Click on a day for an hourly weather forecast
The temperatures in Walnut Creek in October are comfortable with low of 14°C and and high up to 25°C.
The wather in Walnut Creek in October can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Walnut Creek in October 2025.
If you’re planning to visit Walnut Creek in the near future, we highly recommend that you review the 14 day weather forecast for Walnut Creek before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 15° / 7° | 5 | 26 | 0 | 102 mm | Good | Walnut Creek in January |
| February | 16° / 7° | 4 | 24 | 0 | 98 mm | Good | Walnut Creek in February |
| March | 18° / 8° | 6 | 25 | 0 | 94 mm | Good | Walnut Creek in March |
| April | 21° / 9° | 2 | 28 | 0 | 36 mm | Good | Walnut Creek in April |
| May | 23° / 11° | 1 | 30 | 0 | 18 mm | Perfect | Walnut Creek in May |
| June | 27° / 14° | 0 | 30 | 0 | 6 mm | Perfect | Walnut Creek in June |
| July | 29° / 15° | 0 | 31 | 0 | 2 mm | Good | Walnut Creek in July |
| August | 29° / 15° | 0 | 31 | 0 | 1 mm | Good | Walnut Creek in August |
| September | 29° / 16° | 0 | 30 | 0 | 4 mm | Good | Walnut Creek in September |
| October | 25° / 14° | 2 | 29 | 0 | 31 mm | Perfect | Walnut Creek in October |
| November | 19° / 10° | 3 | 27 | 0 | 55 mm | Good | Walnut Creek in November |
| December | 14° / 7° | 5 | 26 | 0 | 84 mm | Good | Walnut Creek in December |