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 January, March, April 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 August (highs near 95°F) and coldest in December (lows around 42°F), with roughly 23 inches of precipitation across the year and February the wettest month. The sweet spot for most visitors is January, March, April 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 year, 1991-2020 averagesHere 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.