| Point Forecast: 6 Miles N Mount St Helens WA 46.27N 122.17W (Elev. 4491 ft) |
Last Update: 1:41 pm PDT Sep 4, 2026 |
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| Date | 09/04 | 09/05 | ||||||||||||||||||||||
| Hour (PDT) | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 |
| Temperature (°F) | 50 | 50 | 51 | 52 | 53 | 51 | 49 | 49 | 46 | 46 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 43 | 45 | 46 | 47 | 49 | 52 | 52 |
| Dewpoint (°F) | 43 | 44 | 46 | 47 | 48 | 47 | 46 | 46 | 43 | 43 | 42 | 41 | 41 | 40 | 40 | 40 | 40 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 2 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 2 | 1 | 2 | 1 |
| Wind Dir | S | S | S | SE | E | NNE | ENE | E | ENE | NE | ESE | NNE | ENE | E | NNE | NE | ENE | NE | ENE | E | E | ESE | ESE | WNW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 72 | 75 | 69 | 69 | 59 | 53 | 49 | 37 | 44 | 36 | 39 | 38 | 34 | 42 | 49 | 42 | 56 | 45 | 66 | 55 | 51 | 76 | 70 | 62 |
| Precipitation Potential (%) | 42 | 44 | 53 | 54 | 21 | 17 | 16 | 4 | 4 | 6 | 5 | 7 | 10 | 7 | 9 | 12 | 26 | 23 | 17 | 20 | 27 | 30 | 33 | 43 |
| Relative Humidity (%) | 76 | 81 | 82 | 83 | 83 | 87 | 90 | 90 | 90 | 90 | 90 | 87 | 85 | 83 | 82 | 82 | 81 | 84 | 82 | 81 | 82 | 79 | 73 | 78 |
| Rain | Chc | Chc | Chc | Chc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | SChc | SChc | SChc | Chc | Chc | Chc | Chc |
| Thunder | SChc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc |
| Date | 09/06 | |||||||||||||||||||||||
| Hour (PDT) | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 |
| Temperature (°F) | 52 | 53 | 53 | 53 | 53 | 52 | 51 | 49 | 48 | 47 | 46 | 45 | 46 | 46 | 46 | 46 | 46 | 44 | 46 | 47 | 49 | 52 | 54 | 54 |
| Dewpoint (°F) | 46 | 49 | 50 | 50 | 50 | 49 | 48 | 46 | 45 | 44 | 43 | 42 | 42 | 41 | 41 | 40 | 40 | 38 | 40 | 40 | 41 | 43 | 44 | 44 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 2 | 2 |
| Wind Dir | W | W | WSW | NW | NNE | NNE | NNE | NE | NE | NE | ENE | ENE | ENE | E | E | E | E | E | E | ENE | ENE | ENE | N | N |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 69 | 78 | 77 | 72 | 74 | 74 | 74 | 52 | 52 | 52 | 80 | 80 | 80 | 80 | 80 | 80 | 92 | 92 | 92 | 69 | 69 | 69 | 65 | 65 |
| Precipitation Potential (%) | 54 | 63 | 65 | 58 | 33 | 29 | 11 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 5 | 9 | 13 | 13 | 13 | 13 | 13 | 13 | 40 | 40 |
| Relative Humidity (%) | 80 | 85 | 88 | 89 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 88 | 85 | 83 | 81 | 80 | 78 | 80 | 79 | 77 | 74 | 71 | 68 | 69 |
| Rain | Chc | Lkly | Lkly | Lkly | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc |
| Thunder | SChc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
