Garden Grove (CA)
September
Weather in Garden Grove, California for September 2026
Your guide to Garden Grove weather in September - trends and predictions
So far, September 2026 in Garden Grove is slightly warmer than the historical average by 1.4 °F.
The forecast for the upcoming days in Garden Grove predicts a temperature of 28.1 °F, which is slightly above the historical average.
In general, the average temperature in Garden Grove at the beginning of September is 30 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 27 °F by the end of September.
With an average of 2 rainy days, Garden Grove experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
More
28
Dry days
2
Rainy days
0
Snow days
26°/18°
Temperatures
16 km/h
Avg max wind
68 %
Avg humidity
Garden Grove Weather September
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Temperatures trend during September in Garden Grove
See the weather trend as well as the moving average line
September weather in Garden Grove day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 29° /19° | 0.7 mm | 8 | |
| Sept. 2 | Sunny | 30° /20° | 0 mm | 8 | |
| Sept. 3 |  Overcast | 30° /20° | 0 mm | 7 | |
| Sept. 4 | Sunny | 28° /19° | 0 mm | 8 | |
| Sept. 5 | Sunny | 31° /19° | 0 mm | 8 | |
| Sept. 6 | Overcast | 30° /20° | 2.4 mm | 6 | |
| Sept. 7 |  Cloudy | 32° /20° | 0 mm | 7 | |
| Sept. 8 |  Partly cloudy | 34° /21° | 0 mm | 8 | |
| Sept. 9 | Partly cloudy | 33° /22° | 0 mm | 7 | |
| Sept. 10 | Sunny | 29° /21° | 0 mm | 7 | |
| Sept. 11 | Overcast | 27° /20° | 0 mm | 7 | |
| Sept. 12 |  Mist | 26° /18° | 0 mm | 7 | |
| Sept. 13 | Overcast | 25° /18° | 0 mm | 6 | |
| Sept. 14 | Overcast | 25° /18° | 0 mm | 7 | |
| Sept. 15 | Cloudy | 25° /18° | 0 mm | 7 | |
| Sept. 16 | Mist | 25° /18° | 0 mm | 7 | |
| Sept. 17 | Overcast | 24° /18° | 0.4 mm | 6 | |
| Sept. 18 | Overcast | 25° /18° | 3 mm | 6 | |
| Sept. 19 | Overcast | 24° /18° | 0 mm | 6 | |
| Sept. 20 | Overcast | 24° /17° | 0 mm | 5 | |
| Sept. 21 | Sunny | 24° /20° | 0.1 mm | 7.3 | |
| Sept. 22 | Sunny | 23° /20° | 0 mm | 7.4 | |
| Sept. 23 | Sunny | 26° /21° | 0 mm | 7.3 | |
| Sept. 24 | Sunny | 26° /22° | 0 mm | 7.3 | |
| Sept. 25 | Overcast | 27° /22° | 0 mm | 7.4 | |
| Sept. 26 | Overcast | 28° /23° | 0 mm | 7 | |
| Sept. 27 | Sunny | 27° /22° | 0 mm | 7 | |
| Sept. 28 | Sunny | 26° /21° | 0 mm | 7 | |
| Sept. 29 | Sunny | 27° /22° | 0 mm | 7 | |
| Sept. 30 | Sunny | 28° /22° | 0 mm | 7 | |
| Next | |||||
Important Notice
Our weather forecast for Garden Grove 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 Garden Grove forecast closer to your planned date for the most up-to-date weather information.
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Garden Grove in September - FAQ
What are the expected maximum and minimum temperatures in Garden Grove during September?
During September, expect a variety of temperatures with highs around 26° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Garden Grove during September?
Rainfall in Garden Grove during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 2 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 Garden Grove during September?
The average wind speed in Garden Grove during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Garden Grove
Explore the daily rainfall trends and prepare for Garden Groves September weather 💧
Typically, Garden Grove has 2 rainy days in September with a total of 5.5 mm of rainfall.
UV exposure in Garden Grove during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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