Ankeny weather in December

In December, Ankeny sees average daytime highs of 34°F and overnight lows near 19°F, with 1.6 in of precipitation across 5.9 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 39°F in the first days to 31°F by the end. The sky is clear or mostly clear about 29% 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 Ankeny's 11th-clearest and 8th-windiest month. For the whole year in context, see Ankeny's year-round climate.

Daytime high
34°
10th warmest
Overnight low
19°
3rd coldest
Precipitation
1.6 in
5.9 wet days
Daylight
9 hours
7:41 AM – 4:40 PM
Cloud cover
64%
11th clearest
Wind
9 mph
8th windiest
Solar energy
1.79 kWh/m²
Travel score
0.0
out of 10

Ankeny is city in Polk County, Iowa, United States.

Density
746/km²
people per km²
Founded
1854

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 39°F in the first days to 31°F by the end.

A typical December day in Ankeny reaches about 34°F in the afternoon and slips back to 19°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 18°F and 49°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)
14024
23923
33923
43822
53822
63722
73721
83721
93621
103620
113520
123520
133519
143419
153419
163419
173419
183318
193318
203318
213318
223318
233217
243217
253217
263217
273116
283116
293116
303116
313115

How December really feels in Ankeny

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.

Ankeny 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
Jan29° / 13°1.26.34.99.30.0
Feb34° / 17°1.56.54.710.30.0
Mar47° / 29°2.68.82.811.71.7
Apr61° / 40°4.411.20.913.14.7
May71° / 52°5.513.70.114.36.0
Jun80° / 62°5.011.90156.2
Jul84° / 66°3.89.5014.75.8
Aug82° / 63°4.09.5013.76.6
Sep75° / 55°3.68.3012.37.2
Oct62° / 42°2.98.10.410.95.6
Nov47° / 30°2.16.71.39.61.8
Dec34° / 19°1.65.94.190.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% 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 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24258
34258
44159
54258
64258
74258
84258
94258
104258
114159
124159
134258
144159
154159
164060
174060
184060
193961
203961
213862
223862
233862
243862
253961
263862
273763
283862
293862
303862
313961

Chance of precipitation in December

Any precipitationSnow

Ankeny gets around 1.6 in of rain and snow over 5.9 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 20% and peaks near 22% on the wettest days, and about 4 days bring snow.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
12210
22111
32111
42011
52012
62012
72012
82012
91912
101913
111913
121913
131913
141913
152013
162013
172013
182013
192013
202013
211913
221913
231913
241913
251913
261913
271913
281913
291913
301913
311913

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
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
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 7:28 AM to 7:47 AM, and sunset from 4:40 PM to 4:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.27:284:40
29.27:294:40
39.27:304:40
49.17:314:39
59.17:324:39
69.17:334:39
79.17:344:39
89.17:354:39
99.17:364:39
109.07:374:39
119.07:374:39
129.07:384:39
139.07:394:39
149.07:404:40
159.07:404:40
169.07:414:40
179.07:424:40
189.07:424:41
199.07:434:41
209.07:434:42
219.07:444:42
229.07:444:42
239.07:454:43
249.07:454:43
259.07:464:44
269.07:464:45
279.07:464:45
289.07:474:46
299.07:474:46
309.07:474:47
319.07:474:48

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.79 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.79 kWh/m² to a high of 6.46 kWh/m² in July across the year — December's 1.79 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.9Dim
21.9Dim
31.9Dim
41.8Dim
51.8Dim
61.8Dim
71.8Dim
81.8Dim
91.8Dim
101.8Dim
111.8Dim
121.8Dim
131.8Dim
141.8Dim
151.8Dim
161.8Dim
171.8Dim
181.8Dim
191.8Dim
201.8Dim
211.8Dim
221.8Dim
231.8Dim
241.8Dim
251.8Dim
261.8Dim
271.8Dim
281.8Dim
291.8Dim
301.8Dim
311.8Dim
Planning a trip in December

Is December a good time to visit Ankeny?

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 Ankeny.

What to pack for Ankeny in December

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

In December, Ankeny sees daytime highs around 34°F and nights near 19°F. Pack a warm layer and a heavy coat. About 6 days see rain.

a warm layera heavy coat

UV index in Ankeny 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 Ankeny peaks around June 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 20UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May7High
Jun9Very high
Jul9Very high
Aug7Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Ankeny 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 Ankeny is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodJul 2016 µg/m³Oct 217 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb15Moderate
Mar14Moderate
Apr11Good
May11Good
Jun12Moderate
Jul16Moderate
Aug14Moderate
Sep12Good
Oct7Good
Nov9Good
Dec10Good
Location & terrain

Where is Ankeny?

Ankeny sits at 41.7°N, 93.6°W, 991 ft above sea level, in United States. The nearest listed city is Johnston, 6.2 mi away.

Topography around Ankeny

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

Within 2 miles, the terrain around Ankeny has only modest variations in elevation — a maximum elevation change of 135 ft around an average of 955 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 272 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 719 ft.

The land around Ankeny is covered by artificial surfaces (41%), grassland (28%) and trees (24%) within 2 miles, cropland (44%) and trees (21%) within 10 miles, and cropland (67%) within 50 miles.

2 miles
135 ft
10 miles
272 ft
50 miles
719 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Johnston 6.2 mi · Des Moines 8.7 mi · Urbandale 8.7 mi · Altoona 9.3 mi · Clive 11 mi · West Des Moines 12 mi · Waukee 17 mi · Ames 21 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 Ankeny (41.7297°, -93.6058°, elevation 991 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).