1. WeatherSpark.com
  2. Mexico
  3. Chiapas
  4. Ixtacomitán

September Weather in Ixtacomitán Mexico

Daily high temperatures decrease by 2°F, from 89°F to 87°F, rarely falling below 82°F or exceeding 93°F.

Daily low temperatures are around 74°F, rarely falling below 71°F or exceeding 76°F. The highest daily average low temperature is 74°F on September 11.

For reference, on May 9, the hottest day of the year, temperatures in Ixtacomitán typically range from 75°F to 93°F, while on January 18, the coldest day of the year, they range from 66°F to 80°F.

Average High and Low Temperature in September in Ixtacomitán

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 Ixtacomitán

Average Hourly Temperature in September in IxtacomitánSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOctcomfortablewarmwarmhot
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.

Manga, Philippines (9,050 miles away) is the far-away foreign place with temperatures most similar to Ixtacomitán (view comparison).

Map
Marker
© OpenStreetMap contributors

Compare Ixtacomitán to another city:

Map

The month of September in Ixtacomitán experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 87% to 83%. The highest chance of overcast or mostly cloudy conditions is 89% on September 14.

The clearest day of the month is September 30, with clear, mostly clear, or partly cloudy conditions 17% of the time.

For reference, on September 13, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 89%, while on February 14, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 75%.

Cloud Cover Categories in September in Ixtacomitán

Cloud Cover Categories in September in IxtacomitánSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctFeb 1475%Feb 1475%Sep 113%Sep 113%Sep 3017%Sep 3017%Sep 1111%Sep 1111%Sep 2113%Sep 2113%clearpartly cloudymostly cloudyovercastmostly clear
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 Ixtacomitán, the chance of a wet day over the course of September is gradually decreasing, starting the month at 81% and ending it at 78%.

For reference, the year's highest daily chance of a wet day is 84% on September 11, and its lowest chance is 19% on March 29.

Probability of Precipitation in September in Ixtacomitán

Probability of Precipitation in September in IxtacomitánSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%AugOctSep 1184%Sep 1184%Sep 181%Sep 181%Sep 3078%Sep 3078%Sep 2181%Sep 2181%rain
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 Ixtacomitán is rapidly increasing, starting the month at 12.0 inches, when it rarely exceeds 17.8 inches or falls below 7.4 inches, and ending the month at 13.2 inches, when it rarely exceeds 20.2 inches or falls below 7.3 inches.

The highest average 31-day accumulation is 13.6 inches on September 23.

Average Monthly Rainfall in September in Ixtacomitán

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 Ixtacomitán, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 28 minutes, implying an average daily decrease of 58 seconds, and weekly decrease of 6 minutes, 47 seconds.

The shortest day of the month is September 30, with 11 hours, 59 minutes of daylight and the longest day is September 1, with 12 hours, 27 minutes of daylight.

Hours of Daylight and Twilight in September in Ixtacomitán

Hours of Daylight and Twilight in September in IxtacomitánSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 8 minSep 2212 hr, 8 minnightnightdaydaySep 112 hr, 27 minSep 112 hr, 27 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 Ixtacomitán is 5:58 AM on September 1 and the latest sunrise is 4 minutes later at 6:02 AM on September 30.

The latest sunset is 6:25 PM on September 1 and the earliest sunset is 24 minutes earlier at 6:01 PM on September 30.

Daylight saving time is not observed in Ixtacomitán during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:38 AM and sets 13 hours, 10 minutes later, at 6:49 PM, while on December 21, the shortest day of the year, it rises at 6:38 AM and sets 11 hours, 5 minutes later, at 5:43 PM.

Sunrise & Sunset with Twilight in September in Ixtacomitán

Sunrise & Sunset with Twilight in September in IxtacomitánSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMAugOct5:58 AM5:58 AMSep 16:25 PMSep 16:25 PM6:02 AM6:02 AMSep 306:01 PMSep 306:01 PM5:59 AM5:59 AMSep 116:17 PMSep 116:17 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 Ixtacomitán

Solar Elevation and Azimuth in September in IxtacomitánSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOct0010102020203030404050505060607080000101020203030304040505060607080
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 Ixtacomitán

Moon Rise, Set & Phases in September in IxtacomitánSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctAug 45:14 AMAug 45:14 AMAug 1912:26 PMAug 1912:26 PMSep 27:56 PMSep 27:56 PMSep 178:35 PMSep 178:35 PMOct 212:50 PMOct 212:50 PMOct 175:27 AMOct 175:27 AM5:57 AM5:57 AM7:13 PM7:13 PM6:52 PM6:52 PM6:46 AM6:46 AM5:35 AM5:35 AM6:25 PM6:25 PM6:07 PM6:07 PM6:29 AM6:29 AM5:53 AM5:53 AM6:02 PM6:02 PM5:19 PM5:19 PM6:11 AM6:11 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%4:44 AMENE5:50 PMWNW-11:19 AMS249,210 mi
2
0%5:35 AMENE6:25 PMW-12:01 PMS250,599 mi
3
0%6:23 AME6:57 PMW-12:41 PMS251,626 mi
4
3%7:09 AME7:28 PMW-1:19 PMS252,246 mi
5
7%7:56 AME8:00 PMW-1:58 PMS252,395 mi
6
12%8:42 AME8:32 PMWSW-2:37 PMS251,999 mi
7
20%9:31 AMESE9:07 PMWSW-3:19 PMS250,984 mi
8
28%10:21 AMESE9:46 PMWSW-4:03 PMS249,293 mi
9
37%11:14 AMESE10:30 PMWSW-4:51 PMS246,907 mi
10
47%12:10 PMESE11:19 PMWSW-5:44 PMS243,858 mi
11
50%1:08 PMESE--6:41 PMS240,256 mi
12
69%-12:14 AMWSW2:05 PMESE7:40 PMS236,293 mi
13
79%-1:14 AMWSW3:00 PMESE8:39 PMS232,247 mi
14
88%-2:18 AMWSW3:52 PMESE9:37 PMS228,458 mi
15
94%-3:22 AMWSW4:40 PMESE10:33 PMS225,293 mi
16
99%-4:25 AMWSW5:24 PME11:26 PMS223,081 mi
17
100%-5:27 AMW6:07 PME--
18
100%-6:29 AMW6:48 PME12:17 AMS222,061 mi
19
98%-7:30 AMW7:31 PMENE1:08 AMS222,335 mi
20
93%-8:33 AMWNW8:16 PMENE2:00 AMS223,848 mi
21
85%-9:36 AMWNW9:04 PMENE2:54 AMN226,401 mi
22
75%-10:41 AMWNW9:57 PMENE3:50 AMN229,698 mi
23
64%-11:44 AMWNW10:53 PMENE4:49 AMN233,397 mi
24
50%-12:45 PMWNW11:52 PMENE5:49 AMN237,174 mi
25
42%-1:40 PMWNW-6:47 AMN240,759 mi
26
32%12:50 AMENE2:29 PMWNW-7:42 AMN243,964 mi
27
23%1:47 AMENE3:13 PMWNW-8:32 AMN246,680 mi
28
15%2:41 AMENE3:52 PMWNW-9:18 AMN248,863 mi
29
9%3:31 AMENE4:27 PMWNW-10:01 AMS250,517 mi
30
4%4:20 AME4:59 PMW-10:41 AMS251,668 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 Ixtacomitán is essentially constant during September, remaining around 100% throughout.

For reference, on August 23, the muggiest day of the year, there are muggy conditions 100% of the time, while on January 18, the least muggy day of the year, there are muggy conditions 64% of the time.

Humidity Comfort Levels in September in Ixtacomitán

Humidity Comfort Levels in September in IxtacomitánSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOctSep 1100%Sep 1100%Sep 3099%Sep 3099%Sep 11100%Sep 11100%Sep 21100%Sep 21100%miserablemiserableoppressiveoppressivemuggymuggyhumidhumid
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 Ixtacomitán is gradually increasing during September, increasing from 5.6 miles per hour to 6.1 miles per hour over the course of the month.

For reference, on November 15, the windiest day of the year, the daily average wind speed is 7.0 miles per hour, while on June 3, the calmest day of the year, the daily average wind speed is 5.2 miles per hour.

The lowest daily average wind speed during September is 5.5 miles per hour on September 7.

Average Wind Speed in September in Ixtacomitán

Average Wind Speed in September in IxtacomitánSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mphAugOctSep 75.5 mphSep 75.5 mphSep 306.1 mphSep 306.1 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 Ixtacomitán throughout September is predominantly from the north, with a peak proportion of 56% on September 30.

Wind Direction in September in Ixtacomitán

Wind Direction in September in IxtacomitánENSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%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).

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 Ixtacomitán 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 Ixtacomitán

Time Spent in Various Temperature Bands and the Growing Season in September in IxtacomitánSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%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 16comfortablewarmhot
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 Ixtacomitán are rapidly increasing during September, increasing by 871°F, from 6,876°F to 7,747°F, over the course of the month.

Growing Degree Days in September in Ixtacomitán

Growing Degree Days in September in IxtacomitánSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930306,600°F6,600°F6,800°F6,800°F7,000°F7,000°F7,200°F7,200°F7,400°F7,400°F7,600°F7,600°F7,800°F7,800°FAugOctSep 16,876°FSep 16,876°FSep 307,747°FSep 307,747°FSep 117,178°FSep 117,178°FSep 217,481°FSep 217,481°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 Ixtacomitán is essentially constant during September, remaining within 0.1 kWh of 4.8 kWh throughout.

The lowest average daily incident shortwave solar energy during September is 4.7 kWh on September 15.

Average Daily Incident Shortwave Solar Energy in September in Ixtacomitán

Average Daily Incident Shortwave Solar Energy in September in IxtacomitánSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhAugOctSep 154.7 kWhSep 154.7 kWhSep 15.0 kWhSep 15.0 kWhSep 304.9 kWhSep 304.9 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 Ixtacomitán are 17.431 deg latitude, -93.097 deg longitude, and 505 ft elevation.

The topography within 2 miles of Ixtacomitán contains large variations in elevation, with a maximum elevation change of 2,293 feet and an average elevation above sea level of 802 feet. Within 10 miles contains large variations in elevation (5,712 feet). Within 50 miles also contains extreme variations in elevation (8,727 feet).

The area within 2 miles of Ixtacomitán is covered by cropland (78%) and trees (22%), within 10 miles by cropland (69%) and trees (31%), and within 50 miles by cropland (71%) and trees (24%).

This report illustrates the typical weather in Ixtacomitán, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Ixtacomitán.

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

The stations contributing to this reconstruction are:

Sources mapMMVA, 47%42 mi, -459 ftMMTB, 33%48 mi, 1,401 ftMMTG, 21%48 mi, 2,943 ft© OpenStreetMap contributors

To get a sense of how much these sources agree with each other, you can view a comparison of Ixtacomitán 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.

Please review our full terms contained on our Terms of Service page.