The best time to visit San Diego
Month-by-month climate averages for San Diego, CA, so you can pick your dates on data rather than guesswork.
The most comfortable time to visit San Diego is usually January, March, April and May, when daytime highs sit in the pleasant 60-78°F range and the heaviest February rain is behind you.
San Diego is warmest in September (highs near 78°F) and coldest in December (lows around 45°F), with roughly 10 inches of precipitation across the year and February the wettest month. The sweet spot for most visitors is January, March, April and May.
These are long-run averages. For the actual days you are travelling, check the live San Diego forecast - and note how much the models agree, because that tells you how much to trust it.
San Diego weather by month
what to expect in San Diego through the year, 1991-2020 averagesHere is San Diego'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 San Diego by season.