Average Weather at Mount Isa Airport Australia
At Mount Isa Airport, the summers are long, sweltering, humid, and partly cloudy and the winters are short, cool, dry, windy, and mostly clear. Over the course of the year, the temperature typically varies from 49°F to 97°F and is rarely below 39°F or above 104°F.
Based on the tourism score, the best times of year to visit Mount Isa Airport for warm-weather activities are from late March to mid May and from early September to mid November.
The hot season lasts for 5.2 months, from October 13 to March 21, with an average daily high temperature above 93°F. The hottest day of the year is December 10, with an average high of 97°F and low of 74°F.
The cool season lasts for 2.6 months, from May 26 to August 13, with an average daily high temperature below 79°F. The coldest day of the year is July 17, with an average low of 49°F and high of 76°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
At Mount Isa Airport, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.
The clearer part of the year at Mount Isa Airport begins around March 30 and lasts for 7.9 months, ending around November 28. On September 12, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 85% of the time, and overcast or mostly cloudy 15% of the time.
The cloudier part of the year begins around November 28 and lasts for 4.1 months, ending around March 30. On January 13, the cloudiest day of the year, the sky is overcast or mostly cloudy 66% of the time, and clear, mostly clear, or partly cloudy 34% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Mount Isa Airport varies significantly throughout the year.
The wetter season lasts 4.1 months, from November 10 to March 14, with a greater than 17% chance of a given day being a wet day. The chance of a wet day peaks at 32% on February 18.
The drier season lasts 7.9 months, from March 14 to November 10. The smallest chance of a wet day is 1% on August 11.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 32% on February 18.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Mount Isa Airport experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 5.9 months, from October 13 to April 11, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around January 13, with an average total accumulation of 3.8 inches.
The rainless period of the year lasts for 6.1 months, from April 11 to October 13. The least rain falls around August 13, with an average total accumulation of 0.1 inches.
Average Monthly Rainfall
The length of the day at Mount Isa Airport varies over the course of the year. In 2018, the shortest day is June 21, with 10 hours, 53 minutes of daylight; the longest day is December 22, with 13 hours, 23 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:52 AM on November 28, and the latest sunrise is 1 hour, 27 minutes later at 7:19 AM on July 5. The earliest sunset is at 6:08 PM on June 6, and the latest sunset is 1 hour, 20 minutes later at 7:28 PM on January 16.
Daylight saving time (DST) is not observed at Mount Isa Airport during 2018.
Sunrise & Sunset with Twilight
Mount Isa Airport experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.6 months, from November 13 to April 1, during which time the comfort level is muggy, oppressive, or miserable at least 13% of the time. The muggiest day of the year is February 14, with muggy conditions 51% of the time.
The least muggy day of the year is July 5, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed at Mount Isa Airport experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 7.8 months, from March 21 to November 16, with average wind speeds of more than 9.7 miles per hour. The windiest day of the year is October 10, with an average hourly wind speed of 10.6 miles per hour.
The calmer time of year lasts for 4.2 months, from November 16 to March 21. The calmest day of the year is February 24, with an average hourly wind speed of 8.9 miles per hour.
Average Wind Speed
The predominant average hourly wind direction at Mount Isa Airport varies throughout the year.
The wind is most often from the south for 4.1 months, from May 17 to September 20 and for 2.0 months, from October 7 to December 6, with a peak percentage of 56% on June 28. The wind is most often from the east for 2.4 weeks, from September 20 to October 7 and for 5.4 months, from December 6 to May 17, with a peak percentage of 39% on September 20.
Best Time of Year to Visit
To characterize how pleasant the weather is at Mount Isa Airport throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Mount Isa Airport for general outdoor tourist activities are from late March to mid May and from early September to mid November, with a peak score in the second week of October.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit Mount Isa Airport for hot-weather activities are from mid March to early April and from mid October to mid December, with a peak score in the second week of November.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
Temperatures at Mount Isa Airport are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season
Growing Degree Days
The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year.
The brighter period of the year lasts for 4.4 months, from September 27 to February 10, with an average daily incident shortwave energy per square meter above 7.1 kWh. The brightest day of the year is November 3, with an average of 7.7 kWh.
The darker period of the year lasts for 2.7 months, from May 5 to July 29, with an average daily incident shortwave energy per square meter below 5.3 kWh. The darkest day of the year is June 13, with an average of 4.7 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Mount Isa Airport are -20.664 deg latitude, 139.489 deg longitude, and 1,152 ft elevation.
The topography within 2 miles of Mount Isa Airport contains only modest variations in elevation, with a maximum elevation change of 371 feet and an average elevation above sea level of 1,142 feet. Within 10 miles contains only modest variations in elevation (866 feet). Within 50 miles also contains very significant variations in elevation (1,470 feet).
The area within 2 miles of Mount Isa Airport is covered by sparse vegetation (67%) and trees (13%), within 10 miles by sparse vegetation (65%) and trees (16%), and within 50 miles by sparse vegetation (56%) and trees (28%).
This report illustrates the typical weather at Mount Isa Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
Mount Isa Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.There are no other weather stations in our network within 200 kilometers of this location. Consequently, in the case of missing or erroneous measurements from this station, we fall back on NASA's MERRA-2 modern-era reanalysis , adjusted according to typical seasonal and diurnal differences between this station and the wide-area MERRA-2 reconstructed values.
Time zones for aiports and weather stations are provided by AskGeo.com .