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September Weather in San Andrés Colombia

Daily high temperatures are around 86°F, rarely falling below 83°F or exceeding 88°F. The highest daily average high temperature is 86°F on September 18.

Daily low temperatures are around 80°F, rarely falling below 77°F or exceeding 82°F.

For reference, on September 11, the hottest day of the year, temperatures in San Andrés typically range from 80°F to 86°F, while on February 18, the coldest day of the year, they range from 78°F to 83°F.

Average High and Low Temperature in September in San Andrés

Average High and Low Temperature in September in San AndrésSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303076°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°F88°F88°F90°F90°F92°F92°F94°F94°F96°F96°F98°F98°F100°F100°FAugOctSep 1186°FSep 1186°F80°F80°FSep 186°FSep 186°F80°F80°FSep 3086°FSep 3086°F79°F79°FSep 2186°FSep 2186°F80°F80°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 San Andrés

Average Hourly Temperature in September in San AndrésSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOctwarmhothot
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.

Vailoatai, American Samoa (6,379 miles away); Casuguran, Philippines (9,943 miles); and Pandan, Philippines (10,089 miles) are the far-away foreign places with temperatures most similar to San Andrés (view comparison).

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The month of September in San Andrés experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 87% throughout the month. The highest chance of overcast or mostly cloudy conditions is 88% on September 16.

The clearest day of the month is September 2, with clear, mostly clear, or partly cloudy conditions 13% of the time.

For reference, on June 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 91%, while on January 4, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 69%.

Cloud Cover Categories in September in San Andrés

Cloud Cover Categories in September in San AndrésSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctJan 469%Jan 469%Sep 113%Sep 113%Sep 3013%Sep 3013%Sep 1112%Sep 1112%Sep 2113%Sep 2113%partly cloudymostly cloudyovercastclear
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 San Andrés, the chance of a wet day over the course of September is very rapidly increasing, starting the month at 56% and ending it at 67%.

For reference, the year's highest daily chance of a wet day is 68% on October 7, and its lowest chance is 0% on March 21.

Probability of Precipitation in September in San Andrés

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 San Andrés is rapidly increasing, starting the month at 4.4 inches, when it rarely exceeds 7.0 inches or falls below 1.9 inches, and ending the month at 6.3 inches, when it rarely exceeds 9.9 inches or falls below 3.3 inches.

Average Monthly Rainfall in September in San Andrés

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 San Andrés, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 20 minutes, implying an average daily decrease of 41 seconds, and weekly decrease of 4 minutes, 49 seconds.

The shortest day of the month is September 30, with 12 hours, 1 minute of daylight and the longest day is September 1, with 12 hours, 21 minutes of daylight.

Hours of Daylight and Twilight in September in San Andrés

Hours of Daylight and Twilight in September in San AndrésSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 7 minSep 2212 hr, 7 minnightnightdaydaySep 112 hr, 21 minSep 112 hr, 21 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 San Andrés is 6:16 AM on September 5 and the earliest sunrise is 8 seconds earlier at 6:15 AM on September 24.

The latest sunset is 6:36 PM on September 1 and the earliest sunset is 20 minutes earlier at 6:16 PM on September 30.

Daylight saving time is not observed in San Andrés during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 6:02 AM and sets 12 hours, 52 minutes later, at 6:54 PM, while on December 21, the shortest day of the year, it rises at 6:43 AM and sets 11 hours, 23 minutes later, at 6:06 PM.

Sunrise & Sunset with Twilight in September in San Andrés

Sunrise & Sunset with Twilight in September in San AndrésSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMAugOct6:15 AM6:15 AMSep 246:21 PMSep 246:21 PM6:16 AM6:16 AMSep 16:36 PMSep 16:36 PM6:16 AM6:16 AMSep 116:30 PMSep 116:30 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 San Andrés

Solar Elevation and Azimuth in September in San AndrésSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOct0010102020203030404050505060607070808000010102020303030404050506060607080
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 San Andrés

Moon Rise, Set & Phases in September in San AndrésSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctAug 46:14 AMAug 46:14 AMAug 191:26 PMAug 191:26 PMSep 28:56 PMSep 28:56 PMSep 179:35 PMSep 179:35 PMOct 21:50 PMOct 21:50 PMOct 176:27 AMOct 176:27 AM6:18 AM6:18 AM7:19 PM7:19 PM6:59 PM6:59 PM7:02 AM7:02 AM5:52 AM5:52 AM6:34 PM6:34 PM6:18 PM6:18 PM6:41 AM6:41 AM6:05 AM6:05 AM6:17 PM6:17 PM5:35 PM5:35 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%5:04 AMENE5:58 PMWNW-11:33 AMN249,161 mi
2
0%5:52 AMENE6:34 PMW-12:15 PMS250,561 mi
3
0%6:38 AME7:09 PMW-12:55 PMS251,599 mi
4
3%7:23 AME7:42 PMW-1:33 PMS252,233 mi
5
7%8:07 AME8:16 PMW-2:11 PMS252,399 mi
6
12%8:52 AME8:51 PMWSW-2:51 PMS252,021 mi
7
19%9:38 AMESE9:28 PMWSW-3:32 PMS251,026 mi
8
28%10:26 AMESE10:08 PMWSW-4:16 PMS249,357 mi
9
37%11:17 AMESE10:53 PMWSW-5:04 PMS246,992 mi
10
47%12:12 PMESE11:43 PMWSW-5:57 PMS243,964 mi
11
50%1:08 PMESE--6:53 PMS240,377 mi
12
68%-12:39 AMWSW2:06 PMESE7:52 PMS236,422 mi
13
78%-1:38 AMWSW3:02 PMESE8:52 PMS232,373 mi
14
87%-2:40 AMWSW3:56 PMESE9:50 PMS228,571 mi
15
94%-3:42 AMWSW4:46 PMESE10:45 PMS225,381 mi
16
99%-4:43 AMWSW5:33 PME11:38 PMS223,134 mi
17
100%-5:42 AMW6:18 PME--
18
100%-6:41 AMW7:03 PME12:29 AMS222,074 mi
19
98%-7:40 AMW7:48 PMENE1:20 AMS222,307 mi
20
93%-8:39 AMWNW8:36 PMENE2:12 AMN223,782 mi
21
85%-9:40 AMWNW9:26 PMENE3:06 AMN226,307 mi
22
76%-10:43 AMWNW10:21 PMENE4:03 AMN229,585 mi
23
65%-11:45 AMWNW11:18 PMENE5:02 AMN233,277 mi
24
50%-12:46 PMWNW-6:02 AMN237,056 mi
25
42%12:16 AMENE1:42 PMWNW-7:00 AMN240,651 mi
26
32%1:14 AMENE2:32 PMWNW-7:55 AMN243,870 mi
27
23%2:09 AMENE3:18 PMWNW-8:45 AMN246,602 mi
28
15%3:01 AMENE3:58 PMWNW-9:31 AMN248,803 mi
29
9%3:50 AMENE4:35 PMWNW-10:14 AMN250,472 mi
30
4%4:36 AME5:10 PMW-10:54 AMS251,639 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 San Andrés is essentially constant during September, remaining around 100% throughout.

For reference, on April 4, the muggiest day of the year, there are muggy conditions 100% of the time, while on February 26, the least muggy day of the year, there are muggy conditions 100% of the time.

Humidity Comfort Levels in September in San Andrés

Humidity Comfort Levels in September in San AndrésSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOctSep 16100%Sep 16100%Sep 1100%Sep 1100%Sep 30100%Sep 30100%miserablemiserableoppressiveoppressive
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 San Andrés is decreasing during September, decreasing from 12.0 miles per hour to 10.5 miles per hour over the course of the month.

For reference, on January 3, the windiest day of the year, the daily average wind speed is 18.2 miles per hour, while on October 1, the calmest day of the year, the daily average wind speed is 10.5 miles per hour.

Average Wind Speed in September in San Andrés

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 San Andrés throughout September is predominantly from the east, with a peak proportion of 84% on September 1.

Wind Direction in September in San Andrés

Wind Direction in September in San AndrésSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%AugOcteastnorthsouthwest
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).

San Andrés 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 San Andrés is essentially constant during September, remaining around 84°F throughout.

The highest average surface water temperature during September is 84°F on September 25.

Average Water Temperature in September in San Andrés

Average Water Temperature in September in San AndrésSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303081.0°F81.0°F81.5°F81.5°F82.0°F82.0°F82.5°F82.5°F83.0°F83.0°F83.5°F83.5°F84.0°F84.0°F84.5°F84.5°F85.0°F85.0°F85.5°F85.5°FAugOctSep 2584°FSep 2584°FSep 183°FSep 183°FSep 1184°FSep 1184°F
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 San Andrés 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 San Andrés

Time Spent in Various Temperature Bands and the Growing Season in September in San AndrésSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%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 16warmhot
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 San Andrés are very rapidly increasing during September, increasing by 943°F, from 7,718°F to 8,662°F, over the course of the month.

Growing Degree Days in September in San Andrés

Growing Degree Days in September in San AndrésSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930307,600°F7,600°F7,800°F7,800°F8,000°F8,000°F8,200°F8,200°F8,400°F8,400°F8,600°F8,600°F8,800°F8,800°FAugOctSep 17,718°FSep 17,718°FSep 308,662°FSep 308,662°FSep 118,050°FSep 118,050°FSep 218,374°FSep 218,374°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 San Andrés is essentially constant during September, remaining within 0.2 kWh of 4.0 kWh throughout.

The lowest average daily incident shortwave solar energy during September is 3.9 kWh on September 29.

Average Daily Incident Shortwave Solar Energy in September in San Andrés

Average Daily Incident Shortwave Solar Energy in September in San AndrésSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWhAugOctSep 293.9 kWhSep 293.9 kWhSep 14.2 kWhSep 14.2 kWhSep 114.0 kWhSep 114.0 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 San Andrés are 12.585 deg latitude, -81.701 deg longitude, and 10 ft elevation.

The topography within 2 miles of San Andrés contains only modest variations in elevation, with a maximum elevation change of 302 feet and an average elevation above sea level of 13 feet. Within 10 miles also contains only modest variations in elevation (348 feet). Within 50 miles also contains only modest variations in elevation (328 feet).

The area within 2 miles of San Andrés is covered by water (82%), within 10 miles by water (98%), and within 50 miles by water (100%).

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

At a distance of 1 kilometer from San Andrés, 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 San Andrés 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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