High pressure will continue to dominate western Montana's weather through Thursday. This means colder air will remain trapped in many valley locations, areas of freezing fog and limited amounts of sunshine are expected through the end of the week. Valley locations that find themselves stuck under the inversions will see highs in the teens and 20s. Sunny and milder than normal in the mountains. East of the divide, including Bozeman, more nice late autumn weather is expected with clear, cold nights and sunny, nice days. Daytime highs will be in the 30s, and possibly a few lower 40s.
A storm system will move into the region Friday and this weekend, scouring the inversions out of the valleys. There may be a period of snow and freezing rain before this happen.
Most areas will have a chance of light rain or snow Friday into the weekend, but at this point it does not look to be a major storm. Daytime highs will be in the 30s and low 40s this weekend.