The best time to visit Fontana
Month-by-month climate averages for Fontana, CA, so you can pick your dates on data rather than guesswork.
The most comfortable time to visit Fontana is usually March, April, May and November, when daytime highs sit in the pleasant 60-78°F range and the heaviest February rain is behind you.
Fontana is warmest in July (highs near 98°F) and coldest in January (lows around 42°F), with roughly 29 inches of precipitation across the year and February the wettest month. The sweet spot for most visitors is March, April, May and November.
These are long-run averages. For the actual days you are travelling, check the live Fontana forecast — and note how much the models agree, because that tells you how much to trust it.
Fontana weather by month
what to expect in Fontana through the yearHere is Fontana's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to Fontana by season.