| Point Forecast: Donner Summit CA 39.3N 120.4W (Elev. 2145 m) |
Last Update: 12:31 pm PDT Jul 13, 2025 |
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| Date | 07/13 | 07/14 | ||||||||||||||||||||||
| Hour (PDT) | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 |
| Temperature (°C) | 29 | 29 | 29 | 28 | 27 | 27 | 24 | 22 | 19 | 17 | 16 | 16 | 14 | 14 | 14 | 14 | 13 | 14 | 14 | 18 | 23 | 25 | 27 | 27 |
| Dewpoint (°C) | 6 | 6 | 8 | 9 | 9 | 9 | 8 | 9 | 9 | 9 | 8 | 7 | 7 | 6 | 6 | 6 | 5 | 6 | 6 | 7 | 6 | 5 | 6 | 5 |
| Heat Index (°C) | 27 | 27 | 28 | 27 | 27 | 26 | 24 | 25 | 26 | 27 | ||||||||||||||
| Surface Wind (mph) | 3 | 5 | 5 | 6 | 6 | 5 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 5 |
| Wind Dir | SSW | SW | WSW | WSW | WSW | WSW | W | W | NW | N | NE | NNE | NE | NE | NE | NE | ENE | ENE | ENE | E | S | SSW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 2 | 2 | 2 | 0 | 2 | 1 | 3 | 5 | 6 | 6 | 6 | 7 | 6 | 3 | 3 | 3 | 3 | 1 | 1 | 1 | 0 | 0 | 1 | 1 |
| Precipitation Potential (%) | 1 | 2 | 2 | 2 | 4 | 3 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 24 | 24 | 26 | 30 | 32 | 32 | 36 | 43 | 53 | 59 | 59 | 58 | 59 | 59 | 59 | 59 | 59 | 58 | 59 | 48 | 34 | 28 | 26 | 24 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/15 | |||||||||||||||||||||||
| Hour (PDT) | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 |
| Temperature (°C) | 28 | 28 | 28 | 28 | 27 | 26 | 24 | 21 | 18 | 16 | 14 | 13 | 12 | 12 | 11 | 11 | 11 | 12 | 13 | 16 | 18 | 21 | 23 | 24 |
| Dewpoint (°C) | 5 | 5 | 5 | 6 | 5 | 5 | 5 | 6 | 6 | 6 | 5 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 3 | 3 | 2 |
| Heat Index (°C) | 27 | 27 | 27 | 27 | 26 | 26 | 24 | 24 | ||||||||||||||||
| Surface Wind (mph) | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 6 | 6 |
| Wind Dir | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | W | W | W | S | S | S | SSE | SSE | SSE | SSW | SSW | SSW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 4 | 4 | 4 | 1 | 1 | 1 | 1 | 1 |
| Precipitation Potential (%) | 2 | 2 | 0 | 0 | 4 | 4 | 4 | 4 | 4 | 4 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| Relative Humidity (%) | 23 | 23 | 23 | 24 | 24 | 26 | 29 | 37 | 47 | 53 | 56 | 57 | 57 | 56 | 57 | 57 | 56 | 54 | 50 | 45 | 38 | 32 | 26 | 23 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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