Climate Insights for Merweville

The climate in Merweville is temperate. The average annual temperature is 18°C and approximately 233mm of precipitation falls per year. March is the wettest month, receiving around 30mm of rainfall. Merweville 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, February, December. The coldest months are July, August, June, when temperatures can drop to 4°C.

Temperatures in Merweville vary considerably across the year, with a 29°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 33°C and the mean temperature sits around 24°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.

Merweville is a quite dry location, receiving approximately 233mm of precipitation annually, which averages out to around 19mm per month. The wettest month is March, averaging 30mm of rainfall. January and December also tend to see above-average precipitation. The driest month is August, with just 9mm. That's 21mm less than March, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Merweville is moderately windy, with an average annual wind speed of 22km/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 25km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in May, with average winds dropping to 19km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 6km/h between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 22km/h in winter, 23km/h in spring, 24km/h in summer, 19km/h in autumn.

It is currently autumn in Merweville, which began on March 20, 2026. Merweville 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 33°C, while the coldest stretch bottoms out in July near 4°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Merweville is during January, February, March, April, May, 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 22mm per month. By contrast, July can be quite cold with temperatures dropping to 4°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Merweville 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.