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California Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in California, the United States of America in September.

Are you planning a trip a to California, the United States of America in September and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in California in September

California, the United States of America is a region in the United States of America. The weather in California in September can be quite varied, with temperatures that range from mild to very hot and precipitation levels ranging from almost none to moderate.

Temperatures

The average highest temperatures fluctuate between mild in Point Arena at 16°C (61°F) to very hot in Furnace Creek at 42°C (108°F). Nighttime temperatures generally drop to 25°C (77°F) in Furnace Creek and 10°C (50°F) in Point Arena. On average, September is the month with the highest temperature of the year in California, the United States of America.

To explore the conditions in California, the United States of America in more detail, check the map below.

Precipitation

In September, precipitation varies across different areas. From almost no rainfall in Buttonwillow with an average of 0.1 mm (0 in) to moderate rainfall in Crescent City with 40 mm (1.6 in).

Average sunshine

Most destinations offer generous amounts of sunshine this September. For example, Los Angeles gets approximately 278 hours of sunlight, perfect for anyone wanting bright, sunny days.

Explore California by month

Pick a month to see the average temperature, rainfall and sunshine in California - and find the best time to visit. (based on Los Angeles)

Best Places to Visit in California in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across California.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in California

What is the weather like in September for some of the most popular destinations in California, the United States of America?

Temperature range in California (September)

Precipitation variation in California (September)

Los Angeles

In September Los Angeles generally has high temperatures with maximum daytime temperatures around 25°C (77°F), minimum nighttime temperatures around 18°C (64°F) and almost no monthly rainfall. So on average the conditions are excellent that month.

August
September
October
Max temperature
24°C (75°F)
25°C (77°F)
24°C (75°F)
Min temperature
18°C (64°F)
18°C (64°F)
16°C (61°F)
Monthly sun hours
347 hours
278 hours
255 hours
Monthly rainfall
0.1 mm (0 in)
4.6 mm (0.2 in)
9.2 mm (0.4 in)
Monthly rainy days
0 days
0 days
3 days
Weather conditions

Big Bear Lake

In September Big Bear Lake generally has high temperatures with maximum daytime temperatures around 24°C (75°F), minimum nighttime temperatures around 6°C (43°F) and low monthly rainfall. So on average the conditions are excellent that month.

August
September
October
Max temperature
27°C (81°F)
24°C (75°F)
19°C (66°F)
Min temperature
9°C (48°F)
6°C (43°F)
1°C (34°F)
Monthly rainfall
14 mm (0.6 in)
10 mm (0.4 in)
15 mm (0.6 in)
Monthly rainy days
4 days
3 days
3 days
Weather conditions

San Francisco

In September San Francisco generally has high temperatures with maximum daytime temperatures around 23°C (73°F), minimum nighttime temperatures around 13°C (55°F) and almost no monthly rainfall. So on average the conditions are excellent that month.

August
September
October
Max temperature
22°C (72°F)
23°C (73°F)
22°C (72°F)
Min temperature
14°C (57°F)
13°C (55°F)
12°C (54°F)
Monthly sun hours
288 hours
270 hours
243 hours
Monthly rainfall
0.7 mm (0.03 in)
3.4 mm (0.1 in)
23 mm (0.9 in)
Monthly rainy days
a single day
a single day
4 days
Weather conditions

San Diego

In September San Diego generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 18°C (64°F) and almost no monthly rainfall. So on average the conditions are excellent that month.

August
September
October
Max temperature
26°C (79°F)
26°C (79°F)
25°C (77°F)
Min temperature
19°C (66°F)
18°C (64°F)
16°C (61°F)
Monthly sun hours
295 hours
253 hours
243 hours
Monthly rainfall
0.6 mm (0.02 in)
4.3 mm (0.2 in)
13 mm (0.5 in)
Monthly rainy days
a single day
a single day
4 days
Weather conditions

Anaheim

In September Anaheim generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 18°C (64°F) and low monthly rainfall. So on average the conditions are excellent that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
28°C (82°F)
Min temperature
18°C (64°F)
18°C (64°F)
15°C (59°F)
Monthly sun hours
351 hours
290 hours
252 hours
Monthly rainfall
0.3 mm (0.01 in)
5 mm (0.2 in)
11 mm (0.4 in)
Monthly rainy days
0 days
a single day
3 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in California, in the United States of America.

Popular cities in September

Day & night temperatures, rainfall and average weather in California in September.

City Weather Day temp Night temp Rainfall
Los Angeles 25°C (77°F) 18°C (64°F) 4.6 mm (0.2 in)
Big Bear Lake 24°C (75°F) 6°C (43°F) 10 mm (0.4 in)
San Francisco 23°C (73°F) 13°C (55°F) 3.4 mm (0.1 in)
San Diego 26°C (79°F) 18°C (64°F) 4.3 mm (0.2 in)
Anaheim 30°C (86°F) 18°C (64°F) 5 mm (0.2 in)
Palm Desert 38°C (100°F) 23°C (73°F) 5.3 mm (0.2 in)

California weather in September: frequently asked questions

What is the weather like in California, the United States of America in September?

California, the United States of America typically experiences excellent weather in September, part of the season. Daytime highs in Los Angeles average around 25°C (77°F), and temperatures drop to about 18°C (64°F) at night.

What is the average temperature in California, the United States of America in September?

Los Angeles averages a daytime maximum of 25°C (77°F) in September, with overnight lows close to 18°C (64°F).

Does California, the United States of America get a lot of rain in September?

Not particularly. Los Angeles averages just 4.6 mm (0.2 in) of rain in September, making it a mostly dry month for California, the United States of America.

Is September a Good Time to Visit California, the United States of America?

We believe that September is one of the best times to visit California, the United States of America with overall excellent weather in Los Angeles. It's worth noting that weather conditions might differ depending on the location you visit.

On average, the best time to visit California, the United States of America is in January, March, April, May, June, July, August, September, October and November with generally excellent weather in Los Angeles.

Interested in more climate information?

We have much more information about the climate in California.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.