2021)
- Heating degree days
- 422
- Cooling degree days
- 1
Basin City in May
Highs average 75°24° and lows 44°7°, with 0.83 in21 mm of precipitation in a typical May.
- Record high
- 98°37° (2023)
- Record low
- 25°−4° (2013)
- Heating degree days
- 200
- Cooling degree days
- 26
Basin City in June
Highs average 82°28° and lows 50°10°, with 0.76 in19 mm of precipitation in a typical June.
- Record high
- 112°44° (2021)
- Record low
- 37°3° (2024)
- Heating degree days
- 67
- Cooling degree days
- 91
Basin City in July
Highs average 90°32° and lows 55°13°, with 0.23 in5.8 mm of precipitation in a typical July.
- Record high
- 111°44° (2021)
- Record low
- 42°6° (2012)
- Heating degree days
- 8
- Cooling degree days
- 241
Basin City in August
Highs average 89°32° and lows 54°12°, with 0.27 in6.9 mm of precipitation in a typical August.
- Record high
- 106°41° (2022)
- Record low
- 40°4° (2023)
- Heating degree days
- 6
- Cooling degree days
- 210
Basin City in September
Highs average 80°27° and lows 47°8°, with 0.34 in8.6 mm of precipitation in a typical September.
- Record high
- 101°38° (2025)
- Record low
- 33°1° (2024)
- Heating degree days
- 98
- Cooling degree days
- 51
Basin City in OctoberThis month
Highs average 66°19° and lows 37°3°, with 0.92 in23 mm of precipitation in a typical October.
- Record high
- 92°33° (2021)
- Record low
- 13°−11° (2019)
- Heating degree days
- 420
- Cooling degree days
- 1
Basin City in November
Highs average 50°10° and lows 29°−2°, with 1.1 in27 mm of precipitation in a typical November.
- Record high
- 73°23° (2018)
- Record low
- −11°−24° (2010)
- Heating degree days
- 775
- Cooling degree days
- 0
Basin City in December
Highs average 40°5° and lows 27°−3°, with 1.4 in35 mm of precipitation in a typical December.
- Record high
- 67°19° (2025)
- Record low
- −8°−22° (2016)
- Heating degree days
- 964
- Cooling degree days
- 0