| Point Forecast: Grass Valley CA 39.23N 121.08W (Elev. 2598 ft) |
Last Update: 2:00 am PDT May 12, 2026 |
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| Date | 05/12 | 05/13 | ||||||||||||||||||||||
| Hour (PDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°F) | 62 | 60 | 60 | 59 | 59 | 62 | 67 | 70 | 77 | 79 | 81 | 82 | 82 | 82 | 82 | 81 | 80 | 77 | 70 | 66 | 64 | 62 | 60 | 59 |
| Dewpoint (°F) | 51 | 49 | 49 | 47 | 48 | 50 | 53 | 51 | 55 | 54 | 52 | 52 | 52 | 52 | 51 | 50 | 49 | 50 | 49 | 49 | 48 | 48 | 48 | 48 |
| Heat Index (°F) | 77 | 79 | 80 | 81 | 81 | 81 | 81 | 80 | 79 | 77 | ||||||||||||||
| Surface Wind (mph) | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 5 | 3 | 3 | 3 | 2 | 2 | 2 | 2 |
| Wind Dir | E | E | E | E | E | ESE | ESE | SSE | S | SSW | SSW | SSW | SSW | SSW | S | S | S | S | SSE | SSE | SE | SSE | SSE | SSE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 16 | 6 | 1 | 1 | 1 | 6 | 5 | 4 | 3 | 6 | 10 | 5 | 4 | 6 | 5 | 5 | 7 | 9 | 17 | 30 | 36 | 45 | 35 | 37 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 |
| Relative Humidity (%) | 67 | 68 | 66 | 64 | 66 | 65 | 60 | 50 | 46 | 42 | 37 | 35 | 35 | 36 | 34 | 34 | 34 | 39 | 47 | 54 | 57 | 60 | 64 | 66 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 05/14 | |||||||||||||||||||||||
| Hour (PDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°F) | 58 | 56 | 55 | 54 | 54 | 55 | 57 | 60 | 64 | 66 | 68 | 70 | 70 | 71 | 72 | 71 | 70 | 67 | 63 | 60 | 58 | 56 | 55 | 54 |
| Dewpoint (°F) | 48 | 46 | 46 | 46 | 46 | 46 | 45 | 46 | 48 | 47 | 47 | 47 | 45 | 45 | 43 | 40 | 39 | 41 | 43 | 43 | 42 | 41 | 41 | 40 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 2 | 2 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 5 | 5 | 5 | 5 | 5 | 5 | 3 | 3 | 3 | 0 | 0 | 0 | 2 | 2 | 2 |
| Wind Dir | SSE | SE | SE | SSE | SSE | SSE | S | S | S | SW | SW | SW | WSW | WSW | WSW | W | W | W | N | N | N | ENE | ENE | ENE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 39 | 21 | 26 | 22 | 22 | 22 | 9 | 9 | 9 | 27 | 27 | 27 | 22 | 22 | 22 | 15 | 15 | 15 | 1 | 1 | 1 | 2 | 2 | 2 |
| 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 (%) | 69 | 70 | 72 | 73 | 73 | 72 | 65 | 59 | 56 | 51 | 47 | 44 | 41 | 39 | 35 | 32 | 32 | 39 | 48 | 53 | 56 | 58 | 60 | 60 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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