| Point Forecast: San Francisco International Airport CA 37.62N 122.37W (Elev. 3 ft) |
Last Update: 11:26 pm PDT Jul 19, 2026 |
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| Date | 07/20 | |||||||||||||||||||||||
| Hour (PDT) | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Temperature (°F) | 60 | 60 | 60 | 59 | 59 | 59 | 59 | 59 | 61 | 63 | 66 | 68 | 70 | 72 | 72 | 72 | 72 | 71 | 70 | 67 | 65 | 63 | 62 | 62 |
| Dewpoint (°F) | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 56 | 57 | 58 | 58 | 56 | 56 | 56 | 56 | 57 | 56 | 56 | 56 | 56 | 55 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 6 | 7 | 8 | 10 | 11 | 14 | 14 | 14 | 13 | 11 | 9 | 7 | 6 | 6 |
| Wind Dir | W | W | W | W | W | W | W | W | W | W | WNW | WNW | WNW | WNW | W | W | W | W | W | W | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 56 | 60 | 72 | 67 | 71 | 74 | 83 | 90 | 82 | 64 | 76 | 68 | 66 | 51 | 49 | 39 | 56 | 72 | 71 | 64 | 69 | 56 | 43 | 54 |
| Precipitation Potential (%) | 0 | 0 | 2 | 2 | 1 | 1 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 4 | 3 | 3 | 3 | 2 | 2 |
| Relative Humidity (%) | 84 | 84 | 86 | 86 | 86 | 86 | 88 | 86 | 80 | 77 | 72 | 69 | 65 | 61 | 56 | 56 | 57 | 59 | 63 | 67 | 71 | 76 | 79 | 79 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/21 | |||||||||||||||||||||||
| Hour (PDT) | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Temperature (°F) | 61 | 60 | 60 | 59 | 59 | 59 | 59 | 59 | 62 | 64 | 68 | 71 | 74 | 78 | 79 | 79 | 79 | 78 | 76 | 73 | 70 | 68 | 66 | 65 |
| Dewpoint (°F) | 55 | 55 | 55 | 54 | 54 | 54 | 55 | 54 | 54 | 55 | 56 | 56 | 57 | 56 | 55 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 |
| Heat Index (°F) | 78 | 79 | 79 | 80 | 78 | 76 | ||||||||||||||||||
| Surface Wind (mph) | 6 | 6 | 5 | 5 | 5 | 2 | 2 | 2 | 2 | 2 | 2 | 7 | 7 | 7 | 11 | 11 | 11 | 13 | 13 | 13 | 10 | 10 | 10 | 7 |
| Wind Dir | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | WSW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 52 | 61 | 65 | 64 | 71 | 78 | 78 | 78 | 73 | 73 | 73 | 43 | 43 | 43 | 25 | 25 | 25 | 11 | 11 | 11 | 13 | 13 | 13 | 16 |
| Precipitation Potential (%) | 2 | 2 | 2 | 2 | 1 | 2 | 2 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 81 | 83 | 84 | 84 | 84 | 84 | 86 | 84 | 76 | 71 | 64 | 60 | 54 | 48 | 43 | 41 | 42 | 44 | 48 | 52 | 56 | 60 | 64 | 68 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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