| Point Forecast: Donner Summit CA 39.3N 120.4W (Elev. 7037 ft) |
Last Update: 5:21 am PDT Jul 15, 2025 |
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| Date | 07/15 | 07/16 | ||||||||||||||||||||||
| Hour (PDT) | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 |
| Temperature (°F) | 68 | 72 | 74 | 75 | 77 | 77 | 77 | 76 | 75 | 74 | 71 | 66 | 60 | 57 | 54 | 53 | 52 | 51 | 51 | 51 | 50 | 50 | 53 | 60 |
| Dewpoint (°F) | 34 | 32 | 33 | 31 | 32 | 33 | 34 | 34 | 36 | 38 | 39 | 41 | 41 | 42 | 41 | 39 | 37 | 36 | 36 | 35 | 35 | 36 | 38 | 41 |
| Heat Index (°F) | 75 | 77 | 77 | 77 | 76 | 75 | ||||||||||||||||||
| Surface Wind (mph) | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Wind Dir | SSW | SW | SW | SW | SW | SW | SW | WSW | WSW | WSW | WSW | W | WNW | NW | SW | ENE | E | SE | E | E | SE | SE | SE | S |
| Gust | 18 | 18 | 20 | 20 | 20 | 18 | ||||||||||||||||||
| Sky Cover (%) | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 2 | 2 | 2 | 3 | 4 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 1 |
| 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 (%) | 28 | 23 | 22 | 20 | 19 | 20 | 21 | 22 | 24 | 27 | 31 | 40 | 50 | 57 | 62 | 60 | 57 | 57 | 56 | 54 | 56 | 58 | 57 | 50 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/17 | |||||||||||||||||||||||
| Hour (PDT) | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 |
| Temperature (°F) | 66 | 70 | 73 | 75 | 75 | 75 | 75 | 75 | 74 | 71 | 68 | 64 | 60 | 57 | 54 | 53 | 52 | 52 | 51 | 50 | 50 | 52 | 54 | 58 |
| Dewpoint (°F) | 40 | 39 | 39 | 39 | 39 | 40 | 41 | 42 | 44 | 45 | 46 | 46 | 47 | 47 | 47 | 46 | 45 | 44 | 44 | 44 | 44 | 44 | 44 | 44 |
| Heat Index (°F) | 75 | 75 | 75 | 75 | 75 | |||||||||||||||||||
| Surface Wind (mph) | 2 | 2 | 3 | 3 | 3 | 6 | 6 | 6 | 6 | 6 | 6 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Wind Dir | S | S | SW | SW | SW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | W | W | W | SSW | SSW | SSW | SSW | SSW | SSW | SW |
| Gust | 18 | 18 | 18 | |||||||||||||||||||||
| Sky Cover (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 5 | 5 | 5 | 8 | 8 | 8 | 9 | 9 | 9 | 14 | 14 | 14 | 15 |
| Precipitation Potential (%) | 0 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 5 | 5 | 5 | 5 | 5 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 38 | 31 | 29 | 27 | 27 | 28 | 29 | 31 | 34 | 39 | 45 | 52 | 61 | 70 | 76 | 77 | 76 | 74 | 76 | 79 | 79 | 75 | 67 | 59 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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