Siloam Springs weather in December

In December, Siloam Springs sees average daytime highs of 48°F and overnight lows near 32°F, with 2.8 in of precipitation across 7.5 wet days and about 9.6 hours of daylight. It is the 11th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 52°F in the first days to 46°F by the end. The sky is clear or mostly clear about 40% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of December to 9 h 36 min by month's end. Set against the rest of the year, December is Siloam Springs's 7th-clearest and 6th-windiest month. For the whole year in context, see Siloam Springs's year-round climate.

Daytime high
48°
11th warmest
Overnight low
32°
2nd coldest
Precipitation
2.8 in
7.5 wet days
Daylight
9 h 30 min
7:28 AM – 5:01 PM
Cloud cover
55%
7th clearest
Wind
7 mph
6th windiest
Solar energy
2.23 kWh/m²
Travel score
2.0
out of 10

Siloam Springs is city in Arkansas, United States.

Density
557/km²
people per km²
Founded
1881

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 52°F in the first days to 46°F by the end.

A typical December day in Siloam Springs reaches about 48°F in the afternoon and slips back to 32°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 34°F and 62°F. Set against its neighbours, December runs about 10°F cooler than November and about 2°F warmer than January.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
15235
25235
35134
45134
55134
65033
75033
85033
94933
104933
114932
124932
134932
144832
154832
164831
174831
184831
194731
204731
214731
224731
234731
244730
254730
264730
274630
284630
294630
304630
314630

How December really feels in Siloam Springs

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
wind chill below the day's low

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

Siloam Springs weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan46° / 29°2.67.11.79.81.5
Feb51° / 32°2.67.21.510.62.7
Mar60° / 40°4.110.21.111.74.8
Apr68° / 49°5.411012.96.2
May76° / 58°5.412.80.113.96.4
Jun84° / 67°4.211014.45.4
Jul89° / 71°3.39.7014.24.2
Aug89° / 69°2.99013.44.5
Sep82° / 62°4.07.8012.26.7
Oct70° / 50°4.08.2011.17.1
Nov58° / 40°3.380.310.14.7
Dec48° / 32°2.87.51.59.62.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 9% of December, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25248
35149
45149
55050
64951
74951
84951
94951
104951
114852
124852
134852
144852
154852
164852
174852
184951
194951
205050
214951
224951
235050
245050
255050
265050
275050
285149
295050
305050
315050

Chance of precipitation in December

Any precipitationSnow

Siloam Springs gets around 2.8 in of rain and snow over 7.5 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 25% and peaks near 26% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1264
2264
3264
4265
5265
6265
7265
8265
9265
10265
11265
12265
13265
14264
15264
16264
17264
18264
19254
20254
21244
22234
23234
24234
25225
26225
27225
28225
29225
30235
31236

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1964
2964
3964
4964
5964
6964
7973
8973
9973
10982
11982
12982
13982
14991
15991
16991
17991
18991
19991
20991
21991
22982
23982
24982
25982
26982
27973
28973
29973
30973
31973

Wind in December

Winds average 7 mph in December.

Across December, 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
38light breeze
48light breeze
58light breeze
68light breeze
77light breeze
87light breeze
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267light breeze
277light breeze
287light breeze
297light breeze
307light breeze
317light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 42 min at the start of December to 9 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 7:16 AM to 7:34 AM, and sunset from 4:59 PM to 5:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:164:59
29.77:174:59
39.77:184:59
49.77:194:59
59.77:204:59
69.67:214:59
79.67:214:59
89.67:224:59
99.67:234:59
109.67:244:59
119.67:245:00
129.67:255:00
139.67:265:00
149.67:275:00
159.67:275:01
169.57:285:01
179.57:285:01
189.57:295:01
199.57:305:02
209.57:305:02
219.57:315:03
229.57:315:03
239.57:325:04
249.57:325:04
259.57:325:05
269.57:335:05
279.57:335:06
289.57:335:06
299.67:345:07
309.67:345:08
319.67:345:08

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.23 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.23 kWh/m² to a high of 6.57 kWh/m² in July across the year — December's 2.23 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.3Moderate
22.3Moderate
32.3Moderate
42.3Moderate
52.3Moderate
62.3Moderate
72.3Moderate
82.2Moderate
92.2Moderate
102.2Moderate
112.2Moderate
122.2Moderate
132.2Moderate
142.2Moderate
152.2Moderate
162.2Moderate
172.2Moderate
182.2Moderate
192.2Moderate
202.2Moderate
212.2Moderate
222.2Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.2Moderate
272.2Moderate
282.3Moderate
292.3Moderate
302.3Moderate
312.3Moderate
Planning a trip in December

Is December a good time to visit Siloam Springs?

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

2.0
Sightseeing
11th-best month of the year
0.0
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Siloam Springs.

What to pack for Siloam Springs in December

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

In December, Siloam Springs sees daytime highs around 48°F and nights near 32°F. Pack a warm layer. About 8 days see rain.

a warm layer

UV index in Siloam Springs 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 Siloam Springs peaks around July 12 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highHighModerateJul 12UV 10Dec 22UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep8Very high
Oct5High
Nov4Moderate
Dec2Moderate

Air quality in Siloam Springs 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 Siloam Springs is worst in July — around 19 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (November, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodJul 1518 µg/m³Nov 236 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar12Moderate
Apr11Good
May13Moderate
Jun16Moderate
Jul19Moderate
Aug15Moderate
Sep11Good
Oct7Good
Nov6Good
Dec6Good
Location & terrain

Where is Siloam Springs?

Siloam Springs sits at 36.2°N, 94.5°W, 1,132 ft above sea level, in United States. The nearest listed city is Bentonville, 22 mi away.

Topography around Siloam Springs

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

Within 2 miles, the terrain around Siloam Springs has only modest variations in elevation — a maximum elevation change of 207 ft around an average of 1,142 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 640 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,031 ft.

The land around Siloam Springs is covered by grassland (40%), trees (32%) and artificial surfaces (21%) within 2 miles, trees (47%) and grassland (43%) within 10 miles, and trees (60%) and grassland (33%) within 50 miles.

2 miles
207 ft
10 miles
640 ft
50 miles
2,031 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Bentonville 22 mi · Springdale 23 mi · Fayetteville 23 mi · Bella Vista 25 mi · Rogers 25 mi · Tahlequah 30 mi · Van Buren 53 mi · Muskogee 55 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 Siloam Springs (36.1881°, -94.5405°, elevation 1,132 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).