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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 90°F, while the coldest is July averaging around 36°F at night. Precipitation totals about 14 inches a year and is strongly seasonal — December alone averages 3.0 inches while July barely receives 0.07 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours 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 (°F) | 90 | 89 | 86 | 80 | 75 | 69 | 69 | 74 | 82 | 87 | 88 | 89 |
| Avg temp (°F) | 76 | 75 | 72 | 66 | 59 | 53 | 53 | 57 | 65 | 71 | 73 | 75 |
| Avg low (°F) | 63 | 62 | 59 | 52 | 43 | 37 | 36 | 40 | 48 | 55 | 57 | 61 |
| Precipitation (in) | 2.6 | 1.7 | 1.8 | 0.8 | 0.4 | 0.3 | 0.1 | 0.2 | 0.3 | 1.0 | 2.0 | 3.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 90 | 89 | 86 | 80 | 75 | 69 |
| Avg temp (°F) | 76 | 75 | 72 | 66 | 59 | 53 |
| Avg low (°F) | 63 | 62 | 59 | 52 | 43 | 37 |
| Precipitation (in) | 2.6 | 1.7 | 1.8 | 0.8 | 0.4 | 0.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 69 | 74 | 82 | 87 | 88 | 89 |
| Avg temp (°F) | 53 | 57 | 65 | 71 | 73 | 75 |
| Avg low (°F) | 36 | 40 | 48 | 55 | 57 | 61 |
| Precipitation (in) | 0.1 | 0.2 | 0.3 | 1.0 | 2.0 | 3.0 |
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 (mph) | 5.3 | 4.8 | 4.5 | 4.5 | 4.4 | 4.7 | 4.9 | 5.8 | 6.3 | 6.4 | 6.5 | 5.9 |
| 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 (mph) | 5.3 | 4.8 | 4.5 | 4.5 | 4.4 | 4.7 |
| 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 (mph) | 4.9 | 5.8 | 6.3 | 6.4 | 6.5 | 5.9 |
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.