Severe thunderstorms will race along a cold front from the Upper Mississippi Valley into the Great Lakes and Ohio Valley with the main threat being damaging winds. The tail end of this front will possibly produce heavy to excessive rainfall across the southern Plains into the Lower Mississippi Valley through Saturday. Finally, Major-to-record river flooding continues across the Carolinas. Read More >
August Climate Summary
and September Climate Outlook
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For the full details check out: Click Here For a larger view of the Duluth, Minnesota temperature graph provided by the Midwestern Regional Climate Center: Click Here |
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For the full details check out: Click Here For a larger view of the International Falls, Minnesota temperature graph provided by the Midwestern Regional Climate Center: Click Here |
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For the full details check out: Click Here For a larger view of the Brainerd, Minnesota temperature graph provided by the Midwestern Regional Climate Center: Click Here |
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For the full details check out: Click Here For a larger view of the Hibbing, Minnesota temperature graph provided by the Midwestern Regional Climate Center: Click Here |
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For the full details check out: Click Here For a larger view of the Ashland, Wisconsin temperature graph provided by the Midwestern Regional Climate Center: Click Here |
September Climate Outlook
| Temperature Outlook | Precipitation Outlook |
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For Duluth, normal highs are in the low 70s at the beginning of the the month and cool to the upper 50s by the end of the month. Normal lows are in the low 50s at the beginning of the month and cool to the low 40s by the end of the month. Normal precipitation for September is 4.11 inches. Normal snowfall for September is 0.1 inches. For International Falls, normal highs begin the month in the low 70s and cool to the upper 50s by the end of the month. Normal lows begin the month in the upper 40s and cool to the mid 30s by the end of the month. Normal precipitation for September is 2.99 inches. Normal snowfall for September is 0.1 inches. For Brainerd, normal highs begin the month in the mid 70s and cool to the mid 60s by the end of the month. Normal lows begin the month in the low 50s and cool to the low 40s by the end of the month. Normal precipitation for September is 3.18 inches. For Hibbing, normal highs begin the month in the low 70s and cool to the upper 50s by the end of the month. Normal lows begin the month in the mid 40s and cool to the mid 30s by the end of the month. Normal precipitation for September is 3.07 inches. For Ashland, normal highs begin the month in the mid 70s and cool to the low 60s by the end of the month. Normal lows begin the month in the upper 40s and cool to the low 40s by the end of the month. Normal precipitation for September is 3.85 inches. For all locations the latest Climate Prediction Center Outlook indicates that odds are slightly tilted toward above normal temperatures and above normal precipitation for September. |
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Duluth, MN
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Normals for the Month of September |
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The Normal, Monthly Average Temperature (degrees F) |
55.6 |
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The Normal, Monthly High Temperature (degrees F) |
65.0 |
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The Normal, Monthly Low Temperature (degrees F) |
46.1 |
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Normal Monthly Precipitation (inches) |
4.11 |
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Normal Monthly Snowfall (inches) |
0.1 |
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Normal number of days with Measurable Precipitation |
12.3 |
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Normal number of days with snow depth of 1 inch or greater |
0.0 |
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Normal Heating Degree Days |
298 |
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Normal Cooling Degree Days |
14 |
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Records for the Month of September |
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Warmest Month (Monthly Average Temperature) |
62.6 in 1897 |
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Coldest Month (Monthly Average Temperature) |
47.8 in 1974 |
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Highest Observed Temperature (degrees F) |
95 on the 7th in 1976 |
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Lowest Observed High Temperature (degrees F) |
38 on the 30th in 1985 |
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Lowest Observed Temperature (degrees F) |
23 on the 20th in 1962, on the 26th 1965 & on the 22nd 1974 |
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Highest Observed Low Temperature (degrees F) |
72 on the 11th in 1931 |
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Greatest Monthly Precipitation (inches) |
11.52 in 1881 |
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Least Monthly Precipitation (inches) |
0.19 in 1952 |
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Greatest Daily Precipitation (inches) |
3.97 on the 6th in 1876 |
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Greatest Monthly Snowfall (inches) |
2.4 in 1991 |
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Least Monthly Snowfall (inches) |
0.0 |
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Greatest Daily Snowfall (inches) |
2.4 on the 18th 1991 |
International Falls, MN
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Normals for the Month of September |
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The Normal, Monthly Average Temperature (degrees F) |
53.6 |
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The Normal, Monthly High Temperature (degrees F) |
65.4 |
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The Normal, Monthly Low Temperature (degrees F) |
41.8 |
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Normal Monthly Precipitation (inches) |
2.99 |
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Normal Monthly Snowfall (inches) |
0.10 |
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Normal number of days with Measurable Precipitation |
11.9 |
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Normal number of days with snow depth of 1 inch or greater |
0.0 |
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Normal Heating Degree Days |
353 |
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Normal Cooling Degree Days |
11 |
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Records for the Month of September |
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Warmest Month (Monthly Average Temperature) |
62.7 in 1920 |
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Coldest Month (Monthly Average Temperature) |
46.4 in 1965 |
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Highest Observed Temperature (degrees F) |
96 on the 7th in 1906 |
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Lowest Observed High Temperature (degrees F) |
35 on the 25th & 26th in 1926 |
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Lowest Observed Temperature (degrees F) |
19 on the 15th in 2011 |
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Highest Observed Low Temperature (degrees F) |
73 on the 8th in 2002 |
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Greatest Monthly Precipitation (inches) |
7.36 in 1961 |
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Least Monthly Precipitation (inches) |
0.20 in 1897 |
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Greatest Daily Precipitation (inches) |
3.34 on the 1st in 1973 |
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Greatest Monthly Snowfall (inches) |
2.0 in 1912 |
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Least Monthly Snowfall (inches) |
0 in Multiple Years |
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Greatest Daily Snowfall (inches) |
2.0 on the 26th in 1912 |
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Greatest Measured Snow Depth (inches) |
0.0 |
Brainerd, MN
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Normals for the Month of September |
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The Normal, Monthly Average Temperature (degrees F) |
58.1 |
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The Normal, Monthly High Temperature (degrees F) |
69.1 |
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The Normal, Monthly Low Temperature (degrees F) |
47.2 |
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Normal Monthly Precipitation (inches) |
3.18 |
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Normal Heating Degree Days |
235 |
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Normal Cooling Degree Days |
30 |
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Records for the Month of September |
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Warmest Month (Monthly Average Temperature) |
63.6 in 1931 and 2009 |
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Coldest Month (Monthly Average Temperature) |
49.2 in 1918 |
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Highest Observed Temperature (degrees F) |
103 on the 10th in 1931 |
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Lowest Observed High Temperature (degrees F) |
36 on the 29th in 1899 |
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Lowest Observed Temperature (degrees F) |
18 on the 22nd in 1974 |
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Highest Observed Low Temperature (degrees F) |
71 in multiple years |
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Greatest Monthly Precipitation (inches) |
8.04 in 1986 |
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Least Monthly Precipitation (inches) |
0.26 in 1952 |
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Greatest Daily Precipitation (inches) |
3.62 on the 5th in 2004 |
Hibbing, MN
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Normals for the Month of September |
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The Normal, Monthly Average Temperature (degrees F) |
53.1 |
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The Normal, Monthly High Temperature (degrees F) |
65.9 |
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The Normal, Monthly Low Temperature (degrees F) |
40.2 |
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Normal Monthly Precipitation (inches) |
3.07 |
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Normal Heating Degree Days |
367 |
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Normal Cooling Degree Days |
9 |
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Records for the Month of September |
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Warmest Month (Monthly Average Temperature) |
60.6 in 1948 |
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Coldest Month (Monthly Average Temperature) |
46.1 in 1965 |
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Highest Observed Temperature (degrees F) |
94 on the 7th in 1976 |
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Lowest Observed High Temperature (degrees F) |
34 on the 24th in 1942 |
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Lowest Observed Temperature (degrees F) |
20 in multiple years |
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Highest Observed Low Temperature (degrees F) |
68 in multiple years |
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Greatest Monthly Precipitation (inches) |
8.67 in 1947 |
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Least Monthly Precipitation (inches) |
0.50 in 1952 |
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Greatest Daily Precipitation (inches) |
5.51 on the 10th in 1947 |
Ashland, WI
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Normals for the Month of September |
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The Normal, Monthly Average Temperature (degrees F) |
56.7 |
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The Normal, Monthly High Temperature (degrees F) |
68.4 |
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The Normal, Monthly Low Temperature (degrees F) |
45.0 |
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Normal Monthly Precipitation (inches) |
3.85 |
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Normal Heating Degree Days |
270 |
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Normal Cooling Degree Days |
21 |
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Records for the Month of September |
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Warmest Month (Monthly Average Temperature) |
61.8 in 2015 |
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Coldest Month (Monthly Average Temperature) |
50.0 in 1918 |
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Highest Observed Temperature (degrees F) |
100 on the 7th in 1976 |
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Lowest Observed High Temperature (degrees F) |
43 on the 23rd in 1913 and on the 19th in 1918 |
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Lowest Observed Temperature (degrees F) |
12 on the 28th in 1893 |
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Highest Observed Low Temperature (degrees F) |
75 on the 8th in 1906 |
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Greatest Monthly Precipitation (inches) |
10.00 in 1985 |
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Least Monthly Precipitation (inches) |
0.09 in 1952 |
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Greatest Daily Precipitation (inches) |
4.70 on the 3rd in 1985 |
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