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September Weather in Arias Argentina

Daily high temperatures increase by 4°F, from 67°F to 71°F, rarely falling below 55°F or exceeding 81°F.

Daily low temperatures increase by 5°F, from 44°F to 50°F, rarely falling below 35°F or exceeding 58°F.

For reference, on January 8, the hottest day of the year, temperatures in Arias typically range from 65°F to 85°F, while on July 20, the coldest day of the year, they range from 39°F to 60°F.

Average High and Low Temperature in September in Arias

Average High and Low Temperature in September in AriasSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303030°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°FAugOctSep 167°FSep 167°F44°F44°FSep 3071°FSep 3071°F50°F50°FSep 1168°FSep 1168°F46°F46°FSep 2169°FSep 2169°F47°F47°F
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 Arias

Average Hourly Temperature in September in AriasSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOctvery coldcoldcoldcoolcomfortable
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.

Dungog, Australia (7,370 miles away) is the far-away foreign place with temperatures most similar to Arias (view comparison).

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The month of September in Arias experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 36% throughout the month.

The clearest day of the month is September 29, with clear, mostly clear, or partly cloudy conditions 65% of the time.

For reference, on May 30, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 48%, while on February 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 75%.

Cloud Cover Categories in September in Arias

Cloud Cover Categories in September in AriasSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctSep 164%Sep 164%Sep 3065%Sep 3065%Sep 1165%Sep 1165%Sep 2165%Sep 2165%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 Arias, the chance of a wet day over the course of September is very rapidly increasing, starting the month at 12% and ending it at 23%.

For reference, the year's highest daily chance of a wet day is 38% on December 3, and its lowest chance is 7% on July 30.

Probability of Precipitation in September in Arias

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 Arias is rapidly increasing, starting the month at 1.3 inches, when it rarely exceeds 3.0 inches or falls below 0.1 inches, and ending the month at 2.7 inches, when it rarely exceeds 4.9 inches or falls below 1.1 inches.

Average Monthly Rainfall in September in Arias

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 Arias, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 59 minutes, implying an average daily increase of 2 minutes, 3 seconds, and weekly increase of 14 minutes, 19 seconds.

The shortest day of the month is September 1, with 11 hours, 25 minutes of daylight and the longest day is September 30, with 12 hours, 25 minutes of daylight.

Hours of Daylight and Twilight in September in Arias

Hours of Daylight and Twilight in September in AriasSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 6 minSep 2212 hr, 6 mindaydaydaydaynightSep 111 hr, 25 minSep 111 hr, 25 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 Arias is 7:26 AM on September 1 and the earliest sunrise is 40 minutes earlier at 6:47 AM on September 30.

The earliest sunset is 6:52 PM on September 1 and the latest sunset is 20 minutes later at 7:12 PM on September 30.

Daylight saving time is not observed in Arias during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 5:56 AM and sets 14 hours, 24 minutes later, at 8:19 PM, while on June 20, the shortest day of the year, it rises at 8:13 AM and sets 9 hours, 55 minutes later, at 6:08 PM.

Sunrise & Sunset with Twilight in September in Arias

Sunrise & Sunset with Twilight in September in AriasSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMAugOct6:47 AM6:47 AMSep 307:12 PMSep 307:12 PM7:26 AM7:26 AMSep 16:52 PMSep 16:52 PM7:13 AM7:13 AMSep 116:58 PMSep 116:58 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
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 Arias

Solar Elevation and Azimuth in September in AriasSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOct001010202020303040405050600001010202030303040405060
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 Arias

Moon Rise, Set & Phases in September in AriasSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctAug 48:14 AMAug 48:14 AMAug 193:26 PMAug 193:26 PMSep 210:56 PMSep 210:56 PMSep 1711:35 PMSep 1711:35 PMOct 23:50 PMOct 23:50 PMOct 178:27 AMOct 178:27 AM8:20 AM8:20 AM6:47 PM6:47 PM6:44 PM6:44 PM8:23 AM8:23 AM7:21 AM7:21 AM6:36 PM6:36 PM6:44 PM6:44 PM7:22 AM7:22 AM6:38 AM6:38 AM7:17 PM7:17 PM6:41 PM6:41 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
2%6:53 AMENE5:39 PMWNW-12:16 PMN249,080 mi
2
0%7:21 AMENE6:36 PMWNW-12:59 PMN250,497 mi
3
0%7:46 AME7:32 PMW-1:39 PMN251,556 mi
4
2%8:10 AME8:27 PMW-2:17 PMN252,211 mi
5
6%8:33 AME9:22 PMW-2:55 PMN252,403 mi
6
12%8:56 AMESE10:18 PMWSW-3:35 PMN252,055 mi
7
19%9:22 AMESE11:15 PMWSW-4:15 PMN251,094 mi
8
27%9:50 AMESE--4:59 PMN249,461 mi
9
36%-12:15 AMWSW10:24 AMESE5:47 PMN247,133 mi
10
47%-1:16 AMWSW11:03 AMESE6:38 PMN244,139 mi
11
50%-2:17 AMSW11:51 AMSE7:33 PMN240,580 mi
12
68%-3:17 AMSW12:48 PMSE8:31 PMN236,641 mi
13
78%-4:11 AMSW1:54 PMESE9:30 PMN232,592 mi
14
87%-4:59 AMWSW3:04 PMESE10:27 PMN228,770 mi
15
94%-5:41 AMWSW4:17 PMESE11:21 PMN225,537 mi
16
97%-6:18 AMWSW5:31 PMESE--
17
100%-6:51 AMW6:44 PME12:14 AMN223,231 mi
18
100%-7:22 AMW7:56 PME1:05 AMN222,100 mi
19
98%-7:53 AMW9:09 PMENE1:56 AMN222,259 mi
20
93%-8:25 AMWNW10:23 PMENE2:48 AMN223,669 mi
21
86%-9:02 AMWNW11:37 PMENE3:42 AMN226,143 mi
22
76%-9:44 AMWNW-4:40 AMN229,390 mi
23
65%12:48 AMENE10:32 AMNW-5:40 AMN233,071 mi
24
50%1:55 AMNE11:27 AMNW-6:41 AMN236,855 mi
25
43%2:53 AMNE12:27 PMNW-7:40 AMN240,468 mi
26
33%3:42 AMENE1:30 PMWNW-8:36 AMN243,713 mi
27
23%4:23 AMENE2:32 PMWNW-9:28 AMN246,473 mi
28
15%4:57 AMENE3:32 PMWNW-10:15 AMN248,702 mi
29
9%5:26 AMENE4:31 PMWNW-10:58 AMN250,399 mi
30
4%5:51 AME5:27 PMW-11:38 AMN251,591 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 Arias is essentially constant during September, remaining within 1% of 2% throughout.

For reference, on January 15, the muggiest day of the year, there are muggy conditions 40% of the time, while on July 16, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in September in Arias

Humidity Comfort Levels in September in AriasSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOctSep 11%Sep 11%Sep 302%Sep 302%Sep 111%Sep 111%Sep 211%Sep 211%humidhumidcomfortablecomfortabledrydrymuggymuggy
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 Arias is essentially constant during September, remaining within 0.1 miles per hour of 9.3 miles per hour throughout.

For reference, on September 30, the windiest day of the year, the daily average wind speed is 9.4 miles per hour, while on February 29, the calmest day of the year, the daily average wind speed is 7.5 miles per hour.

The highest daily average wind speed during September is 9.4 miles per hour on September 30.

Average Wind Speed in September in Arias

Average Wind Speed in September in AriasSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphAugOctSep 309.4 mphSep 309.4 mphSep 19.1 mphSep 19.1 mphSep 119.3 mphSep 119.3 mph
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 Arias throughout September is predominantly from the north, with a peak proportion of 39% on September 1.

Wind Direction in September in Arias

Wind Direction in September in AriasSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%AugOctsoutheastnorthwest
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).

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 Arias typically lasts for 9.5 months (289 days), from around August 22 to around June 7, rarely starting before July 27 or after September 14, and rarely ending before May 14 or after July 1.

The month of September in Arias is very likely fully outside of the growing season, with the chance that a given day is in the growing season rapidly increasing from 70% to 100% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in September in Arias

Time Spent in Various Temperature Bands and the Growing Season in September in AriasSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOct70%Sep 170%Sep 1100%Sep 30100%Sep 3087%Sep 1187%Sep 1196%Sep 2196%Sep 2150%Aug 2250%Aug 22very coldcoldcoolcomfortablewarmfreezing
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 Arias are increasing during September, increasing by 243°F, from 277°F to 520°F, over the course of the month.

Growing Degree Days in September in Arias

Growing Degree Days in September in AriasSep112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030250°F250°F300°F300°F350°F350°F400°F400°F450°F450°F500°F500°F550°F550°F600°F600°FAugOctSep 1277°FSep 1277°FSep 30520°FSep 30520°FSep 11352°FSep 11352°FSep 21435°FSep 21435°F
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 Arias is increasing during September, rising by 1.1 kWh, from 4.5 kWh to 5.6 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in September in Arias

Average Daily Incident Shortwave Solar Energy in September in AriasSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhAugOctSep 14.5 kWhSep 14.5 kWhSep 305.6 kWhSep 305.6 kWhSep 114.9 kWhSep 114.9 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 Arias are -33.644 deg latitude, -62.403 deg longitude, and 417 ft elevation.

The topography within 2 miles of Arias is essentially flat, with a maximum elevation change of 69 feet and an average elevation above sea level of 403 feet. Within 10 miles is essentially flat (148 feet). Within 50 miles also contains only modest variations in elevation (289 feet).

The area within 2 miles of Arias is covered by cropland (72%) and trees (10%), within 10 miles by cropland (80%), and within 50 miles by cropland (76%).

This report illustrates the typical weather in Arias, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Arias.

For each station, the records are corrected for the elevation difference between that station and Arias 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 Arias is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Arias 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 Arias 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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