Sea Ranch, CA climate
Sea Ranch has warm winters and cool summers. A typical July afternoon reaches 67°, a January night drops to 43°.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Sea Ranch feels like
Winter
Spring
Summer
Fall
Sea Ranch weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 57° | 43° | 7.5" | 47° – 56° |
| February | 58° | 44° | 7.2" | 46° – 57° |
| March | 59° | 44° | 5.8" | 46° – 58° |
| April | 60° | 45° | 2.9" | 47° – 56° |
| May | 63° | 47° | 1.2" | 50° – 59° |
| June | 66° | 50° | 0.4" | 54° – 62° |
| July | 67° | 51° | 0.0" | 56° – 62° |
| August | 68° | 52° | 0.0" | 57° – 64° |
| September | 68° | 51° | 0.2" | 56° – 63° |
| October | 66° | 49° | 1.8" | 54° – 64° |
| November | 61° | 45° | 4.1" | 46° – 56° |
| December | 57° | 43° | 8.3" | 47° – 54° |
| Year | 62° | 47° | 39.4" |
“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 Sea Ranch
Sea Ranch gets 39 inches of rain and melted snow a year. December is the wettest month and July the driest.
A year-round growing season
Heating and cooling a home in Sea Ranch
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Sea Ranch, 100% of that work is heating and 0% is cooling, so the furnace matters far more than the air conditioner.
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 Sea Ranch 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 Sea Ranch averaged 1.2° warmer than the 1900s. The biggest change is in January (+1.8°). The shift is smaller than in 55% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Sea Ranch’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 46° to 58°. July is the most reliable, staying within 6°.
Common questions about Sea Ranch’s climate
What is the coldest month in Sea Ranch?
December, with a typical high of 57° and a low of 43°.
What is the hottest month in Sea Ranch?
August, with a typical high of 68° and a low of 52°.
When is the first frost in Sea Ranch?
Frost is uncommon. Only 87% of years see a night at 32° or below.
What is the rainiest month in Sea Ranch?
December, with 8.3 inches of rain and melted snow. The year totals 39 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Sea Ranch itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Ft Ross, CA (19 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.