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| Point Forecast: San Francisco International Airport CA 37.62N 122.37W (Elev. 3 ft) |
Last Update: 3:19 pm PDT Jul 24, 2021 |
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| Date | 07/24 | 07/25 | ||||||||||||||||||||||
| Hour (PDT) | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Temperature (°F) | 59 | 59 | 59 | 58 | 58 | 58 | 57 | 57 | 57 | 56 | 57 | 60 | 62 | 64 | 66 | 68 | 70 | 71 | 71 | 70 | 69 | 67 | 65 | 62 |
| Dewpoint (°F) | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 51 | 51 | 51 | 52 | 51 | 52 | 52 | 53 | 53 | 53 | 53 | 52 | 53 | 52 | 53 | 52 | 52 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 9 | 7 | 5 | 1 | 2 | 2 | 1 | 1 | 2 | 2 | 3 | 3 | 2 | 2 | 2 | 1 | 3 | 6 | 7 | 8 | 8 | 7 | 7 | 7 |
| Wind Dir | W | W | W | W | NNE | NNE | NNE | N | NNE | NNE | NNE | NE | E | ESE | E | SE | SSW | SW | WSW | WSW | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 30 | 37 | 41 | 44 | 49 | 49 | 46 | 43 | 49 | 63 | 22 | 25 | 54 | 36 | 35 | 27 | 24 | 18 | 20 | 10 | 7 | 9 | 14 | 17 |
| Precipitation Potential (%) | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Relative Humidity (%) | 77 | 77 | 79 | 80 | 81 | 81 | 82 | 81 | 80 | 82 | 82 | 74 | 70 | 66 | 62 | 58 | 55 | 53 | 52 | 54 | 56 | 60 | 65 | 71 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/26 | |||||||||||||||||||||||
| Hour (PDT) | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Temperature (°F) | 61 | 61 | 60 | 60 | 60 | 60 | 59 | 59 | 59 | 60 | 60 | 62 | 63 | 65 | 67 | 69 | 70 | 71 | 71 | 70 | 69 | 67 | 65 | 63 |
| Dewpoint (°F) | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 52 | 52 | 53 | 53 | 53 | 54 | 54 | 54 | 54 | 54 | 53 | 53 | 53 | 53 | 53 | 53 | 53 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 7 | 5 | 5 | 5 | 5 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 9 | 9 | 9 | 10 | 10 | 10 | 5 | 5 | 5 | 8 |
| Wind Dir | W | WNW | NW | NW | NW | NNW | NNW | NNW | WNW | WNW | WNW | S | S | S | SW | SW | SW | SW | SW | SW | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 22 | 33 | 44 | 44 | 44 | 56 | 56 | 56 | 60 | 60 | 60 | 44 | 44 | 44 | 47 | 47 | 47 | 35 | 35 | 35 | 41 | 41 | 41 | 63 |
| Precipitation Potential (%) | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 15 | 15 | 15 | 15 |
| Relative Humidity (%) | 73 | 75 | 76 | 77 | 78 | 78 | 79 | 79 | 79 | 78 | 76 | 74 | 71 | 67 | 63 | 59 | 56 | 53 | 53 | 54 | 56 | 60 | 66 | 70 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc |
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