Duluth weather in July

In July, Duluth sees average daytime highs of 73°F and overnight lows near 64°F, with 3.9 in of rain across 11.7 wet days and about 15.3 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 71°F in the first days to 74°F by the end. The sky is clear or mostly clear about 38% of the time in July, and the air most often feels humid.

Daylight stretches from about 15 h 36 min at the start of July to 14 h 48 min by month's end. Set against the rest of the year, July is Duluth's 1st-clearest and 12th-windiest month. For the whole year in context, see Duluth's year-round climate.

Daytime high
73°
2nd warmest
Overnight low
64°
11th coldest
Rainfall
3.9 in
11.7 wet days
Daylight
15 h 18 min
4:35 AM – 7:53 PM
Cloud cover
52%
1st clearest
Wind
9 mph
12th windiest
Solar energy
6.06 kWh/m²
Travel score
6.7
out of 10

Duluth is city in Minnesota, United States; county seat of St. Louis County.

Density
364/km²
people per km²
Founded
1679

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 71°F in the first days to 74°F by the end.

A typical July day in Duluth reaches about 73°F in the afternoon and slips back to 64°F overnight — a 10°F spread between the day's warmth and the night's chill. On most days the high lands between 66°F and 81°F. Set against its neighbours, July runs about 8°F warmer than June and on par with August.

50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
17161
27161
37161
47162
57262
67262
77262
87262
97363
107363
117363
127363
137364
147364
157464
167464
177464
187464
197464
207464
217464
227465
237465
247465
257465
267465
277465
287465
297465
307465
317465

How July really feels in Duluth

Once humidity and wind are folded in, July averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

July sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Duluth weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan19° / 1.06.36.98.80.0
Feb22° / 10°1.15.35.6100.0
Mar31° / 20°1.97.35.111.60.0
Apr41° / 31°3.310.24.213.30.4
May53° / 42°3.811.10.514.82.9
Jun65° / 55°4.111.6015.65.5
Jul73° / 64°3.911.7015.36.7
Aug73° / 64°4.010.50146.9
Sep66° / 56°3.610.7012.45.9
Oct52° / 44°4.110.80.810.62.8
Nov38° / 30°2.68.959.20.1
Dec26° / 17°1.87.47.88.40.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in July, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of July, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25050
35149
45149
55347
65347
75347
85446
95446
105545
115644
125644
135743
145842
155842
165941
176040
186040
196139
206139
216238
226337
236337
246535
256535
266535
276733
286733
296733
306733
316634

Chance of precipitation in July

Any precipitation

Duluth gets around 3.9 in of rain over 11.7 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 41% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
141
241
341
441
541
641
740
840
940
1039
1139
1238
1338
1438
1537
1637
1737
1837
1937
2037
2137
2236
2336
2436
2536
2635
2735
2835
2934
3034
3134

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the humid band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 20% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
129312992
2283130102
3273230102
4253230112
5243230112
6233230123
7223230123
8213231133
9203131144
10203131154
11193131154
12183030165
13183030175
14173030175
15173030175
16172930185
17172930186
18162931186
19162931186
20162931186
21162932186
22162932176
23162932176
24162933176
25162933166
26163033166
27163033155
28173033155
29173033155
30172933155
31182933155

Wind in July

Winds average 9 mph in July, the calmest month.

Across July, daily wind ranges from about 9 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 h 36 min at the start of July to 14 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over July. Sunrise moves from 4:23 AM to 4:51 AM, and sunset from 8:00 PM to 7:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.64:238:00
215.64:248:00
315.64:248:00
415.64:258:00
515.64:267:59
615.54:267:59
715.54:277:59
815.54:287:58
915.54:297:58
1015.54:297:57
1115.44:307:57
1215.44:317:56
1315.44:327:56
1415.44:337:55
1515.34:347:54
1615.34:357:53
1715.34:367:53
1815.34:377:52
1915.24:387:51
2015.24:397:50
2115.24:407:49
2215.14:417:48
2315.14:427:47
2415.14:437:46
2515.04:447:45
2615.04:457:44
2714.94:467:43
2814.94:487:42
2914.94:497:40
3014.84:507:39
3114.84:517:38

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.06 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.21 kWh/m² to a high of 6.06 kWh/m² in July across the year — July's 6.06 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.0Intense
176.0Intense
186.0Intense
196.0Intense
206.0Intense
216.0Intense
226.0Bright
236.0Bright
246.0Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.8Bright
315.8Bright
Planning a trip in July

Is July a good time to visit Duluth?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.7
Sightseeing
2nd-best month of the year
5.1
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Duluth for sightseeing.

What to pack for Duluth in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Duluth sees daytime highs around 73°F and nights near 64°F. Pack sun protection. Worth having: light clothes and rain gear. About 12 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Duluth in July

The nearest coast averages about 55°F in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 12 mi away) is warmest in August at about 62°F and coldest in February near 34°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

30°40°50°60°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°F)Comfort
Jan36Bracing
Feb34Bracing
Mar34Bracing
Apr36Bracing
May38Bracing
Jun44Bracing
Jul55Bracing
Aug62Cool
Sep58Bracing
Oct50Bracing
Nov43Bracing
Dec38Bracing

UV index in Duluth in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Duluth peaks around June 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 17UV 8Jan 11UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May6High
Jun8Very high
Jul7High
Aug7High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Duluth?

Duluth sits at 46.8°N, 92.1°W, 702 ft above sea level, in United States. The nearest listed city is Superior, 4.3 mi away.

Topography around Duluth

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Duluth.

Within 2 miles, the terrain around Duluth has only modest variations in elevation — a maximum elevation change of 778 ft around an average of 856 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 938 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,401 ft.

The land around Duluth is covered by trees (33%), water (30%) and artificial surfaces (28%) within 2 miles, trees (51%) and water (31%) within 10 miles, and trees (76%) within 50 miles.

2 miles
778 ft
10 miles
938 ft
50 miles
1,401 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Superior 4.3 mi · Hibbing 59 mi · Forest Lake 112 mi · Ham Lake 119 mi · Andover 121 mi · Lino Lakes 122 mi · Ramsey 124 mi · Elk River 124 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Duluth (46.7833°, -92.1066°, elevation 702 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).