San Fernando weather by month

The San Fernando Valley, nestled within Los Angeles County, enjoys a Mediterranean climate characterized by warm, dry summers and mild, wet winters. But “mild” doesn’t tell the whole story! The Valley’s weather can vary significantly throughout the year. This guide provides a detailed look at the San Fernando Valley weather by month, helping you plan your visits or simply prepare for what’s coming.

Overview of San Fernando Valley Climate

The San Fernando Valley benefits from its location, shielded by the Santa Susana Mountains to the north and the Santa Monica Mountains to the south. These mountains create a rain shadow effect, contributing to the Valley’s generally sunny disposition. Temperatures are typically warmer than coastal areas of Los Angeles, and humidity is generally low. The “June Gloom” phenomenon – a period of morning marine layer clouds – is common in late spring and early summer. Microclimates exist within the Valley, with areas closer to the mountains experiencing slightly cooler temperatures.

San Fernando Valley Weather by Month

Here’s a breakdown of what you can expect each month:

Month	Avg High (°F)	Avg Low (°F)	Rainfall (inches)	Humidity (%)	Typical Conditions
January	68	46	2.8	65	Cool, occasional rain
February	69	48	2.5	63	Mild, some showers
March	72	50	1.9	60	Warming, pleasant
April	76	54	0.8	57	Sunny, comfortable
May	80	58	0.4	55	Warm, dry, pleasant
June	84	62	0.2	52	Warm, "June Gloom"
July	88	66	0.1	50	Hot, sunny, dry
August	90	68	0.1	51	Hottest month
September	87	66	0.3	54	Warm, pleasant
October	81	60	1.1	58	Mild, sunny
November	74	52	1.8	62	Cool, increasing rain
December	68	46	2.2	64	Cool, occasional rain

Note: These are average temperatures and rainfall. Actual conditions can vary.

Spring (March – May): Blooming Beauty

Spring is arguably the most beautiful time to visit the San Fernando Valley. Temperatures rise steadily, wildflowers bloom, and the air is fresh. March can still see some rain, but April and May are typically dry and sunny. This is an excellent time for hiking, outdoor dining, and enjoying the Valley’s parks. Expect comfortable daytime temperatures and cool evenings.

Summer (June – August): Sun-Drenched Days

Summers in the San Fernando Valley are hot and dry. Temperatures frequently reach the high 80s and low 90s, with occasional heat waves pushing temperatures even higher. "June Gloom" can bring morning clouds, but these usually burn off by midday. This is the perfect time for pool days, outdoor concerts, and exploring the Valley’s many attractions. Stay hydrated and seek shade during the hottest parts of the day.

Autumn (September – November): Golden Hues & Pleasant Breezes

Autumn brings a welcome respite from the summer heat. Temperatures gradually cool down, and the Valley enjoys pleasant, sunny days. September and October are particularly beautiful, with golden foliage and comfortable temperatures ideal for outdoor activities. November sees an increase in rainfall, signaling the approach of winter.

Winter (December – February): Mild & Occasionally Wet

Winters in the San Fernando Valley are mild compared to many other parts of the country. Temperatures rarely drop below freezing, and snowfall is extremely rare. Rainfall is concentrated during these months, but even then, sunny days are common. This is a good time for hiking (avoiding muddy trails after rain) and enjoying indoor attractions.

Frequently Asked Questions (FAQ)

Q: What is the hottest month in the San Fernando Valley?
A: August is typically the hottest month, with average high temperatures around 90°F.

Q: Does it ever rain in the San Fernando Valley?
A: Yes, most of the rainfall occurs between November and March.

Q: What is "June Gloom"?
A: It’s a weather pattern where morning clouds linger along the coast and extend into the San Fernando Valley during late spring and early summer.

Q: Is the San Fernando Valley humid?
A: Generally, no. The Valley has relatively low humidity, especially during the summer months.

Q: What should I pack if I’m visiting in the winter?
A: Layers are key! Pack a light jacket, long sleeves, and comfortable walking shoes. An umbrella is also a good idea.