Fall Weather in Katherine Northern Territory, Australia

Daily high temperatures decrease by 5°F, from 92°F to 87°F, rarely falling below 82°F or exceeding 99°F. The highest daily average high temperature is 93°F on April 2.

Daily low temperatures decrease by 13°F, from 76°F to 63°F, rarely falling below 53°F or exceeding 78°F.

For reference, on October 23, the hottest day of the year, temperatures in Katherine typically range from 77°F to 99°F, while on July 5, the coldest day of the year, they range from 58°F to 85°F.

The figure below shows you a compact characterization of the hourly average fall temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Katsina, Nigeria (8,740 miles away); Rājkot, Gujarat, India (4,879 miles); and Lampang, Thailand (3,182 miles) are the far-away foreign places with temperatures most similar to Katherine (view comparison).

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The fall in Katherine experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 80% to 44%. The lowest chance of overcast or mostly cloudy conditions is 44% on May 30.

The clearest day of the fall is May 30, with clear, mostly clear, or partly cloudy conditions 56% of the time.

For reference, on January 6, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 86%, while on August 22, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 61%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Katherine, the chance of a wet day over the course of the fall is very rapidly decreasing, starting the season at 56% and ending it at 1%.

For reference, the year's highest daily chance of a wet day is 65% on January 23, and its lowest chance is 0% on July 6.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the fall in Katherine is very rapidly decreasing, starting the season at 8.2 inches, when it rarely exceeds 15.2 inches or falls below 2.5 inches, and ending the season at 0.1 inches, when it rarely exceeds 0.3 inches or falls below -0.0 inches.

Over the course of the fall in Katherine, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 3 minutes, implying an average daily decrease of 41 seconds, and weekly decrease of 4 minutes, 49 seconds.

The shortest day of the fall is May 31, with 11 hours, 20 minutes of daylight and the longest day is March 1, with 12 hours, 22 minutes of daylight.

The earliest sunrise of the fall in Katherine is 6:41 AM on March 1 and the latest sunrise is 17 minutes later at 6:58 AM on May 31.

The latest sunset is 7:04 PM on March 1 and the earliest sunset is 46 minutes earlier at 6:18 PM on May 31.

Daylight saving time is not observed in Katherine during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 6:09 AM and sets 12 hours, 59 minutes later, at 7:08 PM, while on June 20, the shortest day of the year, it rises at 7:04 AM and sets 11 hours, 16 minutes later, at 6:20 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the fall of 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

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 chance that a given day will be muggy in Katherine is very rapidly decreasing during the fall, falling from 95% to 10% over the course of the season.

For reference, on January 24, the muggiest day of the year, there are muggy conditions 98% of the time, while on July 29, the least muggy day of the year, there are muggy conditions 1% of the time.

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 Katherine is rapidly increasing during the fall, increasing from 7.0 miles per hour to 10.0 miles per hour over the course of the season.

For reference, on July 15, the windiest day of the year, the daily average wind speed is 10.6 miles per hour, while on December 1, the calmest day of the year, the daily average wind speed is 6.7 miles per hour.

The hourly average wind direction in Katherine throughout the fall is predominantly from the east, with a peak proportion of 88% on May 27.

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).

Temperatures in Katherine 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.

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.

The average accumulated growing degree days in Katherine are very rapidly increasing during the fall, increasing by 2,588°F, from 7,232°F to 9,821°F, over the course of the season.

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 in Katherine is essentially constant during the fall, remaining within 0.3 kWh of 5.8 kWh throughout.

The highest average daily incident shortwave solar energy during the fall is 6.1 kWh on April 8.

For the purposes of this report, the geographical coordinates of Katherine are -14.465 deg latitude, 132.263 deg longitude, and 361 ft elevation.

The topography within 2 miles of Katherine contains only modest variations in elevation, with a maximum elevation change of 115 feet and an average elevation above sea level of 354 feet. Within 10 miles contains only modest variations in elevation (499 feet). Within 50 miles contains significant variations in elevation (1,037 feet).

The area within 2 miles of Katherine is covered by sparse vegetation (55%), artificial surfaces (27%), and trees (17%), within 10 miles by sparse vegetation (79%) and trees (10%), and within 50 miles by sparse vegetation (73%) and trees (25%).