Editing Duluth, Minnesota (section)

===Climate===
[[File:Duluth blizzard, December 2007.jpg|thumb|Late-winter blizzard, March 2007]]

{{climate chart
| Duluth
|2.4|19.9|0.95
|6.0|24.8|1.01
|17.8|36.2|1.46
|29.9|49.2|2.53
|41.0|63.0|3.37
|50.2|72.1|4.39
|56.2|77.7|3.92
|55.2|75.8|3.73
|47.3|67.2|3.48
|35.6|52.7|2.91
|22.5|37.1|1.96
|9.6|24.7|1.47
|float     =
|clear     =
|units     = imperial
}}

Duluth has a [[humid continental climate]] ([[Köppen climate classification|Köppen]] ''Dfb''), slightly moderated by its proximity to Lake Superior. Winters are long, snowy, and very cold, normally seeing maximum temperatures remaining at or below {{convert|32|F|C}} for 100 days (the second-most of any city in the contiguous US behind [[International Falls, Minnesota|International Falls]]), falling to or below {{convert|0|°F}} on 38 nights, and bringing consistent snow cover from late November to early April.<ref name="Duluth NOAA" /> Winter storms that pass south or east of Duluth can often set up easterly or northeasterly flow, leading to occasional upslope lake-effect snow events that bring {{one2a|{{convert|1|ft|cm|0}}}} or more of snow to the city while areas {{convert|50|mi|km}} inland receive considerably less. The average annual snowfall is {{convert|90.2|in}}. The lake steams in the winter when moist lake-warmed air at the surface rises and cools, losing some of its moisture-carrying capacity.<ref name="superior">{{Cite web |title=Duluth Minnesota Travel - Things to do and see |url=http://www.superiortrails.com/duluth_1.html |url-status=live |archive-url=https://web.archive.org/web/20120628231401/http://www.superiortrails.com/duluth_1.html |archive-date=June 28, 2012 |access-date=June 24, 2012}}</ref>

Using data on the minimum monthly temperature between 1981 and 2010, the [[National Oceanic and Atmospheric Administration]] (NOAA) developed a Comparative Climatic Data report. With a minimum average monthly low temperature of {{convert|1.5|°F}} and a maximum average monthly low temperature of {{convert|55.4|°F}}, Duluth was found to be the fifth-coldest city in the United States.<ref name="USA TODAY">{{Cite news |date=February 28, 2015 |title=Brrrr: America's 50 coldest cities |url=https://www.usatoday.com/story/money/business/2015/02/28/247-wall-st-coldest-cities/24107481/ |url-status=live |access-date=April 23, 2017 |archive-url=https://web.archive.org/web/20170423153831/https://www.usatoday.com/story/money/business/2015/02/28/247-wall-st-coldest-cities/24107481/ |archive-date=April 23, 2017}}</ref>

Summers are warm, although nights are generally cool, with daytime temperatures averaging {{convert|78|°F}} in July, with that figure being a few degrees warmer inland. Temperatures reach or exceed {{convert|90|°F}} on average, only two days per year, while the city has officially seen {{convert|100|°F}} temperatures on only three days, all during the [[1936 North American heat wave|July 1936 heat wave]] from the [[Dust Bowl]] years.<ref name="Duluth NOAA" /> The phrase "cooler by the lake" can be heard often in weather forecasts during the summer, especially on days when an easterly wind is expected. Great local variations are also common because of the rapid change in elevation between the nearly {{convert|900|ft|m|adj=on}} hilltop and shoreside. Often, this variation manifests itself as snow in higher elevations, whereas rain falls near Lake Superior.<ref name="superior" />

The record low temperature in Duluth is {{convert|-41|°F}}, set on January 2, 1885. The record high temperature is {{convert|106|°F}}, set on July 13, 1936. On average, the first freezing temperature occurs on September 30 and the last on May 14, although a freezing temperature has occurred in August. The average window for measurable (≥{{convert|0.1|in|cm|abbr=on|disp=or}}) snowfall is October 22 through April 26.<ref name="Duluth NOAA" />

{{wide image|File:Duluth, Minnesota (2017).jpg|1000px|Skyline in summer, August 2017}}

{{Duluth, Minnesota weatherbox}}
{{Weather box
|location = [[Superior, Wisconsin|Superior]], Wisconsin (adjacent to Duluth, 1991–2020 normals, extremes 1909–present)
|collapsed = Y
|single line = Y
|Jan record high F = 55
|Feb record high F = 60
|Mar record high F = 80
|Apr record high F = 92
|May record high F = 96
|Jun record high F = 98
|Jul record high F = 105
|Aug record high F = 99
|Sep record high F = 97
|Oct record high F = 89
|Nov record high F = 79
|Dec record high F = 60
|year record high F = 105
|Jan avg record high F = 41.3
|Feb avg record high F = 45.0
|Mar avg record high F = 56.7
|Apr avg record high F = 70.4
|May avg record high F = 82.3
|Jun avg record high F = 87.3
|Jul avg record high F = 91.1
|Aug avg record high F = 89.4
|Sep avg record high F = 83.3
|Oct avg record high F = 74.7
|Nov avg record high F = 57.1
|Dec avg record high F = 43.0
|year avg record high F = 92.7
|Jan high F = 22.5
|Feb high F = 26.9
|Mar high F = 36.1
|Apr high F = 46.0
|May high F = 57.4
|Jun high F = 67.0
|Jul high F = 76.1
|Aug high F = 74.8
|Sep high F = 66.6
|Oct high F = 53.0
|Nov high F = 39.1
|Dec high F = 27.3
|year high F = 49.4
|Jan mean F = 14.1
|Feb mean F = 18.0
|Mar mean F = 28.5
|Apr mean F = 38.9
|May mean F = 49.1
|Jun mean F = 58.2
|Jul mean F = 67.1
|Aug mean F = 66.4
|Sep mean F = 58.4
|Oct mean F = 45.8
|Nov mean F = 32.4
|Dec mean F = 20.2
|year mean F = 41.4
|Jan low F = 5.8
|Feb low F = 9.1
|Mar low F = 21.0
|Apr low F = 31.8
|May low F = 40.9
|Jun low F = 49.5
|Jul low F = 58.0
|Aug low F = 58.0
|Sep low F = 50.1
|Oct low F = 38.6
|Nov low F = 25.6
|Dec low F = 13.1
|year low F = 33.5
|Jan avg record low F = -17.2
|Feb avg record low F = -10.9
|Mar avg record low F = -1.4
|Apr avg record low F = 18.3
|May avg record low F = 30.6
|Jun avg record low F = 39.2
|Jul avg record low F = 47.1
|Aug avg record low F = 47.0
|Sep avg record low F = 35.3
|Oct avg record low F = 25.1
|Nov avg record low F = 7.9
|Dec avg record low F = -9.3
|year avg record low F = -19.5
|Jan record low F = −37
|Feb record low F = −38
|Mar record low F = −38
|Apr record low F = -2
|May record low F = 11
|Jun record low F = 25
|Jul record low F = 34
|Aug record low F = 31
|Sep record low F = 19
|Oct record low F = 9
|Nov record low F = −19
|Dec record low F = −32
|year record low F = -38
|precipitation colour = green
|Jan precipitation inch = 0.81
|Feb precipitation inch = 0.89
|Mar precipitation inch = 1.41
|Apr precipitation inch = 2.64
|May precipitation inch = 3.37
|Jun precipitation inch = 4.56
|Jul precipitation inch = 3.88
|Aug precipitation inch = 3.92
|Sep precipitation inch = 3.39
|Oct precipitation inch = 3.17
|Nov precipitation inch = 2.12
|Dec precipitation inch = 1.29
|year precipitation inch = 31.45
|Jan snow inch = 14.5
|Feb snow inch = 12.4
|Mar snow inch = 9.1
|Apr snow inch = 1.7
|May snow inch = 0.0
|Jun snow inch = 0.0
|Jul snow inch = 0.0
|Aug snow inch = 0.0
|Sep snow inch = 0.0
|Oct snow inch = 0.2
|Nov snow inch = 5.8
|Dec snow inch = 12.3
|year snow inch = 56.0
|unit precipitation days = 0.01 in
|Jan precipitation days = 7.1
|Feb precipitation days = 5.6
|Mar precipitation days = 7.1
|Apr precipitation days = 8.8
|May precipitation days = 11.6
|Jun precipitation days = 11.5
|Jul precipitation days = 10.4
|Aug precipitation days = 9.6
|Sep precipitation days = 9.9
|Oct precipitation days = 9.7
|Nov precipitation days = 8.1
|Dec precipitation days = 7.0
|year precipitation days = 106.4
|unit snow days = 0.1 in
|Jan snow days = 6.8
|Feb snow days = 5.2
|Mar snow days = 3.7
|Apr snow days = 1.6
|May snow days = 0.0
|Jun snow days = 0.0
|Jul snow days = 0.0
|Aug snow days = 0.0
|Sep snow days = 0.0
|Oct snow days = 0.1
|Nov snow days = 3.1
|Dec snow days = 5.7
|year snow days = 26.2
|source 1 = [[NOAA]]<ref name="nws">{{Cite web 
|title = NowData - NOAA Online Weather Data 
|url = https://w2.weather.gov/climate/xmacis.php?wfo=dlh 
|access-date = June 13, 2021 
|publisher = National Oceanic and Atmospheric Administration 
|archive-date = May 9, 2021 
|archive-url = https://web.archive.org/web/20210509024006/https://w2.weather.gov/climate/xmacis.php?wfo=dlh 
|url-status = dead 
}}</ref><ref name="NCEI">{{Cite web 
|title = Station: Superior, WI 
|url = https://www.ncei.noaa.gov/access/services/data/v1?dataset=normals-monthly-1991-2020&startDate=0001-01-01&endDate=9996-12-31&stations=USC00478349&format=pdf 
|access-date = June 13, 2021 
|website = U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020) 
|publisher = National Oceanic and Atmospheric Administration
|archive-url = https://web.archive.org/web/20240118225329/https://www.ncei.noaa.gov/access/services/data/v1?dataset=normals-monthly-1991-2020&startDate=0001-01-01&endDate=9996-12-31&stations=USC00478349&format=pdf
|archive-date = January 18, 2024}}</ref>
}}