/Issued 5:15 PM CDT, Wednesday, August 31, 2016/
Source, TropicalTidbits.com; CFS model
Orange colors=Warmer than normal temperatures
Blue colors=Cooler than normal temperatures
White=Near average temperatures
Green=Above average precipitation
Yellow=Below average precipitation
White=Near average precipitation
Note: I don't think will have a top 5 warmest September like last year in Duluth but overall expect slightly warmer than normal temperatures in September. Yes will have some shots of cooler temperatures as well, especially toward the middle and the end of the month but nothing unusual about that as we are now making that transition out of summer and into fall. I'm pretty sure will have a few more thunderstorms as well during the month of September.
Tonight's low temperature forecast.
Thursday's high temperature forecast.
September climate averages for Duluth, Minnesota (Airport location)
Temperature: 55.6 degrees
Warmest September on record: 62.6 degrees in 1897
Coldest September on record: 47.8 degrees in 1974
Wettest September on record: 11.52" in 1881
Driest September on record: 0.19" in 1952
Snowiest September on record: 2.4" in 1991
Normal high temperature on the 1st: 71 degrees
Normal high temperature on the 30th: 59 degrees
Normal low temperature on the 1st: 52 degrees
Normal low temperature on the 30th: 40 degrees
Astronomical data for September:
Sunrise on the 1st: 6:29 AM CDT
Sunrise on the 30th: 7:06 AM CDT
Sunset on the 1st: 7:47 PM CDT
Sunset on the 30th: 6:51 PM CDT
September 2015 climate stats:
Average temperature: 61.5 degrees (Tied for 4th warmest September on record)
Departure: +5.9 degrees above normal
Total precipitation: 6.81"
Departure: +2.70" above normal
18 days with a high temperature of at least 70 F (Average is 10 days)
3 days with a high temperature of at least 80 F (Average is 2 days)
5 thunderstorm days
Note: Most of the Northland typically sees their first freeze of the season during the month of September. In northern Minnesota, this usually happens between September 11-20 while in Duluth, all of northwest Wisconsin and for areas closer to Lake Superior the first freeze of the season is a little later in September, typically between the 21st and 30th.
Source, Midwest Regional Climate Center.
Weather Summary for northeast Minnesota and northwest Wisconsin
Date: August 31, 2016
The final day of August and meteorological Summer 2016 was a nice one with highs ranging from the upper 60s in northern Minnesota to the 70s elsewhere. Mostly cloudy skies were common in northern Minnesota today with more sunshine farther south. Winds today were out of the north at around 5 to 15 mph.
Forecast Discussion for northeast Minnesota and northwest Wisconsin
...Short Term Forecast...
Tonight through Thursday night (August 31-September 1)
Quiet weather will continue. Patchy fog possible late tonight and again late Thursday night. Expect partly to mostly cloudy skies with lows tonight and Thursday night in the 40s and 50s with highs on Thursday in the 70s with 60s closer to Lake Superior. North or east winds at 5 to 15 mph.
Friday (September 2)
Southerly winds increase on Friday with highs in the 70s. Lows Friday night will be in the 50s. Dry weather will continue on Friday.
Saturday (September 3)
Not much change in the weather -- Mainly dry with highs topping out in the 70s once again. Could be a few showers or thunderstorms mainly over western portions of the Northland by Saturday night as a low pressure system and cold front move slowly east toward the Upper Midwest -- A better chance for occasional showers and thunderstorms from Sunday through Tuesday the way it looks now.
Forecast for Duluth and Superior
.Tonight... Partly cloudy. Low 49 to 54. Wind north around 10 mph.
.Thursday... Cooler. Partly cloudy. High 65 to 70. Wind east at 10 to 15 mph.
Forecast for the Silver 1000 at Proctor Speedway on Thursday - Gates open at 4 PM, temperatures 65 to 70 degrees with an east wind at 10 to 15 mph.
Racing starts at 7 PM - Temperatures should fall into the 50s between 7-10 PM Thursday with east winds at 10 to 15 mph.
Zero percent chance of rain!
Normal temperatures for Thursday
Sunrise Thursday: 6:29 AM CDT
Sunset Thursday: 7:47 PM CDT