Iona weather in December

In December, Iona sees average daytime highs of 73°F and overnight lows near 62°F, with 1.4 in of rain across 4.3 wet days and about 10.4 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 75°F in the first days to 72°F by the end. The sky is clear or mostly clear about 49% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 30 min at the start of December to 10 h 24 min by month's end. Set against the rest of the year, December is Iona's 6th-clearest and 5th-windiest month. For the whole year in context, see Iona's year-round climate.

Daytime high
73°
10th warmest
Overnight low
62°
3rd coldest
Rainfall
1.4 in
4.3 wet days
Daylight
10 h 18 min
7:14 AM – 5:34 PM
Cloud cover
45%
6th clearest
Wind
9 mph
5th windiest
Solar energy
3.44 kWh/m²
Travel score
7.9
out of 10

Iona is census-designated place in Lee County, Florida, United States.

Density
580/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 75°F in the first days to 72°F by the end.

A typical December day in Iona reaches about 73°F in the afternoon and slips back to 62°F overnight — a 11°F spread between the day's warmth and the night's chill. On most days the high lands between 65°F and 79°F. Set against its neighbours, December runs about 4°F cooler than November and about 3°F warmer than January.

40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
17564
27564
37564
47564
57464
67463
77463
87463
97463
107463
117463
127363
137363
147362
157362
167362
177362
187362
197362
207262
217262
227261
237261
247261
257261
267261
277261
287261
297261
307161
317161

How December really feels in Iona

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.

Iona weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan70° / 59°1.84.910.57.5
Feb72° / 61°1.44.411.17.8
Mar75° / 64°1.64.811.88.1
Apr79° / 69°1.75.812.67.7
May83° / 74°2.48.313.36.4
Jun85° / 78°5.618.213.64.2
Jul86° / 79°4.92013.53.8
Aug86° / 79°5.220.812.93.6
Sep85° / 78°5.618.212.24.1
Oct82° / 73°2.88.511.46.4
Nov77° / 67°1.33.710.78.1
Dec73° / 62°1.44.310.47.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 36%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17327
27426
37327
47327
57228
67129
77129
86931
96931
106832
116733
126634
136535
146436
156337
166238
176139
186139
196040
206040
215941
225941
235941
245842
255842
265842
275743
285743
295842
305842
315842

Chance of precipitation in December

Any precipitation

Iona gets around 1.4 in of rain over 4.3 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 14% and peaks near 15% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
112
212
313
413
513
613
713
814
914
1014
1115
1215
1315
1415
1515
1615
1715
1815
1915
2015
2115
2215
2315
2415
2515
2615
2715
2815
2915
3015
3114

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 29% of days. Sticky, muggy-or-worse air turns up on roughly 33% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1211825278
2221825288
3221824288
4231724297
5231723297
6241723297
7241623307
8251622307
9251622307
10261522307
11261522307
12271522297
13281522296
14291522296
15291522286
16301522286
17311522276
18311522276
19321522265
20331522265
21331522255
22331522255
23331522255
24331522255
25331522255
26331522255
27331422265
28331422265
29331422265
30341322265
31341322265

Wind in December

Winds average 9 mph in December.

Across December, daily wind ranges from about 9 mph on the calmest days to 10 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
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze
3110light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 30 min at the start of December to 10 h 24 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 7:04 AM to 7:20 AM, and sunset from 5:31 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.57:045:31
210.47:055:31
310.47:055:31
410.47:065:31
510.47:075:32
610.47:075:32
710.47:085:32
810.47:095:32
910.47:095:32
1010.47:105:33
1110.47:115:33
1210.47:115:33
1310.47:125:33
1410.47:135:34
1510.37:135:34
1610.37:145:34
1710.37:145:35
1810.37:155:35
1910.37:155:36
2010.37:165:36
2110.37:165:36
2210.37:175:37
2310.37:175:37
2410.37:185:38
2510.37:185:38
2610.37:195:39
2710.37:195:39
2810.37:195:40
2910.37:205:41
3010.47:205:41
3110.47:205:42

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.44 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.44 kWh/m² to a high of 6.71 kWh/m² in May across the year — December's 3.44 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.6Moderate
43.6Moderate
53.6Moderate
63.5Moderate
73.5Moderate
83.5Moderate
93.5Moderate
103.5Moderate
113.5Moderate
123.5Moderate
133.4Moderate
143.4Moderate
153.4Moderate
163.4Moderate
173.4Moderate
183.4Moderate
193.4Moderate
203.4Moderate
213.4Moderate
223.4Moderate
233.4Moderate
243.4Moderate
253.4Moderate
263.4Moderate
273.4Moderate
283.4Moderate
293.4Moderate
303.4Moderate
313.5Moderate
Planning a trip in December

Hazard calendar for Iona

In seasonPeak

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

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

Iona's rainy season runs June–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 Iona?

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

7.9
Sightseeing
3rd-best month of the year
6.0
Beach & pool
6th-best month of the year

December is one of the better times to visit Iona for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Iona in December

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

In December, Iona sees daytime highs around 73°F and nights near 62°F. Worth packing: light clothes. About 4 days see rain.

light clothes

Sea temperature near Iona in December

The nearest coast averages about 71°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 11 mi away) is warmest in August at about 86°F and coldest in January near 68°F.

It's comfortable for a long swim from Feb 11 to Jan 16 — about 11.2 months when the water holds above 68°F.

70°80°90°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan68Cool
Feb68Refreshing
Mar71Refreshing
Apr76Warm
May80Warm
Jun84Tropical
Jul86Tropical
Aug86Tropical
Sep85Tropical
Oct81Warm
Nov75Warm
Dec71Refreshing

UV index in Iona in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Iona peaks around July 17 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighModerateJul 17UV 11Dec 17UV 5
UV index (midday)Level
Jan5High
Feb7Very high
Mar9Very high
Apr10Very high
May10Very high
Jun10Extreme
Jul12Extreme
Aug10Extreme
Sep10Very high
Oct8Very high
Nov6High
Dec5Moderate

Air quality in Iona 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 Iona is worst in July — around 20 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1819 µg/m³Dec 147 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar12Good
Apr10Good
May11Good
Jun15Moderate
Jul20Moderate
Aug17Moderate
Sep12Moderate
Oct9Good
Nov8Good
Dec7Good
Location & terrain

Where is Iona?

Iona sits at 26.5°N, 82.0°W, 7 ft above sea level, in United States. The nearest listed city is Cape Coral, 3.1 mi away.

Topography around Iona

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

Within 2 miles, the terrain around Iona has only modest variations in elevation — a maximum elevation change of 39 ft around an average of 7 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 89 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 164 ft.

The land around Iona is covered by water (42%) and artificial surfaces (28%) within 2 miles, water (41%) and artificial surfaces (23%) within 10 miles, and water (37%), trees (30%) and grassland (20%) within 50 miles.

2 miles
39 ft
10 miles
89 ft
50 miles
164 ft
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
December weather nearby: Cape Coral 3.1 mi · Fort Myers 11 mi · San Carlos Park 11 mi · Estero 11 mi · North Fort Myers 11 mi · Bonita Springs 17 mi · Lehigh Acres 22 mi · Naples 28 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 Iona (26.5204°, -81.964°, elevation 7 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).