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Weather in Santa Ana, California for September 2025

Your guide to Santa Ana weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Beach Hazards Statement - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Santa Ana is slightly cooler than the historical average by -1.6 °F.

  • Expect cooler weather in the next days in Santa Ana with the forecast suggesting a temperature of 27.1 °F, lower than the historical average.

  • In general, the average temperature in Santa Ana at the beginning of September is 31.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25.9 °F by the end of September.

    • Rain 🌧️

  • Precipitation in Santa Ana during September is a rare event, with an average of fewer than 2 rainy days.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
29
Dry days
Average rainy days
1
Rainy days
Average snowy days
0
Snow days
Average temperatures
27°/17°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
62 %
Avg humidity

Santa Ana Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
31°
2
Cloudy
31°
3
Overcast
30°
4
Overcast
29°
5
Overcast
31°
6
Overcast
32°
7
Sunny
34°
8
Sunny
34°
9
Sunny
31°
10
Overcast
28°
11
Partly cloudy
27°
12
Partly cloudy
27°
13
Cloudy
25°
14
Cloudy
26°
15
Weather Alert Partly cloudy
30°
16
Sunny
32°
17
Partly cloudy
29°
18
Moderate rain
26°
19
Patchy rain possible
27°
20
Sunny
28°
21
Sunny
28°
22
Patchy rain possible
26°
23
Sunny
26°
24
Sunny
29°
25
Sunny
29°
26
Sunny
25°
27
Sunny
23°
28
Sunny
22°
29
Cloudy
27°
30
Light rain shower
26°

Temperatures trend during September in Santa Ana

See the weather trend as well as the moving average line

September weather in Santa Ana day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Patchy rain possible
Patchy rain possible
 31° /19° 1 mm 7
Sept. 2 Cloudy
Cloudy
 31° /21° 0 mm 7
Sept. 3 Overcast
Overcast
 30° /20° 0 mm 7
Sept. 4 Overcast
Overcast
 29° /19° 0 mm 7
Sept. 5 Overcast
Overcast
 31° /20° 0 mm 8
Sept. 6 Overcast
Overcast
 32° /20° 0 mm 8
Sept. 7 Sunny
Sunny
 34° /19° 0 mm 8
Sept. 8 Sunny
Sunny
 34° /21° 0 mm 8
Sept. 9 Sunny
Sunny
 31° /21° 0 mm 7
Sept. 10 Overcast
Overcast
 28° /19° 0 mm 7
Sept. 11 Partly cloudy
Partly cloudy
 27° /19° 0 mm 7
Sept. 12 Partly cloudy
Partly cloudy
 27° /17° 0 mm 7
Sept. 13 Cloudy
Cloudy
 25° /16° 0 mm 6
Sept. 14 Cloudy
Cloudy
 26° /16° 0 mm 6
Sept. 15 Partly cloudy
Partly cloudy
 30° /18° 0 mm 1.9
Sept. 16 Sunny
Sunny
 32° /20° 0 mm 1.9
Sept. 17 Partly cloudy
Partly cloudy
 29° /19° 0 mm 1.5
Sept. 18 Moderate rain
Moderate rain
 26° /22° 12.6 mm 1.9
Sept. 19 Patchy rain possible
Patchy rain possible
 27° /23° 1.3 mm 0
Sept. 20 Sunny
Sunny
 28° /23° 0 mm 6
Sept. 21 Sunny
Sunny
 28° /21° 0 mm 6
Sept. 22 Patchy rain possible
Patchy rain possible
 26° /20° 0.8 mm 5
Sept. 23 Sunny
Sunny
 26° /19° 0 mm 6
Sept. 24 Sunny
Sunny
 29° /21° 0 mm 6
Sept. 25 Sunny
Sunny
 29° /22° 0 mm 6
Sept. 26 Sunny
Sunny
 25° /20° 0 mm 6
Sept. 27 Sunny
Sunny
 23° /18° 0 mm 5
Sept. 28 Sunny
Sunny
 22° /17° 0 mm 5
Sept. 29 Cloudy
Cloudy
 27° /15° 0 mm 6
Sept. 30 Light rain shower
Light rain shower
 26° /15° 0.7 mm 7
Next
Important Notice
Our weather forecast for Santa Ana in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Santa Ana forecast closer to your planned date for the most up-to-date weather information.
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Santa Ana in September - FAQ

What are the expected maximum and minimum temperatures in Santa Ana during September?
During September, expect a variety of temperatures with highs around 27° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Santa Ana during September?
Rainfall in Santa Ana during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Santa Ana during September?
The average wind speed in Santa Ana during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Santa Ana

Explore the daily rainfall trends and prepare for Santa Anas September weather 💧

UV exposure in Santa Ana during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

Quick links

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Location coordinates Where is Santa Ana?

Get accurate weather forecasts for Santa Ana, located at latitude 33.746 and longitude -117.868. Stay updated with localized weather information tailored for Santa Ana.

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