Climate averages 1991–2020
Duluth weather
in July.
A warm, wet month: the warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Duluth: daytime highs average 23.9°C and nights cool to about 17.8°C. By daytime temperature it is the warmest month of the year.
Expect about 98 mm of rain on roughly 12 days, which makes July a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 28 min on an average July day.
The nearest other city in this atlas is Brooklyn Park (211 km away). In July its highs average 27.2°C, 3.3°C warmer than Duluth, with 90 mm of rain.
Among the 498 cities listed in the United States, Duluth ranks joint 484th of 498 for the warmest July highs and joint 370th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Duluth is 6.4°C cooler than that mean.
From July to August, average highs fall by 0.3°C to 23.6°C, and monthly rainfall rises from 98 mm to 102 mm.
The annual picture
July in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Duluth climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -7.2°C-13.9°C | -13.9°C | 26 | 6.3 | 9.09 h |
| February | -5.2°C-12.0°C | -12.0°C | 28 | 5.4 | 10.310 h |
| March | 0.5°C-6.1°C | -6.1°C | 49 | 7.3 | 11.912 h |
| April | 6.5°C-0.2°C | -0.2°C | 84 | 10.2 | 13.614 h |
| May | 13.4°C6.5°C | 6.5°C | 97 | 11.1 | 15.015 h |
| June | 19.6°C13.2°C | 13.2°C | 105 | 11.6 | 15.816 h |
| July, selected | 23.9°C17.8°C | 17.8°C | 98 | 11.7 | 15.515 h |
| August | 23.6°C17.8°C | 17.8°C | 102 | 10.5 | 14.214 h |
| September | 19.5°C13.8°C | 13.8°C | 92 | 10.6 | 12.613 h |
| October | 11.6°C6.6°C | 6.6°C | 103 | 10.8 | 10.911 h |
| November | 3.6°C-1.1°C | -1.1°C | 66 | 8.9 | 9.49 h |
| December | -3.2°C-8.8°C | -8.8°C | 45 | 7.5 | 8.69 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Brooklyn Park in JulyUnited States · 211 kmHigh 27.2°C · Low 18.5°C · 90 mm rain
- Saint Paul in JulyUnited States · 218 kmHigh 27.3°C · Low 18.6°C · 89 mm rain
- Minneapolis in JulyUnited States · 220 kmHigh 27.4°C · Low 18.6°C · 90 mm rain
- Plymouth, United States in JulyUnited States · 223 kmHigh 27.1°C · Low 18.5°C · 90 mm rain
- Bloomington (Minnesota), United States in JulyUnited States · 235 kmHigh 27.4°C · Low 19.0°C · 91 mm rain
- Thunder Bay in JulyCanada · 278 kmHigh 22.3°C · Low 15.3°C · 76 mm rain
- Rochester (Minnesota), United States in JulyUnited States · 308 kmHigh 26.5°C · Low 18.0°C · 97 mm rain
- Fargo in JulyUnited States · 356 kmHigh 26.7°C · Low 16.9°C · 95 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Duluth) is explained once on the Duluth year overview and on the Sources, method and limits page.