Caledon weather in December

In December, Caledon sees average daytime highs of 26°C and overnight lows near 15°C, with 23 mm of rain across 5.3 wet days and about 14.2 hours of daylight. It is the 3rd-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 25°C in the first days to 26°C by the end. The sky is clear or mostly clear about 51% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 06 min at the start of December to 14 h 18 min by month's end. Set against the rest of the year, December is Caledon's 4th-clearest and 1st-windiest month. For the whole year in context, see Caledon's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
15°
9th coldest
Rainfall
23 mm
5.3 wet days
Daylight
14 h 18 min
5:30 AM – 7:47 PM
Cloud cover
41%
4th clearest
Wind
13 km/h
1st windiest
Solar energy
7.68 kWh/m²
Travel score
7.8
out of 10

Caledon is town in the Western Cape, South Africa.

Density
928/km²
people per km²
Founded
1811

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 25°C in the first days to 26°C by the end.

A typical December day in Caledon reaches about 26°C in the afternoon and slips back to 15°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 30°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12514
22514
32514
42515
52515
62515
72515
82515
92515
102615
112615
122615
132615
142615
152615
162615
172615
182615
192616
202616
212616
222616
232616
242616
252616
262616
272616
282616
292616
302616
312616

Caledon weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 16°255147.8
Feb27° / 17°225.513.37.6
Mar26° / 15°28612.37.7
Apr23° / 13°386.211.27.6
May20° / 10°386.210.27.0
Jun17° / 568.69.85.9
Jul17° / 5889.95.7
Aug17° / 518.910.75.8
Sep19° / 357.211.86.5
Oct21° / 11°386.712.97.2
Nov23° / 13°385.813.87.7
Dec26° / 15°235.314.27.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 18% of December, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16832
26832
36832
46832
56832
66733
76832
86733
96733
106733
116733
126733
136733
146832
156832
166832
176733
186832
196832
206832
216931
226931
236931
246931
257129
267129
277228
287228
297327
307228
317228

Chance of precipitation in December

Any precipitation

Caledon gets around 23 mm of rain over 5.3 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 17% and peaks near 19% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
117
217
317
417
517
617
716
816
916
1016
1117
1217
1317
1417
1517
1618
1718
1818
1918
2019
2119
2219
2318
2418
2518
2618
2718
2818
2918
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 49% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1662950
2643150
3633250
4613360
5593560
6573670
7573670
8553780
9543880
10533890
11523990
125139100
135139100
145040110
154940110
164840120
174840120
184740130
194740130
204640140
214640140
224540150
234441150
244341160
254241160
264142170
274042180
283942180
293843190
303743191
313743201

Wind in December

Winds average 13 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 06 min at the start of December to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over December. Sunrise moves from 5:28 AM to 5:38 AM, and sunset from 7:36 PM to 7:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:287:36
214.15:287:36
314.15:287:37
414.25:287:38
514.25:287:39
614.25:287:40
714.25:287:40
814.25:297:41
914.25:297:42
1014.25:297:43
1114.25:297:43
1214.25:297:44
1314.35:297:45
1414.35:307:45
1514.35:307:46
1614.35:307:47
1714.35:317:47
1814.35:317:48
1914.35:317:48
2014.35:327:49
2114.35:327:49
2214.35:337:50
2314.35:337:50
2414.35:347:51
2514.35:347:51
2614.35:357:52
2714.35:357:52
2814.35:367:52
2914.35:367:53
3014.35:377:53
3114.35:387:53

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.68 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 7.68 kWh/m² in December across the year — December's 7.68 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.6Intense
27.6Intense
37.6Intense
47.6Intense
57.7Intense
67.7Intense
77.7Intense
87.7Intense
97.7Intense
107.7Intense
117.7Intense
127.7Intense
137.7Intense
147.7Intense
157.7Intense
167.7Intense
177.7Intense
187.7Intense
197.7Intense
207.7Intense
217.7Intense
227.7Intense
237.7Intense
247.7Intense
257.7Intense
267.7Intense
277.7Intense
287.7Intense
297.7Intense
307.7Intense
317.7Intense
Planning a trip in December

Is December a good time to visit Caledon?

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

7.8
Sightseeing
1st-best month of the year
7.3
Beach & pool
3rd-best month of the year

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

What to pack for Caledon in December

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

In December, Caledon sees daytime highs around 26°C and nights near 15°C. Pack sun protection. Worth having: light clothes. About 5 days see rain.

sun protectionlight clothes

Sea temperature near Caledon in December

The nearest coast averages about 19°C 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 17 km away) is warmest in January at about 19°C and coldest in July near 15°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

14°16°18°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan19Cool
Feb19Cool
Mar17Cool
Apr16Cool
May16Cool
Jun16Cool
Jul15Bracing
Aug15Bracing
Sep15Cool
Oct16Cool
Nov17Cool
Dec19Cool

UV index in Caledon in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Caledon peaks around January 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 13UV 13Jun 20UV 3
UV index (midday)Level
Jan13Extreme
Feb10Very high
Mar9Very high
Apr6High
May3Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct10Extreme
Nov11Extreme
Dec12Extreme

Air quality in Caledon 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 Caledon is worst in June — around 18 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodJun 1718 µg/m³Nov 177 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb8Good
Mar12Moderate
Apr11Good
May16Moderate
Jun18Moderate
Jul16Moderate
Aug15Moderate
Sep13Moderate
Oct9Good
Nov7Good
Dec8Good
Location & terrain

Where is Caledon?

Caledon sits at 34.2°S, 19.4°E, 260 m above sea level, in South Africa. The nearest listed city is Hermanus, 27 km away.

Topography around Caledon

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Caledon.

Within 3 km, the terrain around Caledon has significant variations in elevation — a maximum elevation change of 486 m around an average of 292 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,037 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,046 m.

The land around Caledon is covered by cropland (44%) within 3 km, cropland (53%) and grassland (32%) within 16 km, and grassland (31%) and water (25%) within 80 km.

3 km
486 m
16 km
1,037 m
80 km
2,046 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Hermanus 27 km · Grabouw 39 km · Gansbaai 40 km · Franschhoek 45 km · Le Roux 48 km · Somerset West 58 km · Stellenbosch 61 km · Robertson 64 km

South Africa travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / M / N
230 V · 50 Hz
Prices
≈ 41% of US
price level, 2025
GDP per capita
$6,598
2025
Happiness
5.0 / 10
World Happiness, 2025
Safe drinking water
68%
of population, 2024
Homicide rate
43.7
per 100k, 2022
Road deaths
22.2
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very high
EF EPI 602
Religion
Christian 86%or other traditional African religions 5%nothing in particular 5%Muslim 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 Caledon (-34.23°, 19.4265°, elevation 260 m), 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).