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Benoni, Gauteng Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Benoni, Gauteng?
Benoni, Gauteng gets 648 mm of precipitation a year over about 94 rainy days. January is the warmest month (average high 28°C) and July the coldest (average low 5°C).
Semi-arid climate
Benoni, Gauteng has hot summers and warm winters. Daytime highs range from about 20°C in July to 28°C in January. December is usually the wettest month. The most comfortable time to visit is typically April to August, when daytime highs sit near 22°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Jun–Aug | 6° | 21° |
| Spring | Sep–Nov | 13° | 28° |
| Summer | Dec–Feb | 16° | 28° |
| Autumn | Mar–May | 12° | 25° |
How much rain does Benoni get?
Benoni gets 648 mm of precipitation in an average year, spread over about 94 days with measurable rain. That is more rainy days than 78% of South Africa.
December is the wettest month, with 118 mm. July is the driest, with 3 mm. December has the most rainy days, about 15.
Benoni weather by month
Benoni weather in January
In January, Benoni averages a high of 28°C and a low of 16°C. It gets 113 mm of precipitation over about 15 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The January record high is 39°C (2016) and the record low is 8°C (2001).
Benoni weather in February
In February, Benoni averages a high of 28°C and a low of 16°C. It gets 91 mm of precipitation over about 11 rainy days. Estimated sunshine is 46% of daylight hours, derived from ERA5 cloud cover. The February record high is 35°C (2016) and the record low is 11°C (2002).
Benoni weather in March
In March, Benoni averages a high of 27°C and a low of 14°C. It gets 85 mm of precipitation over about 11 rainy days. Estimated sunshine is 58% of daylight hours, derived from ERA5 cloud cover. The March record high is 35°C (2024) and the record low is 6°C (2025).
Benoni weather in April
In April, Benoni averages a high of 25°C and a low of 12°C. It gets 35 mm of precipitation over about 7 rainy days. Estimated sunshine is 68% of daylight hours, derived from ERA5 cloud cover. The April record high is 34°C (1995) and the record low is 0°C (2001). April is one of the most comfortable months to visit.
Benoni weather in May
In May, Benoni averages a high of 23°C and a low of 8°C. It gets 19 mm of precipitation over about 4 rainy days. Estimated sunshine is 81% of daylight hours, derived from ERA5 cloud cover. The May record high is 30°C (2024) and the record low is -1°C (2007). May is one of the most comfortable months to visit.
Benoni weather in June
In June, Benoni averages a high of 21°C and a low of 6°C. It gets 9 mm of precipitation over about 2 rainy days. Estimated sunshine is 89% of daylight hours, derived from ERA5 cloud cover. The June record high is 27°C (1998) and the record low is -2°C (2020). June is one of the most comfortable months to visit.
Benoni weather in July
In July, Benoni averages a high of 20°C and a low of 5°C. It gets 3 mm of precipitation over about 1 rainy days. Estimated sunshine is 91% of daylight hours, derived from ERA5 cloud cover. The July record high is 27°C (2002) and the record low is -4°C (2000). July is one of the most comfortable months to visit.
Benoni weather in August
In August, Benoni averages a high of 23°C and a low of 7°C. It gets 8 mm of precipitation over about 2 rainy days. Estimated sunshine is 85% of daylight hours, derived from ERA5 cloud cover. The August record high is 32°C (2020) and the record low is -5°C (2003). August is one of the most comfortable months to visit.
Benoni weather in September
In September, Benoni averages a high of 27°C and a low of 11°C. It gets 16 mm of precipitation over about 4 rainy days. Estimated sunshine is 79% of daylight hours, derived from ERA5 cloud cover. The September record high is 34°C (2018) and the record low is 0°C (2015).
Benoni weather in October
In October, Benoni averages a high of 28°C and a low of 13°C. It gets 50 mm of precipitation over about 8 rainy days. Estimated sunshine is 63% of daylight hours, derived from ERA5 cloud cover. The October record high is 36°C (2024) and the record low is 0°C (1994).
Benoni weather in November
In November, Benoni averages a high of 28°C and a low of 14°C. It gets 103 mm of precipitation over about 13 rainy days. Estimated sunshine is 50% of daylight hours, derived from ERA5 cloud cover. The November record high is 37°C (2015) and the record low is 4°C (2002).
Benoni weather in December
In December, Benoni averages a high of 28°C and a low of 16°C. It gets 118 mm of precipitation over about 15 rainy days. Estimated sunshine is 43% of daylight hours, derived from ERA5 cloud cover. The December record high is 37°C (2015) and the record low is 6°C (1994).
Sunshine, humidity and wind in Benoni
July is the sunniest month in Benoni, with estimated sunshine of 91% of daylight hours from ERA5 cloud cover. December is the cloudiest, at 43%. The annual cloud-cover estimate is 66% of daylight hours; it is not a measurement of sunshine duration. Benoni is sunnier than 51% of South Africa.
Humidity peaks in January at 69% and is lowest in September at 36%.
Benoni has about 16 days a year above 32°C. Benoni is cooler than 60% of South Africa.
First and last freeze in Benoni
The first fall freeze in Benoni typically comes around July 7, and the last spring freeze around July 25. That leaves a frost-free growing season of about 347 days.
Benoni weather records
These records cover PRETORIA/IRENE during 1991–2025. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Benoni station is 39°C, on January 7, 2016. The coldest is -5°C, on August 21, 2003.
The wettest day in the available station history brought 181 mm of precipitation, on September 6, 2021.
34 all-time records have been set at the station since 1991.
The best time to visit Benoni
The most comfortable time to visit is typically April to August, when daytime highs sit near 22°C.
Winter (June–August) is warm, with average highs around 21°C and lows near 6°C.
Spring (September–November) is warm, with average highs around 28°C and lows near 13°C.
Summer (December–February) is hot, with average highs around 28°C and lows near 16°C.
Autumn (March–May) is warm, with average highs around 25°C and lows near 11°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 16° | 28° | 113 mm | 15 | 69% | 44% | 39° | 8° |
| February | 16° | 28° | 91 mm | 11 | 69% | 46% | 35° | 11° |
| March | 14° | 27° | 85 mm | 11 | 65% | 58% | 35° | 6° |
| April | 12° | 25° | 35 mm | 7 | 62% | 68% | 34° | 0° |
| May | 8° | 23° | 19 mm | 4 | 54% | 81% | 30° | -1° |
| June | 6° | 21° | 8.9 mm | 2 | 49% | 89% | 27° | -2° |
| July | 5° | 20° | 2.8 mm | 1 | 40% | 91% | 27° | -4° |
| August | 7° | 23° | 7.9 mm | 2 | 37% | 85% | 32° | -5° |
| September | 11° | 27° | 16 mm | 4 | 36% | 79% | 34° | 0° |
| October | 13° | 28° | 50 mm | 8 | 45% | 63% | 36° | 0° |
| November | 14° | 28° | 103 mm | 13 | 58% | 50% | 37° | 4° |
| December | 16° | 28° | 118 mm | 15 | 65% | 43% | 37° | 6° |
Station: PRETORIA/IRENE, 32 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1991–2025; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Benoni climate questions
How much rain does Benoni get?
Benoni gets 648 mm of precipitation in an average year, over about 94 rainy days.
What is the wettest month in Benoni?
December is the wettest month in Benoni, with 118 mm. July is the driest, with 3 mm.
How many rainy days does Benoni have a year?
Benoni has about 94 days with measurable rain in an average year. December has the most, about 15.
What is the hottest month in Benoni?
January is the warmest month in Benoni, with an average high of 28°C.
What is the coldest month in Benoni?
July is the coldest month in Benoni, with an average low of 5°C.
What is the record high temperature in Benoni?
Within the available 1991–2025 station history, the record high at the Benoni station is 39°C, set on January 7, 2016. The record low is -5°C, on August 21, 2003.
What is the sunniest month in Benoni?
July is the sunniest month in Benoni, with estimated sunshine of 91% of daylight hours from ERA5 cloud cover. December is the cloudiest.
When is the first frost in Benoni?
The first fall freeze in Benoni typically comes around July 7. The last spring freeze is around July 25.
What is the best time to visit Benoni?
The most comfortable time to visit is typically April to August, when daytime highs sit near 22°C.