Weather in West Covina, California for September 2026
Extreme Heat Warning - See hour by hour.
Until now, September 2026 in West Covina has been nearly identical to the historical average, with a temperature of 34.9 °F (showing only a slight deviation of 0.4 °F).
Expect cooler weather in the next days in West Covina with the forecast suggesting a temperature of 32.2 °F, lower than the historical average.
In general, the average temperature in West Covina at the beginning of September is 34.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.7 °F by the end of September.
Precipitation in West Covina during September is a rare event, with an average of fewer than 2 rainy days.
New! Chat with our AI weatherman - it’s amazing and free.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
More
West Covina Weather September
Temperatures trend during September in West Covina
September weather in West Covina day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Partly cloudy | 35° /19° | 0 mm | 10 | |
| Sept. 2 |  Cloudy | 36° /21° | 0 mm | 9 | |
| Sept. 3 | Cloudy | 34° /21° | 0 mm | 9 | |
| Sept. 4 |  Sunny | 34° /19° | 0 mm | 10 | |
| Sept. 5 | Sunny | 36° /18° | 0 mm | 9 | |
| Sept. 6 | Sunny | 33° /22° | 2.6 mm | 6 | |
| Sept. 7 | Sunny | 36° /20° | 0.3 mm | 6 | |
| Sept. 8 | Sunny | 38° /21° | 0 mm | 9 | |
| Sept. 9 | Partly cloudy | 27° /16° | 0 mm | 7 | |
| Sept. 10 | Sunny | 34° /26° | 0.2 mm | 8.6 | |
| Sept. 11 | Sunny | 31° /25° | 0 mm | 9.1 | |
| Sept. 12 | Sunny | 30° /23° | 0 mm | 9.1 | |
| Sept. 13 | Sunny | 29° /21° | 0 mm | 9.1 | |
| Sept. 14 | Sunny | 29° /21° | 0 mm | 7 | |
| Sept. 15 | Sunny | 29° /20° | 0 mm | 7 | |
| Sept. 16 | Sunny | 31° /21° | 0 mm | 8 | |
| Sept. 17 | Sunny | 34° /23° | 0 mm | 8 | |
| Sept. 18 | Sunny | 36° /24° | 0 mm | 9 | |
| Sept. 19 | Sunny | 38° /27° | 0 mm | 9 | |
| Sept. 20 | Sunny | 34° /25° | 0 mm | 8 | |
| Sept. 21 | Sunny | 31° /23° | 0 mm | 8 | |
| Sept. 22 | Sunny | 32° /22° | 0 mm | 8 | |
| Sept. 23 | Partly cloudy | 33° /24° | 0 mm | 8 | |
| Sept. 24 | Partly cloudy | 31° /22° | 0 mm | 8 | |
| Sept. 25 | Sunny | 28° /18° | 0 mm | 7 | |
| Sept. 26 |  Overcast | 20° /16° | 0 mm | 5 | |
| Sept. 27 | Cloudy | 23° /15° | 0 mm | 5 | |
| Sept. 28 | Overcast | 24° /15° | 0 mm | 5 | |
| Sept. 29 | Overcast | 24° /16° | 0 mm | 5 | |
| Sept. 30 | Cloudy | 23° /14° | 0 mm | 5 | |
| Next | |||||
West Covina in September - FAQ
What are the expected maximum and minimum temperatures in West Covina during September?
How much rainfall should be expected in West Covina during September?
What are the typical wind conditions in West Covina during September?
September rainfall patterns in West Covina
UV exposure in West Covina during September
Quick links
Where is West Covina?Get accurate weather forecasts for West Covina, located at latitude 34.069 and longitude -117.939. Stay updated with localized weather information tailored for West Covina.