Duluth Weather: September
 |
Average Day Temperature: | 68.8°F |
|
Average Night Temperature: | 55.4°F |
|
Sea Water Temperature: | 63.7°F |
|
Number of Sunny Days: | 12 days |
| Sunshine Hours: | 11.7 - 13.3 hours | |
|
Number of Rainy Days: | 1 day |
| Precipitation Totals: | 0.7 in | |
| detailed information | ||
forecast
| Duluth |
Temperature
| Duluth |
Air Temperature in September, °F
The highest day temperature in September 2026 was 82°F. The lowest night temperature was 47°F. The average values for day and night temperatures during September were 65.8°F и 58.5°F respectivly.
Duluth Water Sea Temperature in September, °F
The average sea surface temperature in September 2026 for Duluth was 63.7°F. The maximum and minimum values were 58.8°F and 69.8°F respectively.
Most of the days in September are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Duluth is 0.7 in.
The average wind speed in September is 7.3 mph. This value is relatively stable throughout the year.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Duluth in September is 7.1 hours.
Duluth on the Weather Map
| Boston |  |
+58 |
| Chicago | |
+58 |
| Hawaii | |
+80 |
| Houston |  |
+74 |
| Las Vegas |  |
+64 |
| Los Angeles | |
+74 |
| Maui | |
+72 |
| Miami | |
+82 |
| New York | |
+62 |
| Panama City Beach | |
+64 |
| San Diego | |
+74 |
| San Francisco | |
+60 |
| Santa Monica | |
+72 |
| Tampa | |
+74 |
| Washington | |
+58 |
| 0000 |  |
40°F | W 11 mph |
| 0300 | |
40°F | W 13 mph |
| 0600 | |
40°F | W 14 mph |
| 0900 | |
42°F | W 14 mph |
| 1200 | |
42°F | W 13 mph |
| 1500 | |
44°F | W 9 mph |
| 1800 |  |
46°F | W 6 mph |
| 2100 | |
46°F | SW 4 mph |