Average Weather in Dalby Australia

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2. Australia
3. Queensland
4. Western Downs
5. Dalby

In Dalby, the summers are long, hot, and partly cloudy and the winters are short, cold, dry, and mostly clear. Over the course of the year, the temperature typically varies from 39°F to 89°F and is rarely below 29°F or above 96°F.

The hot season lasts for 4.4 months, from November 13 to March 25, with an average daily high temperature above 84°F. The hottest day of the year is January 17, with an average high of 89°F and low of 67°F.

The cool season lasts for 2.8 months, from May 27 to August 22, with an average daily high temperature below 70°F. The coldest day of the year is July 29, with an average low of 39°F and high of 66°F.

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.

In Dalby, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Dalby begins around June 20 and lasts for 4.0 months, ending around October 20. On August 13, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 89% of the time, and overcast or mostly cloudy 11% of the time.

The cloudier part of the year begins around October 20 and lasts for 8.0 months, ending around June 20. On January 17, the cloudiest day of the year, the sky is overcast or mostly cloudy 34% of the time, and clear, mostly clear, or partly cloudy 66% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Dalby varies throughout the year.

The wetter season lasts 4.4 months, from October 15 to February 26, with a greater than 19% chance of a given day being a wet day. The chance of a wet day peaks at 29% on December 14.

The drier season lasts 7.6 months, from February 26 to October 15. The smallest chance of a wet day is 8% on June 21.

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 29% on December 14.

Rainfall

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. Dalby experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Dalby. The most rain falls during the 31 days centered around December 11, with an average total accumulation of 3.0 inches.

The least rain falls around August 2, with an average total accumulation of 0.8 inches.

The length of the day in Dalby varies over the course of the year. In 2017, the shortest day is June 21, with 10 hours, 26 minutes of daylight; the longest day is December 21, with 13 hours, 52 minutes of daylight.

The earliest sunrise is at 4:52 AM on December 2, and the latest sunrise is 1 hour, 53 minutes later at 6:45 AM on July 2. The earliest sunset is at 5:08 PM on June 9, and the latest sunset is 1 hour, 46 minutes later at 6:54 PM on January 11.

Daylight saving time (DST) is not observed in Dalby during 2017.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Dalby experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.9 months, from November 23 to March 19, during which time the comfort level is muggy, oppressive, or miserable at least 7% of the time. The muggiest day of the year is February 6, with muggy conditions 26% of the time.

The least muggy day of the year is August 12, when muggy conditions are essentially unheard of.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Dalby experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.3 months, from September 23 to April 3, with average wind speeds of more than 5.0 miles per hour. The windiest day of the year is February 26, with an average hourly wind speed of 5.6 miles per hour.

The calmer time of year lasts for 5.7 months, from April 3 to September 23. The calmest day of the year is May 20, with an average hourly wind speed of 4.5 miles per hour.

The predominant average hourly wind direction in Dalby varies throughout the year.

The wind is most often from the south for 1.6 months, from June 23 to August 12, with a peak percentage of 35% on July 27. The wind is most often from the east for 10 months, from August 12 to June 23, with a peak percentage of 57% on January 1.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.4 months, from October 12 to February 23, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest day of the year is December 9, with an average of 7.8 kWh.

The darker period of the year lasts for 2.9 months, from May 5 to August 1, with an average daily incident shortwave energy per square meter below 4.4 kWh. The darkest day of the year is June 15, with an average of 3.6 kWh.

For the purposes of this report, the geographical coordinates of Dalby are -27.182 deg latitude, 151.262 deg longitude, and 1,122 ft elevation.

The topography within 2 miles of Dalby is essentially flat, with a maximum elevation change of 89 feet and an average elevation above sea level of 1,122 feet. Within 10 miles is essentially flat (358 feet). Within 50 miles contains only modest variations in elevation (2,805 feet).

The area within 2 miles of Dalby is covered by sparse vegetation (33%), cropland (29%), and artificial surfaces (27%), within 10 miles by cropland (81%), and within 50 miles by sparse vegetation (48%) and cropland (34%).

This report illustrates the typical weather in Dalby, 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

There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Dalby.

For each station, the records are corrected for the elevation difference between that station and Dalby according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Dalby is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Dalby and a given station.

The stations contributing to this reconstruction are: Oakey Aerodrome (68%, 53 kilometers, southeast) and Kingaroy Airport (32%, 89 kilometers, northeast).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.