Climate Overview
The climate in Graaff Reinet is temperate. The average annual temperature is 17°C and approximately 423mm of precipitation falls per year. February is the wettest month, receiving around 54mm of rainfall. Graaff Reinet 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: January, December, February. The coldest months are July, August, June, when temperatures can drop to 4°C.
Temperature
Temperatures in Graaff Reinet vary considerably across the year, with a 27°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 31°C and the mean temperature sits around 23°C. July is the coolest month, with minimum temperatures around 4°C and an average of 11°C. On average, daily temperatures fluctuate by about 15°C between overnight lows and afternoon highs. The sharpest temperature change occurs between March and April, with a 4°C shift in average temperatures.
Precipitation
Graaff Reinet is a relatively dry area, receiving approximately 423mm of precipitation annually, which averages out to around 35mm per month. The wettest month is February, averaging 54mm of rainfall. January and March also tend to see above-average precipitation. The driest month is August, with just 15mm. That's 39mm less than February, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.
Wind
Graaff Reinet is mildly breezy, with an average annual wind speed of 18km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in April, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months.
Seasons
89 days until Winter
It is currently autumn in Graaff Reinet, which began on March 20, 2026. Graaff Reinet 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 January at around 31°C, while the coldest stretch bottoms out in July near 4°C. Winter is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 7 to 27°C. Rainfall is relatively light, with around 103mm over the season and a monthly average of 34mm. Winds are moderate at around 19km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 14 to 31°C. Precipitation is moderate at around 154mm for the season, averaging 51mm per month. Winds are moderate at around 20km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 8 to 28°C. Rainfall is relatively light, with around 119mm over the season and a monthly average of 40mm. Winds are moderate at around 16km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from 4 to 20°C. Rainfall is relatively light, with around 48mm over the season and a monthly average of 16mm. Winds are moderate at around 18km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Graaff Reinet is during January, February, March, April, September, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 44mm per month. By contrast, July can be quite cold with temperatures dropping to 4°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 Graaff Reinet 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.
