Climate Insights for Ermelo

The climate in Ermelo is temperate. The average annual temperature is 15°C and approximately 878mm of precipitation falls per year. December is the wettest month, receiving around 191mm of rainfall. Ermelo 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: September, January, December. The coldest months are July, June, August, when temperatures can drop to 3°C.

Temperatures in Ermelo vary considerably across the year, with a 21°C difference between the coldest and warmest months. September is the warmest month, though highs remain moderate at 24°C with a mean of 16°C. July is the coolest month, with minimum temperatures around 3°C and an average of 10°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between July and August, with a 3°C shift in average temperatures.

Ermelo is a moderately rainy area, receiving approximately 878mm of precipitation annually, which averages out to around 73mm per month. The wettest month is December, averaging 191mm of rainfall. January and November also tend to see above-average precipitation. The driest month is August, with just 4mm. That's 187mm less than December, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Ermelo is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months.

It is currently winter in Ermelo, which began on June 21, 2026. Ermelo 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 September at around 24°C, while the coldest stretch bottoms out in July near 3°C. Spring is next, beginning on September 23, 2026 (7 days from now).

The best time to visit Ermelo is during March, April, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 60mm per month. By contrast, July can be quite cold with temperatures dropping to 3°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Ermelo 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.