Happy Valley weather by month
What a typical year looks like in Happy Valley, California: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Redding Airport, 12 km from Happy Valley; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 33.5 in851 mm
- Snow a year
- 2.6 in6.6 cm
- Last spring freeze
- Mar 5
- First fall freeze
- Nov 16
- Heating degree days
- 2,574
- Cooling degree days
- 2,030
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 26°−3° (heating, 99%) and 109°43° (cooling, 1%).
Month by month
Happy Valley in January
Highs average 57°14° and lows 38°3°, with 6 in153 mm of precipitation and 1.1 in2.8 cm of snow in a typical January.
- Record high
- 87°31° (1920)
- Record low
- 16°−9° (2012)
- Heating degree days
- 544
- Cooling degree days
- 0
Happy Valley in February
Highs average 61°16° and lows 40°5°, with 5.5 in139 mm of precipitation and 0.8 in2 cm of snow in a typical February.
- Record high
- 87°31° (1920)
- Record low
- 20°−7° (1903)
- Heating degree days
- 405
- Cooling degree days
- 0
Happy Valley in March
Highs average 66°19° and lows 43°6°, with 4.6 in117 mm of precipitation in a typical March.
- Record high
- 93°34° (1914)
- Record low
- 27°−3° (1896)
- Heating degree days
- 331
- Cooling degree days
- 4
Happy Valley in April
Highs average 72°22° and lows 47°8°, with 2.4 in61 mm of precipitation in a typical April.
- Record high
- 98°37° (1926)
- Record low
- 28°−2° (1999)
- Heating degree days
- 195
- Cooling degree days
- 27
Happy Valley in May
Highs average 82°28° and lows 54°12°, with 1.8 in46 mm of precipitation in a typical May.
- Record high
- 109°43° (2021)
- Record low
- 31°−1° (1948)
- Heating degree days
- 60
- Cooling degree days
- 158
Happy Valley in June
Highs average 92°33° and lows 62°17°, with 0.75 in19 mm of precipitation in a typical June.
- Record high
- 117°47° (2006)
- Record low
- 38°3° (1952)
- Heating degree days
- 7
- Cooling degree days
- 372
Happy Valley in July
Highs average 100°38° and lows 67°19°, with 0.07 in1.8 mm of precipitation in a typical July.
- Record high
- 119°48° (2024)
- Record low
- 48°9° (1983)
- Heating degree days
- 0
- Cooling degree days
- 572
Happy Valley in August
Highs average 98°37° and lows 64°18°, with 0.13 in3.3 mm of precipitation in a typical August.
- Record high
- 118°48° (1971)
- Record low
- 44°7° (1984)
- Heating degree days
- 0
- Cooling degree days
- 496
Happy Valley in September
Highs average 92°34° and lows 58°15°, with 0.45 in11 mm of precipitation in a typical September.
- Record high
- 116°47° (1988)
- Record low
- 39°4° (1947)
- Heating degree days
- 5
- Cooling degree days
- 312
Happy Valley in OctoberThis month
Highs average 79°26° and lows 50°10°, with 1.9 in49 mm of precipitation in a typical October.
- Record high
- 106°41° (1917)
- Record low
- 29°−2° (1935)
- Heating degree days
- 93
- Cooling degree days
- 87
Happy Valley in November
Highs average 64°18° and lows 42°5°, with 3.5 in90 mm of precipitation in a typical November.
- Record high
- 99°37° (1927)
- Record low
- 21°−6° (1985)
- Heating degree days
- 364
- Cooling degree days
- 2
Happy Valley in December
Highs average 56°13° and lows 37°3°, with 6.3 in160 mm of precipitation and 0.7 in1.8 cm of snow in a typical December.
- Record high
- 83°28° (2021)
- Record low
- 16°−9° (2009)
- Heating degree days
- 570
- Cooling degree days
- 0