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September Weather in Merimbula New South Wales, Australia

Daily high temperatures increase by 4°F, from 63°F to 66°F, rarely falling below 57°F or exceeding 74°F.

Daily low temperatures increase by 3°F, from 50°F to 53°F, rarely falling below 45°F or exceeding 59°F.

For reference, on January 25, the hottest day of the year, temperatures in Merimbula typically range from 64°F to 76°F, while on July 19, the coldest day of the year, they range from 48°F to 59°F.

Average High and Low Temperature in September in Merimbula

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 September. 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 September in Merimbula

Average Hourly Temperature in September in MerimbulaSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOctNowNowcoldcoldcoolcomfortable
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.

Cape Town, Western Cape, South Africa (6,641 miles away) is the far-away foreign place with temperatures most similar to Merimbula (view comparison).

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The month of September in Merimbula experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 31% throughout the month.

The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 71% of the time.

For reference, on November 27, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 42%, while on August 10, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 73%.

Cloud Cover Categories in September in Merimbula

Cloud Cover Categories in September in MerimbulaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctSep 171%Sep 171%Sep 3068%Sep 3068%Sep 1169%Sep 1169%Sep 2168%Sep 2168%NowNowclearmostly 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 Merimbula, the chance of a wet day over the course of September is gradually increasing, starting the month at 19% and ending it at 22%.

For reference, the year's highest daily chance of a wet day is 29% on November 20, and its lowest chance is 14% on July 28.

Probability of Precipitation in September in Merimbula

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 September in Merimbula is essentially constant, remaining about 1.8 inches throughout, and rarely exceeding 3.9 inches or falling below 0.3 inches.

Average Monthly Rainfall in September in Merimbula

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 September in Merimbula, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 7 minutes, implying an average daily increase of 2 minutes, 18 seconds, and weekly increase of 16 minutes, 9 seconds.

The shortest day of the month is September 1, with 11 hours, 19 minutes of daylight and the longest day is September 30, with 12 hours, 26 minutes of daylight.

Hours of Daylight and Twilight in September in Merimbula

Hours of Daylight and Twilight in September in MerimbulaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 7 minSep 2212 hr, 7 mindaydaydaydaynightSep 111 hr, 19 minSep 111 hr, 19 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 latest sunrise of the month in Merimbula is 6:21 AM on September 1 and the earliest sunrise is 43 minutes earlier at 5:37 AM on September 30.

The earliest sunset is 5:40 PM on September 1 and the latest sunset is 23 minutes later at 6:03 PM on September 30.

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

For reference, on December 21, the longest day of the year, the Sun rises at 5:37 AM and sets 14 hours, 42 minutes later, at 8:19 PM, while on June 20, the shortest day of the year, it rises at 7:13 AM and sets 9 hours, 38 minutes later, at 4:50 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in September in Merimbula

Sunrise & Sunset with Twilight and Daylight Saving Time in September in MerimbulaSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMAugOct5:37 AM5:37 AMSep 306:03 PMSep 306:03 PM6:21 AM6:21 AMSep 15:40 PMSep 15:40 PM6:06 AM6:06 AMSep 115:48 PMSep 115:48 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of September. 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 September in Merimbula

Solar Elevation and Azimuth in September in MerimbulaSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOct001010202020303040405050600001010202030303040405060NowNow
northeastsouthwest
Solar elevation and azimuth over the course of September 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 September 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 September in Merimbula

Moon Rise, Set & Phases in September in MerimbulaSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctAug 49:14 PMAug 49:14 PMAug 204:26 AMAug 204:26 AMSep 311:56 AMSep 311:56 AMSep 1812:35 PMSep 1812:35 PMOct 34:50 AMOct 34:50 AMOct 1710:27 PMOct 1710:27 PM6:59 AM6:59 AM4:53 PM4:53 PM4:44 PM4:44 PM7:00 AM7:00 AM6:26 AM6:26 AM5:47 PM5:47 PM6:04 PM6:04 PM6:24 AM6:24 AM5:36 AM5:36 AM6:33 PM6:33 PM7:06 PM7:06 PM6:19 AM6:19 AM
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.
Sep 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
4%5:34 AMENE3:47 PMWNW-10:40 AMN248,086 mi
2
1%6:02 AMENE4:48 PMWNW-11:25 AMN249,703 mi
3
0%6:26 AMENE5:47 PMW-12:06 PMN250,977 mi
4
1%6:49 AME6:45 PMW-12:46 PMN251,877 mi
5
4%7:10 AME7:42 PMW-1:24 PMN252,350 mi
6
8%7:31 AME8:39 PMWSW-2:02 PMN252,329 mi
7
15%7:53 AMESE9:38 PMWSW-2:42 PMN251,738 mi
8
22%8:17 AMESE10:38 PMWSW-3:24 PMN250,507 mi
9
31%8:46 AMESE11:40 PMWSW-4:09 PMN248,590 mi
10
40%9:20 AMESE--4:58 PMN245,981 mi
11
50%-12:43 AMSW10:01 AMSE5:51 PMN242,739 mi
12
61%-1:45 AMSW10:53 AMSE6:48 PMN238,997 mi
13
72%-2:42 AMSW11:53 AMSE7:46 PMN234,976 mi
14
82%-3:33 AMSW1:02 PMESE8:44 PMN230,976 mi
15
90%-4:17 AMWSW2:17 PMESE9:40 PMN227,353 mi
16
96%-4:54 AMWSW3:33 PMESE10:34 PMN224,463 mi
17
100%-5:26 AMWSW4:48 PME11:25 PMN222,615 mi
18
100%-5:56 AMW6:04 PME--
19
100%-6:24 AMW7:19 PME12:16 AMN222,008 mi
20
97%-6:53 AMWNW8:35 PMENE1:07 AMN222,693 mi
21
90%-7:24 AMWNW9:52 PMENE2:00 AMN224,569 mi
22
82%-8:00 AMWNW11:07 PMENE2:56 AMN227,400 mi
23
72%-8:43 AMWNW-3:55 AMN230,866 mi
24
61%12:19 AMNE9:33 AMNW-4:56 AMN234,628 mi
25
50%1:22 AMNE10:30 AMNW-5:56 AMN238,371 mi
26
39%2:16 AMNE11:32 AMNW-6:55 AMN241,852 mi
27
29%3:01 AMENE12:36 PMWNW-7:49 AMN244,908 mi
28
20%3:37 AMENE1:40 PMWNW-8:38 AMN247,453 mi
29
13%4:06 AMENE2:42 PMWNW-9:24 AMN249,462 mi
30
7%4:32 AMENE3:41 PMWNW-10:06 AMN250,947 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 Merimbula is essentially constant during September, remaining around 0% throughout.

For reference, on February 7, the muggiest day of the year, there are muggy conditions 17% of the time, while on May 25, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in September in Merimbula

Humidity Comfort Levels in September in MerimbulaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOctSep 10%Sep 10%Sep 300%Sep 300%Sep 110%Sep 110%Sep 210%Sep 210%NowNowcomfortablecomfortabledrydryhumidhumid
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 Merimbula is essentially constant during September, remaining within 0.1 miles per hour of 7.3 miles per hour throughout.

For reference, on June 24, the windiest day of the year, the daily average wind speed is 7.8 miles per hour, while on April 30, the calmest day of the year, the daily average wind speed is 7.0 miles per hour.

The lowest daily average wind speed during September is 7.2 miles per hour on September 25.

Average Wind Speed in September in Merimbula

Average Wind Speed in September in MerimbulaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphAugOctSep 257.2 mphSep 257.2 mphSep 17.4 mphSep 17.4 mphSep 117.3 mphSep 117.3 mphNowNow
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 Merimbula throughout September is predominantly from the west, with a peak proportion of 42% on September 1.

Wind Direction in September in Merimbula

Wind Direction in September in MerimbulaWNSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%AugOctNowNowwestsouthnortheast
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).

Merimbula 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 Merimbula is essentially constant during September, remaining around 60°F throughout.

Average Water Temperature in September in Merimbula

Average Water Temperature in September in MerimbulaSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303057°F57°F58°F58°F59°F59°F60°F60°F61°F61°F62°F62°F63°F63°F64°F64°F65°F65°FAugOctSep 160°FSep 160°FSep 3061°FSep 3061°FSep 1160°FSep 1160°FSep 2160°FSep 2160°FNowNow
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 Merimbula 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 September in Merimbula

Time Spent in Various Temperature Bands and the Growing Season in September in MerimbulaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOct100%Sep 16100%Sep 16NowNowcoldcoolcomfortablevery coldwarm
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 Merimbula are increasing during September, increasing by 231°F, from 284°F to 514°F, over the course of the month.

Growing Degree Days in September in Merimbula

Growing Degree Days in September in MerimbulaSep112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030250°F250°F300°F300°F350°F350°F400°F400°F450°F450°F500°F500°F550°F550°F600°F600°FAugOctSep 1284°FSep 1284°FSep 30514°FSep 30514°FSep 11353°FSep 11353°FSep 21434°FSep 21434°FNowNow
The average growing degree days accumulated over the course of September, 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 Merimbula is increasing during September, rising by 1.3 kWh, from 4.2 kWh to 5.5 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in September in Merimbula

Average Daily Incident Shortwave Solar Energy in September in MerimbulaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhAugOctSep 14.2 kWhSep 14.2 kWhSep 305.5 kWhSep 305.5 kWhSep 114.6 kWhSep 114.6 kWhNowNow
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 Merimbula are -36.889 deg latitude, 149.910 deg longitude, and 13 ft elevation.

The topography within 2 miles of Merimbula contains significant variations in elevation, with a maximum elevation change of 686 feet and an average elevation above sea level of 112 feet. Within 10 miles contains significant variations in elevation (2,201 feet). Within 50 miles contains large variations in elevation (4,409 feet).

The area within 2 miles of Merimbula is covered by trees (45%) and water (36%), within 10 miles by trees (49%) and water (42%), and within 50 miles by water (45%) and trees (42%).

This report illustrates the typical weather in Merimbula, 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, Canberra International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Merimbula.

At a distance of 187 kilometers from Merimbula, further than our threshold of 150 kilometers, this station is deemed insufficiently nearby to be relied upon as our primary source for temperature and dew point records. Consequently, the station records are blended with interpolated values from NASA's MERRA-2 satellite-era reanalysis , and both are corrected for elevation differences according to the International Standard Atmosphere .

The weight assigned to the MERRA-2 value depends on the distance from Merimbula to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 43%, making the weight assigned to the weather station 57%.

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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