Randfontein weather in January

In January, Randfontein sees average daytime highs of 26°C and overnight lows near 16°C, with 132 mm of rain across 16.9 wet days and about 13.5 hours of daylight. It is the 1st-warmest and 2nd-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 35% of the time in January, and the air most often feels comfortable.

Daylight stretches from about 13 h 36 min at the start of January to 13 h 12 min by month's end. Set against the rest of the year, January is Randfontein's 11th-clearest and 8th-windiest month. For the whole year in context, see Randfontein's year-round climate.

Daytime high
26°
1st warmest
Overnight low
16°
12th coldest
Rainfall
132 mm
16.9 wet days
Daylight
13 h 30 min
5:34 AM – 7:03 PM
Cloud cover
54%
11th clearest
Wind
10 km/h
8th windiest
Solar energy
6.68 kWh/m²
Travel score
5.8
out of 10

Randfontein is town.

Founded
1890

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical January day in Randfontein reaches about 26°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 22°C and 29°C. Set against its neighbours, January runs on par with December and on par with February.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12616
22616
32616
42616
52616
62616
72616
82616
92616
102616
112616
122616
132616
142616
152616
162616
172616
182616
192616
202616
212616
222616
232616
242616
252616
262616
272616
282616
292616
302616
312616

Randfontein weather by month

How January compares with the rest of the year at a glance. January is the 1st-warmest and 2nd-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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 24% of January, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
25941
35941
45941
55941
65941
75941
85941
95941
105842
115941
125842
135842
145842
155842
165842
175842
185842
195842
205842
215842
225842
235941
245941
256040
266040
276040
286040
296139
306238
316139

Chance of precipitation in January

Any precipitation

Randfontein gets around 132 mm of rain over 16.9 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 55% and peaks near 56% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
156
255
355
454
554
654
753
853
953
1053
1153
1253
1354
1454
1554
1655
1755
1855
1955
2056
2156
2256
2356
2456
2556
2656
2755
2855
2954
3054
3153

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the comfortable band about 47% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
1224829
2224829
3224829
4224829
5224829
6224929
7224929
8224929
9224930
10224830
11214830
12214831
13214832
14204732
15204733
16204634
17194634
18194635
19184636
20184636
21184637
22174637
23174637
24174637
25174637
26174637
27174736
28174736
29174735
30174834
31184834

Wind in January

Winds average 10 km/h in January.

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

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 13 h 36 min at the start of January to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over January. Sunrise moves from 5:24 AM to 5:46 AM, and sunset from 7:01 PM to 7:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:247:01
213.65:257:01
313.65:257:01
413.65:267:02
513.65:267:02
613.65:277:02
713.65:287:02
813.65:297:02
913.65:297:02
1013.55:307:03
1113.55:317:03
1213.55:317:03
1313.55:327:03
1413.55:337:03
1513.55:347:03
1613.55:347:03
1713.55:357:03
1813.45:367:03
1913.45:367:02
2013.45:377:02
2113.45:387:02
2213.45:397:02
2313.45:407:02
2413.45:407:02
2513.35:417:01
2613.35:427:01
2713.35:437:01
2813.35:437:01
2913.35:447:00
3013.35:457:00
3113.25:467:00

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 6.68 kWh/m².

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 — January's 6.68 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.9Intense
26.9Intense
36.9Intense
46.9Intense
56.8Intense
66.8Intense
76.8Intense
86.8Intense
96.8Intense
106.8Intense
116.8Intense
126.7Intense
136.7Intense
146.7Intense
156.7Intense
166.7Intense
176.6Intense
186.6Intense
196.6Intense
206.6Intense
216.6Intense
226.5Intense
236.5Intense
246.5Intense
256.5Intense
266.5Intense
276.5Intense
286.5Intense
296.5Intense
306.5Intense
316.5Intense
Planning a trip in January

Hazard calendar for Randfontein

In seasonPeak

In January, 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 January a good time to visit Randfontein?

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

5.8
Sightseeing
11th-best month of the year
5.5
Beach & pool
6th-best month of the year

January is a reasonable time to visit Randfontein for sightseeing.

What to pack for Randfontein in January

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

In January, Randfontein sees daytime highs around 26°C and nights near 16°C. Pack rain gear and sun protection. Worth having: light clothes. About 17 days see rain.

rain gearsun protectionlight clothes

UV index in Randfontein in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January 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
January 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).