Average Weather in April in Mount Barker Australia
Daily high temperatures decrease by 6°F, from 73°F to 67°F, rarely falling below 59°F or exceeding 84°F.
Daily low temperatures decrease by 4°F, from 51°F to 47°F, rarely falling below 40°F or exceeding 59°F.
For reference, on January 20, the hottest day of the year, temperatures in Mount Barker typically range from 55°F to 80°F, while on July 20, the coldest day of the year, they range from 40°F to 57°F.
Average High and Low Temperature in April
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. 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.
Average Hourly Temperature in April
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
Moraga, California, United States (9,165 miles away); Santa Catarina da Serra, Portugal (9,516 miles); and Cambridge, New Zealand (3,178 miles) are the far-away foreign places with temperatures most similar to Mount Barker (view comparison).
The month of April in Mount Barker experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 35% to 41%.
The clearest day of the month is April 1, with clear, mostly clear, or partly cloudy conditions 65% of the time.
For reference, on May 14, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 43%, while on January 28, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 79%.
Cloud Cover Categories in April
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Mount Barker, the chance of a wet day over the course of April is increasing, starting the month at 15% and ending it at 21%.
For reference, the year's highest daily chance of a wet day is 39% on July 28, and its lowest chance is 7% on December 30.
Probability of Precipitation in April
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during April in Mount Barker is gradually increasing, starting the month at 1.3 inches, when it rarely exceeds 2.7 inches or falls below 0.2 inches, and ending the month at 1.6 inches, when it rarely exceeds 2.9 inches or falls below 0.5 inches.
Average Monthly Rainfall in April
Over the course of April in Mount Barker, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 58 minutes, implying an average daily decrease of 2 minutes, 1 second, and weekly decrease of 14 minutes, 5 seconds.
The shortest day of the month is April 30, with 10 hours, 45 minutes of daylight and the longest day is April 1, with 11 hours, 43 minutes of daylight.
Hours of Daylight and Twilight in April
The earliest sunrise of the month in Mount Barker is 6:21 AM on April 1 and the latest sunrise is 23 minutes later at 6:44 AM on April 30.
The latest sunset is 6:04 PM on April 1 and the earliest sunset is 36 minutes earlier at 5:28 PM on April 30.
Daylight saving time is not observed in Mount Barker during 2018.
For reference, on December 21, the longest day of the year, the Sun rises at 4:52 AM and sets 14 hours, 29 minutes later, at 7:21 PM, while on June 21, the shortest day of the year, it rises at 7:16 AM and sets 9 hours, 50 minutes later, at 5:06 PM.
Sunrise & Sunset with Twilight in April
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 Mount Barker is essentially constant during April, remaining around 0% throughout.
For reference, on February 14, the muggiest day of the year, there are muggy conditions 1% of the time, while on April 26, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in April
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Mount Barker is essentially constant during April, remaining within 0.3 miles per hour of 10.8 miles per hour throughout.
For reference, on January 17, the windiest day of the year, the daily average wind speed is 12.8 miles per hour, while on April 22, the calmest day of the year, the daily average wind speed is 10.5 miles per hour.
The lowest daily average wind speed during April is 10.5 miles per hour on April 22.
Average Wind Speed in April
Wind Direction in April
Mount Barker 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 Mount Barker is essentially constant during April, remaining around 69°F throughout.
Average Water Temperature in April
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 Mount Barker typically lasts for 9.8 months (298 days), from around August 26 to around June 20, rarely starting after October 11, or ending before May 16.
The month of April in Mount Barker is very likely fully within the growing season, with the chance that a given day is in the growing season gradually decreasing from 100% to 97% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in April
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
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 Mount Barker are increasing during April, increasing by 263°F, from 2,441°F to 2,704°F, over the course of the month.
Growing Degree Days in April
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 Mount Barker is decreasing during April, falling by 1.4 kWh, from 4.8 kWh to 3.4 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in April
For the purposes of this report, the geographical coordinates of Mount Barker are -34.631 deg latitude, 117.666 deg longitude, and 830 ft elevation.
The topography within 2 miles of Mount Barker contains significant variations in elevation, with a maximum elevation change of 591 feet and an average elevation above sea level of 862 feet. Within 10 miles contains significant variations in elevation (1,368 feet). Within 50 miles contains very significant variations in elevation (3,524 feet).
The area within 2 miles of Mount Barker is covered by cropland (54%) and trees (37%), within 10 miles by cropland (67%) and trees (20%), and within 50 miles by cropland (40%) and trees (28%).
This report illustrates the typical weather in Mount Barker year round, 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 is only a single weather station, Albany Aerodrome, in our network suitable to be used as a proxy for the historical temperature and dew point records of Mount Barker.
At a distance of 37 kilometers from Mount Barker, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
The station records are corrected for the elevation difference between the station and Mount Barker according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.
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.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.