| Point Forecast: 6 Miles SSW Discovery Bay CA 37.83N 121.62W (Elev. 11 m) |
Last Update: 1:26 pm PDT Jul 18, 2026 |
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| Date | 07/18 | 07/19 | ||||||||||||||||||||||
| 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 (°C) | 32 | 31 | 29 | 26 | 23 | 21 | 20 | 19 | 19 | 18 | 17 | 17 | 17 | 16 | 17 | 18 | 20 | 23 | 26 | 28 | 31 | 32 | 33 | 33 |
| Dewpoint (°C) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 11 | 12 | 11 | 12 | 12 | 12 | 12 | 11 | 11 | 10 |
| Heat Index (°C) | 30 | 29 | 28 | 25 | 26 | 28 | 29 | 31 | 31 | 32 | ||||||||||||||
| Surface Wind (mph) | 11 | 11 | 11 | 11 | 13 | 13 | 13 | 10 | 9 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 8 | 9 | 10 |
| Wind Dir | W | W | W | W | W | WSW | WSW | WSW | WSW | W | W | W | W | W | W | W | W | W | W | W | W | W | WSW | WSW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 1 | 1 | 0 | 0 | 0 | 5 | 9 | 20 | 24 | 17 | 26 | 27 | 26 | 19 | 12 | 20 | 12 | 11 | 21 | 12 | 16 | 16 | 11 | 13 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 27 | 29 | 33 | 40 | 46 | 51 | 55 | 58 | 61 | 63 | 65 | 67 | 69 | 69 | 69 | 67 | 58 | 50 | 42 | 36 | 32 | 28 | 25 | 24 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/20 | |||||||||||||||||||||||
| 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 (°C) | 33 | 32 | 30 | 26 | 24 | 23 | 23 | 23 | 22 | 22 | 20 | 19 | 19 | 18 | 18 | 20 | 22 | 24 | 26 | 28 | 29 | 31 | 32 | 32 |
| Dewpoint (°C) | 9 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 11 | 12 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 |
| Heat Index (°C) | 31 | 30 | 29 | 26 | 24 | 24 | 26 | 27 | 29 | 30 | 31 | 31 | ||||||||||||
| Surface Wind (mph) | 11 | 11 | 11 | 11 | 11 | 11 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 6 | 6 | 6 | 7 | 7 | 7 | 9 | 9 | 9 |
| Wind Dir | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | W | W | W | WNW | WNW | WNW | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 33 | 33 | 33 | 51 | 51 | 51 | 48 | 48 | 48 | 46 | 46 | 46 | 42 | 42 | 42 | 30 | 30 | 30 | 29 | 29 | 29 | 19 | 19 | 19 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 24 | 26 | 31 | 38 | 42 | 44 | 46 | 49 | 51 | 54 | 58 | 61 | 63 | 64 | 65 | 64 | 59 | 52 | 44 | 39 | 34 | 31 | 29 | 28 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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