Climate Insights for Lake Johnston Airport

The climate in Lake Johnston Airport is temperate. The average annual temperature is 17°C and approximately 291mm of precipitation falls per year. February is the wettest month, receiving around 54mm of rainfall. Lake Johnston Airport 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 Lake Johnston Airport vary considerably across the year, with a 25°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 31°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 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 5°C shift in average temperatures.

Lake Johnston Airport is a quite dry location, receiving approximately 291mm of precipitation annually, which averages out to around 24mm per month. The wettest month is February, averaging 54mm of rainfall. August and January also tend to see above-average precipitation. The driest month is May, with just 14mm. That's 40mm less than February, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Lake Johnston Airport is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in April, 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 winter in Lake Johnston Airport, which began on June 21, 2026. Lake Johnston Airport 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 31°C, while the coldest stretch bottoms out in July near 6°C. Spring is next, beginning on September 23, 2026 — 84 days from now.

The best time to visit Lake Johnston Airport is during January, February, March, 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 25mm per month. By contrast, July can be quite cold with temperatures dropping to 6°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Lake Johnston Airport 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.