Weather history and climate summary information is available for the following locations:
- Billings
- Glasgow
- Great Falls
- Helena
- Lewistown
- Miles City
- Missoula
Warmest August Days
The warmest August days in Montana are:
| Glasgow, Montana | 1983 | 108°F |
| Miles City, Montana | 1995 | 108°F |
| Miles City, Montana | 2003 | 107.1°F |
| Billings, Montana | 2001 | 106°F |
| Miles City, Montana | 2001 | 105.1°F |
Coldest August Days
The coldest August days in Montana were:
| Helena, Montana | 1992 | 28°F |
| Lewistown, Montana | 1992 | 28.9°F |
| Lewistown, Montana | 1987 | 30.9°F |
| Great Falls, Montana | 1992 | 30.9°F |
| Missoula, Montana | 1982 | 32°F |
Wettest August Days
The wettest single days in August occurred:
| Great Falls, Montana | 1984 | 10.9 inches |
| Great Falls, Montana | 1983 | 10.9 inches |
| Lewistown, Montana | 1985 | 3.2 inches |
| Lewistown, Montana | 2002 | 3.1 inches |
| Great Falls, Montana | 1989 | 2.6 inches |