| Point Forecast: 4 Miles S Portola Valley CA 37.33N 122.21W (Elev. 2231 ft) |
Last Update: 1:26 am PDT May 28, 2024 |
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| Date | 05/28 | 05/29 | ||||||||||||||||||||||
| Hour (PDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°F) | 51 | 50 | 50 | 50 | 48 | 50 | 51 | 52 | 54 | 55 | 56 | 55 | 55 | 57 | 55 | 55 | 54 | 52 | 51 | 50 | 50 | 51 | 52 | 51 |
| Dewpoint (°F) | 42 | 41 | 42 | 41 | 40 | 41 | 42 | 42 | 44 | 46 | 48 | 48 | 48 | 49 | 48 | 47 | 47 | 44 | 42 | 41 | 41 | 40 | 40 | 40 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 7 | 7 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 |
| Wind Dir | W | W | W | WNW | W | W | WNW | W | W | W | W | W | W | W | W | W | W | W | W | W | W | WNW | W | W |
| Gust | 18 | 18 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 18 | 18 | 20 | ||||||||||
| Sky Cover (%) | 48 | 36 | 30 | 35 | 56 | 49 | 29 | 24 | 9 | 5 | 6 | 7 | 8 | 8 | 18 | 17 | 15 | 13 | 18 | 20 | 21 | 18 | 16 | 18 |
| Precipitation Potential (%) | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
| Relative Humidity (%) | 72 | 72 | 74 | 72 | 74 | 71 | 70 | 70 | 70 | 72 | 74 | 76 | 78 | 75 | 76 | 75 | 77 | 74 | 70 | 70 | 69 | 66 | 63 | 66 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 05/30 | |||||||||||||||||||||||
| Hour (PDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°F) | 50 | 50 | 50 | 47 | 49 | 50 | 51 | 53 | 55 | 56 | 58 | 60 | 60 | 61 | 61 | 60 | 59 | 57 | 56 | 55 | 55 | 55 | 54 | 54 |
| Dewpoint (°F) | 39 | 39 | 39 | 37 | 39 | 39 | 38 | 42 | 43 | 44 | 46 | 48 | 48 | 49 | 49 | 48 | 47 | 45 | 43 | 41 | 40 | 39 | 39 | 39 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 8 | 7 | 7 | 7 |
| Wind Dir | NW | W | W | NW | WNW | NW | NW | NW | NW | NW | NW | NW | NW | NW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | W |
| Gust | 20 | 20 | 18 | 18 | 18 | 18 | 20 | 21 | 21 | 21 | 21 | 20 | 18 | |||||||||||
| Sky Cover (%) | 15 | 13 | 15 | 16 | 12 | 9 | 12 | 9 | 6 | 3 | 4 | 4 | 5 | 5 | 4 | 4 | 8 | 12 | 16 | 16 | 15 | 15 | 14 | 13 |
| 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 | 66 | 66 | 67 | 67 | 65 | 61 | 64 | 65 | 64 | 64 | 64 | 64 | 65 | 66 | 66 | 65 | 63 | 61 | 59 | 56 | 55 | 55 | 57 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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