Gallatin weather in December

In December, Gallatin sees average daytime highs of 49°F and overnight lows near 34°F, with 5.0 in of precipitation across 10.9 wet days and about 9.6 hours of daylight. It is the 11th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 52°F in the first days to 47°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 42 min at the start of December to 9 h 30 min by month's end. Set against the rest of the year, December is Gallatin's 11th-clearest and 5th-windiest month. For the whole year in context, see Gallatin's year-round climate.

Daytime high
49°
11th warmest
Overnight low
34°
3rd coldest
Precipitation
5.0 in
10.9 wet days
Daylight
9 h 30 min
6:56 AM – 4:28 PM
Cloud cover
65%
11th clearest
Wind
7 mph
5th windiest
Solar energy
1.96 kWh/m²
Travel score
2.0
out of 10

Gallatin is city in and the county seat of Sumner County, Tennessee, United States.

Density
418/km²
people per km²
Founded
1802

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 47°F by the end.

A typical December day in Gallatin reaches about 49°F in the afternoon and slips back to 34°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 36°F and 63°F. Set against its neighbours, December runs about 9°F cooler than November and about 3°F warmer than January.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
15337
25337
35236
45236
55136
65136
75135
85035
95035
105035
115035
124935
134935
144934
154934
164934
174934
184934
194834
204834
214833
224833
234833
244833
254733
264733
274733
284733
294733
304733
314733

How December really feels in Gallatin

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.

Gallatin weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan46° / 31°4.210.61.89.81.2
Feb50° / 34°4.610.61.710.62.2
Mar60° / 41°5.011.40.711.74.5
Apr69° / 50°5.111.20.112.96.2
May77° / 60°4.912.5013.96.3
Jun85° / 68°3.912.2014.45.0
Jul88° / 71°3.912.5014.24.2
Aug87° / 70°3.210.4013.44.6
Sep82° / 62°3.37.9012.26.5
Oct71° / 51°3.77.80.111.17.1
Nov58° / 40°4.090.310.14.5
Dec49° / 34°5.010.919.62.0

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 8% of December, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34258
44159
54159
64060
73961
83961
93763
103664
113664
123565
133565
143565
153466
163466
173466
183466
193466
203565
213565
223565
233565
243565
253565
263565
273664
283763
293763
303763
313664

Chance of precipitation in December

Any precipitationSnow

Gallatin gets around 5.0 in of rain and snow over 10.9 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 36% and peaks near 38% on the wettest days, and about 1 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1352
2352
3352
4363
5363
6363
7373
8373
9373
10373
11373
12373
13373
14373
15383
16383
17373
18373
19373
20373
21363
22363
23354
24354
25354
26344
27344
28344
29345
30345
31345

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 96% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19541
29541
39541
49541
59541
69541
79541
89541
99541
109640
119640
129640
139730
149730
159730
169631
179631
189631
199631
209721
219631
229631
239631
249631
259631
269631
279541
289541
299541
309541
319541

Wind in December

Winds average 7 mph in December.

Across December, daily wind ranges from about 7 mph on the calmest days to 7 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
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 42 min at the start of December to 9 h 30 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 6:45 AM to 7:02 AM, and sunset from 4:27 PM to 4:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.76:454:27
29.76:454:26
39.76:464:26
49.76:474:26
59.66:484:26
69.66:494:26
79.66:504:26
89.66:504:26
99.66:514:26
109.66:524:27
119.66:534:27
129.66:534:27
139.56:544:27
149.56:554:27
159.56:554:28
169.56:564:28
179.56:574:28
189.56:574:29
199.56:584:29
209.56:584:29
219.56:594:30
229.56:594:30
239.57:004:31
249.57:004:31
259.57:014:32
269.57:014:32
279.57:014:33
289.57:024:33
299.57:024:34
309.57:024:35
319.57:024:35

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.96 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.96 kWh/m² to a high of 6.22 kWh/m² in June across the year — December's 1.96 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.1Moderate
22.1Moderate
32.1Moderate
42.0Moderate
52.0Moderate
62.0Moderate
72.0Dim
82.0Dim
92.0Dim
101.9Dim
111.9Dim
121.9Dim
131.9Dim
141.9Dim
151.9Dim
161.9Dim
171.9Dim
181.9Dim
191.9Dim
201.9Dim
211.9Dim
221.9Dim
231.9Dim
241.9Dim
252.0Dim
262.0Dim
272.0Dim
282.0Dim
292.0Dim
302.0Dim
312.0Moderate
Planning a trip in December

Is December a good time to visit Gallatin?

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 Gallatin.

What to pack for Gallatin in December

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

In December, Gallatin sees daytime highs around 49°F and nights near 34°F. Pack a warm layer. Worth having: rain gear. About 11 days see rain.

a warm layerrain gear

UV index in Gallatin 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 Gallatin peaks around July 11 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highHighModerateJul 11UV 9Dec 21UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug8Very high
Sep7High
Oct5Moderate
Nov4Moderate
Dec2Moderate

Air quality in Gallatin 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 Gallatin is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (November, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1518 µg/m³Nov 216 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar10Good
Apr10Good
May14Moderate
Jun16Moderate
Jul19Moderate
Aug14Moderate
Sep11Good
Oct7Good
Nov6Good
Dec7Good
Location & terrain

Where is Gallatin?

Gallatin sits at 36.4°N, 86.4°W, 538 ft above sea level, in United States. The nearest listed city is Hendersonville, 11 mi away.

Topography around Gallatin

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

Within 2 miles, the terrain around Gallatin has only modest variations in elevation — a maximum elevation change of 256 ft around an average of 548 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 771 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,919 ft.

The land around Gallatin is covered by trees (37%), grassland (34%) and artificial surfaces (21%) within 2 miles, trees (50%) and grassland (36%) within 10 miles, and trees (56%) and grassland (27%) within 50 miles.

2 miles
256 ft
10 miles
771 ft
50 miles
1,919 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Hendersonville 11 mi · Mount Juliet 14 mi · Lebanon 15 mi · Goodlettsville 16 mi · Hermitage 17 mi · Nashville 24 mi · Springfield 25 mi · La Vergne 27 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 Gallatin (36.3884°, -86.4467°, elevation 538 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).