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| Point Forecast: Mount St Helens WA 46.18N 122.18W (Elev. 6204 ft) |
Last Update: 3:41 am PDT Apr 25, 2024 |
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| Date | 04/25 | 04/26 | ||||||||||||||||||||||
| Hour (PDT) | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 |
| Temperature (°F) | 33 | 33 | 32 | 33 | 32 | 33 | 32 | 31 | 31 | 31 | 31 | 31 | 32 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 31 | 31 |
| Dewpoint (°F) | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 31 | 31 | 31 | 31 | 31 | 30 | 31 | 31 | 31 | 28 | 28 | 28 | 29 | 28 | 27 | 26 |
| Wind Chill (°F) | 21 | 21 | 19 | 20 | 19 | 20 | 18 | 17 | 17 | 17 | 18 | 18 | 18 | 17 | 17 | 18 | 17 | 17 | 17 | 17 | 20 | 20 | 19 | 19 |
| Surface Wind (mph) | 13 | 13 | 16 | 16 | 16 | 17 | 17 | 22 | 22 | 25 | 22 | 23 | 23 | 25 | 25 | 22 | 21 | 20 | 17 | 17 | 16 | 16 | 16 | 16 |
| Wind Dir | SSW | SW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | S | SSW | SSW | SSW | SSW | SSW | SSW | SW | SSW | SW | SW | SW | SW | SW | SW |
| Gust | 18 | 20 | 24 | 26 | 26 | 29 | 30 | 36 | 36 | 38 | 36 | 37 | 37 | 38 | 38 | 36 | 32 | 31 | 30 | 30 | 26 | 26 | 26 | 26 |
| Sky Cover (%) | 87 | 99 | 100 | 97 | 98 | 100 | 100 | 100 | 100 | 100 | 100 | 99 | 99 | 98 | 98 | 98 | 97 | 95 | 92 | 91 | 88 | 87 | 87 | 85 |
| Precipitation Potential (%) | 80 | 98 | 100 | 95 | 97 | 100 | 100 | 100 | 100 | 100 | 99 | 98 | 98 | 97 | 97 | 97 | 95 | 92 | 88 | 86 | 82 | 78 | 71 | 66 |
| Relative Humidity (%) | 84 | 84 | 85 | 83 | 86 | 85 | 88 | 91 | 99 | 99 | 100 | 98 | 97 | 99 | 100 | 99 | 98 | 90 | 88 | 89 | 87 | 86 | 86 | 83 |
| Rain | Ocnl | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Ocnl | Ocnl | Ocnl | Ocnl | -- | Ocnl | -- | Ocnl | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Snow | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Lkly | Lkly |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 04/27 | |||||||||||||||||||||||
| Hour (PDT) | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 |
| Temperature (°F) | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 32 |
| Dewpoint (°F) | 27 | 26 | 28 | 27 | 26 | 26 | 27 | 28 | 29 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 27 | 27 | 27 | 27 |
| Wind Chill (°F) | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 24 | 24 | 24 | 24 | 25 | 25 | 24 | 24 |
| Surface Wind (mph) | 15 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 18 | 18 | 18 | 17 | 17 | 17 | 7 | 7 | 7 | 7 | 7 | 7 | 9 | 9 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | SSW | SSW | SSW | SW | SW | SW | WSW | WSW | WSW | SW | SW | SW | SW | SW | SW | WSW | WSW |
| Gust | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | ||||||||||||||
| Sky Cover (%) | 88 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 96 | 96 | 96 | 96 | 96 | 96 | 78 | 78 | 78 | 82 | 82 |
| Precipitation Potential (%) | 63 | 100 | 100 | 100 | 100 | 100 | 100 | 99 | 99 | 99 | 99 | 99 | 99 | 93 | 93 | 93 | 93 | 93 | 93 | 60 | 60 | 60 | 60 | 60 |
| Relative Humidity (%) | 85 | 83 | 88 | 86 | 84 | 84 | 87 | 91 | 94 | 96 | 97 | 97 | 96 | 95 | 95 | 95 | 94 | 92 | 89 | 87 | 85 | 84 | 83 | 82 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Lkly | Lkly |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Snow | Lkly | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Lkly | Lkly | Lkly | Lkly | Lkly |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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