| Point Forecast: Donner Summit CA 39.3N 120.4W (Elev. 7037 ft) |
Last Update: 12:21 am PDT Jul 14, 2025 |
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| Date | 07/14 | 07/15 | ||||||||||||||||||||||
| Hour (PDT) | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 |
| Temperature (°F) | 58 | 58 | 58 | 57 | 57 | 57 | 59 | 66 | 74 | 78 | 81 | 82 | 82 | 83 | 83 | 82 | 80 | 79 | 75 | 70 | 64 | 60 | 58 | 57 |
| Dewpoint (°F) | 45 | 43 | 44 | 42 | 43 | 42 | 45 | 46 | 44 | 42 | 42 | 42 | 42 | 43 | 43 | 45 | 42 | 42 | 41 | 43 | 43 | 43 | 42 | 41 |
| Heat Index (°F) | 78 | 79 | 80 | 80 | 81 | 81 | 80 | 79 | 79 | 75 | ||||||||||||||
| Surface Wind (mph) | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 5 | 3 | 2 | 2 | 2 | 2 |
| Wind Dir | NE | NE | NE | NE | ENE | ENE | ENE | E | SE | SSW | SW | SW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | W | NW | W | N |
| Gust | 18 | 18 | ||||||||||||||||||||||
| Sky Cover (%) | 6 | 4 | 2 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 5 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 62 | 57 | 59 | 58 | 60 | 58 | 59 | 49 | 34 | 28 | 25 | 24 | 24 | 24 | 24 | 27 | 26 | 27 | 30 | 37 | 46 | 53 | 56 | 55 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/16 | |||||||||||||||||||||||
| Hour (PDT) | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 |
| Temperature (°F) | 56 | 55 | 53 | 53 | 52 | 53 | 54 | 62 | 68 | 72 | 74 | 76 | 77 | 77 | 77 | 76 | 75 | 73 | 70 | 66 | 61 | 57 | 53 | 51 |
| Dewpoint (°F) | 41 | 40 | 39 | 39 | 39 | 39 | 40 | 41 | 38 | 36 | 36 | 35 | 35 | 35 | 36 | 37 | 38 | 39 | 40 | 40 | 41 | 41 | 40 | 40 |
| Heat Index (°F) | 76 | 77 | 77 | 77 | 76 | 75 | ||||||||||||||||||
| Surface Wind (mph) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 2 | 2 |
| Wind Dir | N | S | E | E | S | S | S | SSW | SSW | SSW | SW | SW | SW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | SSW | SSW |
| Gust | 21 | 21 | 21 | 20 | 20 | 20 | ||||||||||||||||||
| Sky Cover (%) | 3 | 4 | 4 | 3 | 3 | 3 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 56 | 56 | 58 | 58 | 60 | 58 | 58 | 46 | 33 | 27 | 25 | 23 | 22 | 22 | 22 | 24 | 26 | 29 | 33 | 39 | 47 | 56 | 62 | 64 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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