Healdsburg weather by month
What a typical year looks like in Healdsburg, California: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at HEALDSBURG, 1 km from Healdsburg; records cover 1897–2026.
The year at a glance
- Precipitation a year
- 42.8 in1087 mm
- Snow a year
- Rare
- Last spring freeze
- Feb 19
- First fall freeze
- Nov 29
- Heating degree days
- 2,523
- Cooling degree days
- 780
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 29°−2° (heating, 99%) and 103°39° (cooling, 1%).
Month by month
Healdsburg in January
Highs average 58°14° and lows 39°4°, with 8 in203 mm of precipitation in a typical January.
- Record high
- 85°29° (1962)
- Record low
- 18°−8° (1937)
- Heating degree days
- 512
- Cooling degree days
- 0
Healdsburg in February
Highs average 62°16° and lows 41°5°, with 8.3 in212 mm of precipitation in a typical February.
- Record high
- 88°31° (1926)
- Record low
- 21°−6° (1903)
- Heating degree days
- 385
- Cooling degree days
- 0
Healdsburg in March
Highs average 66°19° and lows 43°6°, with 6.4 in161 mm of precipitation in a typical March.
- Record high
- 95°35° (1914)
- Record low
- 27°−3° (1918)
- Heating degree days
- 332
- Cooling degree days
- 1
Healdsburg in April
Highs average 72°22° and lows 45°7°, with 2.9 in73 mm of precipitation in a typical April.
- Record high
- 102°39° (1908)
- Record low
- 24°−4° (1901)
- Heating degree days
- 203
- Cooling degree days
- 11
Healdsburg in May
Highs average 79°26° and lows 50°10°, with 1.6 in41 mm of precipitation in a typical May.
- Record high
- 108°42° (1912)
- Record low
- 30°−1° (1899)
- Heating degree days
- 84
- Cooling degree days
- 60
Healdsburg in June
Highs average 86°30° and lows 54°12°, with 0.35 in8.9 mm of precipitation in a typical June.
- Record high
- 116°47° (1912)
- Record low
- 32°0° (1920)
- Heating degree days
- 15
- Cooling degree days
- 158
Healdsburg in July
Highs average 89°32° and lows 54°12°, with 0 in0 mm of precipitation in a typical July.
- Record high
- 116°47° (1905)
- Record low
- 31°−1° (1921)
- Heating degree days
- 2
- Cooling degree days
- 204
Healdsburg in August
Highs average 88°31° and lows 54°12°, with 0.04 in1 mm of precipitation in a typical August.
- Record high
- 114°46° (1913)
- Record low
- 33°1° (1925)
- Heating degree days
- 2
- Cooling degree days
- 188
Healdsburg in September
Highs average 85°29° and lows 52°11°, with 0.1 in2.5 mm of precipitation in a typical September.
- Record high
- 117°47° (2022)
- Record low
- 30°−1° (1901)
- Heating degree days
- 15
- Cooling degree days
- 119
Healdsburg in OctoberThis month
Highs average 77°25° and lows 49°9°, with 2.2 in56 mm of precipitation in a typical October.
- Record high
- 108°42° (1980)
- Record low
- 26°−3° (1946)
- Heating degree days
- 109
- Cooling degree days
- 38
Healdsburg in November
Highs average 65°18° and lows 43°6°, with 4.5 in113 mm of precipitation in a typical November.
- Record high
- 98°37° (1906)
- Record low
- 25°−4° (1898)
- Heating degree days
- 337
- Cooling degree days
- 1
Healdsburg in December
Highs average 57°14° and lows 39°4°, with 8.5 in216 mm of precipitation in a typical December.
- Record high
- 83°28° (1967)
- Record low
- 14°−10° (1990)
- Heating degree days
- 527
- Cooling degree days
- 0