Climate and Average Weather Year Round in Yass Australia

In Yass, the summers are warm and mostly clear and the winters are cold and partly cloudy. Over the course of the year, the temperature typically varies from 35°F to 85°F and is rarely below 26°F or above 96°F.

Based on the tourism score, the best time of year to visit Yass for warm-weather activities is from late December to early March.

The warm season lasts for 3.3 months, from December 2 to March 11, with an average daily high temperature above 78°F. The hottest month of the year in Yass is January, with an average high of 84°F and low of 59°F.

The cool season lasts for 3.3 months, from May 24 to September 3, with an average daily high temperature below 59°F. The coldest month of the year in Yass is July, with an average low of 35°F and high of 52°F.

In Yass, 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 Yass begins around August 10 and lasts for 9.0 months, ending around May 10.

The clearest month of the year in Yass is February, during which on average the sky is clear, mostly clear, or partly cloudy 73% of the time.

The cloudier part of the year begins around May 10 and lasts for 3.0 months, ending around August 10.

The cloudiest month of the year in Yass is June, during which on average the sky is overcast or mostly cloudy 49% 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 Yass varies throughout the year.

The wetter season lasts 6.9 months, from May 24 to December 21, with a greater than 19% chance of a given day being a wet day. The month with the most wet days in Yass is August, with an average of 7.4 days with at least 0.04 inches of precipitation.

The drier season lasts 5.1 months, from December 21 to May 24. The month with the fewest wet days in Yass is April, with an average of 4.4 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Yass is August, with an average of 7.4 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 25% on August 29.

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. Yass experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Yass. The month with the most rain in Yass is November, with an average rainfall of 2.1 inches.

The month with the least rain in Yass is April, with an average rainfall of 1.4 inches.

The length of the day in Yass varies significantly over the course of the year. In 2024, the shortest day is June 21, with 9 hours, 49 minutes of daylight; the longest day is December 21, with 14 hours, 30 minutes of daylight.

The earliest sunrise is at 5:35 AM on October 5, and the latest sunrise is 1 hour, 45 minutes later at 7:20 AM on April 6. The earliest sunset is at 4:59 PM on June 12, and the latest sunset is 3 hours, 22 minutes later at 8:21 PM on January 7.

Daylight saving time (DST) is observed in Yass during 2024, starting in the spring on October 6 and ending in the fall on April 7.

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

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.

The perceived humidity level in Yass, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 1% of 1% throughout.

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 Yass experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 7.5 months, from July 30 to March 14, with average wind speeds of more than 7.8 miles per hour. The windiest month of the year in Yass is January, with an average hourly wind speed of 8.6 miles per hour.

The calmer time of year lasts for 4.5 months, from March 14 to July 30. The calmest month of the year in Yass is May, with an average hourly wind speed of 6.9 miles per hour.

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

The wind is most often from the east for 3.6 months, from January 2 to April 20, with a peak percentage of 53% on February 25. The wind is most often from the west for 8.4 months, from April 20 to January 2, with a peak percentage of 40% on January 1.

To characterize how pleasant the weather is in Yass 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 time of year to visit Yass for general outdoor tourist activities is from late December to early March, with a peak score in the last week of January.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Yass for hot-weather activities is from mid January to early February, with a peak score in the last week of January.

Methodology

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.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Yass typically lasts for 7.6 months (229 days), from around September 22 to around May 9, rarely starting before August 30 or after October 16, and rarely ending before April 15 or after June 7.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Yass should appear around September 10, only rarely appearing before August 29 or after September 24.

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 extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.5 months, from November 1 to February 16, with an average daily incident shortwave energy per square meter above 7.1 kWh. The brightest month of the year in Yass is December, with an average of 8.2 kWh.

The darker period of the year lasts for 3.2 months, from May 6 to August 13, with an average daily incident shortwave energy per square meter below 3.5 kWh. The darkest month of the year in Yass is June, with an average of 2.3 kWh.

For the purposes of this report, the geographical coordinates of Yass are -34.840 deg latitude, 148.910 deg longitude, and 1,594 ft elevation.

The topography within 2 miles of Yass contains only modest variations in elevation, with a maximum elevation change of 463 feet and an average elevation above sea level of 1,680 feet. Within 10 miles contains only modest variations in elevation (1,532 feet). Within 50 miles contains very significant variations in elevation (5,092 feet).

The area within 2 miles of Yass is covered by cropland (54%), artificial surfaces (23%), and sparse vegetation (20%), within 10 miles by cropland (59%) and sparse vegetation (28%), and within 50 miles by cropland (46%) and sparse vegetation (31%).