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Weather in Santa Rosa for September 2025

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

    Temperatures

  • Until now, September 2025 in Santa Rosa has been nearly identical to the historical average, with a temperature of 28.7 °C (showing only a slight deviation of -0.5 °C).

  • The forecast for the next days in Santa Rosa predicts temperatures to be around 30 °C, close to the historical average.

  • In general, the average temperature in Santa Rosa at the beginning of September is 28.7 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 30 °C by the end of September.

    • Rain 🌧️

  • Santa Rosa experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 333.7 mm.

Average dry days
6
Dry days
Average rainy days
24
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/25°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
84 %
Avg humidity

Santa Rosa Weather September

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

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

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /24° 25.6 mm 7
2 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 26° /24° 52.1 mm 6
3 Sept. Moderate rain at times
Moderate rain at times
 29° /24° 13.7 mm 6
4 Sept. Heavy rain at times
Heavy rain at times
 29° /24° 11.8 mm 6
5 Sept. Heavy rain at times
Heavy rain at times
 29° /24° 9.9 mm 7
6 Sept. Moderate rain at times
Moderate rain at times
 29° /25° 5.1 mm 7
7 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /24° 6.3 mm 7
8 Sept. Patchy rain possible
Patchy rain possible
 30° /24° 0.5 mm 7
9 Sept. Moderate rain at times
Moderate rain at times
 30° /24° 1.2 mm 7
10 Sept. Patchy rain possible
Patchy rain possible
 31° /24° 1.7 mm 7
11 Sept. Heavy rain at times
Heavy rain at times
 30° /24° 3.2 mm 7
12 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /25° 9.4 mm 7
13 Sept. Patchy rain possible
Patchy rain possible
 31° /24° 1.6 mm 3
14 Sept. Patchy rain possible
Patchy rain possible
 30° /25° 0.7 mm 2.7
15 Sept. Patchy rain possible
Patchy rain possible
 30° /25° 2.6 mm 2.4
16 Sept. Moderate rain
Moderate rain
 31° /25° 10.6 mm 2.4
17 Sept. Moderate rain
Moderate rain
 30° /24° 14.3 mm 3
18 Sept. Moderate rain
Moderate rain
 29° /25° 5.6 mm 6
19 Sept. Patchy rain possible
Patchy rain possible
 30° /24° 2.9 mm 6
20 Sept. Moderate rain
Moderate rain
 30° /24° 5.9 mm 6
21 Sept. Patchy rain possible
Patchy rain possible
 30° /24° 3.4 mm 6
22 Sept. Patchy rain possible
Patchy rain possible
 31° /24° 0.4 mm 6
23 Sept. Patchy rain possible
Patchy rain possible
 31° /24° 1.3 mm 6
24 Sept. Patchy rain possible
Patchy rain possible
 30° /24° 2.3 mm 6
25 Sept. Patchy rain possible
Patchy rain possible
 30° /24° 2.1 mm 6
26 Sept. Patchy rain possible
Patchy rain possible
 31° /24° 0.6 mm 6
27 Sept. Patchy rain possible
Patchy rain possible
 30° /24° 1.3 mm 7
28 Sept. Patchy rain possible
Patchy rain possible
 30° /25° 0.7 mm 7
29 Sept. Patchy rain possible
Patchy rain possible
 29° /26° 0.6 mm 6
30 Sept. Light rain shower
Light rain shower
 30° /26° 3.5 mm 7
Next
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.
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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 333.7 mm is expected in Santa Rosa during September, occurring over more than 24 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 💧

UV exposure in Santa Rosa 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 Rosa?

Get accurate weather forecasts for Santa Rosa, located at latitude 14.312 and longitude 121.111. Stay updated with localized weather information tailored for Santa Rosa.

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