Randfontein weather in December

In December, Randfontein sees average daytime highs of 26°C and overnight lows near 15°C, with 141 mm of rain across 18.5 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°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 Randfontein's 12th-clearest and 5th-windiest month. For the whole year in context, see Randfontein's year-round climate.

Daytime high
26°
2nd warmest
Overnight low
15°
10th coldest
Rainfall
141 mm
18.5 wet days
Daylight
13 h 36 min
5:16 AM – 6:54 PM
Cloud cover
57%
12th clearest
Wind
11 km/h
5th windiest
Solar energy
6.88 kWh/m²
Travel score
5.6
out of 10

Randfontein is town.

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 26°C through the month.

A typical December day in Randfontein 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 22°C and 30°C. Set against its neighbours, December runs on par with November and on par with January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12515
22515
32515
42515
52515
62515
72515
82515
92515
102615
112615
122615
132615
142615
152615
162615
172615
182616
192616
202616
212616
222616
232616
242616
252616
262616
272616
282616
292616
302616
312616

Randfontein weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 16°13216.913.55.8
Feb26° / 16°11714.212.96.1
Mar24° / 14°9012.812.26.7
Apr22° / 11°457.411.47.4
May20° / 183.110.78.1
Jun18° / 81.410.47.9
Jul18° / 30.810.58.0
Aug21° / 101.911.18.5
Sep24° / 10°213.411.88.6
Oct25° / 13°7310.412.67.1
Nov26° / 14°9913.913.36.2
Dec26° / 15°14118.513.65.6

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 26% of December, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25446
35446
45446
55446
65446
75545
85545
95545
105545
115644
125545
135644
145644
155743
165644
175644
185644
195644
205644
215644
225545
235644
245545
255545
265545
275644
285743
295743
305743
315941

Chance of precipitation in December

Any precipitation

Randfontein gets around 141 mm of rain over 18.5 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 59% and peaks near 61% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
154
255
356
457
558
659
759
860
960
1060
1161
1261
1360
1460
1560
1659
1759
1859
1959
2059
2159
2259
2359
2459
2559
2659
2758
2858
2957
3057
3156

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 52% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
149447
248457
346467
445488
543498
642508
741518
840519
938539
1037549
11365410
12345610
13335611
14325612
15315712
16305713
17295714
18285715
19285517
20275518
21265519
22255421
23255322
24245224
25245125
26235126
27235027
28235028
29234928
30224929
31224829

Wind in December

Winds average 11 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
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
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 5:13 AM to 5:24 AM, and sunset from 6:45 PM to 7:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:136:45
213.55:136:45
313.55:136:46
413.65:146:47
513.65:146:47
613.65:146:48
713.65:146:49
813.65:146:49
913.65:146:50
1013.65:156:51
1113.65:156:51
1213.65:156:52
1313.65:156:53
1413.65:166:53
1513.65:166:54
1613.65:166:54
1713.65:176:55
1813.65:176:55
1913.65:186:56
2013.65:186:56
2113.65:186:57
2213.65:196:57
2313.65:196:58
2413.65:206:58
2513.65:206:59
2613.65:216:59
2713.65:217:00
2813.65:227:00
2913.65:237:00
3013.65:237:01
3113.65:247:01

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.88 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.91 kWh/m² to a high of 6.88 kWh/m² in December across the year — December's 6.88 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.8Intense
46.8Intense
56.8Intense
66.8Intense
76.8Intense
86.8Intense
96.8Intense
106.9Intense
116.9Intense
126.9Intense
136.9Intense
146.9Intense
156.9Intense
167.0Intense
177.0Intense
187.0Intense
197.0Intense
207.0Intense
217.0Intense
227.0Intense
236.9Intense
246.9Intense
256.9Intense
266.9Intense
276.9Intense
286.9Intense
296.9Intense
306.9Intense
316.9Intense
Planning a trip in December

Hazard calendar for Randfontein

In seasonPeak

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

Randfontein'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 Randfontein?

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

5.6
Sightseeing
12th-best month of the year
5.3
Beach & pool
8th-best month of the year

December is a reasonable time to visit Randfontein for sightseeing.

What to pack for Randfontein in December

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

In December, Randfontein sees daytime highs around 26°C and nights near 15°C. Pack rain gear and sun protection. Worth having: light clothes. About 19 days see rain.

rain gearsun protectionlight clothes

UV index in Randfontein 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 Randfontein peaks around January 11 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 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 11UV 14Jun 19UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar12Extreme
Apr9Very high
May6High
Jun5High
Jul6High
Aug7Very high
Sep9Very high
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in Randfontein 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 Randfontein is worst in June — around 283 µg/m³ PM2.5 (very unhealthy), about 5.7× the cleanest month (January, 50 µg/m³).

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

0306090120150180210240270300JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyVery unhealthyUnhealthyJun 19282 µg/m³Jan 1251 µg/m³
PM2.5 (µg/m³)Level
Jan50Poor
Feb72Unhealthy
Mar119Unhealthy
Apr177Very unhealthy
May261Very unhealthy
Jun283Very unhealthy
Jul275Very unhealthy
Aug213Very unhealthy
Sep156Very unhealthy
Oct99Unhealthy
Nov70Unhealthy
Dec55Poor
Location & terrain

Where is Randfontein?

Randfontein sits at 26.2°S, 27.7°E, 1,716 m above sea level, in South Africa. The nearest listed city is Krugersdorp, 13 km away.

Topography around Randfontein

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

Within 3 km, the terrain around Randfontein has only modest variations in elevation — a maximum elevation change of 105 m around an average of 1,705 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 364 m; within 80 km, large variations in elevation — a maximum elevation change of 900 m.

The land around Randfontein is covered by grassland (46%) and artificial surfaces (40%) within 3 km, grassland (57%) within 16 km, and grassland (56%) within 80 km.

3 km
105 m
16 km
364 m
80 km
900 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
December weather nearby: Krugersdorp 13 km · Bagale 14 km · Westonaria 16 km · Roodepoort 17 km · Soweto 18 km · Randburg 32 km · Johannesburg 34 km · Carletonville 36 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 Randfontein (-26.1844°, 27.702°, elevation 1,716 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).