Duluth weather in July: Duluth, Minnesota: normal highs, lows, rain and records for July
Duluth in July has a normal high of 78°F and a normal low of 56°F, a daily mean of 67°F, rising from 76°F on the 1st to 78°F by the 31st. Measurable precipitation falls on 12 days in a normal July, 3.92 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 13°C, 100 mm of precipitation in July.
- NOAA stationDuluth International Airport
- Station IDUSW00014913
- Location46.84°N 92.21°W
- Elevation1,428 ft (435 m)
- From the center6 miles
- Population87,986
- Jan 20° 2°
- Feb 25° 6°
- Mar 36° 18°
- Apr 49° 30°
- May 63° 41°
- Jun 72° 50°
- Jul 78° 56°
- Aug 76° 55°
- Sep 67° 47°
- Oct 53° 36°
- Nov 37° 23°
- Dec 25° 10°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Duluth in July?
The normal high is 78°F and the normal low 56°F, for a daily mean of 67.0°F. July is 5.8°F warmer than June and 1.5°F warmer than August. July is the warmest month of the year in Duluth and the 2nd wettest. Across the month the normal high rises 2°F, from 76°F on July 1 to 78°F on July 31. From one year to the next July's mean temperature typically moves about 2.9°F either way (NOAA's standard deviation), so roughly two Julys in three average between 64°F and 70°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 42%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 76°F | 54°F | 42% | 26% |
| July 8 | 77°F | 56°F | 41% | 24% |
| July 15 | 78°F | 57°F | 39% | 23% |
| July 22 | 78°F | 57°F | 37% | 21% |
| July 31 | 78°F | 57°F | 36% | 21% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 23, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 76°F | 54°F | 42% | 26% | 15 h 50 min |
| July 2 | 76°F | 55°F | 42% | 26% | 15 h 50 min |
| July 3 | 76°F | 55°F | 42% | 25% | 15 h 50 min |
| July 4 | 77°F | 55°F | 41% | 25% | 15 h 50 min |
| July 5 | 77°F | 55°F | 41% | 25% | 15 h 50 min |
| July 6 | 77°F | 55°F | 41% | 25% | 15 h 40 min |
| July 7 | 77°F | 56°F | 41% | 25% | 15 h 40 min |
| July 8 | 77°F | 56°F | 41% | 24% | 15 h 40 min |
| July 9 | 77°F | 56°F | 41% | 24% | 15 h 40 min |
| July 10 | 78°F | 56°F | 40% | 24% | 15 h 40 min |
| July 11 | 78°F | 56°F | 40% | 24% | 15 h 40 min |
| July 12 | 78°F | 56°F | 40% | 23% | 15 h 40 min |
| July 13 | 78°F | 56°F | 40% | 23% | 15 h 40 min |
| July 14 | 78°F | 56°F | 39% | 23% | 15 h 30 min |
| July 15 | 78°F | 57°F | 39% | 23% | 15 h 30 min |
| July 16 | 78°F | 57°F | 39% | 22% | 15 h 30 min |
| July 17 | 78°F | 57°F | 39% | 22% | 15 h 30 min |
| July 18 | 78°F | 57°F | 38% | 22% | 15 h 30 min |
| July 19 | 78°F | 57°F | 38% | 22% | 15 h 20 min |
| July 20 | 78°F | 57°F | 38% | 22% | 15 h 20 min |
| July 21 | 78°F | 57°F | 38% | 21% | 15 h 20 min |
| July 22 | 78°F | 57°F | 37% | 21% | 15 h 20 min |
| July 23 | 78°F | 57°F | 37% | 21% | 15 h 20 min |
| July 24 | 78°F | 57°F | 37% | 21% | 15 h 10 min |
| July 25 | 78°F | 57°F | 37% | 21% | 15 h 10 min |
| July 26 | 78°F | 57°F | 37% | 21% | 15 h 10 min |
| July 27 | 78°F | 57°F | 37% | 21% | 15 h 10 min |
| July 28 | 78°F | 57°F | 37% | 21% | 15 h 10 min |
| July 29 | 78°F | 57°F | 37% | 21% | 15 h |
| July 30 | 78°F | 57°F | 36% | 21% | 15 h |
| July 31 | 78°F | 57°F | 36% | 21% | 15 h |
- Normal high
- 78°FJuly average
- Normal low
- 56°FJuly average
- Precipitation
- 3.92 inmonth total
- Days with precipitation
- 120.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 15 h 50 min to 15 hJuly 1 to July 31
- Days at 70°F or more
- 26
- Days at 80°F or more
- 12
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014913; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Duluth in July?
On a given July day the chance of 0.01 inch or more is 39% on average, highest around July 1 (42%). In all, 3.92 in falls on 12 days of a normal July, 1 of them with an inch or more.
In a normal July in Duluth, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014913.
How humid and windy is Duluth in July?
At 3 p.m. the normal temperature is 75°F with 54% relative humidity and a dew point of 57°F; at 6 a.m. it is 60°F with 87% humidity. The wind averages 8.1 mph, most often from the west in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 60°F | 56°F | 87% | 6.5 mph | 56% |
| 9 a.m. | 69°F | 58°F | 68% | 9.0 mph | 60% |
| noon | 73°F | 57°F | 57% | 10.7 mph | 38% |
| 3 p.m. | 75°F | 57°F | 54% | 10.8 mph | 44% |
| 6 p.m. | 72°F | 57°F | 60% | 8.9 mph | 53% |
| 9 p.m. | 64°F | 57°F | 78% | 6.2 mph | 66% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014913. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for July in Duluth?
The warmest July temperature on Duluth's official record (since 1874) is 106°F, on July 13, 1936; the coldest is 35°F, on July 1, 1988. The wettest July brought 10.83 in (1909).
The July mean against the 1991-2020 normal of 67.0°F: 2021 68.2°F (+1.2), 2022 66.8°F (−0.2), 2023 65.5°F (−1.5), 2024 68.8°F (+1.8), 2025 66.5°F (−0.5), 2026 71.2°F (+4.2). 3 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 68.2°F | +1.2°F | 2.75 in |
| 2022 | 66.8°F | −0.2°F | 3.83 in |
| 2023 | 65.5°F | −1.5°F | 1.37 in |
| 2024 | 68.8°F | +1.8°F | 1.34 in |
| 2025 | 66.5°F | −0.5°F | 3.75 in |
| 2026 | 71.2°F | +4.2°F | 4.69 in |
Source: records: ACIS, NWS threaded record DLHthr; recent months: ACIS, station USW00014913. Records and recent months use complete months only.
How does July in Duluth compare across Minnesota?
Across the 129 places PlainClimate covers in Minnesota, July normal highs run from 70°F in Grand Marais to 85°F in Granite Falls; Duluth's is 78°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.