| Point Forecast: Mount St Helens WA 46.18N 122.18W (Elev. 6204 ft) |
Last Update: 1:41 am PDT May 22, 2024 |
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| Date | 05/22 | 05/23 | ||||||||||||||||||||||
| Hour (PDT) | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 |
| Temperature (°F) | 32 | 31 | 28 | 27 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 29 | 29 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 |
| Dewpoint (°F) | 29 | 28 | 25 | 23 | 22 | 22 | 23 | 22 | 23 | 25 | 26 | 28 | 28 | 29 | 29 | 29 | 29 | 31 | 30 | 29 | 28 | 26 | 27 | 27 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 23 | 25 | 26 | 26 | 26 | 26 | 25 | 24 | 22 | 20 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 18 | 16 | 14 | 13 | 11 | 10 | 10 |
| Wind Dir | WNW | WNW | WNW | W | WNW | W | W | W | W | W | W | W | WNW | WNW | WNW | WNW | WNW | WNW | W | WNW | W | WNW | WNW | WNW |
| Gust | 33 | 36 | 38 | 38 | 38 | 38 | 37 | 36 | 33 | 30 | 29 | 30 | 30 | 28 | 28 | 28 | 28 | 26 | 24 | 21 | 20 | |||
| Sky Cover (%) | 80 | 78 | 76 | 78 | 79 | 83 | 79 | 87 | 94 | 96 | 95 | 85 | 81 | 77 | 75 | 71 | 77 | 79 | 79 | 80 | 80 | 67 | 64 | 67 |
| Precipitation Potential (%) | 45 | 31 | 17 | 17 | 25 | 45 | 63 | 75 | 91 | 94 | 92 | 77 | 60 | 45 | 39 | 41 | 36 | 37 | 35 | 28 | 21 | 12 | 6 | 5 |
| Relative Humidity (%) | 87 | 87 | 87 | 85 | 84 | 86 | 83 | 82 | 84 | 91 | 96 | 97 | 96 | 96 | 94 | 92 | 92 | 99 | 95 | 93 | 87 | 83 | 84 | 85 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | -- | -- | -- | SChc | SChc | SChc | -- | -- | -- | -- | -- |
| Date | 05/24 | |||||||||||||||||||||||
| Hour (PDT) | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 |
| Temperature (°F) | 32 | 32 | 32 | 32 | 30 | 32 | 32 | 32 | 34 | 34 | 34 | 35 | 36 | 37 | 37 | 38 | 38 | 37 | 37 | 36 | 35 | 35 | 34 | 34 |
| Dewpoint (°F) | 27 | 27 | 26 | 27 | 24 | 27 | 26 | 26 | 28 | 28 | 30 | 31 | 32 | 33 | 33 | 33 | 33 | 32 | 32 | 31 | 30 | 29 | 28 | 28 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 9 | 9 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 10 | 10 | 10 | 8 | 8 | 8 | 6 | 6 |
| Wind Dir | WNW | NW | W | W | NW | NW | NW | W | W | W | W | W | W | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 65 | 69 | 69 | 74 | 72 | 69 | 60 | 71 | 68 | 68 | 67 | 67 | 67 | 67 | 67 | 67 | 56 | 56 | 56 | 52 | 52 | 52 | 49 | 49 |
| Precipitation Potential (%) | 4 | 4 | 3 | 3 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Relative Humidity (%) | 82 | 80 | 79 | 80 | 79 | 80 | 77 | 77 | 77 | 80 | 85 | 86 | 86 | 87 | 85 | 83 | 81 | 81 | 82 | 82 | 80 | 79 | 77 | 77 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
