Marion weather in July

In July, Marion sees average daytime highs of 82°F and overnight lows near 65°F, with 3.8 in of rain across 9.7 wet days and about 14.7 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 82°F through the month. The sky is clear or mostly clear about 40% of the time in July, and the air most often feels muggy.

Daylight stretches from about 15 hours at the start of July to 14 h 18 min by month's end. Set against the rest of the year, July is Marion's 3rd-clearest and 11th-windiest month. For the whole year in context, see Marion's year-round climate.

Daytime high
82°
1st warmest
Overnight low
65°
12th coldest
Rainfall
3.8 in
9.7 wet days
Daylight
14 h 48 min
4:49 AM – 7:35 PM
Cloud cover
52%
3rd clearest
Wind
7 mph
11th windiest
Solar energy
6.39 kWh/m²
Travel score
6.4
out of 10

Marion is city in Linn County, Iowa, United States.

Density
810/km²
people per km²
Founded
1839

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 82°F through the month.

A typical July day in Marion reaches about 82°F in the afternoon and slips back to 65°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 90°F. Set against its neighbours, July runs about 3°F warmer than June and about 2°F warmer than August.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18264
28264
38264
48265
58265
68265
78265
88265
98265
108265
118265
128265
138265
148365
158365
168365
178365
188365
198365
208365
218265
228265
238265
248265
258265
268265
278265
288265
298264
308264
318264

How July really feels in Marion

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.

Marion weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan28° / 13°1.57.15.49.30.0
Feb33° / 17°1.76.44.410.30.0
Mar46° / 28°2.69311.71.4
Apr60° / 40°4.311.80.913.14.4
May70° / 51°4.912.8014.36.0
Jun79° / 62°5.1120156.3
Jul82° / 65°3.89.7014.76.4
Aug80° / 62°3.79.3013.76.8
Sep74° / 54°4.08.4012.37.1
Oct61° / 42°2.98.50.310.95.3
Nov47° / 30°2.37.51.69.61.5
Dec33° / 19°1.96.94.790.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 18% of July, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25644
35743
45743
55743
65743
75842
85842
95842
105842
115842
125842
135743
145743
155743
165743
175743
185644
195644
205743
215644
225644
235644
245743
255743
265743
275743
285842
295941
305941
315941

Chance of precipitation in July

Any precipitation

Marion gets around 3.8 in of rain over 9.7 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 32% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
134
234
334
433
533
633
733
833
933
1033
1133
1234
1334
1434
1534
1634
1734
1834
1933
2033
2133
2232
2332
2431
2531
2630
2730
2829
2929
3028
3128

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the muggy band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 49% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
111192529150
211192529160
311182529160
411182529160
510182629160
610182529171
79172630171
89172630171
98172631171
108162631171
117162632171
127162632182
136162632182
146162632182
156162631192
165162631193
175172631193
185172630203
195172530203
205172529203
215182529213
225182528213
235192527213
245202527213
256212526203
266212525203
276222525192
287222625182
297232624182
307232624172
318232724172

Wind in July

Winds average 7 mph in July.

Across July, 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.

0246810151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
37light breeze
47light breeze
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 hours at the start of July to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over July. Sunrise moves from 4:39 AM to 5:02 AM, and sunset from 7:41 PM to 7:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.04:397:41
215.04:397:40
315.04:407:40
415.04:407:40
515.04:417:40
615.04:427:40
715.04:427:39
814.94:437:39
914.94:437:39
1014.94:447:38
1114.94:457:38
1214.94:467:38
1314.84:467:37
1414.84:477:37
1514.84:487:36
1614.84:497:35
1714.84:497:35
1814.74:507:34
1914.74:517:33
2014.74:527:33
2114.74:537:32
2214.64:547:31
2314.64:557:30
2414.64:567:29
2514.54:577:29
2614.54:577:28
2714.54:587:27
2814.44:597:26
2914.45:007:25
3014.45:017:24
3114.35:027:23

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.39 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.73 kWh/m² to a high of 6.39 kWh/m² in July across the year — July's 6.39 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.5Intense
126.5Intense
136.4Intense
146.4Intense
156.4Intense
166.4Intense
176.4Intense
186.3Intense
196.3Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.1Intense
316.1Intense
Planning a trip in July

Is July a good time to visit Marion?

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

6.4
Sightseeing
3rd-best month of the year
6.9
Beach & pool
1st-best month of the year

July is a reasonable time to visit Marion for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Marion in July

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

In July, Marion sees daytime highs around 82°F and nights near 65°F. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

UV index in Marion in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Marion peaks around June 18 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 18UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul8Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low

Air quality in Marion in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Marion 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 Marion?

Marion sits at 42.0°N, 91.6°W, 850 ft above sea level, in United States. The nearest listed city is Cedar Rapids, 3.1 mi away.

Topography around Marion

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

Within 2 miles, the terrain around Marion has only modest variations in elevation — a maximum elevation change of 207 ft around an average of 833 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 515 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 738 ft.

The land around Marion is covered by artificial surfaces (41%), grassland (29%) and trees (26%) within 2 miles, cropland (48%) within 10 miles, and cropland (75%) within 50 miles.

2 miles
207 ft
10 miles
515 ft
50 miles
738 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Cedar Rapids 3.1 mi · North Liberty 20 mi · Coralville 25 mi · Iowa City 26 mi · Waterloo 50 mi · Muscatine 51 mi · Cedar Falls 55 mi · Dubuque 58 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 Marion (42.0342°, -91.5977°, elevation 850 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).