Climate Insights for Glenbrook

The climate in Glenbrook is temperate. The average annual temperature is 17°C and approximately 831mm of precipitation falls per year. Glenbrook receives a notable amount of rainfall throughout the year, including during its driest month. Glenbrook 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 6°C.

Temperatures in Glenbrook vary considerably across the year, with a 23°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 29°C and the mean temperature sits around 23°C. July is the coolest month, with minimum temperatures around 6°C and an average of 11°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 4°C shift in average temperatures.

Glenbrook is a moderately rainy area, receiving approximately 831mm of precipitation annually, which averages out to around 69mm per month. The wettest month is March, averaging 136mm of rainfall. February and January also tend to see above-average precipitation. The driest month is August, with just 37mm. That's 99mm 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.

Glenbrook is mildly breezy, with an average annual wind speed of 14km/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 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 12km/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. Wind tends to pick up during the summer months. The seasonal averages are 13km/h in winter, 16km/h in spring, 16km/h in summer, 13km/h in autumn.

It is currently autumn in Glenbrook, which began on March 20, 2026. Glenbrook 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 29°C, while the coldest stretch bottoms out in July near 6°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Glenbrook is during January, February, April, 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 79mm per month. By contrast, July can be quite cold with temperatures dropping to 6°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 Glenbrook 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.