Will it rain in
San Diego today?
Live hourly rain forecast and run verdict for San Diego, California, US.
Running in San Diego means enjoying some of the best running weather in the country — but the marine layer and occasional rain still catch you out. Whether it's morning fog along Mission Bay, a rare winter storm, or a warm Santa Ana wind day, knowing whether to head out before you lace up matters. RainOrRun checks live conditions in San Diego right now and gives you an instant verdict — plus the best hourly window if the weather's on the fence. We'll also recommend the right gear for whatever San Diego's near-perfect climate is throwing at you today.
What to wear
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How often does it rain in San Diego?
San Diego records around 336mm of rain a year, spread across about 37 days — roughly 10% of all days, or 3 days in an average month. Rain is rarely the thing that stops a run in San Diego. You can plan a training week without building it around the forecast, and a packable jacket is more insurance policy than staple.
The wettest month is January, averaging 73mm across about 6 rainy days. The driest is June, with 2mm over roughly 0 days. Even in January, average lows stay around 8.8°C, so cold is rarely the limiting factor here. Summer highs peak around 25.5°C in August, comfortable for most daytime running.
Those are ten-year averages, not a forecast. What actually matters on the day is the next twelve hours — which is what the live verdict and hourly strip at the top of this page are for.
| Month | Rainfall | Rainy days | Avg high | Avg low |
|---|---|---|---|---|
| January | 73mm | 6 | 17.6°C | 8.8°C |
| February | 54mm | 5 | 18.1°C | 9°C |
| March | 56mm | 8 | 18.3°C | 10.6°C |
| April | 21mm | 3 | 19.9°C | 12.5°C |
| May | 16mm | 3 | 19.8°C | 14°C |
| June | 2mm | 0 | 22.3°C | 16°C |
| July | 5mm | 0 | 24.5°C | 18.3°C |
| August | 6mm | 0 | 25.5°C | 19°C |
| September | 11mm | 1 | 25.4°C | 18.3°C |
| October | 9mm | 2 | 24.2°C | 15.5°C |
| November | 28mm | 4 | 21.2°C | 11.5°C |
| December | 55mm | 5 | 18°C | 9.1°C |
Historical data: Open-Meteo archive, 2015–2024. A “rainy day” means at least 1mm of precipitation.
Running in San Diego: common questions
Will it rain in San Diego today?
The forecast card at the top of this page shows San Diego's rain probability for the current hour, plus an hour-by-hour breakdown for the rest of the day, using live Open-Meteo data. Historically, San Diego sees rain on about 37 days a year, so on any given day there is roughly a 10% chance of some rain falling.
Is it a good day to run in San Diego?
RainOrRun scores the live San Diego forecast on rain probability, rainfall amount, temperature, wind speed and severe weather, then returns a single verdict: Go, Maybe, or Don't Bother. A Maybe means conditions are borderline and it is worth picking your window rather than skipping the run.
What is the best time to run in San Diego today?
The hourly strip above highlights the best single window of the day for San Diego — the hour combining the lowest rain probability with the most comfortable temperature. You can also check up to eight days ahead using the date picker if you are planning a long run or a race.
What should I wear running in San Diego today?
The gear section on this page updates with the live San Diego forecast: a waterproof jacket and peaked cap when rain probability goes above 40%, a thermal base layer and gloves below 8 degrees Celsius, and a high-vis vest when wind or low light make you harder to see.
What is the wettest month in San Diego?
January is the wettest month in San Diego, averaging 73mm of rain across about 6 rainy days. June is the driest, with around 2mm over roughly 0 days. Figures are ten-year averages covering 2015 to 2024.
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