San Fernando, CA climate
San Fernando has warm winters and warm summers, with very little rain. A typical July afternoon reaches 90°, a January night drops to 44°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in San Fernando feels like
Winter
Spring
Summer
Fall
San Fernando 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 | 67° | 44° | 3.8" | 0 | 7 | 0 | 51° – 62° |
| February | 68° | 44° | 4.2" | 0 | 7 | 0 | 49° – 64° |
| March | 70° | 46° | 2.7" | 0 | 6 | 0 | 51° – 66° |
| April | 74° | 48° | 0.8" | 0 | 3 | 0 | 56° – 65° |
| May | 78° | 52° | 0.3" | 0 | 3 | 0 | 58° – 71° |
| June | 84° | 57° | 0.1" | 0 | 1 | 0 | 65° – 75° |
| July | 90° | 61° | 0.0" | 0 | 0 | 0 | 73° – 81° |
| August | 91° | 62° | 0.0" | 0 | 0 | 0 | 74° – 80° |
| September | 89° | 59° | 0.1" | 0 | 1 | 0 | 69° – 78° |
| October | 81° | 53° | 0.7" | 0 | 2 | 0 | 63° – 73° |
| November | 73° | 47° | 1.0" | 0 | 3 | 0 | 53° – 64° |
| December | 66° | 43° | 2.6" | 0 | 6 | 0 | 50° – 61° |
| Year | 77° | 51° | 16.4" | 0.0" | 39 | 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 Fernando
San Fernando gets 16 inches of rain and melted snow a year. February is the wettest month and August the driest. Rain or snow falls on about 39 days a year.
A year-round growing season
Heating and cooling a home in San Fernando
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In San Fernando, 43% of that work is heating and 57% 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 Fernando 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 Fernando averaged 2.4° warmer than the 1900s. The biggest change is in January (+3.4°). The shift is larger than in 100% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at San Fernando’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 51° to 66°. August is the most reliable, staying within 7°.
Common questions about San Fernando’s climate
What is the coldest month in San Fernando?
December, with a typical high of 66° and a low of 43°.
What is the hottest month in San Fernando?
August, with a typical high of 91° and a low of 62°. About 76 days a year reach 90°.
How much snow does San Fernando get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in San Fernando?
Frost is uncommon. Only 18% of years see a night at 32° or below.
What is the rainiest month in San Fernando?
February, with 4.2 inches of rain and melted snow. The year totals 16 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for San Fernando itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Pacoima Dam Fc33a-e, CA (3 mi, snow) and Northridge Cal State, CA (6 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.