Montana August 2023 Weather Summary
The state’s lowest temperature of 29°F was the warmest extreme minimum in August since 30°F in 1923.
Helena’s average temperature in August (72.3°F) was their 5th warmest of record. This has been the coolest water-year to date since 2019.
There have been 19 days with temperatures over 100°F in Montana this year. The average through August is 20 days. This is the lowest number of days in a season since 2019 and the 40th highest of record (records began in 1892).
Baker received 4.15-in of rain in August. This was their 2nd highest August amount of record. In 2014, 4.78-in of rain fell at Baker. This was Baker’s 5th wettest summer period (Jun-Aug) with 9.77-in, and wettest since 2005. Kalispell had 2.95” of rain in August, their 7th highest of record and wettest August since 1989. Miles City got 3.06” in August, their 5th highest of record and highest in August since 1968. Billings received 8.2” during the summer period, their 4th wettest of record and wettest since 2010. Bozeman had their 7th wettest summer (7.00”) and wettest since 2014. Butte had their 8th wettest summer season (7.77”) and wettest since 1997.
West Yellowstone, with 30.48”, has their 3rd wettest water-year of record. This is their wettest since 1997.
For a Montana state average, this was the wettest August since 2014, likewise for the summer season (Jun-Aug).
The tornado on August 6 near Boulder was the first recorded tornado in Jefferson County since these records began in 1950.
Kalispell had their second highest August gust of record on the 22nd, with a gust of 67-mph. Their highest August gust is 74-mph in 1990.
Tunnel Ridge (Flathead) recorded the state’s highest daily wind gust on four days during August.
Lighter wind averages throughout the summer produced a summer average with the 2nd lightest average of record. The lightest average for this period was 7.2-mph in 2013.
Smoke from wildfires in Canada continued to plague Montana in August. There were also some fires in northwestern Montana.
Locations with most days of warmest or coldest daily extreme temperature in Montana during the month (3 days or more)
Trout Creek has recorded the state’s highest temperature on 34 days so far in 2023, the greatest at any one location, and Libby second with 28 days. Georgetown Lake has had the state’s lowest temperature on 37 days so far this year, second place goes to West Yellowstone with 33 days.
Deep Creek RAWS (Glacier) has recorded the highest daily gust on 52 days.
This data is from several sources, including Alberta Environment, BNSF, Bureau of Indian Affairs, Bureau of Land Management, Bureau of Reclamation, CoCoRaHS, FAA, Forest Service, Montana DEQ, Montana Department of Transportation, Montana Mesonet, National Park Service, National Resources Conservation Service, NDAWN, NOAA/NWS, University of Utah Mesowest, Weather Underground and Ambient Weather, in addition to weather spotters and private weather stations. The National Centers for Environmental Information is the repository for US weather data.