| Point Forecast: Mount St Helens WA 46.2N 122.18W (Elev. 5997 ft) |
Last Update: 3:41 pm PDT Jul 16, 2025 |
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| Date | 07/16 | 07/17 | ||||||||||||||||||||||
| Hour (PDT) | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 |
| Temperature (°F) | 66 | 67 | 65 | 66 | 65 | 62 | 60 | 58 | 57 | 56 | 55 | 53 | 53 | 53 | 51 | 52 | 54 | 56 | 58 | 59 | 60 | 62 | 62 | 62 |
| Dewpoint (°F) | 44 | 46 | 44 | 46 | 46 | 43 | 43 | 41 | 38 | 36 | 34 | 31 | 31 | 31 | 28 | 28 | 28 | 29 | 31 | 34 | 35 | 40 | 40 | 40 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 6 | 7 | 8 | 8 | 8 | 9 | 7 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 9 |
| Wind Dir | NW | NW | NW | NW | NW | WNW | WNW | W | W | W | W | W | W | W | W | W | W | W | W | WNW | WNW | WNW | WNW | WNW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 9 | 5 | 5 | 5 | 5 | 8 | 8 | 6 | 5 | 5 | 5 | 4 | 3 | 2 | 6 | 11 | 12 | 4 | 1 | 1 | 1 | 3 | 5 | 5 |
| 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 (%) | 45 | 47 | 47 | 48 | 50 | 50 | 54 | 53 | 49 | 47 | 45 | 43 | 42 | 42 | 40 | 39 | 36 | 36 | 36 | 39 | 39 | 44 | 45 | 45 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/18 | |||||||||||||||||||||||
| Hour (PDT) | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 |
| Temperature (°F) | 63 | 62 | 62 | 62 | 61 | 61 | 58 | 57 | 55 | 54 | 54 | 53 | 52 | 52 | 51 | 53 | 54 | 56 | 57 | 58 | 59 | 60 | 60 | 61 |
| Dewpoint (°F) | 44 | 44 | 44 | 44 | 44 | 44 | 41 | 41 | 40 | 38 | 37 | 35 | 34 | 35 | 34 | 35 | 36 | 38 | 39 | 40 | 42 | 43 | 43 | 44 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 6 | 6 | 6 | 10 | 10 | 10 | 14 |
| Wind Dir | WNW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | W | W | W | W | W | W | W |
| Gust | 21 | |||||||||||||||||||||||
| Sky Cover (%) | 5 | 5 | 4 | 5 | 7 | 16 | 16 | 11 | 6 | 6 | 6 | 3 | 3 | 3 | 5 | 5 | 5 | 4 | 4 | 4 | 2 | 2 | 2 | 28 |
| 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 (%) | 49 | 52 | 51 | 51 | 54 | 53 | 54 | 55 | 56 | 54 | 53 | 51 | 51 | 52 | 52 | 51 | 51 | 50 | 51 | 52 | 53 | 53 | 54 | 54 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
