Germiston Temperature by Month
Germiston in South Africa sees moderate seasonal temperature shifts, with daytime highs between 20°C (68°F) in July and 27°C (81°F) in January, averaging 24°C (75°F) annually. Explore the full monthly breakdown below.
Germiston Monthly Temperatures
In Germiston, seasonal changes bring about a moderate variation in temperatures. Nighttime lows range from 16°C (61°F) in January to 4°C (39°F) in July.
The chart below illustrates the average maximum day and minimum night temperatures in Germiston by month:
The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. January, the city's warmest month, gets 250 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Germiston vs South Africa
The map below shows the annual temperature across South Africa. You can also select individual months if you want to compare a specific time of year.
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Germiston vs World: Temperature Compared
Germiston's average annual maximum temperature is 24°C (75°F). To put that in context, here's how it compares to a few well-known destinations:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot summers.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
What Does the Temperature Feel Like in Germiston?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Germiston, July is the coolest month, with average highs of 20°C (68°F) and humidity around 49% — considered moderate. In January, the warmest month, temperatures average 27°C (81°F) with 69% humidity — conditions that feel high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Germiston this rarely lasts long on the ground.
For more on Germiston's weather — including monthly rainfall, sunshine hours, and humidity — visit our Germiston climate page.
