Climate Insights for Mount Isa

The climate in Mount Isa is hot. The average annual temperature is 25°C and approximately 442 mm of precipitation falls per year. March is the wettest month, receiving around 106 mm of rainfall. Mount Isa 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: December, January, November. The coldest months are July, June, August, when temperatures can drop to 11°C.The climate in Mount Isa is hot. The average annual temperature is 77°F and approximately 17.4 in of precipitation falls per year. March is the wettest month, receiving around 4.2 in of rainfall. Mount Isa 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: December, January, November. The coldest months are July, June, August, when temperatures can drop to 51°F.

Temperatures in Mount Isa vary considerably across the year, with a 26°C difference between the coldest and warmest months. December is the hottest month, with daytime highs reaching 37°C and an average of 31°C. July is the coolest month, with minimum temperatures around 11°C and an average of 17°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.Temperatures in Mount Isa vary considerably across the year, with a 48°F difference between the coldest and warmest months. December is the hottest month, with daytime highs reaching 99°F and an average of 88°F. July is the coolest month, with minimum temperatures around 51°F and an average of 63°F. On average, daily temperatures fluctuate by about 23°F between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 8°F shift in average temperatures.

Mount Isa is a relatively dry area, receiving approximately 442 mm of precipitation annually, which averages out to around 37 mm per month. The wettest month is March, averaging 106 mm of rainfall. February and January also tend to see above-average precipitation. The driest month is August, with just 3 mm. That's 104 mm less than March, 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.Mount Isa is a relatively dry area, receiving approximately 17.4 in of precipitation annually, which averages out to around 1.5 in per month. The wettest month is March, averaging 4.2 in of rainfall. February and January also tend to see above-average precipitation. The driest month is August, with just 0.1 in. That's 4.1 in less than March, 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.

Mount Isa is mildly breezy, with an average annual wind speed of 17km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is May, averaging 19km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 15km/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 be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 17km/h in winter, 16km/h in spring, 15km/h in summer, 17km/h in autumn.Mount Isa is moderately windy, with an average annual wind speed of 10mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is May, averaging 12mph, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in January, with average winds dropping to 9mph, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3mph between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 11mph in winter, 10mph in spring, 9mph in summer, 11mph in autumn.

The best time to visit Mount Isa is during May, June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 8 mm per month. By contrast, December can be uncomfortably hot with temperatures reaching 37°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.The best time to visit Mount Isa is during May, June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 68°F with modest rainfall averaging 0.3 in per month. By contrast, December can be uncomfortably hot with temperatures reaching 99°F. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Mount Isa 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.The table below shows monthly climate averages for Mount Isa based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.