| Point Forecast: Mount St Helens WA 46.18N 122.18W (Elev. 6204 ft) |
Last Update: 9:41 pm PST Dec 16, 2025 |
 |
|
[show menu] |
| Date | 12/16 | 12/17 | ||||||||||||||||||||||
| Hour (PST) | 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) | 38 | 38 | 36 | 31 | 26 | 25 | 25 | 24 | 24 | 23 | 23 | 24 | 24 | 24 | 23 | 24 | 24 | 25 | 24 | 25 | 25 | 26 | 25 | 25 |
| Dewpoint (°F) | 36 | 35 | 33 | 28 | 23 | 22 | 22 | 20 | 21 | 19 | 20 | 21 | 22 | 23 | 22 | 23 | 23 | 24 | 23 | 25 | 25 | 25 | 23 | 22 |
| Wind Chill (°F) | 24 | 24 | 21 | 14 | 7 | 6 | 6 | 5 | 5 | 5 | 5 | 6 | 7 | 7 | 7 | 9 | 9 | 11 | 12 | 13 | 13 | 14 | 13 | 13 |
| Surface Wind (mph) | 40 | 41 | 41 | 41 | 41 | 40 | 38 | 38 | 37 | 32 | 32 | 31 | 28 | 28 | 24 | 22 | 21 | 18 | 14 | 14 | 14 | 14 | 14 | 14 |
| Wind Dir | SW | SW | SW | W | W | W | W | W | W | W | W | W | W | W | W | W | WSW | WSW | WSW | WSW | WSW | SW | SW | SW |
| Gust | 61 | 62 | 63 | 62 | 59 | 56 | 55 | 53 | 51 | 45 | 44 | 41 | 40 | 38 | 36 | 32 | 30 | 29 | 23 | 23 | 23 | 21 | 21 | 21 |
| Sky Cover (%) | 100 | 100 | 100 | 95 | 89 | 83 | 92 | 97 | 85 | 84 | 87 | 96 | 94 | 87 | 93 | 94 | 88 | 90 | 96 | 96 | 96 | 96 | 96 | 96 |
| Precipitation Potential (%) | 100 | 100 | 100 | 92 | 83 | 73 | 87 | 95 | 62 | 67 | 80 | 93 | 91 | 80 | 89 | 90 | 82 | 84 | 94 | 94 | 94 | 94 | 94 | 94 |
| Relative Humidity (%) | 93 | 88 | 88 | 88 | 87 | 88 | 87 | 85 | 88 | 86 | 89 | 90 | 92 | 95 | 95 | 97 | 97 | 97 | 97 | 100 | 98 | 94 | 91 | 88 |
| Rain | Ocnl | Ocnl | Ocnl | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Snow | -- | SChc | Ocnl | Ocnl | Ocnl | Lkly | Ocnl | Ocnl | Lkly | Lkly | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 12/18 | |||||||||||||||||||||||
| Hour (PST) | 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) | 25 | 25 | 26 | 26 | 26 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 27 | 29 | 30 | 30 | 31 | 31 | 31 | 32 | 32 | 32 | 31 |
| Dewpoint (°F) | 21 | 21 | 22 | 22 | 22 | 20 | 20 | 20 | 21 | 21 | 22 | 23 | 25 | 26 | 29 | 30 | 30 | 31 | 31 | 31 | 31 | 30 | 29 | 28 |
| Wind Chill (°F) | 14 | 14 | 15 | 14 | 14 | 13 | 11 | 11 | 13 | 12 | 12 | 12 | 12 | 13 | 16 | 17 | 17 | 18 | 18 | 18 | 20 | 19 | 19 | 18 |
| Surface Wind (mph) | 13 | 13 | 13 | 15 | 15 | 15 | 18 | 18 | 18 | 21 | 21 | 21 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 24 | 24 | 24 |
| Wind Dir | SSW | SSW | SSW | S | S | S | S | S | S | S | S | S | S | S | S | SSW | SSW | SSW | SW | SW | SW | SW | SW | SW |
| Gust | 18 | 18 | 18 | 21 | 21 | 21 | 25 | 25 | 25 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 34 | 34 | 34 |
| Sky Cover (%) | 98 | 98 | 98 | 98 | 98 | 98 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Precipitation Potential (%) | 97 | 97 | 97 | 97 | 97 | 97 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 99 | 99 | 99 | 99 | 99 | 99 |
| Relative Humidity (%) | 86 | 84 | 84 | 83 | 83 | 82 | 82 | 81 | 80 | 81 | 85 | 89 | 94 | 97 | 99 | 100 | 100 | 100 | 100 | 98 | 96 | 93 | 90 | 87 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Snow | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
