| Point Forecast: Napa CA 38.29N 122.29W (Elev. 20 ft) |
Last Update: 1:26 am PDT Aug 16, 2026 |
 |
|
[show menu] |
| Date | 08/16 | 08/17 | ||||||||||||||||||||||
| Hour (PDT) | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 |
| Temperature (°F) | 54 | 56 | 58 | 63 | 67 | 71 | 76 | 78 | 79 | 80 | 78 | 76 | 74 | 68 | 65 | 62 | 61 | 60 | 59 | 58 | 57 | 57 | 56 | 55 |
| Dewpoint (°F) | 54 | 55 | 56 | 58 | 58 | 59 | 61 | 61 | 61 | 62 | 61 | 61 | 61 | 58 | 58 | 57 | 57 | 56 | 56 | 55 | 54 | 54 | 54 | 53 |
| Heat Index (°F) | 76 | 78 | 79 | 81 | 79 | 77 | ||||||||||||||||||
| Surface Wind (mph) | 1 | 1 | 1 | 2 | 3 | 5 | 6 | 7 | 7 | 8 | 8 | 7 | 6 | 5 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Wind Dir | WSW | WSW | SW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SW | SW | SSW | S | S | SSW | S | S | SSW | S | S | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 81 | 76 | 67 | 43 | 18 | 14 | 11 | 8 | 10 | 22 | 22 | 25 | 10 | 4 | 16 | 28 | 35 | 35 | 45 | 56 | 79 | 76 | 82 | 82 |
| 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 (%) | 97 | 97 | 91 | 82 | 73 | 65 | 60 | 56 | 54 | 54 | 55 | 59 | 64 | 71 | 78 | 84 | 87 | 88 | 90 | 90 | 91 | 91 | 91 | 93 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 08/18 | |||||||||||||||||||||||
| Hour (PDT) | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 |
| Temperature (°F) | 56 | 56 | 58 | 62 | 66 | 71 | 74 | 75 | 77 | 76 | 75 | 73 | 69 | 65 | 62 | 60 | 59 | 58 | 57 | 56 | 56 | 55 | 55 | 55 |
| Dewpoint (°F) | 54 | 55 | 56 | 57 | 58 | 60 | 60 | 60 | 62 | 61 | 60 | 60 | 59 | 58 | 57 | 57 | 57 | 56 | 55 | 55 | 54 | 53 | 53 | 53 |
| Heat Index (°F) | 75 | 77 | 76 | 75 | ||||||||||||||||||||
| Surface Wind (mph) | 2 | 3 | 3 | 3 | 7 | 7 | 7 | 9 | 9 | 9 | 8 | 8 | 8 | 6 | 6 | 6 | 5 | 5 | 5 | 2 | 2 | 2 | 2 | 2 |
| Wind Dir | SW | WSW | WSW | WSW | SW | SW | SW | SW | SW | SW | SW | SW | SW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 82 | 93 | 93 | 93 | 44 | 44 | 44 | 48 | 48 | 48 | 52 | 52 | 52 | 49 | 49 | 49 | 47 | 47 | 47 | 78 | 78 | 78 | 86 | 86 |
| 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 (%) | 96 | 96 | 91 | 84 | 75 | 68 | 63 | 60 | 59 | 59 | 60 | 64 | 71 | 78 | 84 | 89 | 92 | 94 | 94 | 94 | 93 | 93 | 93 | 95 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| ||||||||||