| Point Forecast: 2 Miles WSW Portola Valley CA 37.37N 122.25W (Elev. 1473 ft) |
Last Update: 5:55 am PDT Jun 21, 2025 |
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| Date | 06/21 | 06/22 | ||||||||||||||||||||||
| Hour (PDT) | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 |
| Temperature (°F) | 49 | 50 | 52 | 54 | 56 | 58 | 61 | 62 | 63 | 64 | 64 | 63 | 62 | 60 | 58 | 55 | 53 | 52 | 53 | 52 | 52 | 51 | 50 | 50 |
| Dewpoint (°F) | 39 | 40 | 42 | 44 | 43 | 44 | 46 | 46 | 46 | 47 | 47 | 46 | 47 | 46 | 44 | 42 | 41 | 41 | 41 | 40 | 40 | 39 | 39 | 39 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 9 | 11 | 11 | 10 | 10 | 10 | 11 | 13 | 14 | 15 | 16 | 16 | 17 | 17 | 15 | 8 | 7 | 5 | 5 | 6 | 8 | 8 | 7 | 7 |
| Wind Dir | NNW | NNW | N | N | NNW | NNW | NNW | NW | NW | WNW | WNW | WNW | WNW | WNW | WNW | W | W | NW | WNW | NNW | NNW | NNW | NW | NNW |
| Gust | 25 | 22 | 18 | 18 | 21 | 23 | 22 | 23 | 22 | 18 | ||||||||||||||
| Sky Cover (%) | 12 | 12 | 11 | 14 | 7 | 3 | 3 | 2 | 4 | 3 | 2 | 3 | 4 | 4 | 5 | 7 | 6 | 5 | 5 | 5 | 5 | 3 | 4 | 4 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 68 | 68 | 68 | 67 | 62 | 60 | 58 | 57 | 54 | 54 | 54 | 54 | 57 | 59 | 60 | 62 | 64 | 65 | 63 | 63 | 62 | 63 | 66 | 65 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 06/23 | |||||||||||||||||||||||
| Hour (PDT) | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 |
| Temperature (°F) | 49 | 51 | 52 | 55 | 59 | 60 | 63 | 64 | 64 | 65 | 65 | 64 | 61 | 58 | 56 | 54 | 53 | 52 | 51 | 51 | 51 | 51 | 50 | 50 |
| Dewpoint (°F) | 38 | 39 | 41 | 44 | 46 | 46 | 48 | 49 | 49 | 49 | 49 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 42 | 42 | 42 | 42 | 42 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 7 | 6 | 5 | 5 | 5 | 7 | 7 | 7 | 13 | 13 | 13 | 14 | 14 | 14 | 11 | 11 | 11 | 9 | 9 | 9 | 7 | 7 | 7 | 5 |
| Wind Dir | W | W | WNW | WNW | WNW | WNW | WNW | WNW | W | W | W | W | W | W | W | W | W | W | W | W | WSW | WSW | WSW | WSW |
| Gust | 20 | 20 | 20 | |||||||||||||||||||||
| Sky Cover (%) | 12 | 14 | 12 | 17 | 8 | 5 | 5 | 5 | 2 | 2 | 2 | 4 | 4 | 4 | 14 | 14 | 14 | 31 | 31 | 31 | 49 | 49 | 49 | 50 |
| 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 (%) | 65 | 65 | 66 | 65 | 63 | 60 | 58 | 57 | 57 | 56 | 57 | 58 | 62 | 66 | 70 | 71 | 72 | 72 | 71 | 71 | 70 | 71 | 72 | 74 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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