Welkom, South Africa climate

BSh Hot semi-arid

Welkom has a mildly seasonal warm-temperate climate (Hot semi-arid, Köppen BSh). The hottest month is January with an average daily high near 32°C, while the coldest is July averaging around 2°C at night. Precipitation totals about 357 mm a year and is strongly seasonal — December alone averages 76 mm while July barely receives 2 mm.

☀️ Summers

Hot

Highs near 32°C in January.

❄️ Winters

Chilly

Lows near 2°C in July.

🌧️ Rain

Fairly dry

About 357 mm of rain a year.

Wettest in December

⛅ Sky & trend

Fairly sunny

More sun than cloud through the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Welkom climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	32	32	30	27	24	21	20	24	28	30	31	32
Avg temp (°C)	25	24	22	19	15	12	11	14	18	21	23	24
Avg low (°C)	17	17	15	11	6	3	2	5	9	13	14	16
Precipitation (mm)	66	43	45	19	9	7	2	5	6	26	51	76

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	32	32	30	27	24	21
Avg temp (°C)	25	24	22	19	15	12
Avg low (°C)	17	17	15	11	6	3
Precipitation (mm)	66	43	45	19	9	7

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	20	24	28	30	31	32
Avg temp (°C)	11	14	18	21	23	24
Avg low (°C)	2	5	9	13	14	16
Precipitation (mm)	2	5	6	26	51	76

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	57	54	48	41	28	22	20	26	33	47	52	59
Relative humidity (%)	53	56	57	57	52	53	50	43	36	43	47	50
Wind speed (m/s)	2.4	2.1	2.0	2.0	2.0	2.1	2.2	2.6	2.8	2.9	2.9	2.7

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	57	54	48	41	28	22
Relative humidity (%)	53	56	57	57	52	53
Wind speed (m/s)	2.4	2.1	2.0	2.0	2.0	2.1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	20	26	33	47	52	59
Relative humidity (%)	50	43	36	43	47	50
Wind speed (m/s)	2.2	2.6	2.8	2.9	2.9	2.7

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 21 years of daily observations at Welkom, a weather station, about 7 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →