| Point Forecast: Mount St Helens WA 46.18N 122.18W (Elev. 6204 ft) |
Last Update: 11:42 am PDT Jul 15, 2025 |
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| Date | 07/15 | 07/16 | ||||||||||||||||||||||
| Hour (PDT) | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 |
| Temperature (°F) | 62 | 63 | 64 | 65 | 65 | 66 | 66 | 64 | 63 | 60 | 59 | 57 | 56 | 56 | 55 | 54 | 54 | 53 | 55 | 57 | 59 | 62 | 62 | 63 |
| Dewpoint (°F) | 43 | 44 | 43 | 43 | 43 | 42 | 43 | 42 | 41 | 39 | 37 | 34 | 31 | 31 | 31 | 29 | 29 | 28 | 28 | 29 | 31 | 33 | 33 | 36 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 3 | 3 | 3 | 5 | 6 | 6 | 6 | 6 | 7 | 8 | 9 | 10 | 11 | 14 | 14 | 15 | 15 | 15 | 14 | 11 | 10 | 8 | 7 | 5 |
| Wind Dir | E | E | E | ENE | ENE | ENE | ENE | NE | ENE | NNE | NE | ENE | NE | ENE | E | NNE | NNE | NNE | N | ENE | E | ESE | SSE | S |
| Gust | 18 | 18 | 18 | 18 | 18 | |||||||||||||||||||
| Sky Cover (%) | 3 | 8 | 7 | 11 | 4 | 5 | 6 | 7 | 10 | 6 | 5 | 6 | 7 | 7 | 4 | 3 | 4 | 5 | 10 | 7 | 1 | 2 | 3 | 3 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 50 | 49 | 47 | 45 | 45 | 42 | 44 | 45 | 44 | 46 | 43 | 41 | 39 | 39 | 39 | 38 | 38 | 38 | 35 | 34 | 34 | 33 | 34 | 37 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/17 | |||||||||||||||||||||||
| Hour (PDT) | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 |
| Temperature (°F) | 64 | 66 | 67 | 67 | 67 | 67 | 66 | 65 | 64 | 62 | 60 | 58 | 57 | 55 | 54 | 53 | 51 | 50 | 52 | 53 | 55 | 57 | 58 | 60 |
| Dewpoint (°F) | 38 | 40 | 42 | 43 | 44 | 44 | 43 | 41 | 40 | 39 | 37 | 36 | 35 | 33 | 33 | 32 | 31 | 30 | 32 | 33 | 35 | 36 | 37 | 39 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 5 | 5 | 5 | 5 | 5 | 8 | 8 | 8 | 8 | 8 | 8 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 8 |
| Wind Dir | S | S | WSW | WSW | WSW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | WNW | W | W | W | W | W | W | WSW | WSW | WSW | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 3 | 3 | 5 | 5 | 5 | 4 | 4 | 4 | 9 | 9 | 9 | 8 | 8 | 8 | 3 | 3 | 3 | 4 | 4 | 4 | 3 | 3 | 3 | 2 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 38 | 39 | 40 | 41 | 43 | 44 | 43 | 42 | 41 | 42 | 42 | 43 | 44 | 44 | 45 | 45 | 46 | 46 | 46 | 46 | 46 | 46 | 45 | 45 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
