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The temperatures in Rancho Cucamonga in October are comfortable with low of 17°C and and high up to 26°C.
You can expect a few rainy days in Rancho Cucamonga during October, but usually the weather is comfortable in October.
Our weather forecast can give you a great sense of what weather to expect in Rancho Cucamonga in October 2025.
If you’re planning to visit Rancho Cucamonga in the near future, we highly recommend that you review the 14 day weather forecast for Rancho Cucamonga before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 19° / 9° | 2 | 29 | 0 | 57 mm | Good | Rancho Cucamonga in January |
| February | 19° / 9° | 2 | 26 | 0 | 63 mm | Good | Rancho Cucamonga in February |
| March | 20° / 10° | 2 | 29 | 0 | 36 mm | Good | Rancho Cucamonga in March |
| April | 22° / 12° | 1 | 29 | 0 | 22 mm | Good | Rancho Cucamonga in April |
| May | 24° / 14° | 0 | 31 | 0 | 7 mm | Perfect | Rancho Cucamonga in May |
| June | 28° / 18° | 0 | 30 | 0 | 1 mm | Perfect | Rancho Cucamonga in June |
| July | 31° / 21° | 0 | 31 | 0 | 10 mm | Good | Rancho Cucamonga in July |
| August | 32° / 22° | 0 | 31 | 0 | 6 mm | Good | Rancho Cucamonga in August |
| September | 31° / 21° | 0 | 30 | 0 | 5 mm | Good | Rancho Cucamonga in September |
| October | 26° / 17° | 1 | 30 | 0 | 10 mm | Perfect | Rancho Cucamonga in October |
| November | 22° / 12° | 1 | 29 | 0 | 22 mm | Good | Rancho Cucamonga in November |
| December | 18° / 9° | 3 | 28 | 0 | 72 mm | Good | Rancho Cucamonga in December |