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| Point Forecast: Lewistown Municipal MT 47.04N 109.45W (Elev. 4111 ft) |
Last Update: 3:49 am MST Dec 8, 2021 |
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| Date | 12/08 | 12/09 | ||||||||||||||||||||||
| Hour (MST) | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 |
| Temperature (°F) | 37 | 37 | 38 | 39 | 41 | 43 | 43 | 44 | 43 | 42 | 40 | 37 | 35 | 32 | 31 | 29 | 28 | 27 | 26 | 24 | 23 | 22 | 21 | 20 |
| Dewpoint (°F) | 24 | 24 | 25 | 25 | 27 | 25 | 23 | 25 | 24 | 25 | 25 | 24 | 22 | 19 | 19 | 17 | 16 | 15 | 14 | 12 | 12 | 11 | 10 | 10 |
| Wind Chill (°F) | 26 | 26 | 27 | 28 | 31 | 33 | 33 | 35 | 34 | 32 | 30 | 26 | 23 | 19 | 18 | 16 | 15 | 13 | 12 | 10 | 9 | 8 | 7 | 6 |
| Surface Wind (mph) | 21 | 22 | 23 | 24 | 25 | 26 | 25 | 25 | 24 | 24 | 23 | 23 | 23 | 22 | 22 | 22 | 21 | 21 | 20 | 20 | 18 | 17 | 16 | 15 |
| Wind Dir | SW | SW | SW | SW | SW | SW | WSW | WSW | WSW | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W |
| Gust | 33 | 34 | 34 | 37 | 39 | 41 | 41 | 40 | 40 | 39 | 38 | 33 | 33 | 33 | 33 | 36 | 34 | 31 | 31 | 31 | 31 | 29 | 28 | 26 |
| Sky Cover (%) | 80 | 77 | 68 | 57 | 61 | 67 | 68 | 69 | 68 | 64 | 61 | 51 | 30 | 49 | 56 | 34 | 33 | 34 | 26 | 30 | 46 | 27 | 30 | 31 |
| Precipitation Potential (%) | 1 | 0 | 0 | 0 | 1 | 2 | 4 | 2 | 6 | 7 | 6 | 5 | 4 | 4 | 6 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 0 |
| Relative Humidity (%) | 60 | 60 | 59 | 58 | 58 | 48 | 45 | 46 | 47 | 50 | 54 | 59 | 59 | 59 | 60 | 61 | 61 | 60 | 59 | 59 | 61 | 63 | 62 | 64 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Snow | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 12/10 | |||||||||||||||||||||||
| Hour (MST) | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 |
| Temperature (°F) | 20 | 19 | 21 | 23 | 26 | 28 | 30 | 30 | 30 | 29 | 27 | 24 | 22 | 21 | 20 | 19 | 19 | 19 | 18 | 18 | 17 | 17 | 17 | 17 |
| Dewpoint (°F) | 10 | 9 | 10 | 10 | 12 | 12 | 12 | 11 | 10 | 11 | 11 | 11 | 10 | 10 | 9 | 9 | 9 | 10 | 9 | 9 | 8 | 8 | 8 | 8 |
| Wind Chill (°F) | 7 | 6 | 8 | 11 | 13 | 16 | 18 | 18 | 18 | 17 | 14 | 13 | 10 | 9 | 9 | 7 | 7 | 7 | 6 | 6 | 5 | 5 | 5 | 5 |
| Surface Wind (mph) | 14 | 13 | 14 | 14 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Wind Dir | W | WSW | WSW | WSW | W | W | W | W | W | W | W | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW |
| Gust | 24 | 23 | 23 | 23 | 25 | 28 | 28 | 28 | 28 | 28 | 28 | 23 | 23 | 23 | 20 | 20 | 20 | 18 | 18 | 18 | ||||
| Sky Cover (%) | 33 | 36 | 35 | 32 | 43 | 33 | 33 | 33 | 26 | 26 | 26 | 42 | 42 | 42 | 46 | 46 | 46 | 37 | 37 | 37 | 40 | 40 | 40 | 23 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| Relative Humidity (%) | 66 | 65 | 61 | 58 | 55 | 51 | 47 | 44 | 43 | 46 | 51 | 57 | 59 | 61 | 63 | 64 | 65 | 66 | 67 | 67 | 67 | 67 | 67 | 67 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Snow | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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