San Francisco
United States · North America
Year-round range: 46°F to 73°F
May
Excellent conditions this month
Your monthly fit score
Comfort fit by month.
Climate details▼
Temperature
Average highs and lows.
May has comfortable temperatures — not too hot, not too cold.
Shaded band = typical daily swing (P10 of night lows to P90 of afternoon peaks) — spans wider than avg high/low lines because it captures day-to-day variation.
| = MayRainfall
Monthly rain and rain days.
May is one of the driest months — very little rain expected.
Sunshine
Average hours of bright sun per day.
May is one of the sunniest months — great for outdoor plans.
Clear sky
Clear-sky share is the inverse of average cloud cover (100% minus cloud cover). Band labels follow standard meteorological categories; distribution within each band varies by day.
Air comfort by month
Humidity and heat feel by month.
May is mostly comfortable — low heat and humidity pressure.
Time-of-day patterns
Typical hourly rhythm for May.
Temperature by hour
Temperature by hour and month
Typical temperature through the day across the year (1996-2025 normals, local time). Shaded cells are nighttime.
In May, afternoons reach about 66° and nights settle near 54°.
▶Full month-by-month data
| Month | High °F | Low °F | Rain days | Rain (in) | Sun h/day | Humidity | Sea °F |
|---|---|---|---|---|---|---|---|
| Jan | 58°F | 46°F | 9 | 3.8in | 4.8h | 81.14285714285714% | 52°F |
| Feb | 59°F | 47°F | 9 | 3.8in | 5.5h | 79% | 53°F |
| Mar | 61°F | 49°F | 9 | 2.9in | 6.3h | 78.14285714285714% | 55°F |
| Apr | 63°F | 50°F | 5 | 1.3in | 8.2h | 75.57142857142857% | 56°F |
| May | 66°F | 52°F | 2 | 0.5in | 9.1h | 74.71428571428571% | 55°F |
| Jun | 69°F | 55°F | 1 | 0.1in | 10.9h | 74.57142857142856% | 56°F |
| Jul | 71°F | 57°F | 0 | 0.0in | 10.5h | 76.57142857142857% | 58°F |
| Aug | 72°F | 58°F | 0 | 0.0in | 9.5h | 76.57142857142857% | 60°F |
| Sep | 73°F | 58°F | 0 | 0.1in | 9.6h | 75.71428571428571% | 60°F |
| Oct | 70°F | 56°F | 3 | 0.8in | 8.2h | 73.57142857142857% | 59°F |
| Nov | 63°F | 51°F | 6 | 2.0in | 6.1h | 77.71428571428571% | 57°F |
| Dec | 58°F | 47°F | 12 | 4.3in | 5h | 81.42857142857143% | 54°F |