Derby, South Africa

Full City Profile

4,157 Population 3/sq mi density

5,243 ft Elevation 1,598 meters

62°F Avg Temperature 17°C

Derby enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 70°F in January while summers reach 50°F in July. The area gets 288 sunny days per year. Annual precipitation totals 26.7 inches. The area receives 0.0 inches of snow annually.

Temperature

70°F Jan (21°C) 50°F Jul (10°C)

Annual Average	61.9°F
	15% above US avg
January Average	70°F (21°C)
July Average	50°F (10°C)
Sunny Days	288 days/yr

Geography

Elevation	5,243 ft (1,598 m)
Area	1,639.4 sq mi (4,245.9 km²)
Population Density	3/sq mi
Coordinates	-25.9091°N, 27.0416°W
Timezone	Africa/Johannesburg

Precipitation & Snow

Annual Rainfall 26.7"

30% below US avg

Snowfall 0.0"

Wettest Month (Jan) 5.04"

Driest Month (Jul) 0.20"

Air Quality

Earthquake History

965 earthquakes (M2.5+) within 150 km since 1990. Strongest: M5.4. Most recent: M4.8 on Jul 10, 2025.

Aug 5, 2014	3 km ESE of Orkney, South Africa	M5.4	125 km
Apr 3, 2017	7 km SSE of Stilfontein, South Africa	M5.2	114 km
Feb 10, 1997	5 km SSE of Orkney, South Africa	M5.2	128 km
Nov 3, 1991	5 km SE of Klerksdorp, South Africa	M5.1	115 km
Dec 1, 1991	2 km S of Klerksdorp, South Africa	M5.0	114 km
Mar 16, 2009	8 km ENE of Orkney, South Africa	M5.0	119 km
May 27, 2002	4 km ENE of Orkney, South Africa	M5.0	122 km
Jul 21, 1997	4 km W of Klerksdorp, South Africa	M5.0	114 km
Mar 9, 2005	7 km SSE of Stilfontein, South Africa	M5.0	114 km
Jun 14, 2010	8 km NNW of Fochville, South Africa	M5.0	71 km
Dec 11, 1997	7 km SSW of Klerksdorp, South Africa	M4.9	118 km
Dec 5, 1998	9 km NNE of Fochville, South Africa	M4.9	73 km
Aug 6, 2000	8 km SSW of Westonaria, South Africa	M4.9	77 km
Jun 11, 2023	Gauteng, South Africa	M4.9	121 km
Sep 6, 2004	17 km WNW of Klerksdorp, South Africa	M4.9	110 km
Nov 25, 1995	South Africa	M4.9	118 km
Jul 31, 2001	8 km SW of Klerksdorp, South Africa	M4.9	120 km
Feb 17, 2005	13 km WSW of Klerksdorp, South Africa	M4.9	122 km
Mar 7, 1992	14 km W of Fochville, South Africa	M4.9	74 km
Jun 15, 2014	8 km E of Orkney, South Africa	M4.9	123 km

Source: USGS (M2.5+, 1990–2025)

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	70°F (21°C)	5.0 in	Warmest, Wettest
February	69°F (21°C)	3.8 in
March	67°F (19°C)	3.5 in
April	62°F (16°C)	1.9 in
May	55°F (13°C)	0.6 in
June	50°F (10°C)	0.2 in
July	50°F (10°C)	0.2 in	Coldest, Driest
August	55°F (13°C)	0.3 in
September	62°F (17°C)	0.8 in
October	66°F (19°C)	2.3 in
November	68°F (20°C)	3.4 in
December	70°F (21°C)	4.5 in

Derby has a seasonal temperature swing of 21°F / from 50°F in July to 70°F in January. Total annual precipitation is 26.7 inches, with January being the wettest month (5.0") and July the driest (0.2").

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