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September Weather in Arandis Namibia

Daily high temperatures increase by 2°F, from 76°F to 79°F, rarely falling below 64°F or exceeding 91°F.

Daily low temperatures increase by 3°F, from 49°F to 52°F, rarely falling below 41°F or exceeding 61°F.

For reference, on April 1, the hottest day of the year, temperatures in Arandis typically range from 59°F to 84°F, while on August 3, the coldest day of the year, they range from 47°F to 76°F.

Average High and Low Temperature in September in Arandis

Average High and Low Temperature in September in ArandisSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303035°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°FAugOctSep 176°FSep 176°F49°F49°FSep 3079°FSep 3079°F52°F52°FSep 1177°FSep 1177°F50°F50°FSep 2178°FSep 2178°F51°F51°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 Arandis

Average Hourly Temperature in September in ArandisSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOctcoldcoldcoolcoolcomfortablewarmwarm
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.

Mascota, Mexico (8,597 miles away); Tonalapa, Mexico (8,192 miles); and Aguacatán, Guatemala (7,646 miles) are the far-away foreign places with temperatures most similar to Arandis (view comparison).

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The month of September in Arandis experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 11% throughout the month.

The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 90% of the time.

For reference, on January 30, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 35%, while on May 16, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 93%.

Cloud Cover Categories in September in Arandis

Cloud Cover Categories in September in ArandisSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctSep 190%Sep 190%Sep 3088%Sep 3088%Sep 1189%Sep 1189%Sep 2189%Sep 2189%clearmostly clearovercastpartly cloudy
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.

Over the course of September in Arandis, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 37 minutes, implying an average daily increase of 1 minute, 16 seconds, and weekly increase of 8 minutes, 52 seconds.

The shortest day of the month is September 1, with 11 hours, 41 minutes of daylight and the longest day is September 30, with 12 hours, 17 minutes of daylight.

Hours of Daylight and Twilight in September in Arandis

Hours of Daylight and Twilight in September in ArandisSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 7 minSep 2212 hr, 7 mindaydaydaydaynightSep 111 hr, 41 minSep 111 hr, 41 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 Arandis is 7:09 AM on September 1 and the earliest sunrise is 28 minutes earlier at 6:41 AM on September 30.

The earliest sunset is 6:50 PM on September 1 and the latest sunset is 8 minutes later at 6:58 PM on September 30.

Daylight saving time is not observed in Arandis during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 6:13 AM and sets 13 hours, 31 minutes later, at 7:43 PM, while on June 20, the shortest day of the year, it rises at 7:39 AM and sets 10 hours, 46 minutes later, at 6:24 PM.

Sunrise & Sunset with Twilight in September in Arandis

Sunrise & Sunset with Twilight in September in ArandisSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMAugOct6:41 AM6:41 AMSep 306:58 PMSep 306:58 PM7:09 AM7:09 AMSep 16:50 PMSep 16:50 PM7:00 AM7:00 AMSep 116:53 PMSep 116:53 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 Arandis

Solar Elevation and Azimuth in September in ArandisSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOct001010202020303040405050506070800001010202030303040405050606070
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 Arandis

Moon Rise, Set & Phases in September in ArandisSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctAug 41:14 PMAug 41:14 PMAug 198:26 PMAug 198:26 PMSep 33:56 AMSep 33:56 AMSep 184:35 AMSep 184:35 AMOct 28:50 PMOct 28:50 PMOct 171:27 PMOct 171:27 PM7:38 AM7:38 AM6:47 PM6:47 PM6:37 PM6:37 PM7:54 AM7:54 AM7:23 AM7:23 AM7:17 PM7:17 PM6:25 PM6:25 PM7:04 AM7:04 AM6:24 AM6:24 AM6:51 PM6:51 PM7:16 PM7:16 PM6:54 AM6:54 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
3%6:16 AMENE5:35 PMWNW-11:56 AMN248,730 mi
2
0%6:51 AMENE6:27 PMWNW-12:39 PMN250,221 mi
3
0%7:23 AME7:17 PMW-1:20 PMN251,360 mi
4
2%7:52 AME8:06 PMW-1:59 PMN252,107 mi
5
5%8:21 AME8:55 PMW-2:37 PMN252,404 mi
6
11%8:50 AME9:44 PMWSW-3:16 PMN252,179 mi
7
17%9:21 AMESE10:35 PMWSW-3:56 PMN251,356 mi
8
25%9:55 AMESE11:28 PMWSW-4:39 PMN249,871 mi
9
34%10:32 AMESE--5:26 PMS247,692 mi
10
44%-12:24 AMWSW11:15 AMESE6:17 PMS244,836 mi
11
50%-1:22 AMWSW12:05 PMESE7:12 PMS241,385 mi
12
65%-2:20 AMWSW1:01 PMESE8:09 PMS237,507 mi
13
76%-3:17 AMWSW2:02 PMESE9:08 PMS233,454 mi
14
85%-4:10 AMWSW3:07 PMESE10:06 PMS229,552 mi
15
93%-4:59 AMWSW4:14 PMESE11:01 PMN226,163 mi
16
98%-5:43 AMWSW5:20 PMESE11:54 PMN223,633 mi
17
99%-6:25 AMW6:25 PME--
18
100%-7:04 AMW7:29 PME12:46 AMN222,235 mi
19
99%-7:42 AMW8:34 PME1:37 AMN222,116 mi
20
95%-8:22 AMWNW9:40 PMENE2:28 AMN223,269 mi
21
88%-9:05 AMWNW10:47 PMENE3:22 AMN225,537 mi
22
78%-9:52 AMWNW11:53 PMENE4:19 AMN228,645 mi
23
68%-10:44 AMWNW-5:18 AMN232,261 mi
24
50%12:58 AMENE11:40 AMWNW-6:18 AMN236,048 mi
25
45%1:57 AMENE12:38 PMWNW-7:18 AMN239,717 mi
26
35%2:51 AMENE1:38 PMWNW-8:15 AMN243,053 mi
27
25%3:37 AMENE2:35 PMWNW-9:07 AMN245,923 mi
28
17%4:18 AMENE3:31 PMWNW-9:55 AMN248,267 mi
29
10%4:53 AMENE4:23 PMWNW-10:38 AMN250,077 mi
30
5%5:25 AMENE5:14 PMW-11:19 AMN251,375 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 Arandis is essentially constant during September, remaining around 0% throughout.

For reference, on February 20, the muggiest day of the year, there are muggy conditions 2% of the time, while on May 24, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in September in Arandis

Humidity Comfort Levels in September in ArandisSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%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%drydrycomfortablecomfortable
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 Arandis is essentially constant during September, remaining within 0.1 miles per hour of 8.2 miles per hour throughout.

For reference, on July 3, the windiest day of the year, the daily average wind speed is 10.7 miles per hour, while on March 12, the calmest day of the year, the daily average wind speed is 7.1 miles per hour.

Average Wind Speed in September in Arandis

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

The wind direction in Arandis during September is predominantly out of the east from September 1 to September 9 and the south from September 9 to September 30.

Wind Direction in September in Arandis

Wind Direction in September in ArandisESWSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%AugOctwesteastsouthnorth
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).

Arandis 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 Arandis is essentially constant during September, remaining around 57°F throughout.

Average Water Temperature in September in Arandis

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 Arandis 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 Arandis

Time Spent in Various Temperature Bands and the Growing Season in September in ArandisSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOct97%Sep 197%Sep 199%Sep 3099%Sep 3098%Sep 1198%Sep 1199%Sep 2199%Sep 21very coldcoldcoolcomfortablewarmhot
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 Arandis are increasing during September, increasing by 361°F, from 680°F to 1,041°F, over the course of the month.

Growing Degree Days in September in Arandis

Growing Degree Days in September in ArandisSep112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030600°F600°F700°F700°F800°F800°F900°F900°F1,000°F1,000°F1,100°F1,100°F1,200°F1,200°FAugOctSep 1680°FSep 1680°FSep 301,041°FSep 301,041°FSep 11796°FSep 11796°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 Arandis is gradually increasing during September, rising by 1.0 kWh, from 6.3 kWh to 7.3 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in September in Arandis

Average Daily Incident Shortwave Solar Energy in September in ArandisSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhAugOctSep 16.3 kWhSep 16.3 kWhSep 307.3 kWhSep 307.3 kWhSep 116.6 kWhSep 116.6 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 Arandis are -22.417 deg latitude, 14.967 deg longitude, and 1,870 ft elevation.

The topography within 2 miles of Arandis contains only modest variations in elevation, with a maximum elevation change of 282 feet and an average elevation above sea level of 1,880 feet. Within 10 miles contains only modest variations in elevation (1,663 feet). Within 50 miles contains very significant variations in elevation (6,335 feet).

The area within 2 miles of Arandis is covered by bare soil (99%), within 10 miles by bare soil (74%) and sparse vegetation (15%), and within 50 miles by bare soil (70%) and grassland (14%).

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

At a distance of 71 kilometers from Arandis, 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 Arandis 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.

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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