Cedar Rapids weather in December

In December, Cedar Rapids sees average daytime highs of 34°F and overnight lows near 19°F, with 1.8 in of precipitation across 6.9 wet days and about 9 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 38°F in the first days to 30°F by the end. The sky is clear or mostly clear about 25% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 12 min at the start of December to 9 hours by month's end. Set against the rest of the year, December is Cedar Rapids's 11th-clearest and 7th-windiest month. For the whole year in context, see Cedar Rapids's year-round climate.

Daytime high
34°
10th warmest
Overnight low
19°
3rd coldest
Precipitation
1.8 in
6.9 wet days
Daylight
9 hours
7:34 AM – 4:31 PM
Cloud cover
67%
11th clearest
Wind
9 mph
7th windiest
Solar energy
1.73 kWh/m²
Travel score
0.0
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 December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 38°F in the first days to 30°F by the end.

A typical December day in Cedar Rapids reaches about 34°F in the afternoon and slips back to 19°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 17°F and 48°F. Set against its neighbours, December runs about 13°F cooler than November and about 5°F warmer than January.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
13924
23824
33823
43823
53722
63722
73621
83621
93521
103520
113520
123420
133420
143319
153319
163319
173319
183218
193218
203218
213218
223218
233117
243117
253117
263117
273117
283116
293016
303016
313016

How December really feels in Cedar Rapids

Once humidity and wind are folded in, December averages 0 days that feel above 90°F and 31 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
31
31 feel bitter (≤ 14°F)

The story in December is cold — wind chill drags the overnight "feels like" below the raw low.

Cedar Rapids weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 10th-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23961
33961
43961
53961
63862
73961
83961
93862
103862
113862
123763
133763
143763
153763
163763
173664
183763
193664
203664
213664
223664
233664
243565
253664
263664
273664
283565
293664
303565
313565

Chance of precipitation in December

Any precipitationSnow

Cedar Rapids gets around 1.8 in of rain and snow over 6.9 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 22% and peaks near 23% on the wettest days, and about 5 days bring snow.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
12311
22312
32312
42313
52313
62314
72314
82315
92315
102315
112215
122215
132215
142215
152215
162215
172215
182215
192215
202215
212215
222215
232215
242215
252215
262215
272215
282215
292215
302214
312214

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 9 mph in December.

Across December, daily wind ranges from about 9 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
110light 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
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze
3110light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 12 min at the start of December to 9 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:21 AM to 7:40 AM, and sunset from 4:31 PM to 4:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.27:214:31
29.17:224:31
39.17:234:31
49.17:244:31
59.17:254:31
69.17:264:30
79.17:274:30
89.07:284:30
99.07:294:30
109.07:304:30
119.07:304:30
129.07:314:31
139.07:324:31
149.07:334:31
159.07:334:31
169.07:344:31
178.97:354:32
188.97:354:32
198.97:364:32
208.97:364:33
218.97:374:33
228.97:374:34
238.97:384:34
248.97:384:35
258.97:394:35
268.97:394:36
278.97:394:36
289.07:404:37
299.07:404:38
309.07:404:38
319.07:404:39

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.73 kWh/m² — the year's lowest.

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 — December's 1.73 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.8Dim
21.8Dim
31.8Dim
41.8Dim
51.8Dim
61.8Dim
71.8Dim
81.7Dim
91.7Dim
101.7Dim
111.7Dim
121.7Dim
131.7Dim
141.7Dim
151.7Dim
161.7Dim
171.7Dim
181.7Dim
191.7Dim
201.7Dim
211.7Dim
221.7Dim
231.7Dim
241.7Dim
251.7Dim
261.7Dim
271.8Dim
281.8Dim
291.8Dim
301.8Dim
311.8Dim
Planning a trip in December

Is December a good time to visit Cedar Rapids?

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

0.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Cedar Rapids.

What to pack for Cedar Rapids in December

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

In December, Cedar Rapids sees daytime highs around 34°F and nights near 19°F. Pack a warm layer and a heavy coat. About 7 days see rain.

a warm layera heavy coat

UV index in Cedar Rapids in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. 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 December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December 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
December 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).