Theunissen weather in January

In January, Theunissen sees average daytime highs of 30°C and overnight lows near 17°C, with 96 mm of rain across 13.6 wet days and about 13.6 hours of daylight. It is the 1st-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 49% of the time in January, and the air most often feels dry.

Daylight stretches from about 13 h 48 min at the start of January to 13 h 24 min by month's end. Set against the rest of the year, January is Theunissen's 11th-clearest and 5th-windiest month. For the whole year in context, see Theunissen's year-round climate.

Daytime high
30°
1st warmest
Overnight low
17°
12th coldest
Rainfall
96 mm
13.6 wet days
Daylight
13 h 36 min
5:34 AM – 7:11 PM
Cloud cover
44%
11th clearest
Wind
11 km/h
5th windiest
Solar energy
7.28 kWh/m²
Travel score
4.9
out of 10

Theunissen is place in Free State, South Africa.

Founded
1907

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 30°C through the month.

A typical January day in Theunissen reaches about 30°C in the afternoon and slips back to 17°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 34°C. Set against its neighbours, January runs on par with December and about 1°C warmer than February.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13017
23017
33017
43017
53017
63017
73017
83017
93017
103017
113017
123017
133017
143017
153017
163017
173017
183017
193017
203017
213017
223017
233017
243017
253017
263017
273017
282917
292917
302917
312917

How January really feels in Theunissen

Once humidity and wind are folded in, January 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

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

Theunissen weather by month

How January compares with the rest of the year at a glance. January 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
Jan30° / 17°9613.613.64.9
Feb29° / 17°7911.8135.4
Mar27° / 15°7510.612.26.6
Apr24° / 11°497.411.37.7
May21° / 213.310.68.2
Jun18° / 121.810.27.8
Jul18° / 71.310.48.0
Aug21° / 162.4118.5
Sep25° / 142.611.88.6
Oct27° / 12°527.812.77.2
Nov28° / 14°769.513.46.0
Dec30° / 16°8912.913.85.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 25% of January, with mostly cloudy or overcast conditions the remaining 26%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17624
27624
37525
47525
57624
67525
77525
87624
97525
107525
117426
127525
137426
147426
157426
167327
177327
187327
197327
207228
217228
227228
237228
247129
257228
267228
277228
287228
297327
307327
317327

Chance of precipitation in January

Any precipitation

Theunissen gets around 96 mm of rain over 13.6 wet days in January, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 44% and peaks near 47% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
141
241
340
440
541
641
741
841
941
1041
1141
1242
1342
1443
1544
1644
1745
1846
1946
2046
2147
2247
2347
2447
2547
2646
2746
2845
2945
3044
3144

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the dry band about 44% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
1513514
2513514
3513514
4513514
5513514
6513514
7513514
8513514
9513514
10503615
11493615
12483616
13483617
14473518
15463519
16443520
17433521
18423622
19413623
20403624
21393624
22383625
23373726
24373726
25363726
26363726
27363826
28353826
29353826
30353926
31353925

Wind in January

Winds average 11 km/h in January.

Across January, 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
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 13 h 48 min at the start of January to 13 h 24 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 5:23 AM to 5:46 AM, and sunset from 7:10 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:237:10
213.85:247:10
313.85:247:10
413.85:257:10
513.75:267:11
613.75:267:11
713.75:277:11
813.75:287:11
913.75:287:11
1013.75:297:11
1113.75:307:11
1213.75:317:11
1313.75:317:11
1413.75:327:11
1513.65:337:11
1613.65:347:11
1713.65:357:11
1813.65:357:11
1913.65:367:11
2013.65:377:11
2113.55:387:10
2213.55:397:10
2313.55:397:10
2413.55:407:10
2513.55:417:09
2613.55:427:09
2713.45:437:09
2813.45:437:08
2913.45:447:08
3013.45:457:08
3113.45:467:07

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 7.28 kWh/m².

For context, solar energy here swings from a low near 3.66 kWh/m² to a high of 7.54 kWh/m² in December across the year — January's 7.28 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.5Intense
27.5Intense
37.5Intense
47.5Intense
57.5Intense
67.5Intense
77.5Intense
87.5Intense
97.4Intense
107.4Intense
117.4Intense
127.4Intense
137.4Intense
147.4Intense
157.3Intense
167.3Intense
177.3Intense
187.3Intense
197.2Intense
207.2Intense
217.2Intense
227.2Intense
237.1Intense
247.1Intense
257.1Intense
267.1Intense
277.1Intense
287.1Intense
297.0Intense
307.0Intense
317.0Intense
Planning a trip in January

Hazard calendar for Theunissen

In seasonPeak

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

Theunissen'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 January a good time to visit Theunissen?

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

4.9
Sightseeing
12th-best month of the year
6.6
Beach & pool
7th-best month of the year

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

What to pack for Theunissen in January

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

In January, Theunissen sees daytime highs around 30°C and nights near 17°C. Pack light clothes and sun protection. Worth having: rain gear. About 14 days see rain.

light clothessun protectionrain gear

UV index in Theunissen in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Theunissen peaks around January 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 14UV 15Jun 21UV 5
UV index (midday)Level
Jan15Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May6High
Jun5Moderate
Jul5Moderate
Aug7High
Sep9Very high
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in Theunissen 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 Theunissen is worst in July — around 25 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (December, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1025 µg/m³Dec 187 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar13Moderate
Apr16Moderate
May21Moderate
Jun24Moderate
Jul25Moderate
Aug23Moderate
Sep22Moderate
Oct16Moderate
Nov8Good
Dec7Good
Location & terrain

Where is Theunissen?

Theunissen sits at 28.4°S, 26.7°E, 1,406 m above sea level, in South Africa. The nearest listed city is Winburg, 32 km away.

Topography around Theunissen

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

Within 3 km, the terrain around Theunissen has only modest variations in elevation — a maximum elevation change of 87 m around an average of 1,393 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 303 m; within 80 km, large variations in elevation — a maximum elevation change of 626 m.

The land around Theunissen is covered by grassland (69%) within 3 km, grassland (74%) and cropland (23%) within 16 km, and grassland (64%) and cropland (33%) within 80 km.

3 km
87 m
16 km
303 m
80 km
626 m
treesshrubsgrasslandcroplandartificial surfaceswater
January weather nearby: Winburg 32 km · Virginia 38 km · Winnie Mandela 40 km · Welkom 48 km · Bultfontein 56 km · Hennenman 58 km · Phomolong 58 km · Odendaalsrus 60 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 Theunissen (-28.411°, 26.7011°, elevation 1,406 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).