Hayward
September
Weather in Hayward for September 2025
Your guide to Hayward weather in September - trends and predictions
In general, the average temperature in Hayward at the beginning of September is 26.3 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 24.3 °F by the end of September.
Precipitation in Hayward during September is a rare event, with an average of fewer than 2 rainy days.
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29
Dry days
1
Rainy days
0
Snow days
24°/12°
Temperatures
15 km/h
Avg max wind
74 %
Avg humidity
Hayward in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  21° | 2  23° | 3 28° | 4  29° | 5 29° | 6  28° | 7 26° |
| 8 27° | 9 26° | 10 26° | 11 24° | 12 25° | 13 27° | 14 26° |
| 15 22° | 16 21° | 17 18° | 18 21° | 19 20° | 20 21° | 21  23° |
| 22 25° | 23 27° | 24 26° | 25 22° | 26 22° | 27 28° | 28 23° |
| 29 23° | 30 26° |
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Temperatures trend during September in Hayward
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Patchy rain possible | 21° /13° | 0.1 mm | 5 | |
| Sept. 2 | Overcast | 23° /12° | 0 mm | 6 | |
| Sept. 3 | Overcast | 28° /12° | 0 mm | 7 | |
| Sept. 4 | Mist | 29° /14° | 0 mm | 7 | |
| Sept. 5 | Mist | 29° /13° | 0 mm | 7 | |
| Sept. 6 | Cloudy | 28° /13° | 0 mm | 7 | |
| Sept. 7 | Mist | 26° /12° | 0 mm | 7 | |
| Sept. 8 | Mist | 27° /11° | 0 mm | 7 | |
| Sept. 9 | Mist | 26° /11° | 0 mm | 7 | |
| Sept. 10 | Mist | 26° /11° | 0 mm | 6 | |
| Sept. 11 | Mist | 24° /11° | 0 mm | 6 | |
| Sept. 12 | Overcast | 25° /12° | 0 mm | 6 | |
| Sept. 13 | Mist | 27° /13° | 0 mm | 7 | |
| Sept. 14 | Mist | 26° /12° | 0 mm | 7 | |
| Sept. 15 | Mist | 22° /12° | 0 mm | 5 | |
| Sept. 16 | Mist | 21° /12° | 0.7 mm | 5 | |
| Sept. 17 | Mist | 18° /11° | 0 mm | 4 | |
| Sept. 18 | Mist | 21° /11° | 0 mm | 5 | |
| Sept. 19 | Mist | 20° /11° | 0 mm | 5 | |
| Sept. 20 | Mist | 21° /11° | 0 mm | 5 | |
| Sept. 21 | Partly cloudy | 23° /10° | 0 mm | 6 | |
| Sept. 22 | Mist | 25° /10° | 0 mm | 6 | |
| Sept. 23 | Overcast | 27° /11° | 0 mm | 7 | |
| Sept. 24 | Mist | 26° /12° | 0 mm | 6 | |
| Sept. 25 | Overcast | 22° /11° | 0 mm | 6 | |
| Sept. 26 | Patchy rain possible | 22° /12° | 0 mm | 5 | |
| Sept. 27 | Mist | 28° /11° | 0 mm | 7 | |
| Sept. 28 | Mist | 23° /11° | 0 mm | 5 | |
| Sept. 29 | Partly cloudy | 23° /11° | 0 mm | 6 | |
| Sept. 30 | Light rain shower | 26° /12° | 1.2 mm | 6 | |
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Important Notice
Our weather forecast for Hayward 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 Hayward forecast closer to your planned date for the most up-to-date weather information.
Hayward in September - FAQ
What are the expected maximum and minimum temperatures in Hayward during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Hayward during September?
Rainfall in Hayward 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 Hayward during September?
The average wind speed in Hayward during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Hayward
Explore the daily rainfall trends and prepare for Haywards September weather 💧
UV exposure in Hayward during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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