| Point Forecast: Napa CA 38.29N 122.29W (Elev. 6 m) |
Last Update: 11:48 am PDT Sep 10, 2026 |
 |
|
[show menu] |
| Date | 09/10 | 09/11 | ||||||||||||||||||||||
| Hour (PDT) | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 |
| Temperature (°C) | 29 | 31 | 31 | 31 | 31 | 31 | 29 | 27 | 23 | 22 | 20 | 19 | 18 | 17 | 16 | 16 | 14 | 14 | 14 | 14 | 14 | 16 | 18 | 21 |
| Dewpoint (°C) | 15 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 |
| Heat Index (°C) | 29 | 31 | 30 | 30 | 30 | 30 | 28 | 27 | ||||||||||||||||
| Surface Wind (mph) | 7 | 9 | 9 | 10 | 10 | 9 | 8 | 7 | 6 | 6 | 5 | 6 | 5 | 5 | 5 | 3 | 2 | 2 | 2 | 2 | 3 | 3 | 5 | 7 |
| Wind Dir | SSW | SW | SW | SW | SW | SW | SW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 10 | 13 | 26 | 28 | 28 | 14 | 18 | 10 | 8 | 8 | 1 | 2 | 3 | 5 | 11 | 33 | 41 | 42 | 49 | 59 | 47 | 46 | 28 | 16 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 40 | 37 | 35 | 33 | 33 | 35 | 37 | 43 | 52 | 59 | 66 | 70 | 73 | 78 | 82 | 84 | 87 | 91 | 93 | 97 | 95 | 86 | 76 | 67 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 09/12 | |||||||||||||||||||||||
| Hour (PDT) | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 |
| Temperature (°C) | 24 | 26 | 27 | 28 | 27 | 27 | 26 | 23 | 21 | 19 | 18 | 17 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 13 | 13 | 15 | 17 | 19 |
| Dewpoint (°C) | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 13 | 13 |
| Heat Index (°C) | 24 | 26 | 27 | 28 | 28 | 27 | 26 | |||||||||||||||||
| Surface Wind (mph) | 8 | 9 | 9 | 9 | 9 | 9 | 8 | 6 | 5 | 5 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 5 | 5 | 10 |
| Wind Dir | SSW | SSW | SSW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | WSW | WSW | WSW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 10 | 0 | 1 | 1 | 0 | 1 | 3 | 1 | 1 | 7 | 5 | 29 | 29 | 29 | 44 | 44 | 44 | 59 | 59 | 59 | 50 | 50 | 50 | 34 |
| 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 (%) | 59 | 54 | 50 | 48 | 49 | 51 | 53 | 59 | 67 | 71 | 74 | 76 | 77 | 79 | 81 | 82 | 84 | 85 | 86 | 89 | 89 | 83 | 74 | 65 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| ||||||||||