Sasolburg weather in December

In December, Sasolburg sees average daytime highs of 27°C and overnight lows near 16°C, with 137 mm of rain across 17 wet days and about 13.7 hours of daylight. It is the 1st-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 36% of the time in December, and the air most often feels comfortable.

Daylight stretches from about 13 h 36 min at the start of December to 13 h 42 min by month's end. Set against the rest of the year, December is Sasolburg's 12th-clearest and 5th-windiest month. For the whole year in context, see Sasolburg's year-round climate.

Daytime high
27°
1st warmest
Overnight low
16°
10th coldest
Rainfall
137 mm
17 wet days
Daylight
13 h 42 min
5:15 AM – 6:55 PM
Cloud cover
54%
12th clearest
Wind
12 km/h
5th windiest
Solar energy
6.97 kWh/m²
Travel score
5.6
out of 10

Sasolburg is town.

Density
79/km²
people per km²
Founded
1954

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 Sasolburg reaches about 27°C in the afternoon and slips back to 16°C overnight — a 11°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)
12715
22715
32715
42715
52715
62715
72715
82716
92716
102716
112716
122716
132716
142716
152716
162716
172716
182716
192716
202716
212716
222716
232716
242716
252716
262716
272716
282716
292716
302717
312717

Sasolburg weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 17°13216.113.55.8
Feb27° / 16°10412.912.96.1
Mar26° / 15°8611.612.26.8
Apr23° / 11°416.911.47.8
May21° / 183.110.78.3
Jun19° / 81.610.38.1
Jul19° / 40.810.58.3
Aug22° / 122.211.18.7
Sep25° / 11°203.611.88.4
Oct27° / 13°7710.412.66.9
Nov27° / 15°10413.113.36.2
Dec27° / 16°1371713.75.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% 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 39%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25743
35743
45842
55842
65842
75941
85941
96139
106139
116139
126238
136238
146238
156337
166337
176337
186436
196337
206337
216337
226139
236139
246139
256139
266139
276238
286238
296238
306238
316337

Chance of precipitation in December

Any precipitation

Sasolburg gets around 137 mm of rain over 17 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 54% and peaks near 56% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
152
253
354
455
556
656
756
856
956
1056
1156
1256
1355
1455
1554
1654
1753
1853
1953
2053
2153
2253
2354
2454
2554
2654
2754
2854
2953
3053
3153

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 50% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
152417
250437
348447
446468
545478
643498
742508
841518
940528
1039538
1138548
1237549
1336559
1436559
15355510
16345511
17345412
18335413
19325414
20325216
21315217
22305119
23295021
24285022
25274924
26264925
27264827
28254728
29254629
30244630
31244531

Wind in December

Winds average 12 km/h in December.

Across December, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 36 min at the start of December to 13 h 42 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 5:12 AM to 5:22 AM, and sunset from 6:45 PM to 7:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:126:45
213.65:126:46
313.65:126:47
413.65:126:48
513.65:126:48
613.65:126:49
713.65:126:50
813.65:126:50
913.65:136:51
1013.65:136:52
1113.75:136:52
1213.75:136:53
1313.75:146:53
1413.75:146:54
1513.75:146:55
1613.75:156:55
1713.75:156:56
1813.75:156:56
1913.75:166:57
2013.75:166:57
2113.75:176:58
2213.75:176:58
2313.75:186:59
2413.75:186:59
2513.75:197:00
2613.75:197:00
2713.75:207:00
2813.75:207:01
2913.75:217:01
3013.75:217:02
3113.75:227:02

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.97 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.86 kWh/m² to a high of 6.97 kWh/m² in December across the year — December's 6.97 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
16.9Intense
26.9Intense
36.9Intense
46.9Intense
56.9Intense
66.9Intense
76.9Intense
86.9Intense
97.0Intense
107.0Intense
117.0Intense
127.0Intense
137.0Intense
147.0Intense
157.0Intense
167.1Intense
177.1Intense
187.1Intense
197.1Intense
207.1Intense
217.0Intense
227.0Intense
237.0Intense
247.0Intense
257.0Intense
267.0Intense
277.0Intense
287.0Intense
297.0Intense
307.0Intense
317.0Intense
Planning a trip in December

Hazard calendar for Sasolburg

In seasonPeak

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

Sasolburg'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 Sasolburg?

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
5.8
Beach & pool
8th-best month of the year

December is a reasonable time to visit Sasolburg for sightseeing.

What to pack for Sasolburg in December

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

In December, Sasolburg sees daytime highs around 27°C and nights near 16°C. Pack light clothes, rain gear and sun protection. About 17 days see rain.

light clothesrain gearsun protection

UV index in Sasolburg 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 Sasolburg peaks around January 14 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 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 14UV 14Jun 20UV 5
UV index (midday)Level
Jan15Extreme
Feb13Extreme
Mar12Extreme
Apr8Very high
May6High
Jun5High
Jul5High
Aug7Very high
Sep9Very high
Oct10Very high
Nov12Extreme
Dec14Extreme

Air quality in Sasolburg 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 Sasolburg is worst in July — around 103 µg/m³ PM2.5 (unhealthy), about 4.4× the cleanest month (January, 24 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorModerateJul 11103 µg/m³Jan 1124 µg/m³
PM2.5 (µg/m³)Level
Jan24Moderate
Feb32Moderate
Mar48Poor
Apr64Unhealthy
May88Unhealthy
Jun100Unhealthy
Jul103Unhealthy
Aug83Unhealthy
Sep65Unhealthy
Oct44Poor
Nov31Moderate
Dec25Moderate
Location & terrain

Where is Sasolburg?

Sasolburg sits at 26.8°S, 27.8°E, 1,473 m above sea level, in South Africa. The nearest listed city is Vanderbijlpark, 12 km away.

Topography around Sasolburg

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

Within 3 km, the terrain around Sasolburg has only modest variations in elevation — a maximum elevation change of 84 m around an average of 1,467 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 147 m; within 80 km, large variations in elevation — a maximum elevation change of 611 m.

The land around Sasolburg is covered by grassland (44%) and artificial surfaces (27%) within 3 km, grassland (42%) and cropland (42%) within 16 km, and grassland (54%) and cropland (34%) within 80 km.

3 km
84 m
16 km
147 m
80 km
611 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Vanderbijlpark 12 km · Vereeniging 19 km · Deneysville 29 km · Evaton 31 km · Parys 37 km · Fochville 48 km · Vredefort 50 km · Koppies 53 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 Sasolburg (-26.8136°, 27.8169°, elevation 1,473 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).