| Point Forecast: Mount St Helens WA 46.18N 122.18W (Elev. 1891 m) |
Last Update: 11:46 pm PDT Jul 13, 2025 |
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| Date | 07/13 | 07/14 | ||||||||||||||||||||||
| Hour (PDT) | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Temperature (°C) | 16 | 16 | 15 | 14 | 14 | 14 | 13 | 13 | 14 | 14 | 14 | 15 | 16 | 15 | 15 | 16 | 16 | 16 | 15 | 14 | 14 | 12 | 11 | 11 |
| Dewpoint (°C) | 6 | 4 | 4 | 4 | 4 | 5 | 5 | 4 | 5 | 5 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 4 | 2 | 2 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 14 | 13 | 11 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 13 | 14 | 14 | 14 | 14 | 14 | 15 | 16 | 16 | 16 | 16 | 15 | 15 | 15 |
| Wind Dir | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 8 | 9 | 9 | 5 | 5 | 10 | 16 | 23 | 21 | 13 | 17 | 15 | 15 | 19 | 17 | 13 | 8 | 3 | 4 | 4 | 4 | 16 | 16 | 16 |
| Precipitation Potential (%) | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 49 | 48 | 50 | 52 | 51 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 57 | 60 | 58 | 56 | 56 | 56 | 56 | 56 | 57 | 56 | 57 | 57 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/15 | |||||||||||||||||||||||
| Hour (PDT) | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Temperature (°C) | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 18 | 18 | 19 | 18 | 18 | 18 | 17 | 16 |
| Dewpoint (°C) | 2 | 2 | 1 | 1 | 1 | 0 | -1 | 1 | 1 | 2 | 3 | 4 | 4 | 6 | 6 | 7 | 7 | 6 | 6 | 5 | 5 | 4 | 3 | 2 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 |
| Wind Dir | NNW | NNW | NNW | N | N | N | N | N | N | NNE | NNE | NNE | NE | NE | NE | NW | NW | NW | NNW | NNW | NNW | NNW | NNW | NNW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 16 | 16 | 16 | 5 | 5 | 5 | 5 | 5 | 5 | 2 | 2 | 2 | 4 | 4 | 4 | 10 | 10 | 10 | 6 | 6 | 6 | 10 | 10 | 10 |
| 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 (%) | 56 | 56 | 55 | 55 | 54 | 53 | 52 | 52 | 51 | 51 | 51 | 50 | 50 | 50 | 49 | 49 | 46 | 44 | 41 | 41 | 41 | 41 | 41 | 41 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
