Santa Rosa
September
Weather in Santa Rosa for September 2027
Your guide to Santa Rosa weather in September - trends and predictions
In general, the average temperature in Santa Rosa at the beginning of September is 28.6 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 30.1 °C by the end of September.
Santa Rosa experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 320.4 mm.
Is September a good time to visit Santa Rosa? check out the best time to travel to Santa Rosa page.
Temperatures
Rain 🌧️
More
4
Dry days
26
Rainy days
0
Snow days
29°/25°
Temperatures
17 km/h
Avg max wind
82 %
Avg humidity
Santa Rosa Weather September
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Temperatures trend during September in Santa Rosa
See the weather trend as well as the moving average line
September weather in Santa Rosa day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Moderate rain | 29° /25° | 17.6 mm | 5 | |
| 2 Sept. | Heavy rain | 27° /25° | 37.6 mm | 5 | |
| 3 Sept. | Moderate rain | 29° /25° | 14.9 mm | 5 | |
| 4 Sept. | Moderate rain | 29° /25° | 12.5 mm | 5 | |
| 5 Sept. | Moderate rain | 28° /25° | 13.4 mm | 5 | |
| 6 Sept. | Light rain | 29° /25° | 8.3 mm | 5 | |
| 7 Sept. | Light rain | 29° /25° | 6.5 mm | 5 | |
| 8 Sept. | Light rain | 29° /25° | 5.3 mm | 5 | |
| 9 Sept. | Moderate rain at times | 29° /24° | 7.9 mm | 5 | |
| 10 Sept. | Light rain | 29° /24° | 7.4 mm | 5 | |
| 11 Sept. | Light rain | 29° /24° | 4.6 mm | 5 | |
| 12 Sept. | Moderate or heavy rain shower | 30° /25° | 9.1 mm | 6 | |
| 13 Sept. | Moderate rain | 29° /24° | 17.3 mm | 5 | |
| 14 Sept. | Moderate rain | 28° /24° | 13.2 mm | 6 | |
| 15 Sept. | Light rain | 29° /25° | 6.7 mm | 7 | |
| 16 Sept. | Moderate rain | 30° /25° | 14.7 mm | 6 | |
| 17 Sept. | Heavy rain at times | 29° /24° | 13.9 mm | 5 | |
| 18 Sept. | Moderate rain | 29° /24° | 16.2 mm | 5 | |
| 19 Sept. | Moderate rain at times | 30° /25° | 9 mm | 5 | |
| 20 Sept. | Heavy rain at times | 29° /25° | 6 mm | 5 | |
| 21 Sept. | Moderate rain | 28° /24° | 18.9 mm | 6 | |
| 22 Sept. | Moderate rain | 28° /24° | 23.3 mm | 5 | |
| 23 Sept. | Light rain | 30° /24° | 9.1 mm | 6 | |
| 24 Sept. | Moderate or heavy rain shower | 31° /25° | 8 mm | 6 | |
| 25 Sept. | Light rain | 30° /25° | 4 mm | 5 | |
| 26 Sept. | Light rain | 29° /25° | 6.3 mm | 5 | |
| 27 Sept. | Patchy rain possible | 30° /25° | 1 mm | 6 | |
| 28 Sept. | Light rain | 30° /25° | 2.6 mm | 5 | |
| 29 Sept. | Light rain | 30° /25° | 3.4 mm | 6 | |
| 30 Sept. | Patchy rain possible | 31° /25° | 1.6 mm | 5 | |
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Important Notice
Our weather forecast for Santa Rosa 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 Rosa forecast closer to your planned date for the most up-to-date weather information.
Change Month
Santa Rosa in September - FAQ
What are the expected maximum and minimum temperatures in Santa Rosa during September?
During September, expect a variety of temperatures with highs around 29° and lows near 25°, suitable for diverse activities and preferences.
How much rainfall should be expected in Santa Rosa during September?
Significant rainfall exceeding 320.4 mm is expected in Santa Rosa during September, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Santa Rosa during September?
The average wind speed in Santa Rosa during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Santa Rosa
Explore the daily rainfall trends and prepare for Santa Rosas September weather 💧
Typically, Santa Rosa has 26 rainy days in September with a total of 320.4 mm of rainfall.
UV exposure in Santa Rosa during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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