Fleming Island weather in December

In December, Fleming Island sees average daytime highs of 68°F and overnight lows near 49°F, with 2.2 in of rain across 6.9 wet days and about 10.1 hours of daylight. It is the 11th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 70°F in the first days to 66°F by the end. The sky is clear or mostly clear about 34% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 12 min at the start of December to 10 h 06 min by month's end. Set against the rest of the year, December is Fleming Island's 8th-clearest and 6th-windiest month. For the whole year in context, see Fleming Island's year-round climate.

Daytime high
68°
11th warmest
Overnight low
49°
3rd coldest
Rainfall
2.2 in
6.9 wet days
Daylight
10 h 06 min
7:21 AM – 5:25 PM
Cloud cover
56%
8th clearest
Wind
6 mph
6th windiest
Solar energy
2.81 kWh/m²
Travel score
6.8
out of 10

Fleming Island is census-designated place in Clay County, Florida.

Density
453/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 70°F in the first days to 66°F by the end.

A typical December day in Fleming Island reaches about 68°F in the afternoon and slips back to 49°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 56°F and 78°F. Set against its neighbours, December runs about 5°F cooler than November and about 2°F warmer than January.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17051
27051
37051
47051
57051
66950
76950
86950
96950
106950
116850
126849
136849
146849
156849
166849
176749
186749
196748
206748
216748
226748
236748
246748
256748
266648
276648
286648
296648
306647
316647

How December really feels in Fleming Island

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

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Fleming Island 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 daysDaylight (hours)Travel score
Jan66° / 46°2.67.310.36.5
Feb69° / 49°2.46.610.96.8
Mar74° / 53°2.97.311.87.4
Apr79° / 59°2.3712.77.2
May85° / 66°2.99.113.55.5
Jun88° / 72°5.418.813.93.4
Jul90° / 74°5.521.113.72.9
Aug89° / 74°6.222.313.13.0
Sep86° / 72°5.116.512.24.2
Oct80° / 64°2.89.211.36.7
Nov73° / 55°1.6610.57.5
Dec68° / 49°2.26.910.16.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25644
35644
45545
55446
65347
75347
85248
95248
105149
115050
125050
135050
144951
154852
164951
174951
184852
194852
204852
214852
224951
234852
244753
254753
264654
274555
284555
294555
304555
314555

Chance of precipitation in December

Any precipitation

Fleming Island gets around 2.2 in of rain over 6.9 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 23% and peaks near 25% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
119
219
319
419
520
620
721
821
922
1022
1123
1223
1324
1424
1524
1625
1725
1825
1925
2025
2125
2224
2324
2424
2524
2624
2723
2823
2923
3022
3122

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 59% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
152192081
253192080
354191980
454191980
554191980
655191880
755191880
855191880
955191880
1056191780
1156191780
1256191780
1358181680
1458181680
1559181580
1661171570
1761171570
1863161470
1963161470
2063161470
2164161370
2264161370
2364161370
2464161370
2564161370
2664161370
2764161370
2863171280
2963171280
3064171270
3164171270

Wind in December

Winds average 6 mph in December.

Across December, daily wind ranges from about 6 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 12 min at the start of December to 10 h 06 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 7:11 AM to 7:27 AM, and sunset from 5:23 PM to 5:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.27:115:23
210.27:115:23
310.27:125:23
410.27:135:23
510.27:145:23
610.17:145:23
710.17:155:23
810.17:165:23
910.17:165:23
1010.17:175:24
1110.17:185:24
1210.17:185:24
1310.17:195:24
1410.17:205:25
1510.17:205:25
1610.17:215:25
1710.17:215:26
1810.17:225:26
1910.17:235:26
2010.17:235:27
2110.17:245:27
2210.17:245:28
2310.17:255:28
2410.17:255:29
2510.17:255:29
2610.17:265:30
2710.17:265:30
2810.17:275:31
2910.17:275:31
3010.17:275:32
3110.17:275:33

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.81 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.81 kWh/m² to a high of 6.32 kWh/m² in May across the year — December's 2.81 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
13.0Moderate
23.0Moderate
32.9Moderate
42.9Moderate
52.9Moderate
62.9Moderate
72.9Moderate
82.8Moderate
92.8Moderate
102.8Moderate
112.8Moderate
122.8Moderate
132.8Moderate
142.8Moderate
152.8Moderate
162.8Moderate
172.8Moderate
182.8Moderate
192.8Moderate
202.8Moderate
212.8Moderate
222.8Moderate
232.8Moderate
242.8Moderate
252.8Moderate
262.8Moderate
272.8Moderate
282.8Moderate
292.8Moderate
302.8Moderate
312.8Moderate
Planning a trip in December

Hazard calendar for Fleming Island

In seasonPeak

None of Fleming Island's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Fleming Island sits in the Atlantic hurricane belt; the season peaks August–October.

Fleming Island's rainy season runs May–October, when most of the year's rain falls.

Atlantic hurricane
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Fleming Island?

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

6.8
Sightseeing
4th-best month of the year
3.5
Beach & pool
11th-best month of the year

December is a reasonable time to visit Fleming Island for sightseeing.

What to pack for Fleming Island in December

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

In December, Fleming Island sees daytime highs around 68°F and nights near 49°F. Little to plan around — just the basics. About 7 days see rain.

Sea temperature near Fleming Island in December

The nearest coast averages about 65°F in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 29 mi away) is warmest in August at about 82°F and coldest in February near 61°F.

It's comfortable for a long swim from Apr 13 to Nov 28 — about 7.6 months when the water holds above 68°F.

60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan62Cool
Feb61Cool
Mar63Cool
Apr69Refreshing
May75Refreshing
Jun80Warm
Jul82Warm
Aug82Tropical
Sep82Warm
Oct78Warm
Nov70Refreshing
Dec65Cool

UV index in Fleming Island in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Fleming Island peaks around June 21 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 21UV 11Dec 19UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7Very high
Apr7High
May9Very high
Jun11Extreme
Jul10Extreme
Aug10Very high
Sep8Very high
Oct6High
Nov5Moderate
Dec4Moderate

Air quality in Fleming Island 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 Fleming Island is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1618 µg/m³Dec 138 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb13Moderate
Mar12Moderate
Apr13Moderate
May14Moderate
Jun16Moderate
Jul18Moderate
Aug16Moderate
Sep12Good
Oct8Good
Nov8Good
Dec7Good
Location & terrain

Where is Fleming Island?

Fleming Island sits at 30.1°N, 81.7°W, 20 ft above sea level, in United States. The nearest listed city is Lakeside, 3.7 mi away.

Topography around Fleming Island

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

Within 2 miles, the terrain around Fleming Island has only modest variations in elevation — a maximum elevation change of 79 ft around an average of 23 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 164 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 308 ft.

The land around Fleming Island is covered by trees (61%) within 2 miles, trees (59%) within 10 miles, and trees (65%) and water (23%) within 50 miles.

2 miles
79 ft
10 miles
164 ft
50 miles
308 ft
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Lakeside 3.7 mi · Fruit Cove 5.0 mi · Oakleaf Plantation 8.7 mi · St. Johns 11 mi · Jacksonville 17 mi · Palm Valley 21 mi · Ponte Vedra Beach 22 mi · Jacksonville Beach 24 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 Fleming Island (30.0933°, -81.719°, elevation 20 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).