Climate Insights for Randvaal

Sedibeng District Municipality, Gauteng, South Africa

Hottest
December
27°C peak
Coldest
July
3°C low
Wettest
December
127mm rain
Best to Visit
March, April, September
Mild temps & low rain

Climate Overview

The climate in Randvaal is temperate. The average annual temperature is 17°C and approximately 684mm of precipitation falls per year. December is the wettest month, receiving around 127mm of rainfall. Randvaal is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: December, October, November. The coldest months are July, June, August, when temperatures can drop to 3°C.

Temperature

10° 15° 20° 25° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 27° Average: 21° Min: 16° Feb Max: 27° Average: 21° Min: 16° Mar Max: 26° Average: 20° Min: 14° Apr Max: 24° Average: 17° Min: 11° May Max: 22° Average: 14° Min: 7° Jun Max: 19° Average: 11° Min: 4° Jul Max: 19° Average: 11° Min: 3° Aug Max: 23° Average: 14° Min: 6° Sep Max: 26° Average: 18° Min: 10° Oct Max: 27° Average: 20° Min: 13° Nov Max: 27° Average: 21° Min: 14° Dec Max: 27° Average: 21° Min: 16°
Max
Average
Min

Temperatures in Randvaal vary considerably across the year, with a 24°C difference between the coldest and warmest months. The warmest month is December, when average highs reach 27°C and the mean temperature sits around 21°C. July is the coolest month, with minimum temperatures around 3°C and an average of 11°C. On average, daily temperatures fluctuate by about 14°C between overnight lows and afternoon highs. The sharpest temperature change occurs between August and September, with a 4°C shift in average temperatures.

Precipitation

0mm 25mm 50mm 75mm 100mm 125mm 150mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 122mm Feb Precipitation: 109mm Mar Precipitation: 64mm Apr Precipitation: 64mm May Precipitation: 18mm Jun Precipitation: 6mm Jul Precipitation: 4mm Aug Precipitation: 2mm Sep Precipitation: 12mm Oct Precipitation: 54mm Nov Precipitation: 98mm Dec Precipitation: 127mm
Precipitation

Randvaal is a relatively dry area, receiving approximately 684mm of precipitation annually, which averages out to around 57mm per month. The wettest month is December, averaging 127mm of rainfall. January and February also tend to see above-average precipitation. The driest month is August, with just 2mm. That's 126mm less than December, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h 25km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 17km/h Feb Wind Speed: 16km/h Mar Wind Speed: 16km/h Apr Wind Speed: 15km/h May Wind Speed: 14km/h Jun Wind Speed: 15km/h Jul Wind Speed: 16km/h Aug Wind Speed: 19km/h Sep Wind Speed: 21km/h Oct Wind Speed: 20km/h Nov Wind Speed: 20km/h Dec Wind Speed: 19km/h
Wind Speed

Randvaal is mildly breezy, with an average annual wind speed of 17km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in May, with average winds dropping to 14km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/h gap between the calmest and windiest months.

Seasons

Winter
Dec 21
Spring
Sep 23
Summer
Dec 21
Autumn
Mar 20

3 days until Autumn

It is currently winter in Randvaal, which began on June 21, 2026. Randvaal is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in December at around 27°C, while the coldest stretch bottoms out in July near 3°C. Autumn is next, beginning on March 20, 2026 — 3 days from now.

Spring

Temperatures range from 10 to 27°C. Precipitation is moderate at around 165mm for the season, averaging 55mm per month. Winds are moderate at around 21km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.

Summer

Temperatures range from 16 to 27°C. Rainfall is heavy, totalling around 359mm across the season with a monthly average of 120mm. Winds are moderate at around 17km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 7 to 26°C. Rainfall is relatively light, with around 147mm over the season and a monthly average of 49mm. Winds are moderate at around 15km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.

Winter

Temperatures range from 3 to 23°C. Precipitation is minimal, with only around 12mm for the entire season. Winds are moderate at around 17km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.

Best Time to Visit

Jan 21°
Feb 21°
Mar 20°
Apr 17°
May 14°
Jun 11°
Jul 11°
Aug 14°
Sep 18°
Oct 20°
Nov 21°
Dec 21°

The best time to visit Randvaal is during March, April, September, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 59mm per month. By contrast, December can be uncomfortably hot with highs reaching 27°C, while July is the coldest period with lows dropping to 3°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

Monthly Climate Data

The table below shows monthly climate averages for Randvaal based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
16 °C
27 °C
17 km/h
122 mm
0 cm
Feb
16 °C
27 °C
16 km/h
109 mm
0 cm
Mar Current
14 °C
26 °C
16 km/h
64 mm
0 cm
Apr
11 °C
24 °C
15 km/h
64 mm
0 cm
May
7 °C
22 °C
14 km/h
18 mm
0 cm
Jun
4 °C
19 °C
15 km/h
6 mm
0 cm
Jul
3 °C
19 °C
16 km/h
4 mm
0 cm
Aug
6 °C
23 °C
19 km/h
2 mm
0 cm
Sep
10 °C
26 °C
21 km/h
12 mm
0 cm
Oct
13 °C
27 °C
20 km/h
54 mm
0 cm
Nov
14 °C
27 °C
20 km/h
98 mm
0 cm
Dec
16 °C
27 °C
19 km/h
127 mm
0 cm
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Metric (°C, km/h)