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| Point Forecast: 2 Miles SW Union City CA 37.58N 122.04W (Elev. 37 m) |
Last Update: 8:50 pm PDT Sep 27, 2023 |
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| Date | 09/27 | 09/28 | ||||||||||||||||||||||
| 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 (°C) | 17 | 16 | 16 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 14 | 16 | 18 | 19 | 22 | 23 | 24 | 24 | 23 | 23 | 22 | 19 | 18 |
| Dewpoint (°C) | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 13 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 12 |
| Heat Index (°C) | 24 | 24 | ||||||||||||||||||||||
| Surface Wind (mph) | 10 | 8 | 7 | 7 | 6 | 5 | 5 | 3 | 2 | 2 | 2 | 2 | 2 | 3 | 6 | 7 | 9 | 11 | 13 | 14 | 14 | 14 | 10 | 9 |
| Wind Dir | W | W | WSW | WSW | WSW | SW | S | S | SSE | N | NE | NW | WSW | W | W | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 18 | 15 | 17 | 21 | 26 | 29 | 33 | 31 | 17 | 17 | 21 | 16 | 24 | 16 | 12 | 6 | 5 | 3 | 2 | 2 | 2 | 3 | 4 | 5 |
| 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 (%) | 83 | 82 | 83 | 84 | 86 | 84 | 86 | 86 | 86 | 87 | 89 | 86 | 78 | 70 | 63 | 57 | 51 | 48 | 48 | 50 | 53 | 59 | 66 | 72 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 09/29 | |||||||||||||||||||||||
| 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 (°C) | 17 | 16 | 16 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 17 | 18 | 20 | 21 | 22 | 22 | 21 | 21 | 19 | 18 | 17 | 16 |
| Dewpoint (°C) | 12 | 13 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 13 | 14 | 15 | 16 | 16 | 16 | 16 | 17 | 16 | 16 | 15 | 14 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 8 | 6 | 6 | 6 | 6 | 3 | 3 | 3 | 3 | 3 | 3 | 6 | 6 | 6 | 11 | 11 | 11 | 17 | 17 | 17 | 15 | 15 | 15 | 13 |
| Wind Dir | W | WSW | WSW | WSW | WSW | WSW | WSW | WSW | SSW | SSW | SSW | WSW | WSW | WSW | W | W | W | W | W | W | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 4 | 4 | 5 | 5 | 5 | 9 | 9 | 9 | 30 | 30 | 30 | 14 | 14 | 14 | 57 | 57 | 57 | 46 | 46 | 46 | 59 | 59 | 59 | 72 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 14 | 14 | 14 | 14 |
| Relative Humidity (%) | 74 | 79 | 80 | 80 | 81 | 82 | 82 | 83 | 84 | 85 | 85 | 84 | 81 | 76 | 73 | 70 | 70 | 70 | 73 | 77 | 81 | 85 | 88 | 90 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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