Montana State Weather. The numbers are for the total amount of new snow and how many days it snows at least 0.1 inches (0.25 centimetres) this month. Generally, from July through September (summer in Montana), it tends to be generally dry throughout Montana, with sunshine the norm, with only a few days of clouds and light rain. Updated Montana State weather maps. Historic Perspective: The snowstorm that affected north central Montana on September 28-30, 2019 was notable in many aspects.It produced a total of 52 inches at Babb and 48 inches at Browning. Montly weather forecast in Montana on Yandex.Weather. Weather forecasts for all towns and cities in Montana State If you are local to the area in which you need weather information, we encourage you to leave your own Montana weather report or traffic update to help other visitors. The climate in Montana during September can be summarized as mild and reasonably dry. Weather forecast in mobile app. Great Falls, Montana, got 9.7 inches of snow Saturday, the highest one-day September snow amount for that city, followed by 9.6 inches Sunday, the second highest, the National Weather … Missoula, Montana, also shattered its snowiest September record, picking up 1.7 inches on Sept. 29, topping the previous September record of 1.5 inches from 1934 in this western Montana city. September is in the fall / autumn in Montana and is typically the 4th warmest month of the year. Year * Month * Day * Data is available up to November 22, 2020. Weather in Montana in September: air temperature, number of sunny days, precipitation, air pressure and humidity. Montana has, by and large, beautiful summer weather. Information about regional climates. ☂ Online precipitation map and other weather maps. At Great Falls, where 19.3 inches fell, 17.7-inches fell within a 24-hour period on the 28 th and 29 th.This set an all-time record for the most snow in a 24-hour period at Great Falls. Average Snowfall for Montana in September The tables below give monthly averages for snowfall during September at cities, towns and parks in Montana. Montana weather reports with current conditions in each city also include a 5-day weather forecast, any local weather alerts, and road conditions with live traffic updates. Daytime maximum temperatures average around 24°C (75°F), whilst at night 12°C (53°F) is normal. See Historical Weather Data for a Location and Date. September, the first month of the autumn, in Red Lodge, is still a pleasant month, with average temperature fluctuating between 68.5°F (20.3°C) and 39.9°F (4.4°C). The September weather guide for Missoula, Montana shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & … This is generally standard throughout the entire state, too. Weather History for Places in Montana .