| Point Forecast: Castro Valley CA 37.69N 122.05W (Elev. 364 ft) |
Last Update: 2:42 pm PDT Jul 13, 2025 |
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| Date | 07/13 | 07/14 | ||||||||||||||||||||||
| 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 (°F) | 60 | 59 | 58 | 57 | 57 | 57 | 57 | 56 | 56 | 56 | 57 | 58 | 61 | 64 | 69 | 75 | 78 | 79 | 80 | 79 | 77 | 74 | 69 | 64 |
| Dewpoint (°F) | 55 | 55 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 55 | 56 | 57 | 58 | 59 | 59 | 58 | 59 | 58 | 58 | 59 | 56 | 55 |
| Heat Index (°F) | 75 | 78 | 79 | 81 | 79 | 77 | ||||||||||||||||||
| Surface Wind (mph) | 7 | 6 | 6 | 6 | 5 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 6 | 6 | 7 | 8 | 9 | 9 | 10 | 10 | 9 | 8 | 8 |
| Wind Dir | WNW | WNW | W | W | W | W | W | W | W | W | W | WSW | W | WSW | WSW | W | W | W | W | W | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 40 | 57 | 70 | 73 | 77 | 77 | 79 | 78 | 78 | 78 | 77 | 73 | 58 | 33 | 8 | 6 | 4 | 2 | 2 | 3 | 3 | 3 | 4 | 19 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 84 | 87 | 89 | 89 | 90 | 91 | 90 | 92 | 91 | 92 | 91 | 90 | 85 | 78 | 68 | 58 | 53 | 49 | 49 | 49 | 52 | 58 | 64 | 73 |
| Rain | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/15 | |||||||||||||||||||||||
| 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 (°F) | 60 | 58 | 58 | 57 | 57 | 57 | 56 | 56 | 56 | 56 | 56 | 57 | 60 | 63 | 67 | 70 | 73 | 75 | 75 | 75 | 73 | 70 | 66 | 62 |
| Dewpoint (°F) | 55 | 55 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 55 | 56 | 56 | 57 | 58 | 59 | 60 | 60 | 59 | 59 | 58 | 57 | 56 |
| Heat Index (°F) | 75 | 75 | 75 | |||||||||||||||||||||
| Surface Wind (mph) | 8 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 8 | 8 | 8 | 10 | 10 | 10 | 11 | 11 | 11 | 10 |
| Wind Dir | W | W | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | SW | SW | SW | WSW | WSW | WSW | WSW | WSW | WSW | W | W | W | WSW |
| Gust | 18 | 18 | 18 | 18 | 18 | 18 | ||||||||||||||||||
| Sky Cover (%) | 42 | 46 | 49 | 49 | 49 | 66 | 66 | 66 | 80 | 80 | 80 | 60 | 60 | 60 | 15 | 15 | 15 | 2 | 2 | 2 | 4 | 4 | 4 | 17 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 84 | 88 | 88 | 89 | 89 | 90 | 90 | 91 | 92 | 93 | 93 | 91 | 85 | 78 | 72 | 66 | 62 | 59 | 58 | 59 | 62 | 67 | 73 | 80 |
| Rain | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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