Typical Run Score
72
Good
San Francisco · May
Running in San Francisco in May
Typical May running conditions in San Francisco — and a live Run Score so you can see how today compares with the norm.
Avg temperature
56°F
Ideal
Avg dew point
48°F
Comfortable
Best window
6–10 AM
Local time
San Francisco · today vs the May normTemperature · dew point · wind · timing
How May compares in San Francisco
May ranks 10th of 12 months for running in San Francisco, with a typical daytime Run Score of 72 (Good). For reference, the best month is December (score 92) and the hardest is June (score 69). The kindest window in May is typically 6–10 AM. Precipitation falls in roughly 4% of hours this month. Use the live tool below to see how today actually compares with the May norm.
Running weather in nearby cities
Same engine, different climate. Check the best time to run in these cities too.
Running in San Francisco in May: FAQ
Is it good to run in San Francisco in May?
Generally yes, with sensible timing. The typical daytime Run Score is 72 (Good), with temperatures around 56°F (14°C) and comfortable dew points. The best window is usually 6–10 AM.
How hot is it for running in San Francisco in May?
Typical temperatures average 56°F (14°C) (Ideal) with dew points near 48°F. Dew point — not the thermometer — usually decides how hard the run feels.
What is a good Run Score?
Scores run 0–100. 97+ is Perfect, 80–96 is Great — conditions are actively working in your favour. 65–79 (Good) is solid. 45–64 (Mixed) means at least one factor — usually heat or dew point — is taxing you. Below 45 (Poor), expect a noticeably harder effort or hold back for safety.
Why does dew point matter more than temperature?
Your body cools by evaporating sweat. When the dew point climbs above roughly 60°F, the air is too saturated for sweat to evaporate efficiently, so heat builds up even if the thermometer looks reasonable. That's why a 70°F muggy morning can feel harder than a dry 80°F afternoon.
Get this on every run, automatically
RunWeather syncs with Strava, plans your week, and learns your heat tolerance — so the right time to run finds you.