| Point Forecast: Antioch CA 38N 121.81W (Elev. 11 m) |
Last Update: 9:36 pm PDT Aug 9, 2026 |
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| Date | 08/09 | 08/10 | ||||||||||||||||||||||
| Hour (PDT) | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| Temperature (°C) | 27 | 26 | 26 | 24 | 23 | 22 | 21 | 21 | 20 | 20 | 21 | 23 | 26 | 28 | 29 | 31 | 32 | 33 | 33 | 33 | 32 | 31 | 27 | 25 |
| Dewpoint (°C) | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 14 | 15 | 15 | 16 | 15 | 15 | 15 | 15 | 15 | 14 | 13 | 13 |
| Heat Index (°C) | 27 | 26 | 26 | 24 | 26 | 28 | 29 | 31 | 32 | 33 | 33 | 33 | 32 | 30 | 27 | 25 | ||||||||
| Surface Wind (mph) | 8 | 8 | 7 | 6 | 5 | 5 | 5 | 3 | 5 | 5 | 5 | 6 | 7 | 7 | 8 | 9 | 10 | 11 | 11 | 13 | 11 | 10 | 9 | 9 |
| Wind Dir | W | W | W | W | W | W | W | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | W | W | W | W | W | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 4 | 2 | 1 | 0 | 1 | 3 | 15 | 20 | 17 | 12 | 18 | 10 | 7 | 10 | 6 | 8 | 7 | 9 | 9 | 6 | 12 | 15 | 12 | 7 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 37 | 40 | 42 | 45 | 49 | 54 | 57 | 59 | 61 | 64 | 61 | 55 | 49 | 46 | 42 | 38 | 35 | 34 | 33 | 33 | 36 | 37 | 41 | 46 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 08/11 | |||||||||||||||||||||||
| Hour (PDT) | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| Temperature (°C) | 24 | 23 | 23 | 22 | 21 | 20 | 19 | 19 | 18 | 19 | 19 | 21 | 23 | 26 | 28 | 30 | 31 | 32 | 32 | 32 | 31 | 28 | 27 | 25 |
| Dewpoint (°C) | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 14 | 14 | 13 |
| Heat Index (°C) | 24 | 26 | 28 | 30 | 31 | 32 | 32 | 32 | 30 | 28 | 27 | 25 | ||||||||||||
| Surface Wind (mph) | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 3 | 3 | 3 | 5 | 5 | 5 | 7 | 7 | 7 | 11 | 11 | 11 | 11 | 11 | 11 | 9 | 9 |
| Wind Dir | W | WNW | WNW | WNW | WNW | W | WNW | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 3 | 1 | 1 | 1 | 2 | 2 | 2 | 6 | 6 | 6 | 8 | 8 | 8 | 5 | 5 | 5 | 3 | 3 | 3 | 4 | 4 | 4 | 3 | 3 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 50 | 52 | 54 | 56 | 60 | 65 | 69 | 70 | 71 | 72 | 70 | 66 | 60 | 54 | 48 | 43 | 39 | 37 | 36 | 37 | 39 | 42 | 46 | 49 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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