Cullinan weather in December

In December, Cullinan sees average daytime highs of 27°C and overnight lows near 16°C, with 121 mm of rain across 16.2 wet days and about 13.6 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 29% of the time in December, and the air most often feels comfortable.

Daylight stretches from about 13 h 30 min at the start of December to 13 h 36 min by month's end. Set against the rest of the year, December is Cullinan's 12th-clearest and 5th-windiest month. For the whole year in context, see Cullinan's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
16°
10th coldest
Rainfall
121 mm
16.2 wet days
Daylight
13 h 36 min
5:14 AM – 6:50 PM
Cloud cover
58%
12th clearest
Wind
10 km/h
5th windiest
Solar energy
6.64 kWh/m²
Travel score
5.7
out of 10

Cullinan is town in South Africa.

Founded
1903

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 27°C through the month.

A typical December day in Cullinan reaches about 27°C in the afternoon and slips back to 16°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 31°C. Set against its neighbours, December runs on par with November and on par with January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12616
22616
32616
42616
52616
62616
72616
82616
92616
102716
112716
122716
132716
142716
152716
162717
172717
182717
192717
202717
212717
222717
232717
242717
252717
262717
272717
282717
292717
302717
312717

Cullinan weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 17°11214.713.45.9
Feb27° / 17°9711.912.96.2
Mar26° / 16°8910.912.26.8
Apr24° / 12°406.411.47.8
May22° / 152.410.88.6
Jun20° / 71.110.48.4
Jul19° / 40.810.68.5
Aug22° / 81.711.18.9
Sep26° / 12°18311.88.5
Oct27° / 14°709.512.67.0
Nov27° / 15°9712.913.36.2
Dec27° / 16°12116.213.65.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 25% of December, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25248
35248
45149
55248
65248
75248
85347
95347
105446
115446
125446
135446
145446
155446
165545
175545
185545
195545
205446
215446
225446
235347
245446
255446
265446
275446
285644
295644
305644
315743

Chance of precipitation in December

Any precipitation

Cullinan gets around 121 mm of rain over 16.2 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 51% and peaks near 54% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
149
250
351
452
552
653
753
854
954
1053
1153
1253
1352
1452
1551
1651
1750
1850
1950
2050
2150
2250
2350
2451
2551
2651
2751
2851
2951
3051
3150

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the comfortable band about 53% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13649150
23550150
33352150
43252160
53153160
62954170
72854180
82655190
92556190
102456200
112257210
122157220
132057230
141957240
151858240
161758250
171757260
181657270
191557280
201555300
211455310
221453330
231452340
241351351
251349361
261448371
271447381
281446391
291545401
301644401
311643401

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 30 min at the start of December to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 5:11 AM to 5:22 AM, and sunset from 6:40 PM to 6:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:116:40
213.55:116:41
313.55:116:42
413.55:116:42
513.55:116:43
613.55:126:44
713.55:126:44
813.65:126:45
913.65:126:46
1013.65:126:46
1113.65:136:47
1213.65:136:48
1313.65:136:48
1413.65:146:49
1513.65:146:49
1613.65:146:50
1713.65:156:50
1813.65:156:51
1913.65:156:52
2013.65:166:52
2113.65:166:53
2213.65:176:53
2313.65:176:53
2413.65:186:54
2513.65:186:54
2613.65:196:55
2713.65:196:55
2813.65:206:56
2913.65:206:56
3013.65:216:56
3113.65:226:57

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.64 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.94 kWh/m² to a high of 6.64 kWh/m² in December across the year — December's 6.64 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.6Intense
116.6Intense
126.6Intense
136.6Intense
146.7Intense
156.7Intense
166.7Intense
176.7Intense
186.7Intense
196.7Intense
206.7Intense
216.7Intense
226.8Intense
236.8Intense
246.8Intense
256.8Intense
266.8Intense
276.8Intense
286.8Intense
296.8Intense
306.8Intense
316.7Intense
Planning a trip in December

Hazard calendar for Cullinan

In seasonPeak

In December, Cullinan sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Cullinan's rainy season runs October–March, when most of the year's rain falls.

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

Is December a good time to visit Cullinan?

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

5.7
Sightseeing
12th-best month of the year
5.8
Beach & pool
9th-best month of the year

December is a reasonable time to visit Cullinan for sightseeing.

What to pack for Cullinan in December

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

In December, Cullinan sees daytime highs around 27°C and nights near 16°C. Pack rain gear and sun protection. Worth having: light clothes. About 16 days see rain.

rain gearsun protectionlight clothes

UV index in Cullinan in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cullinan peaks around January 1 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 1UV 14Jun 17UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar12Extreme
Apr8Very high
May6High
Jun5High
Jul6High
Aug7Very high
Sep9Very high
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in Cullinan 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 Cullinan is worst in July — around 188 µg/m³ PM2.5 (very unhealthy), about 6.6× the cleanest month (January, 29 µg/m³).

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

0306090120150180210JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyVery unhealthyUnhealthyPoorJul 10187 µg/m³Jan 1229 µg/m³
PM2.5 (µg/m³)Level
Jan29Moderate
Feb43Poor
Mar67Unhealthy
Apr114Unhealthy
May169Very unhealthy
Jun185Very unhealthy
Jul188Very unhealthy
Aug142Unhealthy
Sep108Unhealthy
Oct62Unhealthy
Nov43Poor
Dec32Moderate
Location & terrain

Where is Cullinan?

Cullinan sits at 25.7°S, 28.5°E, 1,449 m above sea level, in South Africa. The nearest listed city is Ekangala, 21 km away.

Topography around Cullinan

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

Within 3 km, the terrain around Cullinan has only modest variations in elevation — a maximum elevation change of 184 m around an average of 1,438 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 418 m; within 80 km, large variations in elevation — a maximum elevation change of 909 m.

The land around Cullinan is covered by grassland (46%) within 3 km, grassland (61%) within 16 km, and grassland (49%) within 80 km.

3 km
184 m
16 km
418 m
80 km
909 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Ekangala 21 km · Moloto South 26 km · Bronkhorstspruit 27 km · Pretoria 35 km · Hammanskraal 38 km · Centurion 40 km · Midstream 43 km · Thembisa 47 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 Cullinan (-25.6709°, 28.5236°, elevation 1,449 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. 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).