Average Weather in Roma Australia

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In Roma, the summers are long, hot, and partly cloudy and the winters are short, cool, dry, and mostly clear. Over the course of the year, the temperature typically varies from 43°F to 95°F and is rarely below 34°F or above 103°F.

The hot season lasts for 4.5 months, from November 4 to March 21, with an average daily high temperature above 89°F. The hottest day of the year is January 15, with an average high of 95°F and low of 69°F.

The cool season lasts for 2.7 months, from May 25 to August 17, with an average daily high temperature below 72°F. The coldest day of the year is July 6, with an average low of 43°F and high of 67°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 Roma, 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 Roma begins around June 17 and lasts for 4.2 months, ending around October 24. On August 12, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 90% of the time, and overcast or mostly cloudy 9% of the time.

The cloudier part of the year begins around October 24 and lasts for 7.8 months, ending around June 17. On January 19, the cloudiest day of the year, the sky is overcast or mostly cloudy 35% of the time, and clear, mostly clear, or partly cloudy 65% 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 Roma varies throughout the year.

The wetter season lasts 4.7 months, from October 14 to March 4, with a greater than 16% chance of a given day being a wet day. The chance of a wet day peaks at 25% on December 14.

The drier season lasts 7.3 months, from March 4 to October 14. The smallest chance of a wet day is 7% on July 7.

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 25% 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. Roma experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Roma. The most rain falls during the 31 days centered around February 3, with an average total accumulation of 2.8 inches.

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

The length of the day in Roma varies over the course of the year. In 2017, the shortest day is June 21, with 10 hours, 28 minutes of daylight; the longest day is December 21, with 13 hours, 49 minutes of daylight.

The earliest sunrise is at 5:03 AM on December 1, and the latest sunrise is 1 hour, 50 minutes later at 6:53 AM on July 2. The earliest sunset is at 5:19 PM on June 9, and the latest sunset is 1 hour, 44 minutes later at 7:02 PM on January 11.

Daylight saving time (DST) is not observed in Roma 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.

Roma experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.3 months, from November 21 to March 29, 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 8, with muggy conditions 29% of the time.

The least muggy day of the year is July 10, 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 Roma experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.9 months, from August 25 to March 23, with average wind speeds of more than 4.8 miles per hour. The windiest day of the year is November 25, with an average hourly wind speed of 5.4 miles per hour.

The calmer time of year lasts for 5.1 months, from March 23 to August 25. The calmest day of the year is May 12, with an average hourly wind speed of 4.3 miles per hour.

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

The wind is most often from the south for 3.8 months, from May 23 to September 17, with a peak percentage of 42% on July 5. The wind is most often from the north for 3.3 months, from September 17 to December 25, with a peak percentage of 40% on November 29. The wind is most often from the east for 4.9 months, from December 25 to May 23, with a peak percentage of 40% 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 4.5 months, from October 11 to February 24, with an average daily incident shortwave energy per square meter above 7.0 kWh. The brightest day of the year is December 28, with an average of 7.9 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 4.6 kWh. The darkest day of the year is June 14, with an average of 3.7 kWh.

For the purposes of this report, the geographical coordinates of Roma are -26.567 deg latitude, 148.788 deg longitude, and 1,014 ft elevation.

The topography within 2 miles of Roma contains only modest variations in elevation, with a maximum elevation change of 108 feet and an average elevation above sea level of 1,008 feet. Within 10 miles contains only modest variations in elevation (696 feet). Within 50 miles contains significant variations in elevation (1,713 feet).

The area within 2 miles of Roma is covered by sparse vegetation (43%), artificial surfaces (20%), cropland (14%), and trees (14%), within 10 miles by sparse vegetation (38%) and cropland (34%), and within 50 miles by sparse vegetation (54%) and trees (19%).

This report illustrates the typical weather in Roma, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Roma is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . 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.

The temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Roma, according to the International Standard Atmosphere .

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.

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.