Coronado weather in December

In December, Coronado sees average daytime highs of 62°F and overnight lows near 53°F, with 1.6 in of rain across 4.9 wet days and about 9.9 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 62°F through the month. The sky is clear or mostly clear about 52% 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 Coronado's 9th-clearest and 9th-windiest month. For the whole year in context, see Coronado's year-round climate.

Daytime high
62°
10th warmest
Overnight low
53°
3rd coldest
Rainfall
1.6 in
4.9 wet days
Daylight
9 h 54 min
6:49 AM – 4:41 PM
Cloud cover
41%
9th clearest
Wind
6 mph
9th windiest
Solar energy
3.12 kWh/m²
Travel score
6.4
out of 10

Coronado is city in San Diego County, California, United States.

Density
293/km²
people per km²
Founded
1890

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 62°F through the month.

A typical December day in Coronado reaches about 62°F in the afternoon and slips back to 53°F overnight — a 10°F spread between the day's warmth and the night's chill. On most days the high lands between 58°F and 68°F. Set against its neighbours, December runs about 4°F cooler than November and on par with January.

40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
16454
26454
36454
46454
56354
66354
76353
86353
96353
106353
116353
126253
136253
146253
156253
166253
176252
186252
196252
206252
216252
226252
236252
246252
256252
266252
276252
286252
296252
306252
316252

Coronado weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan62° / 52°2.05.510.16.1
Feb62° / 53°2.56.210.85.9
Mar63° / 54°1.55.211.86.3
Apr64° / 56°0.62.912.87.2
May66° / 58°0.31.613.77.7
Jun69° / 61°0.00.214.18.4
Jul72° / 64°0.10.313.99.0
Aug74° / 66°0.00.113.29.4
Sep74° / 65°0.10.612.29.2
Oct71° / 62°0.5211.28.4
Nov67° / 57°0.72.910.37.6
Dec62° / 53°1.64.99.96.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 36%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16634
26634
36634
46535
56535
66535
76535
86535
96436
106436
116436
126436
136436
146436
156436
166436
176436
186436
196436
206436
216436
226535
236535
246436
256436
266436
276337
286337
296337
306238
316238

Chance of precipitation in December

Any precipitation

Coronado gets around 1.6 in of rain over 4.9 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 16% and peaks near 18% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
113
214
314
414
515
615
715
815
916
1016
1116
1216
1316
1416
1516
1616
1716
1816
1916
2016
2116
2216
2316
2416
2516
2617
2717
2817
2917
3018
3118

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 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
18515
28614
38614
48713
58713
68713
78812
88812
98911
108911
119010
12919
13919
14928
15937
16946
17946
18955
19955
20964
21964
22973
23973
24973
25973
26973
27973
28973
29973
30973
31964

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 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 6:38 AM to 6:56 AM, and sunset from 4:39 PM to 4:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.06:384:39
210.06:394:39
310.06:404:39
410.06:414:39
510.06:424:39
69.96:424:39
79.96:434:39
89.96:444:39
99.96:454:39
109.96:454:39
119.96:464:39
129.96:474:40
139.96:474:40
149.96:484:40
159.96:494:40
169.96:494:41
179.96:504:41
189.96:504:41
199.86:514:42
209.86:514:42
219.86:524:43
229.86:524:43
239.86:534:44
249.86:534:44
259.86:544:45
269.96:544:45
279.96:544:46
289.96:554:46
299.96:554:47
309.96:554:48
319.96:564:48

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.12 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.12 kWh/m² to a high of 7.89 kWh/m² in June across the year — December's 3.12 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.2Moderate
33.2Moderate
43.2Moderate
53.1Moderate
63.1Moderate
73.1Moderate
83.1Moderate
93.1Moderate
103.1Moderate
113.0Moderate
123.0Moderate
133.0Moderate
143.0Moderate
153.0Moderate
163.0Moderate
173.0Moderate
183.0Moderate
193.0Moderate
203.0Moderate
213.1Moderate
223.1Moderate
233.1Moderate
243.1Moderate
253.1Moderate
263.1Moderate
273.1Moderate
283.1Moderate
293.2Moderate
303.2Moderate
313.2Moderate
Planning a trip in December

Is December a good time to visit Coronado?

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

6.4
Sightseeing
9th-best month of the year
1.5
Beach & pool
9th-best month of the year

December is a reasonable time to visit Coronado for sightseeing.

What to pack for Coronado in December

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

In December, Coronado sees daytime highs around 62°F and nights near 53°F. Worth packing: a warm layer. About 5 days see rain.

a warm layer

Sea temperature near Coronado in December

The nearest coast averages about 61°F in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 70°F and coldest in February near 59°F.

It's comfortable for a long swim from Jul 13 to Sep 28 — about 2.6 months when the water holds above 68°F.

60°65°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°F)Comfort
Jan60Cool
Feb59Cool
Mar60Cool
Apr61Cool
May63Cool
Jun65Cool
Jul68Refreshing
Aug70Refreshing
Sep69Refreshing
Oct67Cool
Nov64Cool
Dec61Cool

UV index in Coronado 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 Coronado peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 highExtremeVery highHighModerateJun 23UV 11Dec 17UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Coronado 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 Coronado is worst in September — around 26 µg/m³ PM2.5 (moderate), about 3.4× the cleanest month (May, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateSep 1625 µg/m³May 168 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb12Moderate
Mar12Moderate
Apr11Good
May8Good
Jun11Good
Jul11Good
Aug15Moderate
Sep26Moderate
Oct14Moderate
Nov12Moderate
Dec16Moderate
Location & terrain

Where is Coronado?

Coronado sits at 32.7°N, 117.2°W, 16 ft above sea level, in United States. The nearest listed city is San Diego, 2.5 mi away.

Topography around Coronado

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

Within 2 miles, the terrain around Coronado has only modest variations in elevation — a maximum elevation change of 95 ft around an average of 10 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 722 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,450 ft.

The land around Coronado is covered by water (56%) and artificial surfaces (31%) within 2 miles, water (51%) and artificial surfaces (37%) within 10 miles, and water (36%) and shrubs (22%) within 50 miles.

2 miles
95 ft
10 miles
722 ft
50 miles
6,450 ft
treesshrubsgrasslandartificial surfacesbare terrainwater
December weather nearby: San Diego 2.5 mi · National City 5.0 mi · Chula Vista 6.8 mi · Imperial Beach 8.1 mi · Lemon Grove 9.9 mi · La Mesa 11 mi · La Presa 11 mi · Spring Valley 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 Coronado (32.6859°, -117.1831°, elevation 16 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. 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).