San Fernando weather by month
What a typical year looks like in San Fernando, California: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Burbank Glendale Pasadena Airport, 12 km from San Fernando; records cover 1939–2026.
The year at a glance
- Precipitation a year
- 13.9 in353 mm
- Snow a year
- Rare
- Last spring freeze
- Jan 13
- First fall freeze
- Dec 22
- Heating degree days
- 1,400
- Cooling degree days
- 1,481
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 36°2° (heating, 99%) and 101°38° (cooling, 1%).
Month by month
San Fernando in January
Highs average 67°19° and lows 45°7°, with 3 in75 mm of precipitation in a typical January.
- Record high
- 92°33° (1971)
- Record low
- 22°−6° (1979)
- Heating degree days
- 279
- Cooling degree days
- 5
San Fernando in February
Highs average 67°19° and lows 46°8°, with 4 in100 mm of precipitation in a typical February.
- Record high
- 94°34° (2026)
- Record low
- 27°−3° (1942)
- Heating degree days
- 242
- Cooling degree days
- 6
San Fernando in March
Highs average 70°21° and lows 49°9°, with 2.4 in62 mm of precipitation in a typical March.
- Record high
- 99°37° (2026)
- Record low
- 23°−5° (1985)
- Heating degree days
- 195
- Cooling degree days
- 17
San Fernando in April
Highs average 73°23° and lows 52°11°, with 0.74 in19 mm of precipitation in a typical April.
- Record high
- 105°41° (1989)
- Record low
- 32°0° (1978)
- Heating degree days
- 124
- Cooling degree days
- 43
San Fernando in May
Highs average 76°24° and lows 57°14°, with 0.29 in7.4 mm of precipitation in a typical May.
- Record high
- 107°42° (1984)
- Record low
- 39°4° (1975)
- Heating degree days
- 52
- Cooling degree days
- 85
San Fernando in June
Highs average 80°27° and lows 60°16°, with 0.09 in2.3 mm of precipitation in a typical June.
- Record high
- 111°44° (1976)
- Record low
- 43°6° (1943)
- Heating degree days
- 8
- Cooling degree days
- 161
San Fernando in July
Highs average 87°30° and lows 65°18°, with 0.01 in0.3 mm of precipitation in a typical July.
- Record high
- 114°46° (2018)
- Record low
- 45°7° (1979)
- Heating degree days
- 0
- Cooling degree days
- 328
San Fernando in August
Highs average 89°32° and lows 65°18°, with 0.01 in0.3 mm of precipitation in a typical August.
- Record high
- 112°44° (2022)
- Record low
- 46°8° (1975)
- Heating degree days
- 0
- Cooling degree days
- 369
San Fernando in September
Highs average 87°30° and lows 63°17°, with 0.11 in2.8 mm of precipitation in a typical September.
- Record high
- 114°46° (2020)
- Record low
- 43°6° (1941)
- Heating degree days
- 2
- Cooling degree days
- 295
San Fernando in OctoberThis month
Highs average 79°26° and lows 58°14°, with 0.6 in15 mm of precipitation in a typical October.
- Record high
- 108°42° (1980)
- Record low
- 33°1° (1971)
- Heating degree days
- 34
- Cooling degree days
- 141
San Fernando in November
Highs average 73°23° and lows 49°9°, with 0.69 in18 mm of precipitation in a typical November.
- Record high
- 98°37° (1976)
- Record low
- 29°−2° (1975)
- Heating degree days
- 157
- Cooling degree days
- 29
San Fernando in December
Highs average 66°19° and lows 44°7°, with 2 in51 mm of precipitation in a typical December.
- Record high
- 92°33° (1958)
- Record low
- 22°−6° (1978)
- Heating degree days
- 307
- Cooling degree days
- 2