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Chula Vista (CA)
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Weather in Chula Vista, California for September 2025

Your guide to Chula Vista weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Chula Vista is slightly cooler than the historical average by -1.9 °F.

  • The forecast for the next days in Chula Vista predicts temperatures to be around 25 °F, close to the historical average.

  • In general, the average temperature in Chula Vista at the beginning of September is 27.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 23.4 °F by the end of September.

    • Rain 🌧️

  • Precipitation in Chula Vista 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
24°/18°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
69 %
Avg humidity

Chula Vista Weather September

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

Temperatures trend during September in Chula Vista

See the weather trend as well as the moving average line

September weather in Chula Vista day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Partly cloudy
Partly cloudy
 27° /19° 0 mm 7
Sept. 2 Overcast
Overcast
 27° /20° 0 mm 7
Sept. 3 Mist
Mist
 27° /20° 0 mm 6
Sept. 4 Overcast
Overcast
 26° /20° 0 mm 6
Sept. 5 Overcast
Overcast
 28° /20° 0 mm 7
Sept. 6 Cloudy
Cloudy
 27° /20° 0 mm 6
Sept. 7 Partly cloudy
Partly cloudy
 28° /20° 0 mm 7
Sept. 8 Partly cloudy
Partly cloudy
 30° /22° 0 mm 7
Sept. 9 Partly cloudy
Partly cloudy
 28° /21° 0 mm 7
Sept. 10 Overcast
Overcast
 26° /20° 0 mm 6
Sept. 11 Cloudy
Cloudy
 25° /19° 0 mm 6
Sept. 12 Cloudy
Cloudy
 23° /18° 0 mm 5
Sept. 13 Cloudy
Cloudy
 22° /17° 0 mm 5
Sept. 14 Cloudy
Cloudy
 23° /17° 0 mm 5
Sept. 15 Partly cloudy
Partly cloudy
 25° /18° 0 mm 2
Sept. 16 Partly cloudy
Partly cloudy
 26° /20° 0 mm 2
Sept. 17 Overcast
Overcast
 23° /20° 0 mm 1.5
Sept. 18 Moderate rain
Moderate rain
 27° /23° 17.3 mm 1.8
Sept. 19 Patchy rain possible
Patchy rain possible
 27° /23° 2.4 mm 0
Sept. 20 Sunny
Sunny
 27° /23° 0 mm 6
Sept. 21 Patchy rain possible
Patchy rain possible
 27° /22° 0.2 mm 5
Sept. 22 Sunny
Sunny
 26° /22° 0.1 mm 6
Sept. 23 Sunny
Sunny
 26° /21° 0 mm 6
Sept. 24 Sunny
Sunny
 28° /21° 0 mm 6
Sept. 25 Sunny
Sunny
 28° /22° 0 mm 6
Sept. 26 Partly cloudy
Partly cloudy
 24° /20° 0 mm 6
Sept. 27 Sunny
Sunny
 20° /18° 0 mm 5
Sept. 28 Patchy rain possible
Patchy rain possible
 20° /18° 0.3 mm 4
Sept. 29 Cloudy
Cloudy
 22° /16° 0 mm 6
Sept. 30 Patchy rain possible
Patchy rain possible
 22° /15° 2.2 mm 6
Next
Important Notice
Our weather forecast for Chula Vista 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 Chula Vista forecast closer to your planned date for the most up-to-date weather information.
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Chula Vista in September - FAQ

What are the expected maximum and minimum temperatures in Chula Vista during September?
During September, expect a variety of temperatures with highs around 24° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Chula Vista during September?
Rainfall in Chula Vista 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 Chula Vista during September?
The average wind speed in Chula Vista during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Chula Vista

Explore the daily rainfall trends and prepare for Chula Vistas September weather 💧

UV exposure in Chula Vista 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 Chula Vista?

Get accurate weather forecasts for Chula Vista, located at latitude 32.64 and longitude -117.084. Stay updated with localized weather information tailored for Chula Vista.

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