Southlake weather in December

In December, Southlake sees average daytime highs of 57°F and overnight lows near 39°F, with 3.1 in of precipitation across 6.5 wet days and about 9.9 hours of daylight. It is the 11th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 60°F in the first days to 55°F by the end. The sky is clear or mostly clear about 46% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 hours at the start of December to 9 h 54 min by month's end. Set against the rest of the year, December is Southlake's 7th-clearest and 7th-windiest month. For the whole year in context, see Southlake's year-round climate.

Daytime high
57°
11th warmest
Overnight low
39°
2nd coldest
Precipitation
3.1 in
6.5 wet days
Daylight
9 h 48 min
7:30 AM – 5:20 PM
Cloud cover
49%
7th clearest
Wind
8 mph
7th windiest
Solar energy
2.62 kWh/m²
Travel score
4.6
out of 10

Southlake is city in Tarrant and Denton counties, Texas, United States.

Density
514/km²
people per km²
Founded
1956

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 60°F in the first days to 55°F by the end.

A typical December day in Southlake reaches about 57°F in the afternoon and slips back to 39°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 43°F and 71°F. Set against its neighbours, December runs about 9°F cooler than November and on par with January.

20°40°60°80°151015202531
Avg high (°F)Avg low (°F)
16142
26142
36041
46041
56041
65940
75940
85940
95840
105840
115839
125839
135839
145739
155739
165739
175738
185738
195638
205638
215638
225638
235638
245638
255637
265637
275537
285537
295537
305537
315537

How December really feels in Southlake

Once humidity and wind are folded in, December averages 0 days that feel above 90°F and 12 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
12
wind chill below the day's low

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

Southlake weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan56° / 37°2.56.60.610.14.2
Feb60° / 41°2.770.610.85.3
Mar68° / 48°3.78.60.211.76.6
Apr75° / 55°3.87.8012.87.3
May83° / 64°5.010.8013.75.9
Jun90° / 72°3.38014.14.2
Jul94° / 76°1.85.40143.1
Aug94° / 75°2.05.1013.23.2
Sep87° / 68°2.76012.25.3
Oct77° / 57°3.77.3011.27.5
Nov66° / 47°3.26.4010.36.8
Dec57° / 39°3.16.50.39.94.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26040
36040
45941
55842
65941
75842
85842
95842
105743
115743
125743
135743
145743
155644
165743
175743
185743
195743
205644
215644
225644
235644
245644
255545
265545
275545
285545
295545
305545
315545

Chance of precipitation in December

Any precipitationSnow

Southlake gets around 3.1 in of rain and snow over 6.5 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 21% and peaks near 23% on the wettest days, and about 0 day brings snow.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
1200
2210
3210
4210
5220
6220
7220
8230
9230
10230
11230
12230
13230
14220
15220
16221
17221
18221
19211
20211
21211
22201
23202
24202
25202
26202
27202
28203
29203
30213
31213

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 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
18974
28974
39064
49064
59064
69064
79253
89253
99253
109253
119442
129442
139442
149541
159541
169631
179631
189631
199631
209631
219631
229541
239541
249541
259541
269442
279442
289352
299352
309352
319352

Wind in December

Winds average 8 mph in December.

Across December, daily wind ranges from about 8 mph on the calmest days to 9 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
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 10 hours at the start of December to 9 h 54 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 7:19 AM to 7:36 AM, and sunset from 5:18 PM to 5:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.07:195:18
210.07:205:18
310.07:205:18
49.97:215:18
59.97:225:18
69.97:235:18
79.97:235:18
89.97:245:18
99.97:255:18
109.97:265:18
119.97:265:19
129.97:275:19
139.97:285:19
149.87:285:19
159.87:295:20
169.87:305:20
179.87:305:20
189.87:315:21
199.87:315:21
209.87:325:21
219.87:325:22
229.87:335:22
239.87:335:23
249.87:345:23
259.87:345:24
269.87:345:24
279.87:355:25
289.87:355:25
299.87:355:26
309.87:365:27
319.97:365:27

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.62 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.62 kWh/m² to a high of 6.83 kWh/m² in July across the year — December's 2.62 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.8Moderate
22.8Moderate
32.7Moderate
42.7Moderate
52.7Moderate
62.7Moderate
72.7Moderate
82.6Moderate
92.6Moderate
102.6Moderate
112.6Moderate
122.6Moderate
132.6Moderate
142.6Moderate
152.6Moderate
162.6Moderate
172.6Moderate
182.6Moderate
192.6Moderate
202.6Moderate
212.6Moderate
222.6Moderate
232.6Moderate
242.6Moderate
252.6Moderate
262.6Moderate
272.6Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.7Moderate
Planning a trip in December

Is December a good time to visit Southlake?

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

4.6
Sightseeing
8th-best month of the year
0.1
Beach & pool
11th-best month of the year

December is a reasonable time to visit Southlake for sightseeing.

What to pack for Southlake in December

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

In December, Southlake sees daytime highs around 57°F and nights near 39°F. Worth packing: a warm layer. About 7 days see rain.

a warm layer

UV index in Southlake in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Southlake peaks around July 14 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 14UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr9Very high
May10Very high
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Southlake 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 Southlake is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1617 µg/m³Dec 136 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar9Good
Apr10Good
May13Moderate
Jun15Moderate
Jul18Moderate
Aug14Moderate
Sep10Good
Oct7Good
Nov6Good
Dec6Good
Location & terrain

Where is Southlake?

Southlake sits at 32.9°N, 97.1°W, 640 ft above sea level, in United States. The nearest listed city is Grapevine, 3.1 mi away.

Topography around Southlake

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

Within 2 miles, the terrain around Southlake has only modest variations in elevation — a maximum elevation change of 164 ft around an average of 630 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 413 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,047 ft.

The land around Southlake is covered by artificial surfaces (41%), trees (34%) and grassland (22%) within 2 miles, artificial surfaces (41%), trees (30%) and grassland (22%) within 10 miles, and grassland (49%) and trees (25%) within 50 miles.

2 miles
164 ft
10 miles
413 ft
50 miles
1,047 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Grapevine 3.1 mi · Colleyville 4.3 mi · Flower Mound 5.6 mi · Bedford 6.8 mi · Keller 6.8 mi · Coppell 6.8 mi · Euless 8.1 mi · Hurst 8.7 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 Southlake (32.9412°, -97.1342°, elevation 640 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).