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December Weather in Epping Australia

Daily high temperatures increase by 2°F, from 77°F to 79°F, rarely falling below 67°F or exceeding 90°F.

Daily low temperatures increase by 3°F, from 61°F to 64°F, rarely falling below 55°F or exceeding 69°F.

For reference, on January 25, the hottest day of the year, temperatures in Epping typically range from 66°F to 80°F, while on July 20, the coldest day of the year, they range from 43°F to 61°F.

Average High and Low Temperature in December in Epping

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on December. 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 December in Epping

Average Hourly Temperature in December in EppingDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNovJancoolcoolcomfortablewarm
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
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Montevideo, Uruguay (7,382 miles away) and Caxias do Sul, Brazil (7,860 miles) are the far-away foreign places with temperatures most similar to Epping (view comparison).

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The month of December in Epping experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 36% to 29%. The lowest chance of overcast or mostly cloudy conditions is 29% on December 29.

The clearest day of the month is December 29, with clear, mostly clear, or partly cloudy conditions 71% of the time.

For reference, on November 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 38%, while on August 12, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 81%.

Cloud Cover Categories in December in Epping

Cloud Cover Categories in December in EppingDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%NovJanNov 2162%Nov 2162%Dec 164%Dec 164%Dec 3171%Dec 3171%Dec 1166%Dec 1166%Dec 2169%Dec 2169%clearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Epping, the chance of a wet day over the course of December is decreasing, starting the month at 28% and ending it at 23%.

For reference, the year's highest daily chance of a wet day is 30% on January 31, and its lowest chance is 15% on August 12.

Probability of Precipitation in December in Epping

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

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 December in Epping is gradually decreasing, starting the month at 2.8 inches, when it rarely exceeds 5.4 inches or falls below 0.8 inches, and ending the month at 2.6 inches, when it rarely exceeds 4.9 inches or falls below 0.7 inches.

The lowest average 31-day accumulation is 2.5 inches on December 22.

Average Monthly Rainfall in December in Epping

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of December in Epping, the length of the day is essentially constant. The shortest day of the month is December 1, with 14 hours, 14 minutes of daylight and the longest day is December 22, with 14 hours, 24 minutes of daylight.

Hours of Daylight and Twilight in December in Epping

Hours of Daylight and Twilight in December in EppingDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrNovJanDec 2114 hr, 24 minDec 2114 hr, 24 mindaydaydaydaynightDec 114 hr, 14 minDec 114 hr, 14 min
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Epping is 5:37 AM on December 5 and the latest sunrise is 10 minutes later at 5:47 AM on December 31.

The earliest sunset is 7:51 PM on December 1 and the latest sunset is 18 minutes later at 8:09 PM on December 31.

Daylight saving time is observed in Epping during 2024, but it neither starts nor ends during December, so the entire month is in standard time.

For reference, on December 21, the longest day of the year, the Sun rises at 5:41 AM and sets 14 hours, 24 minutes later, at 8:05 PM, while on June 20, the shortest day of the year, it rises at 7:00 AM and sets 9 hours, 54 minutes later, at 4:54 PM.

Sunrise & Sunset with Twilight in December in Epping

Sunrise & Sunset with Twilight in December in EppingDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMNovJan5:37 AM5:37 AMDec 57:55 PMDec 57:55 PM5:47 AM5:47 AMDec 318:09 PMDec 318:09 PM5:41 AM5:41 AMDec 218:05 PMDec 218:05 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of December. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

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.

Solar Elevation and Azimuth in December in Epping

Solar Elevation and Azimuth in December in EppingDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNovJan001010202020303040405050506060707000010102020303030404050506060607070
northeastsouthwest
Solar elevation and azimuth over the course of December 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for December 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.

Moon Rise, Set & Phases in December in Epping

Moon Rise, Set & Phases in December in EppingDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNovJanNov 111:48 PMNov 111:48 PMNov 168:29 AMNov 168:29 AMDec 15:22 PMDec 15:22 PMDec 158:02 PMDec 158:02 PMDec 319:28 AMDec 319:28 AMJan 149:28 AMJan 149:28 AMJan 2911:37 PMJan 2911:37 PM5:26 AM5:26 AM7:13 PM7:13 PM6:59 PM6:59 PM5:26 AM5:26 AM5:03 AM5:03 AM8:06 PM8:06 PM8:14 PM8:14 PM5:49 AM5:49 AM5:26 AM5:26 AM8:47 PM8:47 PM7:57 PM7:57 PM5:42 AM5:42 AM5:21 AM5:21 AM8:08 PM8:08 PM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Dec 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
0%5:03 AMESE8:06 PMWSW-12:31 PMN246,621 mi
2
1%5:46 AMESE9:06 PMSW-1:25 PMN244,603 mi
3
4%6:38 AMSE10:02 PMSW-2:20 PMN242,497 mi
4
9%7:37 AMSE10:52 PMWSW-3:17 PMN240,358 mi
5
16%8:41 AMESE11:35 PMWSW-4:12 PMN238,214 mi
6
25%9:48 AMESE--5:04 PMN236,081 mi
7
35%-12:12 AMWSW10:56 AMESE5:54 PMN233,982 mi
8
46%-12:45 AMWSW12:03 PMESE6:41 PMN231,965 mi
9
50%-1:14 AMW1:09 PME7:28 PMN230,117 mi
10
70%-1:43 AMW2:16 PME8:15 PMN228,567 mi
11
80%-2:11 AMW3:25 PMENE9:04 PMN227,480 mi
12
89%-2:43 AMWNW4:36 PMENE9:57 PMN227,030 mi
13
95%-3:18 AMWNW5:50 PMENE10:55 PMN227,366 mi
14
99%-4:00 AMWNW7:04 PMENE11:57 PMN228,570 mi
15
100%-4:50 AMWNW8:14 PMNE--
16
100%-5:49 AMNW9:16 PMNE1:02 AMN230,624 mi
17
98%-6:54 AMNW10:08 PMENE2:05 AMN233,395 mi
18
94%-8:02 AMWNW10:50 PMENE3:05 AMN236,649 mi
19
87%-9:08 AMWNW11:25 PMENE3:59 AMN240,099 mi
20
79%-10:11 AMWNW11:54 PMENE4:48 AMN243,447 mi
21
70%-11:11 AMWNW-5:32 AMN246,424 mi
22
61%12:20 AME12:08 PMW-6:13 AMN248,809 mi
23
50%12:43 AME1:03 PMW-6:52 AMN250,448 mi
24
41%1:07 AME1:58 PMW-7:30 AMN251,253 mi
25
32%1:30 AMESE2:54 PMWSW-8:10 AMN251,206 mi
26
23%1:56 AMESE3:52 PMWSW-8:51 AMN250,359 mi
27
16%2:25 AMESE4:52 PMWSW-9:35 AMN248,821 mi
28
9%2:59 AMESE5:53 PMWSW-10:23 AMN246,747 mi
29
4%3:40 AMESE6:55 PMSW-11:15 AMN244,326 mi
30
1%4:29 AMSE7:53 PMSW-12:11 PMN241,760 mi
31
0%5:26 AMSE8:47 PMWSW-1:08 PMN239,242 mi

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 Epping is rapidly increasing during December, rising from 9% to 19% over the course of the month.

For reference, on February 6, the muggiest day of the year, there are muggy conditions 37% of the time, while on May 28, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in December in Epping

Humidity Comfort Levels in December in EppingDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%NovJanDec 19%Dec 19%Dec 3119%Dec 3119%Dec 1112%Dec 1112%Dec 2116%Dec 2116%muggymuggyhumidhumidcomfortablecomfortabledrydryoppressiveoppressive
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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 Epping is essentially constant during December, remaining within 0.1 miles per hour of 6.5 miles per hour throughout.

For reference, on August 1, the windiest day of the year, the daily average wind speed is 6.8 miles per hour, while on April 7, the calmest day of the year, the daily average wind speed is 6.0 miles per hour.

The lowest daily average wind speed during December is 6.4 miles per hour on December 9.

Average Wind Speed in December in Epping

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Epping throughout December is predominantly from the east, with a peak proportion of 41% on December 31.

Wind Direction in December in Epping

Wind Direction in December in EppingDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%NovJansoutheastnorthwest
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Epping 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 Epping is gradually increasing during December, rising by 3°F, from 69°F to 72°F, over the course of the month.

Average Water Temperature in December in Epping

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

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 Epping 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.

Time Spent in Various Temperature Bands and the Growing Season in December in Epping

Time Spent in Various Temperature Bands and the Growing Season in December in EppingDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%NovJan100%Dec 16100%Dec 16coolcomfortablewarmcoldhot
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
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

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 Epping are rapidly increasing during December, increasing by 594°F, from 1,489°F to 2,083°F, over the course of the month.

Growing Degree Days in December in Epping

Growing Degree Days in December in EppingDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031311,400°F1,400°F1,500°F1,500°F1,600°F1,600°F1,700°F1,700°F1,800°F1,800°F1,900°F1,900°F2,000°F2,000°F2,100°F2,100°F2,200°F2,200°F2,300°F2,300°FNovJanDec 11,489°FDec 11,489°FDec 312,083°FDec 312,083°FDec 111,678°FDec 111,678°FDec 211,876°FDec 211,876°F
The average growing degree days accumulated over the course of December, with 25th to 75th and 10th to 90th percentile bands.

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 Epping is essentially constant during December, remaining within 0.2 kWh of 7.5 kWh throughout.

The highest average daily incident shortwave solar energy during December is 7.7 kWh on December 30.

Average Daily Incident Shortwave Solar Energy in December in Epping

Average Daily Incident Shortwave Solar Energy in December in EppingDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhNovJanDec 307.7 kWhDec 307.7 kWhDec 17.3 kWhDec 17.3 kWhDec 117.5 kWhDec 117.5 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Epping are -33.773 deg latitude, 151.082 deg longitude, and 318 ft elevation.

The topography within 2 miles of Epping contains only modest variations in elevation, with a maximum elevation change of 390 feet and an average elevation above sea level of 310 feet. Within 10 miles contains only modest variations in elevation (853 feet). Within 50 miles contains very significant variations in elevation (3,747 feet).

The area within 2 miles of Epping is covered by artificial surfaces (53%) and trees (45%), within 10 miles by artificial surfaces (48%) and trees (41%), and within 50 miles by trees (49%) and water (39%).

This report illustrates the typical weather in Epping, 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 are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Epping.

For each station, the records are corrected for the elevation difference between that station and Epping according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Epping is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Epping and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Epping and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

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.

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