| Point Forecast: Napa CA 38.29N 122.29W (Elev. 20 ft) |
Last Update: 1:26 am PDT Oct 5, 2026 |
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| Date | 10/05 | 10/06 | ||||||||||||||||||||||
| Hour (PDT) | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 |
| Temperature (°F) | 65 | 64 | 64 | 64 | 64 | 68 | 74 | 78 | 86 | 90 | 93 | 96 | 96 | 95 | 92 | 84 | 78 | 75 | 73 | 71 | 70 | 69 | 67 | 66 |
| Dewpoint (°F) | 54 | 54 | 53 | 53 | 54 | 54 | 56 | 57 | 59 | 59 | 59 | 59 | 58 | 58 | 58 | 56 | 56 | 55 | 54 | 54 | 54 | 53 | 52 | 52 |
| Heat Index (°F) | 79 | 85 | 90 | 92 | 95 | 95 | 94 | 90 | 83 | 78 | 75 | |||||||||||||
| Surface Wind (mph) | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 5 | 5 | 6 | 6 | 6 | 3 | 2 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
| Wind Dir | N | N | N | N | S | SSW | SW | SSW | S | SSW | SSW | SSW | SSW | SSW | SSW | S | S | N | SW | SSW | N | N | N | N |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 7 | 6 | 7 | 10 | 8 | 7 | 6 | 3 | 1 | 0 | 1 | 0 | 1 | 1 | 2 | 1 | 3 | 3 | 2 | 1 | 4 | 5 | 7 | 10 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 |
| Relative Humidity (%) | 67 | 68 | 68 | 69 | 69 | 63 | 55 | 48 | 41 | 35 | 32 | 30 | 29 | 29 | 32 | 38 | 45 | 50 | 52 | 54 | 56 | 58 | 60 | 62 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 10/07 | |||||||||||||||||||||||
| Hour (PDT) | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 |
| Temperature (°F) | 65 | 64 | 64 | 63 | 64 | 68 | 73 | 79 | 86 | 90 | 93 | 95 | 96 | 94 | 91 | 85 | 78 | 74 | 72 | 71 | 69 | 67 | 66 | 64 |
| Dewpoint (°F) | 52 | 52 | 52 | 52 | 53 | 55 | 56 | 57 | 59 | 59 | 58 | 58 | 58 | 56 | 56 | 56 | 54 | 54 | 53 | 53 | 52 | 51 | 50 | 49 |
| Heat Index (°F) | 79 | 85 | 89 | 92 | 95 | 95 | 93 | 90 | 84 | 78 | ||||||||||||||
| Surface Wind (mph) | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 3 | 3 | 3 | 6 | 6 | 6 | 7 | 7 | 7 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 |
| Wind Dir | N | N | N | N | WNW | WNW | WNW | SW | SW | SW | WSW | WSW | WSW | WSW | WSW | WSW | W | W | W | W | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 11 | 32 | 32 | 32 | 26 | 26 | 26 | 5 | 5 | 5 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 3 | 3 | 3 | 8 | 8 |
| 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 (%) | 64 | 65 | 66 | 67 | 68 | 63 | 56 | 47 | 41 | 35 | 32 | 29 | 28 | 28 | 31 | 37 | 44 | 48 | 51 | 53 | 54 | 56 | 57 | 58 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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