Climate Overview
The climate in Postmasburg is hot. The average annual temperature is 27°C and approximately 248mm of precipitation falls per year. November is the wettest month, receiving around 33mm of rainfall. Postmasburg 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, September, November. The coldest months are January, October, June, when temperatures can drop to 26°C.
Temperature
Postmasburg has relatively stable temperatures year-round, staying within a 5°C range. The warmest month is January, when average highs reach 31°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 26°C and an average of 28°C. Daily temperature variation is modest, with an average difference of 1°C between highs and lows.
Precipitation
Postmasburg is a quite dry location, receiving approximately 248mm of precipitation annually, which averages out to around 21mm per month. The wettest month is August, averaging 33mm of rainfall. September and October also tend to see above-average precipitation. The driest month is June, with just 7mm. That's 26mm less than August, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.
Wind
Postmasburg is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 6km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.
Seasons
16 days until Spring
It is currently winter in Postmasburg, which began on June 21, 2026. Postmasburg 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 January near 26°C. Spring is next, beginning on September 23, 2026 — 16 days from now.
Spring
Temperatures range from 26 to 28°C. Rainfall is relatively light, with around 98mm over the season and a monthly average of 33mm. Winds are generally light, averaging 5km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 26 to 31°C. Rainfall is relatively light, with around 53mm over the season and a monthly average of 18mm. Winds are generally light, averaging 5km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 26 to 28°C. Precipitation is minimal, with only around 39mm for the entire season. Winds are generally light, averaging 5km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from 26 to 28°C. Rainfall is relatively light, with around 58mm over the season and a monthly average of 19mm. Winds are generally light, averaging 3km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Postmasburg 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.
