| Point Forecast: Mount St Helens WA 46.2N 122.21W (Elev. 6598 ft) |
Last Update: 9:41 pm PDT May 23, 2024 |
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| Date | 05/23 | 05/24 | ||||||||||||||||||||||
| Hour (PDT) | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| Temperature (°F) | 33 | 32 | 33 | 32 | 33 | 33 | 32 | 31 | 33 | 33 | 33 | 33 | 33 | 32 | 33 | 32 | 31 | 33 | 31 | 31 | 32 | 32 | 32 | 30 |
| Dewpoint (°F) | 28 | 27 | 28 | 26 | 26 | 26 | 25 | 24 | 26 | 26 | 25 | 27 | 27 | 27 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 29 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 9 | 13 | 13 | 13 | 14 | 14 |
| Wind Dir | W | WSW | WSW | WSW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SSW | SW | SW | SW | SW | WSW | W | W | W | WSW | WSW |
| Gust | 18 | 18 | ||||||||||||||||||||||
| Sky Cover (%) | 51 | 50 | 61 | 63 | 66 | 65 | 68 | 66 | 74 | 73 | 71 | 82 | 90 | 89 | 90 | 90 | 87 | 82 | 87 | 93 | 93 | 93 | 93 | 93 |
| Precipitation Potential (%) | 0 | 0 | 2 | 3 | 6 | 9 | 15 | 12 | 14 | 23 | 23 | 26 | 35 | 53 | 61 | 60 | 67 | 64 | 56 | 89 | 89 | 89 | 89 | 89 |
| Relative Humidity (%) | 82 | 81 | 81 | 77 | 77 | 76 | 76 | 73 | 78 | 73 | 72 | 79 | 78 | 81 | 88 | 92 | 95 | 94 | 98 | 100 | 96 | 96 | 96 | 95 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 05/25 | |||||||||||||||||||||||
| Hour (PDT) | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| Temperature (°F) | 30 | 29 | 29 | 28 | 28 | 27 | 27 | 26 | 27 | 27 | 28 | 27 | 27 | 26 | 27 | 28 | 28 | 29 | 29 | 30 | 30 | 30 | 30 | 30 |
| Dewpoint (°F) | 28 | 27 | 26 | 25 | 25 | 24 | 23 | 23 | 23 | 23 | 23 | 24 | 25 | 26 | 26 | 27 | 28 | 28 | 29 | 29 | 28 | 27 | 27 | 26 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 14 | 15 | 15 | 15 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 |
| Wind Dir | WSW | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W |
| Gust | 18 | 20 | 20 | 20 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 22 | 22 | 22 | 24 | 24 | 24 | 24 | 24 | 24 | 21 | 21 |
| Sky Cover (%) | 93 | 89 | 89 | 89 | 89 | 89 | 89 | 85 | 85 | 85 | 84 | 84 | 84 | 78 | 78 | 78 | 82 | 82 | 82 | 79 | 79 | 79 | 80 | 80 |
| Precipitation Potential (%) | 89 | 83 | 83 | 83 | 83 | 83 | 83 | 75 | 75 | 75 | 75 | 75 | 75 | 61 | 61 | 61 | 61 | 61 | 61 | 31 | 31 | 31 | 31 | 31 |
| Relative Humidity (%) | 93 | 91 | 90 | 89 | 88 | 87 | 87 | 86 | 84 | 83 | 81 | 87 | 92 | 98 | 98 | 98 | 98 | 98 | 97 | 97 | 94 | 90 | 87 | 85 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
