| Point Forecast: Mount St Helens WA 46.18N 122.18W (Elev. 6204 ft) |
Last Update: 6:56 pm PDT Jul 13, 2025 |
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| Date | 07/13 | 07/14 | ||||||||||||||||||||||
| Hour (PDT) | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| Temperature (°F) | 66 | 65 | 61 | 61 | 61 | 60 | 59 | 58 | 57 | 57 | 56 | 55 | 57 | 57 | 58 | 59 | 60 | 59 | 59 | 60 | 60 | 61 | 59 | 58 |
| Dewpoint (°F) | 48 | 45 | 43 | 42 | 42 | 40 | 40 | 40 | 39 | 41 | 41 | 40 | 41 | 41 | 42 | 43 | 45 | 45 | 44 | 44 | 44 | 45 | 43 | 42 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 18 | 20 | 18 | 18 | 14 | 13 | 11 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 13 | 14 | 14 | 14 | 14 | 14 | 15 | 16 | 16 | 16 |
| Wind Dir | NNW | NNW | NNW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW |
| Gust | 29 | 28 | 28 | 28 | 18 | 18 | 20 | 20 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | |||||||||
| Sky Cover (%) | 5 | 5 | 5 | 6 | 8 | 9 | 9 | 5 | 5 | 10 | 16 | 23 | 21 | 13 | 17 | 15 | 15 | 19 | 17 | 13 | 8 | 3 | 4 | 4 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 52 | 48 | 51 | 50 | 49 | 48 | 50 | 52 | 51 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 57 | 60 | 58 | 56 | 56 | 56 | 56 | 56 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/15 | |||||||||||||||||||||||
| Hour (PDT) | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| Temperature (°F) | 57 | 54 | 51 | 51 | 50 | 50 | 49 | 49 | 49 | 48 | 48 | 50 | 52 | 54 | 56 | 57 | 59 | 61 | 62 | 64 | 65 | 65 | 66 | 65 |
| Dewpoint (°F) | 42 | 39 | 36 | 36 | 35 | 35 | 34 | 34 | 33 | 32 | 31 | 33 | 34 | 36 | 38 | 39 | 40 | 42 | 43 | 44 | 44 | 43 | 42 | 41 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 16 | 15 | 15 | 15 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 |
| Wind Dir | NW | NW | NW | NW | NNW | NNW | NNW | N | N | N | N | N | N | NNE | NNE | NNE | NE | NE | NE | NW | NW | NW | NNW | NNW |
| Gust | 22 | 21 | 21 | 21 | ||||||||||||||||||||
| Sky Cover (%) | 4 | 16 | 16 | 16 | 16 | 16 | 16 | 5 | 5 | 5 | 5 | 5 | 5 | 2 | 2 | 2 | 4 | 4 | 4 | 10 | 10 | 10 | 6 | 6 |
| 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 (%) | 57 | 56 | 57 | 57 | 56 | 56 | 55 | 55 | 54 | 53 | 52 | 52 | 51 | 51 | 51 | 50 | 50 | 50 | 49 | 49 | 46 | 44 | 41 | 41 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
