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| Point Forecast: 4 Miles S Clayton CA 37.87N 121.92W (Elev. 2818 ft) |
Last Update: 3:03 pm PDT Jul 28, 2021 |
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| Date | 07/28 | 07/29 | ||||||||||||||||||||||
| Hour (PDT) | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| Temperature (°F) | 79 | 78 | 78 | 78 | 78 | 79 | 79 | 79 | 79 | 79 | 79 | 78 | 78 | 78 | 77 | 80 | 80 | 80 | 80 | 80 | 81 | 81 | 83 | 82 |
| Dewpoint (°F) | 44 | 44 | 42 | 38 | 36 | 36 | 37 | 37 | 37 | 37 | 36 | 35 | 34 | 35 | 36 | 36 | 37 | 41 | 43 | 44 | 45 | 46 | 44 | 43 |
| Heat Index (°F) | 79 | 79 | 78 | 78 | 78 | 79 | 79 | 78 | 78 | 78 | 79 | 79 | 78 | 78 | 77 | 78 | 79 | 79 | 79 | 79 | 80 | 80 | 81 | 80 |
| Surface Wind (mph) | 14 | 14 | 13 | 14 | 14 | 14 | 14 | 13 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 9 | 10 | 11 | 14 |
| Wind Dir | W | W | W | W | W | W | W | W | WNW | WNW | WNW | WNW | WNW | WNW | WNW | NW | NW | NW | WNW | WNW | W | W | W | W |
| Gust | 20 | 20 | 20 | 20 | 22 | 22 | 20 | 20 | 18 | 21 | ||||||||||||||
| Sky Cover (%) | 31 | 25 | 25 | 33 | 26 | 29 | 19 | 24 | 23 | 39 | 51 | 49 | 37 | 38 | 19 | 14 | 15 | 1 | 15 | 7 | 1 | 3 | 1 | 3 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 28 | 30 | 28 | 23 | 22 | 21 | 22 | 22 | 22 | 22 | 22 | 21 | 20 | 21 | 22 | 20 | 22 | 25 | 27 | 29 | 28 | 29 | 25 | 25 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/30 | |||||||||||||||||||||||
| Hour (PDT) | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| Temperature (°F) | 82 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 79 | 79 | 78 | 78 | 79 | 79 | 79 | 79 | 79 | 80 | 80 | 81 | 81 | 80 |
| Dewpoint (°F) | 42 | 42 | 39 | 36 | 33 | 33 | 34 | 35 | 35 | 35 | 34 | 33 | 33 | 33 | 33 | 34 | 36 | 38 | 40 | 42 | 44 | 44 | 44 | 42 |
| Heat Index (°F) | 80 | 79 | 79 | 78 | 79 | 79 | 79 | 79 | 79 | 79 | 78 | 79 | 78 | 78 | 79 | 79 | 79 | 79 | 78 | 79 | 79 | 79 | 79 | 79 |
| Surface Wind (mph) | 15 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 11 | 11 | 11 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 15 | 15 | 15 |
| Wind Dir | W | W | W | W | W | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | W | W | W | W | W | W | W | W | W |
| Gust | 23 | 25 | 25 | 25 | 25 | 26 | 24 | 24 | 24 | 18 | 18 | 18 | 23 | 23 | 23 | |||||||||
| Sky Cover (%) | 3 | 1 | 5 | 3 | 1 | 1 | 2 | 2 | 2 | 8 | 8 | 8 | 10 | 10 | 10 | 9 | 9 | 9 | 13 | 13 | 13 | 15 | 15 | 15 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 24 | 25 | 23 | 20 | 18 | 18 | 19 | 19 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 20 | 21 | 23 | 25 | 27 | 28 | 28 | 27 | 26 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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