Climate Insights for Mittagong

The climate in Mittagong is temperate. The average annual temperature is 14°C and approximately 878mm of precipitation falls per year. Mittagong receives a notable amount of rainfall throughout the year, including during its driest month. Mittagong 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.

Temperatures in Mittagong vary considerably across the year, with a 22°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 26°C and the mean temperature sits around 20°C. July is the coolest month, with minimum temperatures around 4°C and an average of 8°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 4°C shift in average temperatures.

Mittagong is a moderately rainy area, receiving approximately 878mm of precipitation annually, which averages out to around 73mm per month. The wettest month is March, averaging 129mm of rainfall. January and February also tend to see above-average precipitation. The driest month is May, with just 43mm. That's 86mm 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.

Mittagong is mildly breezy, with an average annual wind speed of 15km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in April, with average winds dropping to 13km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.

It is currently autumn in Mittagong, which began on March 20, 2026. Mittagong 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 26°C, while the coldest stretch bottoms out in July near 4°C. Winter is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Mittagong is during November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 82mm per month. By contrast, January can be uncomfortably hot with highs reaching 26°C, while July is the coldest period with lows dropping to 4°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Mittagong 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.