Iowa City weather in June

In June, Iowa City sees average daytime highs of 80°F and overnight lows near 62°F, with 5.1 in of rain across 11.7 wet days and about 15 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 76°F in the first days to 82°F by the end. The sky is clear or mostly clear about 33% of the time in June, and the air most often feels muggy.

Daylight stretches from about 14 h 48 min at the start of June to 15 hours by month's end. Set against the rest of the year, June is Iowa City's 5th-clearest and 10th-windiest month. For the whole year in context, see Iowa City's year-round climate.

Daytime high
80°
3rd warmest
Overnight low
62°
10th coldest
Rainfall
5.1 in
11.7 wet days
Daylight
15 hours
4:36 AM – 7:36 PM
Cloud cover
57%
5th clearest
Wind
8 mph
10th windiest
Solar energy
6.36 kWh/m²
Travel score
6.3
out of 10

Iowa City is city in Johnson County, Iowa, United States.

Density
1,093/km²
people per km²
Founded
1839

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

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 76°F in the first days to 82°F by the end.

A typical June day in Iowa City reaches about 80°F in the afternoon and slips back to 62°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 88°F. Set against its neighbours, June runs about 9°F warmer than May and about 3°F cooler than July.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17658
27658
37658
47759
57759
67860
77860
87860
97861
107961
117961
127962
138062
148062
158062
168063
178063
188163
198163
208164
218164
228164
238164
248164
258164
268264
278264
288264
298265
308265

How June really feels in Iowa City

Once humidity and wind are folded in, June 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

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

Iowa City weather by month

How June compares with the rest of the year at a glance. June is the 3rd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan29° / 14°1.57.15.39.30.0
Feb33° / 18°1.86.44.210.30.0
Mar47° / 29°2.79.22.811.71.6
Apr60° / 41°4.411.80.813.14.5
May71° / 52°4.913.4014.36.0
Jun80° / 62°5.111.70156.3
Jul83° / 65°3.79.6014.76.1
Aug81° / 63°3.89.1013.76.8
Sep75° / 55°3.98.2012.37.2
Oct62° / 43°2.98.60.210.95.5
Nov47° / 31°2.37.71.59.71.7
Dec34° / 20°1.96.94.590.0

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in June.

Beyond those clear spells, partly cloudy skies cover about 16% of June, with mostly cloudy or overcast conditions the remaining 51%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14456
24456
34456
44555
54555
64654
74555
84654
94654
104654
114753
124753
134753
144753
154753
164852
174852
184951
195050
205149
215248
225149
235248
245347
255446
265446
275545
285545
295644
305743

Chance of precipitation in June

Any precipitation

Iowa City gets around 5.1 in of rain over 11.7 wet days in June, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 44% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
144
243
343
442
542
641
741
841
940
1040
1140
1240
1340
1440
1540
1640
1740
1839
1939
2039
2138
2238
2337
2436
2536
2636
2735
2835
2934
3034

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, June lands in the muggy band about 25% of days. Sticky, muggy-or-worse air turns up on roughly 32% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1462118141
2442218151
3432219161
4412319161
5392319171
6372419182
7362420182
8342520192
9322521203
10302521213
11282522223
12262522234
13242522245
14222523255
15202423266
16192424277
17182324287
18172324298
19162225298
20152225309
211422253010
221321253010
231221253111
241221253112
251121253113
261120253113
271020253014
281020253015
291020253016
30920243017

Wind in June

Winds average 8 mph in June.

Across June, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
307light breeze

Sunrise & sunset in June

DaylightNight

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

Days grow by about 12 minutes over June. Sunrise moves from 4:40 AM to 4:39 AM, and sunset from 7:27 PM to 7:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.84:407:27
214.84:407:28
314.84:397:29
414.84:397:30
514.94:387:30
614.94:387:31
714.94:387:32
814.94:377:32
914.94:377:33
1014.94:377:33
1115.04:377:34
1215.04:377:35
1315.04:367:35
1415.04:367:36
1515.04:367:36
1615.04:367:36
1715.04:367:37
1815.04:367:37
1915.04:367:38
2015.04:377:38
2115.04:377:38
2215.04:377:38
2315.04:377:39
2415.04:377:39
2515.04:387:39
2615.04:387:39
2715.04:387:39
2815.04:397:39
2915.04:397:39
3015.04:397:39

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 6.36 kWh/m².

For context, solar energy here swings from a low near 1.74 kWh/m² to a high of 6.39 kWh/m² in July across the year — June's 6.36 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.4Intense
176.4Intense
186.4Intense
196.4Intense
206.4Intense
216.5Intense
226.5Intense
236.5Intense
246.5Intense
256.5Intense
266.5Intense
276.5Intense
286.5Intense
296.5Intense
306.5Intense
Planning a trip in June

Is June a good time to visit Iowa City?

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

6.3
Sightseeing
3rd-best month of the year
6.2
Beach & pool
3rd-best month of the year

June is a reasonable time to visit Iowa City for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Iowa City in June

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

In June, Iowa City sees daytime highs around 80°F and nights near 62°F. Pack sun protection. Worth having: light clothes and rain gear. About 12 days see rain.

sun protectionlight clothesrain gear

UV index in Iowa City in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Iowa City peaks around June 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJun 19UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Iowa City in June

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where June falls, not just the annual average.

Air quality in Iowa City is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodJul 1916 µg/m³Oct 218 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb14Moderate
Mar14Moderate
Apr11Good
May13Moderate
Jun13Moderate
Jul17Moderate
Aug15Moderate
Sep12Good
Oct8Good
Nov8Good
Dec10Good
Location & terrain

Where is Iowa City?

Iowa City sits at 41.7°N, 91.5°W, 669 ft above sea level, in United States. The nearest listed city is Coralville, 3.1 mi away.

Topography around Iowa City

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

Within 2 miles, the terrain around Iowa City has only modest variations in elevation — a maximum elevation change of 223 ft around an average of 715 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 384 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 646 ft.

The land around Iowa City is covered by trees (50%) and artificial surfaces (31%) within 2 miles, cropland (57%) within 10 miles, and cropland (72%) within 50 miles.

2 miles
223 ft
10 miles
384 ft
50 miles
646 ft
treesgrasslandcroplandartificial surfaceswater
June weather nearby: Coralville 3.1 mi · North Liberty 6.8 mi · Cedar Rapids 25 mi · Marion 26 mi · Muscatine 30 mi · Davenport 50 mi · Rock Island 50 mi · Bettendorf 53 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 Iowa City (41.6611°, -91.5302°, elevation 669 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).