| Point Forecast: Mount St Helens WA 46.18N 122.18W (Elev. 1891 m) |
Last Update: 3:21 am PDT Jul 14, 2025 |
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| Date | 07/14 | 07/15 | ||||||||||||||||||||||
| Hour (PDT) | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 |
| Temperature (°C) | 14 | 14 | 14 | 13 | 14 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 14 | 14 | 12 | 11 | 11 | 10 | 10 | 10 | 10 |
| Dewpoint (°C) | 4 | 4 | 4 | 3 | 4 | 5 | 5 | 6 | 6 | 7 | 7 | 6 | 6 | 6 | 5 | 4 | 4 | 2 | 1 | 1 | 1 | 1 | 1 | 1 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 10 | 10 | 10 | 10 | 11 | 11 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 16 | 16 | 17 | 16 | 15 | 14 | 13 | 10 | 10 | 10 | 10 |
| Wind Dir | NW | NW | NW | NW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | NW | NW | NNW | NNW | N | N | N | NNE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 5 | 10 | 16 | 23 | 21 | 13 | 17 | 15 | 13 | 16 | 13 | 8 | 5 | 3 | 3 | 4 | 6 | 15 | 19 | 15 | 19 | 22 | 22 | 13 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 51 | 51 | 52 | 51 | 51 | 51 | 51 | 51 | 53 | 57 | 56 | 53 | 51 | 51 | 51 | 52 | 51 | 51 | 53 | 52 | 52 | 52 | 53 | 54 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/16 | |||||||||||||||||||||||
| Hour (PDT) | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 |
| Temperature (°C) | 10 | 9 | 9 | 9 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 17 | 18 | 18 | 19 | 18 | 18 | 17 | 16 | 16 | 14 | 14 | 14 | 13 |
| Dewpoint (°C) | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 4 | 4 | 6 | 7 | 8 | 7 | 7 | 6 | 6 | 6 | 5 | 4 | 3 | 2 | 2 | 2 | 1 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 10 | 10 | 10 | 10 | 9 | 8 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 10 | 10 | 10 | 14 |
| Wind Dir | N | N | N | N | N | NNE | NE | ENE | E | E | E | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | ENE | ENE | ENE | E |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 10 | 10 | 11 | 11 | 11 | 2 | 2 | 2 | 3 | 3 | 3 | 13 | 13 | 13 | 8 | 8 | 8 | 16 | 16 | 16 | 8 | 8 | 8 | 2 |
| 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 (%) | 54 | 54 | 56 | 53 | 49 | 50 | 49 | 49 | 50 | 51 | 52 | 53 | 50 | 47 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 43 | 43 | 42 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
