Greytown weather in December

In December, Greytown sees average daytime highs of 27°C and overnight lows near 16°C, with 107 mm of rain across 17.1 wet days and about 13.8 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 28°C by the end. The sky is clear or mostly clear about 16% of the time in December, and the air most often feels comfortable.

Daylight stretches from about 13 h 42 min at the start of December to 13 h 48 min by month's end. Set against the rest of the year, December is Greytown's 12th-clearest and 4th-windiest month. For the whole year in context, see Greytown's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
16°
10th coldest
Rainfall
107 mm
17.1 wet days
Daylight
13 h 48 min
4:58 AM – 6:49 PM
Cloud cover
69%
12th clearest
Wind
8 km/h
4th windiest
Solar energy
5.9 kWh/m²
Travel score
5.4
out of 10

Greytown is town in South Africa.

Founded
1854

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 26°C in the first days to 28°C by the end.

A typical December day in Greytown 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 20°C and 33°C. Set against its neighbours, December runs about 1°C warmer than November and about 1°C cooler than January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12615
22615
32615
42615
52615
62615
72615
82615
92615
102615
112615
122615
132715
142715
152716
162716
172716
182716
192716
202716
212716
222716
232716
242816
252816
262816
272816
282816
292816
302816
312816

Greytown 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
Jan28° / 17°10616.613.65.4
Feb28° / 17°9113.8135.7
Mar27° / 16°7512.212.26.4
Apr24° / 13°447.811.37.5
May23° / 193.710.68.3
Jun20° / 132.510.28.2
Jul20° / 182.410.38.2
Aug22° / 224.3118.2
Sep25° / 11°336.111.87.8
Oct25° / 12°691212.76.5
Nov26° / 14°9415.213.55.7
Dec27° / 16°10717.113.85.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of December, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13664
23565
33565
43664
53565
63466
73466
83466
93466
103466
113565
123664
133565
143664
153763
163763
173763
183862
193961
203961
213862
223961
233961
243862
253961
263961
273961
283961
293961
303961
314060

Chance of precipitation in December

Any precipitation

Greytown gets around 107 mm of rain over 17.1 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 55% and peaks near 58% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
154
254
355
456
557
657
757
858
958
1057
1157
1256
1356
1455
1554
1654
1753
1853
1952
2052
2152
2252
2352
2453
2553
2653
2754
2854
2954
3054
3154

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 42% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13245211
23146231
32946241
42846251
52647261
62547271
72447291
82346301
92146311
102046321
111946331
121846341
131845361
141745372
151645382
161644392
171544392
181443402
191343412
201342423
211241443
221240454
231139464
241138475
251137475
261136486
271135486
281134497
291134497
301133498
311132498

Wind in December

Winds average 8 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 42 min at the start of December to 13 h 48 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 4:56 AM to 5:06 AM, and sunset from 6:39 PM to 6:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.74:566:39
213.74:566:40
313.74:566:41
413.84:566:41
513.84:566:42
613.84:566:43
713.84:566:43
813.84:566:44
913.84:566:45
1013.84:576:46
1113.84:576:46
1213.84:576:47
1313.84:576:47
1413.84:586:48
1513.84:586:49
1613.84:586:49
1713.94:596:50
1813.94:596:50
1913.94:596:51
2013.95:006:51
2113.95:006:52
2213.95:016:52
2313.95:016:53
2413.95:026:53
2513.95:026:54
2613.95:036:54
2713.95:036:54
2813.85:046:55
2913.85:056:55
3013.85:056:56
3113.85:066:56

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.9 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.4 kWh/m² to a high of 5.9 kWh/m² in December across the year — December's 5.9 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.7Bright
45.7Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
186.0Bright
196.0Bright
206.0Bright
216.0Intense
226.0Intense
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.0Intense
296.0Intense
306.0Intense
316.0Intense
Planning a trip in December

Hazard calendar for Greytown

In seasonPeak

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

Greytown'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 Greytown?

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

5.4
Sightseeing
11th-best month of the year
5.5
Beach & pool
9th-best month of the year

December is a reasonable time to visit Greytown for sightseeing.

What to pack for Greytown in December

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

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

rain gearlight clothessun protection

UV index in Greytown in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Greytown peaks around January 14 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeHighModerateHighVery highExtremeJan 14UV 14Jul 10UV 4
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr7High
May6High
Jun4Moderate
Jul4Moderate
Aug6High
Sep7Very high
Oct11Extreme
Nov11Extreme
Dec13Extreme

Air quality in Greytown 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 Greytown is worst in July — around 100 µg/m³ PM2.5 (unhealthy), about 4.5× the cleanest month (January, 22 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorModerateJul 1399 µg/m³Jan 1222 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb28Moderate
Mar42Poor
Apr60Unhealthy
May91Unhealthy
Jun92Unhealthy
Jul100Unhealthy
Aug77Unhealthy
Sep62Unhealthy
Oct39Poor
Nov35Moderate
Dec23Moderate
Location & terrain

Where is Greytown?

Greytown sits at 29.1°S, 30.6°E, 1,050 m above sea level, in South Africa. The nearest listed city is Howick, 58 km away.

Topography around Greytown

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

Within 3 km, the terrain around Greytown has significant variations in elevation — a maximum elevation change of 407 m around an average of 1,082 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 812 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,775 m.

The land around Greytown is covered by trees (44%) and grassland (31%) within 3 km, trees (47%) and grassland (31%) within 16 km, and grassland (40%) and trees (34%) within 80 km.

3 km
407 m
16 km
812 m
80 km
1,775 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Howick 58 km · Mooi River 60 km · Pietermaritzburg 64 km · Mpophomeni 69 km · Estcourt 71 km · KwaDukuza 74 km · Shakaskraal 74 km · Tongaat 76 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 Greytown (-29.0642°, 30.5928°, elevation 1,050 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).