Cedar Rapids weather in August

In August, Cedar Rapids sees average daytime highs of 81°F and overnight lows near 62°F, with 3.7 in of rain across 9.3 wet days and about 13.7 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 81°F through the month. The sky is clear or mostly clear about 42% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 18 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Cedar Rapids's 2nd-clearest and 12th-windiest month. For the whole year in context, see Cedar Rapids's year-round climate.

Daytime high
81°
2nd warmest
Overnight low
62°
11th coldest
Rainfall
3.7 in
9.3 wet days
Daylight
13 h 42 min
5:19 AM – 7:02 PM
Cloud cover
50%
2nd clearest
Wind
7 mph
12th windiest
Solar energy
5.58 kWh/m²
Travel score
6.8
out of 10

Cedar Rapids is city in and seat of Linn County, Iowa, United States.

Density
699/km²
people per km²
Founded
1849

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 81°F through the month.

A typical August day in Cedar Rapids reaches about 81°F in the afternoon and slips back to 62°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 73°F and 88°F. Set against its neighbours, August runs about 2°F cooler than July and about 6°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18264
28264
38264
48264
58164
68163
78163
88163
98163
108163
118163
128163
138162
148062
158062
168062
178062
188062
198062
208062
218062
228062
238062
248062
258062
268061
278061
288061
298061
308060
317960

How August really feels in Cedar Rapids

Once humidity and wind are folded in, August 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

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

Cedar Rapids weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan28° / 13°1.575.39.30.0
Feb33° / 17°1.66.34.410.30.0
Mar46° / 28°2.68.62.911.71.4
Apr60° / 40°4.411.80.913.14.4
May70° / 51°5.013.2014.36.0
Jun79° / 62°5.111.90156.3
Jul82° / 65°3.99.9014.76.2
Aug81° / 62°3.79.3013.76.8
Sep74° / 54°3.98.4012.37.1
Oct61° / 42°2.98.60.410.95.3
Nov47° / 30°2.37.41.69.61.5
Dec34° / 19°1.86.94.790.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 39%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36040
46040
56139
66139
76139
86040
96040
106040
116040
126040
136139
146040
156040
166040
176040
186040
196040
206040
216040
226040
236040
246040
256139
266139
276238
286238
296337
306337
316436

Chance of precipitation in August

Any precipitation

Cedar Rapids gets around 3.7 in of rain over 9.3 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 30% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
129
229
329
429
529
629
730
830
930
1030
1130
1230
1331
1431
1531
1631
1731
1831
1931
2031
2131
2230
2330
2430
2529
2629
2728
2827
2927
3026
3126

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 27% of days. Sticky, muggy-or-worse air turns up on roughly 38% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
17222824172
27222824171
37222924161
48222924161
58222924161
69223024151
79213024151
810213024141
910213025141
1010212925141
1111212925131
1211212925131
1311212925131
1412222826121
1512222826121
1612222726120
1713222727110
1813222727110
1913222628110
2013222628110
2113232528110
2213232528100
2314232528100
2414232428100
2515232427100
2616242427100
2717242426100
281824242690
291924232590
302124232480
312224232380

Wind in August

Winds average 7 mph in August, the calmest month.

Across August, 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
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297light breeze
307light breeze
318light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 18 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over August. Sunrise moves from 5:04 AM to 5:35 AM, and sunset from 7:22 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.35:047:22
214.35:057:21
314.25:067:19
414.25:077:18
514.25:087:17
614.15:097:16
714.15:107:14
814.05:117:13
914.05:127:12
1014.05:137:11
1113.95:147:09
1213.95:157:08
1313.85:167:06
1413.85:177:05
1513.85:187:03
1613.75:197:02
1713.75:207:01
1813.65:216:59
1913.65:236:57
2013.55:246:56
2113.55:256:54
2213.55:266:53
2313.45:276:51
2413.45:286:50
2513.35:296:48
2613.35:306:46
2713.25:316:45
2813.25:326:43
2913.15:336:41
3013.15:346:40
3113.05:356:38

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.58 kWh/m².

For context, solar energy here swings from a low near 1.73 kWh/m² to a high of 6.38 kWh/m² in July across the year — August's 5.58 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.0Intense
36.0Intense
46.0Bright
55.9Bright
65.9Bright
75.9Bright
85.8Bright
95.8Bright
105.8Bright
115.7Bright
125.7Bright
135.7Bright
145.6Bright
155.6Bright
165.6Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.4Bright
225.4Bright
235.4Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in August

Is August a good time to visit Cedar Rapids?

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

6.8
Sightseeing
2nd-best month of the year
6.9
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Cedar Rapids for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Cedar Rapids in August

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

In August, Cedar Rapids sees daytime highs around 81°F and nights near 62°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Cedar Rapids in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cedar Rapids 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 Cedar Rapids in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Cedar Rapids 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 Cedar Rapids?

Cedar Rapids sits at 42.0°N, 91.6°W, 810 ft above sea level, in United States. The nearest listed city is Marion, 3.1 mi away.

Topography around Cedar Rapids

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

Within 2 miles, the terrain around Cedar Rapids has only modest variations in elevation — a maximum elevation change of 272 ft around an average of 814 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 446 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 738 ft.

The land around Cedar Rapids is covered by artificial surfaces (46%) and trees (32%) within 2 miles, cropland (46%), trees (20%) and grassland (20%) within 10 miles, and cropland (76%) within 50 miles.

2 miles
272 ft
10 miles
446 ft
50 miles
738 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Marion 3.1 mi · North Liberty 18 mi · Coralville 23 mi · Iowa City 25 mi · Waterloo 49 mi · Muscatine 51 mi · Cedar Falls 55 mi · Dubuque 60 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 Cedar Rapids (42.0083°, -91.6441°, elevation 810 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).