Climate Insights for Merweville

The climate in Merweville is warm and mild. The average annual temperature is 18°C and approximately 134mm of precipitation falls per year. January is the wettest month, receiving around 23mm 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: February, January, 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 February, when average highs reach 33°C and the mean temperature sits around 25°C. July is the coolest month, with minimum temperatures around 4°C and an average of 12°C. The average daily temperature swing is 16°C, meaning significant differences between daytime and nighttime temperatures. The sharpest temperature change occurs between August and September, with a 4°C shift in average temperatures.

Merweville is a quite dry location, receiving approximately 134mm of precipitation annually, which averages out to around 11mm per month. The wettest month is January, averaging 23mm of rainfall. April and March also tend to see above-average precipitation. The driest month is December, with just 5mm. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Merweville is relatively calm, with an average annual wind speed of 3km/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 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.

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 February at around 33°C, while the coldest stretch bottoms out in July near 4°C. Winter is next, beginning on June 21, 2026 — 3 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 21°C with modest rainfall averaging 12mm 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.