Forest Park weather in December

In December, Forest Park sees average daytime highs of 56°F and overnight lows near 38°F, with 4.2 in of precipitation across 9.7 wet days and about 9.8 hours of daylight. It is the 11th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 59°F in the first days to 54°F by the end. The sky is clear or mostly clear about 35% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 54 min at the start of December to 9 h 48 min by month's end. Set against the rest of the year, December is Forest Park's 8th-clearest and 4th-windiest month. For the whole year in context, see Forest Park's year-round climate.

Daytime high
56°
11th warmest
Overnight low
38°
2nd coldest
Precipitation
4.2 in
9.7 wet days
Daylight
9 h 48 min
7:40 AM – 5:27 PM
Cloud cover
59%
8th clearest
Wind
7 mph
4th windiest
Solar energy
2.36 kWh/m²
Travel score
3.8
out of 10

Forest Park is city in Clayton County, Georgia, United States.

Density
801/km²
people per km²

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 59°F in the first days to 54°F by the end.

A typical December day in Forest Park reaches about 56°F in the afternoon and slips back to 38°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 44°F and 68°F. Set against its neighbours, December runs about 8°F cooler than November and about 2°F warmer than January.

20°40°60°80°151015202531
Avg high (°F)Avg low (°F)
16040
25940
35940
45940
55839
65839
75839
85739
95739
105739
115638
125638
135638
145638
155638
165638
175538
185538
195537
205537
215537
225537
235537
245537
255537
265437
275437
285437
295437
305437
315437

How December really feels in Forest Park

Once humidity and wind are folded in, December averages 0 days that feel above 90°F and 14 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
14
wind chill below the day's low

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

Forest Park 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
Jan54° / 36°4.010.10.6103.3
Feb58° / 39°4.39.50.310.84.3
Mar65° / 45°4.39.90.111.76.0
Apr73° / 52°3.18.8012.87.0
May81° / 61°2.99.5013.76.4
Jun87° / 69°3.813.9014.24.4
Jul89° / 72°4.015.30143.7
Aug88° / 71°3.813013.24.1
Sep83° / 65°3.68.6012.26.1
Oct74° / 53°2.96.6011.27.5
Nov64° / 43°3.68.2010.36.1
Dec56° / 38°4.29.70.29.83.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% 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 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
24951
34951
44852
54753
64654
74555
84654
94555
104555
114456
124456
134555
144456
154357
164357
174357
184357
194456
204456
214357
224357
234258
244258
254258
264258
274258
284258
294258
304258
314258

Chance of precipitation in December

Any precipitationSnow

Forest Park gets around 4.2 in of rain and snow over 9.7 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 32% and peaks near 34% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1290
2290
3290
4300
5300
6300
7300
8300
9301
10301
11311
12311
13311
14321
15321
16331
17331
18331
19341
20341
21341
22341
23341
24341
25341
26341
27341
28341
29331
30331
31332

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 91% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
189641
289641
390631
490631
590631
690631
790631
892620
992620
1092620
1192620
1292620
1392620
1492620
1592620
1692620
1792620
1892620
1992620
2092521
2192521
2292521
2391621
2491621
2591621
2691621
2790721
2890721
2989821
3089821
3190811

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 54 min at the start of December to 9 h 48 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 7:29 AM to 7:47 AM, and sunset from 5:25 PM to 5:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.97:295:25
29.97:305:25
39.97:315:25
49.97:325:25
59.97:335:25
69.97:335:25
79.97:345:25
89.87:355:25
99.87:365:25
109.87:365:26
119.87:375:26
129.87:385:26
139.87:385:26
149.87:395:26
159.87:405:27
169.87:405:27
179.87:415:27
189.87:415:28
199.87:425:28
209.87:425:29
219.87:435:29
229.87:435:29
239.87:445:30
249.87:445:30
259.87:455:31
269.87:455:31
279.87:465:32
289.87:465:33
299.87:465:33
309.87:465:34
319.87:475:35

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.36 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.36 kWh/m² to a high of 6.12 kWh/m² in May across the year — December's 2.36 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.6Moderate
22.6Moderate
32.5Moderate
42.5Moderate
52.5Moderate
62.5Moderate
72.5Moderate
82.4Moderate
92.4Moderate
102.4Moderate
112.4Moderate
122.4Moderate
132.4Moderate
142.3Moderate
152.3Moderate
162.3Moderate
172.3Moderate
182.3Moderate
192.3Moderate
202.3Moderate
212.3Moderate
222.3Moderate
232.3Moderate
242.3Moderate
252.3Moderate
262.3Moderate
272.3Moderate
282.3Moderate
292.3Moderate
302.3Moderate
312.3Moderate
Planning a trip in December

Is December a good time to visit Forest Park?

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

3.8
Sightseeing
10th-best month of the year
0.0
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Forest Park.

What to pack for Forest Park in December

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

In December, Forest Park sees daytime highs around 56°F and nights near 38°F. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

UV index in Forest Park in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Forest Park peaks around July 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 12UV 10Dec 19UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar5High
Apr7Very high
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep7Very high
Oct5High
Nov4Moderate
Dec3Moderate

Air quality in Forest Park 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 Forest Park is worst in July — around 21 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (January, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1621 µg/m³Jan 118 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar13Moderate
Apr12Moderate
May15Moderate
Jun18Moderate
Jul21Moderate
Aug18Moderate
Sep13Moderate
Oct11Good
Nov10Good
Dec8Good
Location & terrain

Where is Forest Park?

Forest Park sits at 33.6°N, 84.4°W, 988 ft above sea level, in United States. The nearest listed city is Riverdale, 4.3 mi away.

Topography around Forest Park

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

Within 2 miles, the terrain around Forest Park has only modest variations in elevation — a maximum elevation change of 220 ft around an average of 951 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 643 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,742 ft.

The land around Forest Park is covered by trees (52%) and artificial surfaces (36%) within 2 miles, trees (67%) and artificial surfaces (22%) within 10 miles, and trees (81%) within 50 miles.

2 miles
220 ft
10 miles
643 ft
50 miles
1,742 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Riverdale 4.3 mi · East Point 5.6 mi · Atlanta 8.7 mi · Candler-McAfee 9.3 mi · Stockbridge 9.3 mi · Union City 11 mi · Belvedere Park 11 mi · Decatur 11 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 Forest Park (33.6221°, -84.3691°, elevation 988 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).