San Simeon, CA climate
San Simeon has warm winters and cool summers, with very little rain. A typical July afternoon reaches 71°, a January night drops to 45°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in San Simeon feels like
Winter
Spring
Summer
Fall
San Simeon 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 | 62° | 45° | 4.8" | 0 | 8 | 0 | 49° – 58° |
| February | 62° | 45° | 4.4" | 0 | 9 | 0 | 49° – 58° |
| March | 63° | 45° | 3.6" | 0 | 7 | 0 | 48° – 60° |
| April | 64° | 47° | 1.3" | 0 | 5 | 0 | 51° – 60° |
| May | 66° | 48° | 0.5" | 0 | 2 | 0 | 53° – 63° |
| June | 69° | 50° | 0.1" | 0 | 0 | 0 | 55° – 64° |
| July | 71° | 53° | 0.0" | 0 | 0 | 0 | 59° – 67° |
| August | 72° | 53° | 0.0" | 0 | 0 | 0 | 59° – 66° |
| September | 72° | 53° | 0.1" | 0 | 1 | 0 | 59° – 66° |
| October | 70° | 51° | 0.8" | 0 | 3 | 0 | 57° – 66° |
| November | 66° | 47° | 1.7" | 0 | 5 | 0 | 49° – 60° |
| December | 61° | 44° | 4.1" | 0 | 8 | 0 | 49° – 57° |
| Year | 66° | 48° | 21.3" | 0.0" | 49 | 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 San Simeon
San Simeon gets 21 inches of rain and melted snow a year. January is the wettest month and July the driest. Rain or snow falls on about 49 days a year.
A year-round growing season
Heating and cooling a home in San Simeon
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In San Simeon, 77% of that work is heating and 23% 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 San Simeon 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 San Simeon averaged 1.7° warmer than the 1900s. The biggest change is in January (+2.4°). The shift is larger than in 82% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at San Simeon’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 48° to 60°. September is the most reliable, staying within 7°.
Common questions about San Simeon’s climate
What is the coldest month in San Simeon?
December, with a typical high of 61° and a low of 44°.
What is the hottest month in San Simeon?
August, with a typical high of 72° and a low of 53°. About 15 days a year reach 90°.
How much snow does San Simeon get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in San Simeon?
Frost is uncommon. Only 40% of years see a night at 32° or below.
What is the rainiest month in San Simeon?
January, with 4.8 inches of rain and melted snow. The year totals 21 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for San Simeon itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Hearst Castle, CA (5 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.