| Point Forecast: 2 Miles WSW Portola Valley CA 37.37N 122.25W (Elev. 449 m) |
Last Update: 1:26 pm PDT Jul 16, 2025 |
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| Date | 07/16 | 07/17 | ||||||||||||||||||||||
| Hour (PDT) | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 |
| Temperature (°C) | 18 | 19 | 19 | 18 | 18 | 17 | 15 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 13 | 14 | 16 | 17 | 19 | 21 |
| Dewpoint (°C) | 13 | 12 | 13 | 13 | 12 | 12 | 11 | 9 | 9 | 9 | 9 | 8 | 9 | 8 | 8 | 8 | 8 | 8 | 9 | 10 | 12 | 12 | 13 | 13 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 6 | 6 | 6 | 7 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | SW | SW | SSW | SSW | SW | SSW | SW | SW | SW | SW | SW | SSW | SW | SW | SW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 3 | 3 | 4 | 4 | 5 | 11 | 31 | 45 | 43 | 47 | 49 | 51 | 52 | 57 | 59 | 58 | 62 | 66 | 52 | 53 | 29 | 7 | 4 | 4 |
| Precipitation Potential (%) | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 8 | 8 | 8 | 8 | 8 | 8 | 0 | 0 | 0 |
| Relative Humidity (%) | 69 | 66 | 66 | 69 | 69 | 74 | 76 | 76 | 75 | 77 | 73 | 72 | 75 | 73 | 74 | 76 | 75 | 78 | 80 | 78 | 76 | 72 | 68 | 63 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/18 | |||||||||||||||||||||||
| Hour (PDT) | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 |
| Temperature (°C) | 21 | 22 | 21 | 21 | 19 | 18 | 16 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 17 | 18 | 19 | 21 |
| Dewpoint (°C) | 14 | 14 | 14 | 13 | 13 | 12 | 11 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 9 | 9 | 9 | 10 | 11 | 12 | 12 | 13 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Wind Dir | SW | WSW | WSW | SW | SW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 1 | 1 | 2 | 3 | 2 | 2 | 11 | 21 | 23 | 25 | 25 | 25 | 39 | 39 | 39 | 63 | 63 | 63 | 47 | 47 | 47 | 12 | 12 | 12 |
| Precipitation Potential (%) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 63 | 63 | 63 | 64 | 66 | 70 | 74 | 72 | 74 | 72 | 72 | 73 | 74 | 74 | 75 | 75 | 76 | 76 | 76 | 74 | 70 | 67 | 64 | 61 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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