Minnesota WeatherTalk

Preliminary Climate Summary for September 2025: Despite a cooler than normal start to the month, this September will end up warmer than normal across virtually all of Minnesota. Average monthly temperatures will range from 2°F to 5°F above normal, with dozens of locations reporting at least one 90°F daily maximum temperature. Extremes for the state ranged from 94°F at Worthington (Nobles County), Fairmont (Martin County), and Sherburn (Martin County) on the 13th to just 29°F at Brimson (St Louis County), Hibbing (St Louis County) and International Falls (Koochiching County), all during the first 10 days of the month. Rainfall was mixed during September, with parts of northeastern and southeastern Minnesota receiving the most rainfall. With the forecast calling for dry weather through the end of the month next Tuesday, the current rainfall totals from around the state will remain the same. About a quarter of the climate observers report over 3 inches of rain for the month (above nor...

Abrupt reversal in temperatures, but still high humidity: After an exceptionally cool start to the month of September when temperatures were averaging 7°F to 9°F below normal with many overnight lows in the 30s F up north, the temperature trend has abruptly reversed itself since last Friday (September 12). Many days have brought afternoon high temperatures in the 80s and even 90s F (55 reports of daily highs in the 90s F since last Friday). And some very warm nights as well, with lows in the upper 60s to low 70s F. MSP tied a record warm minimum temperature for September 15th with a reading of 72°F and at least 7 other climate stations reported record warm minimum temperatures as well. With the forecast calling for above normal temperatures for the balance of the month, it is safe to say that this will be a warmer than normal month of September, despite the cold start to the month. BTW, the current MN-DNR Fall Color update shows that across portions of central and northern Minneso...

September Weather Update: Since last week, a number of Minnesota climate stations have reported overnight low temperatures in the 30s F. At least 20 climate stations have reported a frost, and a few others have seen overnight temperatures drop into the upper 20s F. It was just 26°F last Sunday morning (September 7) at Brownton (McLeod County). Average temperatures this month are ranging from 4°F to 8°F below normal so far, but that is about to change with a long run of above normal temperatures coming up and several days expected to bring high temperatures in the 80s F, may a few 90s F, and overnight lows in the 60s F. A few southern Minnesota communities saw 80°F or higher on Thursday of this week. Dew points will also creep upward into the 60s F and low 70s F. Outlook models continue to favor above normal temperatures for most of the balance of September. Rainfall this month has been above normal to near normal in most places around Minnesota. The range across the state has been...

September starts cool and wet up north: Over the first 4 days of September average temperatures are running from 4°F to 7°F below normal. More than 30 climate stations in northern Minnesota have already reported morning low temperatures in the 30s F. The observer at Indus (Koochiching County), along Highway 11 west of International Falls along the border with Canada reported just 33°F on Thursday morning this week. These morning low temperatures in the 30s F may help promote some early fall color change in some areas of northern Minnesota. Fall color seekers may want to monitor the Minnesota DNR Fall Color maps on their web site staring next week to more closely follow progress of the autumn color change. Temperatures are expected to rebound to above normal daily values starting Monday and Tuesday of next week and continuing for most of the remainder of the month. So, the current cool spell will be relatively short-lived. Rainfall has been highly variable around Minnesota mostly ...