Brooktrails weather by month
What a typical year looks like in Brooktrails, California: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Potter Valley Powerhouse, 25 km from Brooktrails; records cover 1937–2026.
The year at a glance
- Precipitation a year
- 45 in1144 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 10
- First fall freeze
- Nov 3
- Heating degree days
- 3,087
- Cooling degree days
- 946
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 24°−4° (heating, 99%) and 104°40° (cooling, 1%).
Month by month
Brooktrails in January
Highs average 57°14° and lows 35°2°, with 8.2 in209 mm of precipitation in a typical January.
- Record high
- 82°28° (1968)
- Record low
- 14°−10° (1949)
- Heating degree days
- 584
- Cooling degree days
- 0
Brooktrails in February
Highs average 61°16° and lows 36°2°, with 7.7 in196 mm of precipitation in a typical February.
- Record high
- 87°31° (1971)
- Record low
- 15°−9° (1939)
- Heating degree days
- 451
- Cooling degree days
- 0
Brooktrails in March
Highs average 66°19° and lows 39°4°, with 6.3 in160 mm of precipitation in a typical March.
- Record high
- 94°34° (2026)
- Record low
- 20°−7° (1953)
- Heating degree days
- 390
- Cooling degree days
- 0
Brooktrails in April
Highs average 71°22° and lows 41°5°, with 3.4 in85 mm of precipitation in a typical April.
- Record high
- 95°35° (2009)
- Record low
- 22°−6° (1999)
- Heating degree days
- 282
- Cooling degree days
- 5
Brooktrails in May
Highs average 79°26° and lows 45°7°, with 1.9 in47 mm of precipitation in a typical May.
- Record high
- 103°39° (2021)
- Record low
- 28°−2° (1964)
- Heating degree days
- 136
- Cooling degree days
- 43
Brooktrails in June
Highs average 87°31° and lows 50°10°, with 0.54 in14 mm of precipitation in a typical June.
- Record high
- 110°43° (1961)
- Record low
- 32°0° (1988)
- Heating degree days
- 38
- Cooling degree days
- 142
Brooktrails in July
Highs average 95°35° and lows 54°12°, with 0.04 in1 mm of precipitation in a typical July.
- Record high
- 113°45° (1972)
- Record low
- 38°3° (1963)
- Heating degree days
- 2
- Cooling degree days
- 303
Brooktrails in August
Highs average 94°35° and lows 53°12°, with 0.05 in1.3 mm of precipitation in a typical August.
- Record high
- 116°47° (1978)
- Record low
- 39°4° (1964)
- Heating degree days
- 3
- Cooling degree days
- 263
Brooktrails in September
Highs average 90°32° and lows 49°9°, with 0.3 in7.6 mm of precipitation in a typical September.
- Record high
- 113°45° (2022)
- Record low
- 33°1° (1950)
- Heating degree days
- 22
- Cooling degree days
- 157
Brooktrails in OctoberThis month
Highs average 79°26° and lows 43°6°, with 1.9 in47 mm of precipitation in a typical October.
- Record high
- 103°39° (1980)
- Record low
- 21°−6° (1971)
- Heating degree days
- 154
- Cooling degree days
- 33
Brooktrails in November
Highs average 64°18° and lows 38°3°, with 5 in128 mm of precipitation in a typical November.
- Record high
- 93°34° (1966)
- Record low
- 19°−7° (1961)
- Heating degree days
- 413
- Cooling degree days
- 0
Brooktrails in December
Highs average 56°13° and lows 35°1°, with 9.8 in248 mm of precipitation in a typical December.
- Record high
- 83°28° (1980)
- Record low
- 12°−11° (1990)
- Heating degree days
- 612
- Cooling degree days
- 0