Graaff-Reinet Temperature by Month
The average annual maximum temperature in Graaff-Reinet, Eastern Cape, South Africa is 25°C (77°F), with daytime highs ranging from 19°C (66°F) in July to 30°C (86°F) in January. This page covers monthly averages, day-night differences, and how Graaff-Reinet compares to cities worldwide.
Graaff-Reinet Monthly Temperatures
Graaff-Reinet experiences balanced seasonal shifts, with noticeable but moderate temperature variations. At night, minimum temperatures range from 16°C (61°F) in January to 5°C (41°F) in July.
The chart below illustrates the average maximum day and minimum night temperatures in Graaff-Reinet by month:
Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
41-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in June
Historical Graaff-Reinet Temperatures: 1976-2026
Browse day-by-day temperature records for Graaff-Reinet spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Graaff-Reinet 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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Graaff-Reinet vs World: Temperature Compared
Graaff-Reinet's average annual maximum temperature is 25°C (77°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Queenstown, New Zealand averages 10°C (50°F) annually — remember seasons are flipped, so its coldest months fall in June and July.
San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation — summers are often cool and foggy, winters mild.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
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.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Graaff-Reinet's weather — including monthly rainfall, sunshine hours, and humidity — visit our Graaff-Reinet climate page.
