| Point Forecast: Antioch CA 38N 121.81W (Elev. 36 ft) |
Last Update: 2:51 am PDT Sep 10, 2026 |
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| Date | 09/10 | 09/11 | ||||||||||||||||||||||
| Hour (PDT) | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 |
| Temperature (°F) | 79 | 80 | 83 | 88 | 91 | 92 | 93 | 95 | 95 | 95 | 94 | 91 | 89 | 85 | 82 | 79 | 77 | 76 | 74 | 72 | 70 | 68 | 67 | 67 |
| Dewpoint (°F) | 51 | 52 | 52 | 53 | 54 | 55 | 54 | 54 | 53 | 53 | 52 | 51 | 51 | 49 | 49 | 49 | 50 | 51 | 52 | 53 | 54 | 53 | 54 | 54 |
| Heat Index (°F) | 79 | 80 | 82 | 85 | 89 | 90 | 91 | 93 | 92 | 92 | 92 | 89 | 86 | 83 | 80 | 79 | 77 | 76 | ||||||
| Surface Wind (mph) | 6 | 7 | 8 | 11 | 13 | 14 | 15 | 15 | 16 | 15 | 15 | 14 | 13 | 13 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 9 | 9 |
| Wind Dir | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | WSW | W | WSW | WSW | W | W | WSW | WSW | WSW |
| Gust | 20 | 23 | 24 | 25 | 26 | 26 | 26 | 26 | 25 | 23 | 23 | 22 | 23 | 23 | 22 | 22 | 21 | 20 | 18 | 18 | 18 | |||
| Sky Cover (%) | 46 | 32 | 41 | 25 | 38 | 24 | 13 | 21 | 18 | 28 | 21 | 21 | 18 | 10 | 30 | 5 | 3 | 2 | 1 | 2 | 5 | 4 | 8 | 8 |
| Precipitation Potential (%) | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 38 | 38 | 35 | 31 | 29 | 28 | 27 | 25 | 24 | 24 | 24 | 25 | 27 | 29 | 32 | 35 | 38 | 42 | 46 | 51 | 56 | 59 | 62 | 64 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 09/12 | |||||||||||||||||||||||
| Hour (PDT) | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 |
| Temperature (°F) | 66 | 67 | 70 | 75 | 80 | 82 | 84 | 86 | 86 | 86 | 85 | 83 | 79 | 76 | 73 | 72 | 70 | 69 | 67 | 66 | 65 | 64 | 63 | 63 |
| Dewpoint (°F) | 55 | 56 | 55 | 56 | 58 | 58 | 57 | 57 | 57 | 57 | 56 | 54 | 53 | 52 | 51 | 50 | 50 | 50 | 50 | 50 | 50 | 51 | 51 | 52 |
| Heat Index (°F) | 75 | 80 | 82 | 83 | 85 | 85 | 85 | 84 | 82 | 79 | 76 | |||||||||||||
| Surface Wind (mph) | 9 | 9 | 9 | 9 | 13 | 13 | 13 | 15 | 15 | 15 | 14 | 14 | 14 | 11 | 11 | 11 | 10 | 10 | 10 | 11 | 11 | 11 | 15 | 15 |
| Wind Dir | WSW | WSW | WSW | WSW | W | W | W | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | SW | SW | SW | SW | SW | SW | SW | SW |
| Gust | 18 | 20 | 20 | 20 | 23 | 23 | 23 | 25 | 25 | 25 | 24 | 24 | 24 | 21 | 21 | 21 | 18 | 18 | 18 | 21 | 21 | 21 | 26 | 26 |
| Sky Cover (%) | 8 | 7 | 7 | 7 | 2 | 2 | 2 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 1 | 1 | 1 | 11 | 11 |
| 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 (%) | 67 | 67 | 60 | 52 | 47 | 44 | 41 | 37 | 37 | 37 | 37 | 38 | 41 | 44 | 46 | 47 | 49 | 51 | 53 | 56 | 59 | 62 | 64 | 67 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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