Healdsburg, CA climate
Healdsburg has mild winters and warm summers. A typical July afternoon reaches 85°, a January night drops to 38°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Healdsburg feels like
Winter
Spring
Summer
Fall
Healdsburg weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 58° | 38° | 8.0" | 0 | 14 | 0 | 45° – 54° |
| February | 62° | 40° | 7.8" | 0 | 12 | 0 | 46° – 57° |
| March | 66° | 41° | 5.8" | 0 | 12 | 0 | 47° – 59° |
| April | 70° | 43° | 2.7" | 0 | 8 | 0 | 51° – 60° |
| May | 76° | 47° | 1.5" | 0 | 5 | 0 | 56° – 67° |
| June | 82° | 51° | 0.3" | 0 | 1 | 0 | 63° – 69° |
| July | 85° | 52° | 0.0" | 0 | 0 | 0 | 66° – 72° |
| August | 85° | 52° | 0.0" | 0 | 0 | 0 | 66° – 72° |
| September | 84° | 50° | 0.1" | 0 | 1 | 0 | 64° – 71° |
| October | 77° | 46° | 1.8" | 0 | 4 | 0 | 58° – 68° |
| November | 66° | 41° | 4.1" | 0 | 8 | 0 | 47° – 57° |
| December | 58° | 38° | 8.5" | 0 | 13 | 0 | 44° – 52° |
| Year | 72° | 45° | 40.5" | 0.0" | 77 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Healdsburg
Healdsburg gets 41 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 77 days a year.
About 292 frost-free days a year
In half of years the last 32° night comes by February 15 and the first one by December 2. That leaves about 292 frost-free days for gardens, longer than 94% of U.S. towns.
Heating and cooling a home in Healdsburg
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Healdsburg, 76% of that work is heating and 24% is cooling.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Healdsburg compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Healdsburg averaged 1.5° warmer than the 1900s. The biggest change is in January (+2.1°). The shift is larger than in 69% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Healdsburg’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. March swings the most: between 1991 and 2020 its average temperature ranged from 47° to 59°. June is the most reliable, staying within 6°.
Common questions about Healdsburg’s climate
What is the coldest month in Healdsburg?
December, with a typical high of 58° and a low of 38°.
What is the hottest month in Healdsburg?
August, with a typical high of 85° and a low of 52°. About 58 days a year reach 90°.
How much snow does Healdsburg get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Healdsburg?
In half of years the first 32° night comes by December 2, and the last spring frost by February 15.
What is the rainiest month in Healdsburg?
December, with 8.5 inches of rain and melted snow. The year totals 41 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Healdsburg itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Healdsburg, CA (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.