Zastron weather in December

In December, Zastron sees average daytime highs of 28°C and overnight lows near 14°C, with 127 mm of rain across 12 wet days and about 13.9 hours of daylight. It is the 2nd-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 48% of the time in December, and the air most often feels dry.

Daylight stretches from about 13 h 48 min at the start of December to 13 h 54 min by month's end. Set against the rest of the year, December is Zastron's 10th-clearest and 3rd-windiest month. For the whole year in context, see Zastron's year-round climate.

Daytime high
28°
2nd warmest
Overnight low
14°
10th coldest
Rainfall
127 mm
12 wet days
Daylight
13 h 54 min
5:09 AM – 7:06 PM
Cloud cover
43%
10th clearest
Wind
12 km/h
3rd windiest
Solar energy
7.76 kWh/m²
Travel score
6.0
out of 10

Zastron is small agricultural town in the Free State province of South Africa.

Founded
1875

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 28°C through the month.

A typical December day in Zastron reaches about 28°C in the afternoon and slips back to 14°C overnight — a 15°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 33°C. Set against its neighbours, December runs about 2°C warmer than November and on par with January.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12713
22713
32713
42813
52813
62813
72813
82813
92813
102813
112813
122813
132814
142814
152814
162814
172814
182814
192814
202914
212914
222914
232914
242914
252914
262915
272915
282915
292915
302915
312915

How December really feels in Zastron

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Zastron weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 15°14714.513.75.4
Feb28° / 15°13213.813.15.8
Mar26° / 12°1151312.26.7
Apr22° / 728.611.37.2
May19° / 284.410.57.4
Jun16° / 173.110.16.5
Jul16° / 132.510.26.7
Aug19° / 233.610.97.7
Sep23° / 233.811.88.3
Oct25° / 10°728.812.77.4
Nov27° / 12°979.813.56.8
Dec28° / 14°1271213.96.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 25% of December, with mostly cloudy or overcast conditions the remaining 27%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17129
27129
37129
47129
57129
67129
77030
87129
97129
107129
117228
127228
137327
147327
157327
167327
177327
187426
197426
207426
217426
227525
237525
247426
257525
267525
277525
287624
297624
307624
317624

Chance of precipitation in December

Any precipitation

Zastron gets around 127 mm of rain over 12 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
239
340
440
541
641
741
841
940
1040
1140
1240
1340
1440
1540
1639
1739
1838
1938
2037
2137
2237
2337
2437
2537
2637
2737
2838
2938
3039
3139

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 78% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
188111
288111
387121
487121
586131
685141
785141
884151
984151
1083161
1182171
1282171
1380182
1479192
1579192
1678202
1778202
1877212
1976213
2075223
2175223
2274233
2372244
2471254
2571254
2670264
2768275
2868275
2967285
3067285
3166295

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
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 48 min at the start of December to 13 h 54 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 5:07 AM to 5:17 AM, and sunset from 6:56 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:076:56
213.85:076:57
313.85:076:57
413.95:076:58
513.95:076:59
613.95:077:00
713.95:077:00
813.95:077:01
913.95:087:02
1013.95:087:02
1113.95:087:03
1213.95:087:04
1313.95:097:04
1413.95:097:05
1513.95:097:06
1613.95:097:06
1713.95:107:07
1814.05:107:07
1914.05:117:08
2014.05:117:08
2114.05:117:09
2214.05:127:09
2314.05:127:10
2414.05:137:10
2514.05:137:11
2614.05:147:11
2713.95:157:11
2813.95:157:12
2913.95:167:12
3013.95:167:12
3113.95:177:13

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.76 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.41 kWh/m² to a high of 7.76 kWh/m² in December across the year — December's 7.76 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.7Intense
27.7Intense
37.7Intense
47.7Intense
57.7Intense
67.7Intense
77.7Intense
87.7Intense
97.7Intense
107.7Intense
117.7Intense
127.7Intense
137.8Intense
147.8Intense
157.8Intense
167.8Intense
177.8Intense
187.8Intense
197.8Intense
207.8Intense
217.8Intense
227.8Intense
237.8Intense
247.8Intense
257.8Intense
267.8Intense
277.8Intense
287.8Intense
297.8Intense
307.7Intense
317.7Intense
Planning a trip in December

Hazard calendar for Zastron

In seasonPeak

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

Zastron's rainy season runs October–April, 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 Zastron?

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

6.0
Sightseeing
10th-best month of the year
6.8
Beach & pool
1st-best month of the year

December is a reasonable time to visit Zastron for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Zastron in December

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

In December, Zastron sees daytime highs around 28°C and nights near 14°C. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.

light clothessun protectionrain gear

UV index in Zastron 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 Zastron peaks around January 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 13UV 15Jun 23UV 4
UV index (midday)Level
Jan15Extreme
Feb13Extreme
Mar11Extreme
Apr7Very high
May6High
Jun4Moderate
Jul4Moderate
Aug6High
Sep8Very high
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in Zastron 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 Zastron is worst in June — around 19 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (December, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2218 µg/m³Dec 216 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb8Good
Mar10Good
Apr13Moderate
May16Moderate
Jun19Moderate
Jul18Moderate
Aug17Moderate
Sep16Moderate
Oct12Good
Nov7Good
Dec6Good
Location & terrain

Where is Zastron?

Zastron sits at 30.3°S, 27.1°E, 1,668 m above sea level, in South Africa. The nearest listed city is Mohale's Hoek, 41 km away.

Topography around Zastron

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

Within 3 km, the terrain around Zastron has significant variations in elevation — a maximum elevation change of 579 m around an average of 1,723 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 718 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,658 m.

The land around Zastron is covered by grassland (73%) within 3 km, grassland (87%) within 16 km, and grassland (86%) within 80 km.

3 km
579 m
16 km
718 m
80 km
1,658 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Mohale's Hoek 41 km · Mafeteng 55 km · Aliwal North 56 km · Quthing 60 km · Burgersdorp 106 km · Maseru 116 km · Botshabelo 120 km · Mabote 121 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 Zastron (-30.3023°, 27.084°, elevation 1,668 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).