| Point Forecast: 2 Miles WSW Portola Valley CA 37.37N 122.25W (Elev. 1473 ft) |
Last Update: 2:42 pm PDT Jul 13, 2025 |
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| Date | 07/13 | 07/14 | ||||||||||||||||||||||
| Hour (PDT) | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 |
| Temperature (°F) | 75 | 74 | 72 | 68 | 64 | 62 | 61 | 59 | 60 | 59 | 58 | 58 | 58 | 58 | 58 | 59 | 59 | 64 | 67 | 70 | 73 | 75 | 76 | 77 |
| Dewpoint (°F) | 57 | 57 | 56 | 54 | 52 | 50 | 50 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 47 | 47 | 48 | 52 | 54 | 55 | 56 | 57 | 57 | 57 |
| Heat Index (°F) | 75 | 75 | 76 | 77 | ||||||||||||||||||||
| Surface Wind (mph) | 5 | 6 | 5 | 5 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 5 |
| Wind Dir | SW | SSW | SW | SW | SSW | SW | SW | SSW | SSW | SW | SW | SW | SW | SW | SSW | SSW | SSW | WSW | WSW | WSW | WSW | WSW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 1 | 1 | 1 | 2 | 9 | 18 | 17 | 16 | 17 | 19 | 22 | 26 | 28 | 27 | 31 | 32 | 25 | 23 | 7 | 2 | 2 | 2 | 0 | 0 |
| 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 (%) | 55 | 55 | 58 | 63 | 66 | 65 | 67 | 67 | 65 | 67 | 67 | 67 | 67 | 66 | 67 | 66 | 67 | 66 | 62 | 58 | 56 | 53 | 52 | 50 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/15 | |||||||||||||||||||||||
| Hour (PDT) | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 |
| Temperature (°F) | 76 | 75 | 72 | 67 | 64 | 61 | 60 | 59 | 58 | 57 | 57 | 56 | 56 | 55 | 55 | 56 | 57 | 60 | 63 | 66 | 68 | 70 | 71 | 72 |
| Dewpoint (°F) | 56 | 56 | 56 | 54 | 52 | 50 | 48 | 48 | 48 | 47 | 47 | 46 | 46 | 46 | 46 | 47 | 48 | 50 | 52 | 54 | 55 | 56 | 56 | 56 |
| Heat Index (°F) | 77 | 75 | ||||||||||||||||||||||
| Surface Wind (mph) | 5 | 6 | 5 | 5 | 5 | 5 | 3 | 3 | 3 | 3 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 |
| Wind Dir | SW | SW | SW | WSW | WSW | WSW | SW | SW | SW | SW | SW | SW | SW | SSW | SSW | SSW | S | S | S | SSW | SSW | SSW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 2 | 2 | 2 | 3 | 8 | 22 | 21 | 20 | 20 | 20 | 27 | 27 | 27 | 43 | 43 | 43 | 34 | 34 | 34 | 9 | 9 | 9 | 6 | 6 |
| Precipitation Potential (%) | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 50 | 50 | 56 | 62 | 64 | 65 | 66 | 68 | 68 | 68 | 69 | 70 | 71 | 72 | 72 | 72 | 72 | 70 | 68 | 66 | 64 | 61 | 59 | 58 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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