California weather by month
Introduction
California’s weather is as diverse as its landscapes—from sun‑blasted beaches to snow‑capped mountains. Knowing what to expect each month can help you plan outdoor adventures, travel bookings, or everyday wardrobe choices. This guide breaks down the state’s climate by month, complete with averages, precipitation, and handy weather tips.
California Weather by Month: A Quick Reference
| Month | Avg Low (°F) | Avg High (°F) | Avg Rainfall (in) | Typical Weather |
|---|---|---|---|---|
| January | 45–48 | 58–63 | 3.6–5.2 | Cool, wet in Sierra, mild on the coast |
| February | 46–49 | 60–64 | 3.0–4.5 | Similar to January, start of dry season in Central Coast |
| March | 47–51 | 63–67 | 2.5–3.8 | Pleasant, rain tapers, first wildflowers |
| April | 49–54 | 68–73 | 2.0–3.5 | Warm, dry, ideal for beach trips |
| May | 55–60 | 75–82 | 1.5–2.5 | Hot, dry, summer crowds begin |
| June | 58–65 | 78–86 | 0.4–1.0 | Warmest month, beach season peak |
| July | 61–70 | 81–89 | 0.1–0.5 | Hot, almost no rain, best for outdoor festivals |
| August | 63–73 | 83–91 | 0.2–0.6 | Still hot, perfect for hiking and surfing |
| September | 62–70 | 79–87 | 0.3–0.7 | Cool evenings, early rain returns |
| October | 57–65 | 71–79 | 0.8–1.5 | Mild, higher humidity, grape harvest in Central Valley |
| November | 51–58 | 63–72 | 1.2–2.3 | Cooler, increasing rain, first snow in high Sierra |
| December | 46–53 | 59–66 | 2.0–3.2 | Cooler, rainy in north, sunny in southern beaches |
Note: Averages vary by region—Sierra Nevada, coastal cities, and inland valleys each have their own microclimates.
January: Winter’s Chill and Coastal Calm
- Coastal San Diego: Mild, 45–55 °F day and 30–35 °F night. Occasional fog rolls in from the Pacific.
- San Francisco Bay: Temperatures hover around 45 °F. Fog can make it feel cooler; rain is common.
- Sierra Nevada: Highs stay below 50 °F, lows drop to freezing; snow is plentiful in alpine zones.
Tip: Pack a lightweight jacket for the evenings, especially near the coast.
February: Transition Month
- More sunshine in Central California.
- Northern areas still show rain; Bay Area starts its “winter lull.”
- Wildflower bloom begins in the foothills.
Tip: Ideal for hiking in the desert – daylight hours are longer and temperatures are more comfortable.
March: Warmth Begins to Arrive
- Coastal temperatures rise: 55–65 °F day, 40–45 °F night.
- Rainfall steadily decreases across the state.
- Southern cities feel the first hint of spring.
Tip: Great for beachside exploration; layers help manage changing temperatures at night.
April: Full Bloom & Dry Spell
- California’s famed “April showers” taper off by mid‑month.
- Central Valley swells with agricultural harvests.
- Coastal trade winds keep temperatures mild and pleasant.
Tip: Visit wine country; the vines thrive in these dry conditions.
May: Summer Heat Kicks In
- Hot inland temperatures can exceed 90 °F in parts of Los Angeles and Fresno.
- Coastal moderation keeps San Francisco comfy (~60 °F).
- Solar exposure is strong—sun protection is essential.
Tip: Early mornings and late afternoons offer better hiking conditions to avoid midday heat.
June: Peak Warmth
- Southern California sunsets are a must‑see; the heat builds to 95 °F.
- The Sierra begins to see first signs of snow as temperatures drop at night.
- Coastal fog intensifies along the Bay.
Tip: Book accommodations far in advance for the busy Southern California beach season.
July: The Burning Month
- Heatwaves are common; temperatures can spike above 95 °F.
- Coastal breezes provide relief, but inland stays scorched.
- California National Parks experience high visitor numbers.
Tip: Start early when visiting parks; use shaded trails and stay hydrated.
August: Last of the Summer
- Still scorching; temperatures remain high in inland areas.
- Rainfall is minimal—water scarcity can become an issue (dry‑period advisory).
- Nights are cooler; sunsets remain spectacular.
Tip: Consider a visit to the desert (Joshua Tree) – its evening temperatures drop comfortably.
September: Early Cooling
- Inland temperatures drop to the mid‑80s.
- The West Coast begins to embrace October’s crispness.
- Coastal fog increases again, especially in San Diego.
Tip: Take advantage of lower crowds in some tourist spots; still plenty of sunshine for beach days.
October: Golden Transition
- Perfect weather for hiking in Yosemite (average 60–75 °F).
- Central Valley starts grape harvesting—visit Napa for tours.
- Coastal temperatures slowly cool toward 40–50 °F.
Tip: Attend fall festivals or harvest events; weather is ideal for photography.
November: First Coolness & Rain
- Rainfall increases, especially in the northern tier.
- Snow is likely in Sierra Nevada’s higher elevations.
- Southern beaches become cooler but still enjoyable.
Tip: Ideal time for winter sports enthusiasts—ski resorts open early.
December: Winter’s Wrap‑up
- Coastal Los Angeles remains mild; 60–65 °F day, 45–50 °F night.
- Northern regions receive significant snow; holiday lights enhance festive vibe.
- Winter storms bring moisture to southern highlands.
Tip: Book resorts or hotels early—holiday season is peak travel time.
FAQ
Q1: When is the best time to visit California to avoid crowds?
A1: Late October to early December offers pleasant weather and fewer tourists, especially on the coast and in national parks.
Q2: Is it safe to hike in California during the summer?
A2: Yes, but start early, carry ample water, and use shade whenever possible. Avoid hikes after noon when temperatures peak.
Q3: How does California’s climate affect wildfires?
A3: Dry months (May to September) and high temperatures increase wildfire risk—plan outdoor activities accordingly and stay informed about local fire advisories.
Q4: Are there rainy days in California year-round?
A4: Most rain falls between October and April with the most in January. Mediterranean climates create dry summers and wet winters, especially in coastal and valley regions.
Q5: When does snow usually arrive in the Sierra Nevada?
A5: Snow typically starts forming in late October, with heavy accumulation throughout December and January; it can persist into April.
