| Point Forecast: 17 Miles ENE Mount St Helens WA 46.27N 121.86W (Elev. 4833 ft) |
Last Update: 3:41 pm PDT Jul 13, 2025 |
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| Date | 07/13 | 07/14 | ||||||||||||||||||||||
| 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) | 75 | 75 | 75 | 73 | 70 | 69 | 64 | 61 | 61 | 59 | 58 | 58 | 56 | 56 | 55 | 54 | 55 | 57 | 58 | 61 | 63 | 65 | 65 | 66 |
| Dewpoint (°F) | 51 | 52 | 51 | 50 | 50 | 52 | 51 | 50 | 51 | 50 | 50 | 51 | 50 | 50 | 50 | 49 | 49 | 50 | 49 | 50 | 50 | 52 | 50 | 50 |
| Heat Index (°F) | 75 | 75 | 75 | |||||||||||||||||||||
| Surface Wind (mph) | 11 | 11 | 11 | 11 | 13 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 7 | 8 | 9 | 10 | 10 | 11 | 11 | 13 | 13 | 13 |
| Wind Dir | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NW | NW | NW | NW | NW | NW |
| Gust | 18 | 18 | 20 | 20 | 18 | 18 | 18 | 20 | 20 | 20 | 20 | 20 | ||||||||||||
| Sky Cover (%) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 3 | 6 | 6 | 8 | 11 | 17 | 29 | 27 | 21 | 18 | 15 | 14 | 19 | 18 | 14 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 43 | 44 | 43 | 45 | 49 | 55 | 62 | 67 | 70 | 72 | 75 | 78 | 79 | 80 | 82 | 82 | 79 | 76 | 73 | 68 | 62 | 62 | 59 | 57 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/15 | |||||||||||||||||||||||
| 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) | 65 | 66 | 64 | 62 | 60 | 55 | 53 | 52 | 50 | 50 | 50 | 50 | 50 | 49 | 49 | 51 | 52 | 54 | 57 | 61 | 64 | 66 | 68 | 70 |
| Dewpoint (°F) | 49 | 50 | 48 | 47 | 47 | 45 | 47 | 46 | 45 | 45 | 45 | 45 | 44 | 42 | 41 | 42 | 43 | 43 | 44 | 45 | 44 | 45 | 45 | 45 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 13 | 11 | 13 | 13 | 13 | 13 | 13 | 13 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 6 | 6 | 6 | 6 |
| Wind Dir | NNW | NNW | NNW | NNW | NNW | NW | NW | NW | N | N | N | N | N | N | NNE | NNE | NNE | NE | NE | NE | ENE | ENE | ENE | NNE |
| Gust | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | ||||||||||||||||
| Sky Cover (%) | 13 | 5 | 5 | 5 | 5 | 33 | 33 | 33 | 28 | 28 | 28 | 10 | 10 | 10 | 6 | 6 | 6 | 5 | 5 | 5 | 9 | 9 | 9 | 9 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 57 | 57 | 57 | 57 | 61 | 68 | 79 | 81 | 83 | 83 | 82 | 82 | 80 | 77 | 75 | 72 | 70 | 67 | 61 | 55 | 49 | 46 | 44 | 41 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
