Summer Weather in Palmerston Australia

Daily high temperatures decrease by 4°F, from 92°F to 88°F, rarely falling below 83°F or exceeding 95°F. The lowest daily average high temperature is 88°F on February 20.

Daily low temperatures are around 77°F, rarely falling below 74°F or exceeding 82°F.

For reference, on October 18, the hottest day of the year, temperatures in Palmerston typically range from 77°F to 93°F, while on July 2, the coldest day of the year, they range from 66°F to 87°F.

The figure below shows you a compact characterization of the hourly average summer 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.

Cuiabá, Brazil (10,449 miles away) and Thāne, India (4,519 miles) are the far-away foreign places with temperatures most similar to Palmerston (view comparison).

© OpenStreetMap contributors

Compare Palmerston to another city:

CompareMap

The summer in Palmerston experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 87% throughout the season. The highest chance of overcast or mostly cloudy conditions is 90% on January 11.

The clearest day of the summer is December 1, with clear, mostly clear, or partly cloudy conditions 16% of the time.

For reference, on January 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 90%, while on August 22, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 55%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Palmerston, the chance of a wet day over the course of the summer is very rapidly increasing, starting the season at 59% and ending it at 74%.

For reference, the year's highest daily chance of a wet day is 77% on January 25, and its lowest chance is 0% on June 25.

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 summer in Palmerston is very rapidly increasing, starting the season at 7.0 inches, when it rarely exceeds 12.6 inches or falls below 3.0 inches, and ending the season at 13.7 inches, when it rarely exceeds 22.4 inches or falls below 6.7 inches.

The highest average 31-day accumulation is 14.8 inches on February 11.

Over the course of the summer in Palmerston, the length of the day is gradually decreasing. From the start to the end of the season, the length of the day decreases by 28 minutes, implying an average daily decrease of 19 seconds, and weekly decrease of 2 minutes, 10 seconds.

The shortest day of the summer is February 28, with 12 hours, 21 minutes of daylight and the longest day is December 21, with 12 hours, 52 minutes of daylight.

The earliest sunrise of the summer in Palmerston is 6:10 AM on December 1 and the latest sunrise is 37 minutes later at 6:48 AM on February 28.

The earliest sunset is 6:59 PM on December 1 and the latest sunset is 20 minutes later at 7:19 PM on January 24.

Daylight saving time is not observed in Palmerston during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 6:18 AM and sets 12 hours, 52 minutes later, at 7:10 PM, while on June 20, the shortest day of the year, it rises at 7:05 AM and sets 11 hours, 23 minutes later, at 6:29 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 summer 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 Palmerston is essentially constant during the summer, remaining around 100% throughout.

The highest chance of a muggy day during the summer is 100% on February 4.

For reference, on January 19, the muggiest day of the year, there are muggy conditions 100% of the time, while on July 4, the least muggy day of the year, there are muggy conditions 23% 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 Palmerston is increasing during the summer, increasing from 6.6 miles per hour to 8.5 miles per hour over the course of the season.

For reference, on June 8, the windiest day of the year, the daily average wind speed is 9.8 miles per hour, while on November 17, the calmest day of the year, the daily average wind speed is 6.3 miles per hour.

The highest daily average wind speed during the summer is 9.2 miles per hour on January 22.

The hourly average wind direction in Palmerston throughout the summer is predominantly from the west, with a peak proportion of 69% on February 9.

Palmerston is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Palmerston is gradually decreasing during the summer, falling by 2°F, from 88°F to 86°F, over the course of the season.

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 Palmerston 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 Palmerston are very rapidly increasing during the summer, increasing by 2,826°F, from 4,576°F to 7,402°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 Palmerston is essentially constant during the summer, remaining within 0.4 kWh of 4.7 kWh throughout.

The lowest average daily incident shortwave solar energy during the summer is 4.4 kWh on January 23.

For the purposes of this report, the geographical coordinates of Palmerston are -12.486 deg latitude, 130.983 deg longitude, and 118 ft elevation.

The topography within 2 miles of Palmerston contains only modest variations in elevation, with a maximum elevation change of 167 feet and an average elevation above sea level of 90 feet. Within 10 miles also contains only modest variations in elevation (256 feet). Within 50 miles contains only modest variations in elevation (840 feet).

The area within 2 miles of Palmerston is covered by artificial surfaces (57%), sparse vegetation (23%), and trees (17%), within 10 miles by trees (33%) and sparse vegetation (27%), and within 50 miles by water (40%) and sparse vegetation (29%).