The best time to visit Hayward
Month-by-month climate averages for Hayward, CA, so you can pick your dates on data rather than guesswork.
The most comfortable time to visit Hayward is usually April, May, June and July, when daytime highs sit in the pleasant 60-78°F range and the heaviest January rain is behind you.
Hayward is warmest in September (highs near 74°F) and coldest in December (lows around 41°F), with roughly 20 inches of precipitation across the year and January the wettest month. The sweet spot for most visitors is April, May, June and July.
These are long-run averages. For the actual days you are travelling, check the live Hayward forecast - and note how much the models agree, because that tells you how much to trust it.
Hayward weather by month
what to expect in Hayward through the year, 1991-2020 averagesHere is Hayward'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 Hayward by season.