Farmington weather in December

In December, Farmington sees average daytime highs of 44°F and overnight lows near 29°F, with 2.8 in of precipitation across 8.1 wet days and about 9.4 hours of daylight. It is the 11th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 48°F in the first days to 42°F by the end. The sky is clear or mostly clear about 33% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of December to 9 h 24 min by month's end. Set against the rest of the year, December is Farmington's 10th-clearest and 6th-windiest month. For the whole year in context, see Farmington's year-round climate.

Daytime high
44°
11th warmest
Overnight low
29°
3rd coldest
Precipitation
2.8 in
8.1 wet days
Daylight
9 h 24 min
7:16 AM – 4:40 PM
Cloud cover
62%
10th clearest
Wind
8 mph
6th windiest
Solar energy
1.99 kWh/m²
Travel score
0.9
out of 10

Farmington is city in and county seat of St. Francois County, Missouri, United States.

Density
764/km²
people per km²
Founded
1822

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 48°F in the first days to 42°F by the end.

A typical December day in Farmington reaches about 44°F in the afternoon and slips back to 29°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 30°F and 58°F. Set against its neighbours, December runs about 10°F cooler than November and about 3°F warmer than January.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
14933
24833
34832
44732
54732
64631
74631
84631
94631
104530
114530
124530
134530
144429
154429
164429
174429
184429
194429
204329
214328
224328
234328
244328
254328
264228
274228
284227
294227
304227
314227

How December really feels in Farmington

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.

Farmington weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan41° / 26°2.88.22.69.70.1
Feb46° / 29°2.77.62.610.51.3
Mar56° / 37°4.011.21.411.73.7
Apr66° / 47°5.011.70.112.95.8
May74° / 57°4.913.20146.3
Jun83° / 66°3.711.6014.65.5
Jul87° / 69°3.511.3014.34.6
Aug86° / 67°3.09.8013.55.2
Sep79° / 59°3.28012.37.1
Oct67° / 48°3.48.40116.6
Nov55° / 37°3.68.70.6103.6
Dec44° / 29°2.88.11.99.40.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 10% of December, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24555
34555
44456
54456
64456
74258
84258
94258
104357
114357
124258
134258
144357
154357
164258
174258
184258
194258
204357
214258
224258
234258
244258
254159
264258
274159
284159
294258
304159
314159

Chance of precipitation in December

Any precipitationSnow

Farmington gets around 2.8 in of rain and snow over 8.1 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 27% and peaks near 28% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1285
2285
3285
4285
5286
6286
7286
8286
9286
10286
11286
12285
13285
14285
15285
16285
17285
18285
19275
20276
21266
22266
23256
24256
25256
26257
27247
28247
29247
30257
31258

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 (%)
1973
2973
3973
4973
5973
6973
7982
8982
9982
10982
11982
12991
13991
14991
15991
16991
17991
18991
191000
20991
21991
22991
23991
24991
25991
26982
27982
28982
29982
30982
31973

Wind in December

Winds average 8 mph in December.

Across December, daily wind ranges from about 8 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
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 36 min at the start of December to 9 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:04 AM to 7:22 AM, and sunset from 4:39 PM to 4:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.67:044:39
29.67:054:39
39.57:064:38
49.57:074:38
59.57:084:38
69.57:094:38
79.57:094:38
89.57:104:38
99.57:114:38
109.47:124:39
119.47:124:39
129.47:134:39
139.47:144:39
149.47:154:39
159.47:154:39
169.47:164:40
179.47:174:40
189.47:174:40
199.47:184:41
209.47:184:41
219.47:194:42
229.47:194:42
239.47:204:43
249.47:204:43
259.47:204:44
269.47:214:44
279.47:214:45
289.47:224:45
299.47:224:46
309.47:224:47
319.47:224:47

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.99 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.99 kWh/m² to a high of 6.44 kWh/m² in June across the year — December's 1.99 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.1Moderate
22.1Moderate
32.1Moderate
42.1Moderate
52.1Moderate
62.0Moderate
72.0Moderate
82.0Moderate
92.0Moderate
102.0Dim
112.0Dim
122.0Dim
132.0Dim
142.0Dim
152.0Dim
161.9Dim
171.9Dim
181.9Dim
191.9Dim
202.0Dim
212.0Dim
222.0Dim
232.0Dim
242.0Dim
252.0Dim
262.0Dim
272.0Dim
282.0Moderate
292.0Moderate
302.0Moderate
312.0Moderate
Planning a trip in December

Is December a good time to visit Farmington?

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

0.9
Sightseeing
11th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Farmington.

What to pack for Farmington in December

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

In December, Farmington sees daytime highs around 44°F and nights near 29°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 8 days see rain.

a warm layera heavy coatrain gear

UV index in Farmington 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 Farmington peaks around June 21 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 highHighModerateJun 21UV 10Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar6High
Apr7Very high
May8Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep7High
Oct4Moderate
Nov4Moderate
Dec2Moderate

Air quality in Farmington 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 Farmington is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (November, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1316 µg/m³Nov 176 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb9Good
Mar11Good
Apr9Good
May12Good
Jun14Moderate
Jul16Moderate
Aug12Moderate
Sep10Good
Oct6Good
Nov6Good
Dec6Good
Location & terrain

Where is Farmington?

Farmington sits at 37.8°N, 90.4°W, 912 ft above sea level, in United States. The nearest listed city is Arnold, 45 mi away.

Topography around Farmington

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

Within 2 miles, the terrain around Farmington has only modest variations in elevation — a maximum elevation change of 361 ft around an average of 922 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,014 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,562 ft.

The land around Farmington is covered by grassland (42%) and trees (34%) within 2 miles, trees (63%) and grassland (31%) within 10 miles, and trees (73%) within 50 miles.

2 miles
361 ft
10 miles
1,014 ft
50 miles
1,562 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Arnold 45 mi · Oakville 48 mi · Mehlville 50 mi · Concord 52 mi · Lemay 53 mi · Affton 53 mi · Kirkwood 55 mi · Webster Groves 56 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 Farmington (37.7809°, -90.4218°, elevation 912 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).