Temperatures in September
It's warm in September in Santa Monica with an average temperature of 26°C. Temperatures this month range from a low of 24°C to a high of 29°C. At night, you can expect temperatures between 17°C and 21°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Santa Monica in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Santa Monica with hot temperatures, averaging around 27°C during the day and nights close to 20°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Since temperatures can differ between day and night, it’s a good idea to dress in layers.
Mid-September
By mid-September, the average daytime temperature drops to around 26°C, with nights close to 19°C. Not much precipitation expected during this period. It’s mostly dry with sunshine.
Temperatures vary between day and night, so it’s smart to wear layers.
End of September
By the end of September, the average daytime temperature in Santa Monica will be around 26°C, with nights close to 19°C. No precipitation expected, with plenty of sunshine on the horizon.
As it gets cooler in the evening, it’s best to wear layers.
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Water temperature
The water temperature at Santa Monica is 25°C this month. Lovely temperature for a swim.
Precipitation in September
In September, there is an average of 24 mm of precipitation, spread over 1 day. The wind speed is around 3 Bft, mostly coming from the Southwest.
The average chance of precipitation is only 2% in September.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Santa Monica. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Santa Monica in September |
London | ||
|---|---|---|---|
 Average Temperature |
26°C | 20°C | |
 High Temp |
29°C | 22°C | |
| Low Temp |
24°C | 17°C | |
 Total Precipitation |
24 mm | 44 mm | |
| Rainy Days |
1 day | 8 days | |
August
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is September a good time to visit Santa Monica?
Want nice weather? Then September is a great time to be in Santa Monica. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for Santa Monica in September
With 38°C, Santa Monica hit the highest temperature in the last 10 years in September 2022. The lowest daytime temperature in this month was 18°C in 2021. The extreme night temperatures ranged from a low of 13°C to a high of 25°C.
Check out the climate of Santa Monica for all months and discover the best travel time
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Daily Temperature in September in Santa Monica
This chart shows the average daily temperatures, both day and night, for each day in September in Santa Monica, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Santa Monica
The chart below shows the average daily precipitation in September for Santa Monica, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect about 1 day of rain in Santa Monica.
Daily UV Index in September in Santa Monica
This chart shows the average daily UV index in September in Santa Monica, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Santa Monica Over the Years
This chart shows the average temperature in September in Santa Monica, measured in degrees Celsius, over the past years.
Total Precipitation in September in Santa Monica Over the Years
This chart shows the average precipitation in September in Santa Monica, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Santa Monica
Click on a specific day in September for detailed info on the typical weather on that day in Santa Monica. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Santa Monica
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Average Weather in Santa Monica by Month
Click on a month below to see detailed weather info for Santa Monica. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Santa Monica for all months at once
