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Average Weather in San Agustín Acasaguastlán Guatemala

In San Agustín Acasaguastlán, the wet season is muggy and overcast, the dry season is mostly clear, and it is hot year round. Over the course of the year, the temperature typically varies from 65°F to 93°F and is rarely below 60°F or above 98°F.

Based on the tourism score, the best time of year to visit San Agustín Acasaguastlán for warm-weather activities is from early December to early March.

Climate Summary

warmhotwarmJanFebMarAprMayJunJulAugSepOctNovDec78%78%8%8%overcastclearprecipitation: 5.6 inprecipitation: 5.6 in0.2 in0.2 inmuggy: 83%muggy: 83%6%6%tourism score: 7.8tourism score: 7.83.43.4
Click on each chart for more information.

Temperature

The hot season lasts for 2.1 months, from March 21 to May 26, with an average daily high temperature above 90°F. The hottest day of the year is April 18, with an average high of 93°F and low of 71°F.

The cool season lasts for 3.1 months, from October 28 to February 3, with an average daily high temperature below 84°F. The coldest day of the year is January 15, with an average low of 65°F and high of 82°F.

Average High and Low Temperature

Average High and Low Temperature in San Agustín AcasaguastlánhotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F10°F20°F30°F40°F50°F60°F70°F80°F90°F100°FJan 1582°FJan 1582°FApr 1893°FApr 1893°F65°F65°F71°F71°FMay 2690°FMay 2690°FOct 2884°FOct 2884°F68°F68°F73°F73°F70°F70°FLowHigh
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 entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature

Average Hourly Temperature in San Agustín AcasaguastlánJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMcomfortablecomfortablecomfortablewarmhotwarm
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.

Uddiawan, Philippines (9,407 miles away) is the far-away foreign place with temperatures most similar to San Agustín Acasaguastlán (view comparison).

Clouds

In San Agustín Acasaguastlán, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in San Agustín Acasaguastlán begins around November 16 and lasts for 5.1 months, ending around April 19. On January 27, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 78% of the time, and overcast or mostly cloudy 22% of the time.

The cloudier part of the year begins around April 19 and lasts for 6.9 months, ending around November 16. On June 13, the cloudiest day of the year, the sky is overcast or mostly cloudy 92% of the time, and clear, mostly clear, or partly cloudy 8% of the time.

Cloud Cover Categories

Cloud Cover Categories in San Agustín AcasaguastlánclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jan 2778%Jan 2778%Jun 138%Jun 138%Nov 1643%Nov 1643%Apr 1944%Apr 1944%clearmostly clearmostly cloudyovercastpartly cloudy
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in San Agustín Acasaguastlán varies significantly throughout the year.

The wetter season lasts 5.3 months, from May 17 to October 25, with a greater than 28% chance of a given day being a wet day. The chance of a wet day peaks at 53% on September 15.

The drier season lasts 6.7 months, from October 25 to May 17. The smallest chance of a wet day is 4% on March 8.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 53% on September 15.

Daily Chance of Precipitation

Daily Chance of Precipitation in San Agustín AcasaguastlánwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Sep 1553%Sep 1553%Mar 84%Mar 84%Jan 17%Jan 17%May 1728%May 1728%Oct 2528%Oct 2528%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 months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. San Agustín Acasaguastlán experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 8.7 months, from April 3 to December 25, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around September 14, with an average total accumulation of 5.6 inches.

The rainless period of the year lasts for 3.3 months, from December 25 to April 3. The least rain falls around February 21, with an average total accumulation of 0.2 inches.

Average Monthly Rainfall

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 liquid-equivalent snowfall.

Sun

The length of the day in San Agustín Acasaguastlán varies over the course of the year. In 2018, the shortest day is December 21, with 11 hours, 15 minutes of daylight; the longest day is June 21, with 13 hours, 1 minute of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in San Agustín AcasaguastlánJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2013 hr, 1 minJun 2113 hr, 1 minJun 2112 hr, 7 minSep 2212 hr, 7 minSep 2211 hr, 15 minDec 2111 hr, 15 minDec 21nightnightday
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 is at 5:29 AM on June 3, and the latest sunrise is 1 hour, 1 minute later at 6:29 AM on January 21. The earliest sunset is at 5:27 PM on November 21, and the latest sunset is 1 hour, 7 minutes later at 6:34 PM on July 8.

Daylight saving time (DST) is not observed in San Agustín Acasaguastlán during 2018.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in San Agustín AcasaguastlánJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 35:29 AMJun 35:29 AM6:34 PMJul 86:34 PMJul 8Nov 215:27 PMNov 215:27 PM6:29 AMJan 216:29 AMJan 21daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2018. 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.

Humidity

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.

San Agustín Acasaguastlán experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 7.4 months, from April 12 to November 24, during which time the comfort level is muggy, oppressive, or miserable at least 26% of the time. The muggiest day of the year is June 19, with muggy conditions 83% of the time.

The least muggy day of the year is January 30, with muggy conditions 6% of the time.

Humidity Comfort Levels

Humidity Comfort Levels in San Agustín AcasaguastlánmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 306%Jan 306%83%Jun 1983%Jun 19Apr 1226%Apr 1226%Nov 2426%Nov 2426%muggymuggyhumidhumidcomfortablecomfortabledrydryoppressiveoppressive
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Agustín Acasaguastlán experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.5 months, from October 22 to May 5, with average wind speeds of more than 5.7 miles per hour. The windiest day of the year is January 13, with an average hourly wind speed of 7.1 miles per hour.

The calmer time of year lasts for 5.5 months, from May 5 to October 22. The calmest day of the year is September 15, with an average hourly wind speed of 4.2 miles per hour.

Average Wind Speed

Average Wind Speed in San Agustín AcasaguastlánwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mphJan 137.1 mphJan 137.1 mphSep 154.2 mphSep 154.2 mphMay 55.7 mphMay 55.7 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in San Agustín Acasaguastlán varies throughout the year.

The wind is most often from the east for 2.6 weeks, from May 31 to June 18, with a peak percentage of 36% on June 10. The wind is most often from the north for 11 months, from June 18 to May 31, with a peak percentage of 84% on January 1.

Wind Direction

Wind Direction in San Agustín AcasaguastlánNENJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%northeastsouth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in San Agustín Acasaguastlán throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit San Agustín Acasaguastlán for general outdoor tourist activities is from early December to early March, with a peak score in the second week of January.

Tourism Score

Tourism Score in San Agustín Acasaguastlánbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468107.87.83.43.44.44.43.83.8 precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit San Agustín Acasaguastlán for hot-weather activities are from late January to late April and from early December to early January, with a peak score in the last week of March.

Beach/Pool Score

Beach/Pool Score in San Agustín Acasaguastlánbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.56.54.34.35.25.24.54.5 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Growing Season

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 Agustín Acasaguastlán 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

Time Spent in Various Temperature Bands and the Growing Season in San Agustín AcasaguastlánJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Jan 1100%Jan 1100%Jul 3100%Jul 3coolcomfortablewarmhotsweltering
The percentage of time spent in various temperature bands: 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 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.

Growing Degree Days

Growing Degree Days in San Agustín AcasaguastlánJanFebMarAprMayJunJulAugSepOctNovDec0°F1,000°F2,000°F3,000°F4,000°F5,000°F6,000°F7,000°F8,000°F9,000°FJan 590°FJan 590°FMar 181,800°FMar 181,800°FDec 319,634°FDec 319,634°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 experiences some seasonal variation over the course of the year.

The brighter period of the year lasts for 2.0 months, from February 24 to April 22, with an average daily incident shortwave energy per square meter above 6.5 kWh. The brightest day of the year is March 23, with an average of 7.0 kWh.

The darker period of the year lasts for 2.0 months, from August 23 to October 23, with an average daily incident shortwave energy per square meter below 5.2 kWh. The darkest day of the year is September 16, with an average of 4.7 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in San Agustín AcasaguastlánbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWhMar 237.0 kWhMar 237.0 kWhSep 164.7 kWhSep 164.7 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.

Topography

For the purposes of this report, the geographical coordinates of San Agustín Acasaguastlán are 14.950 deg latitude, -89.967 deg longitude, and 1,444 ft elevation.

The topography within 2 miles of San Agustín Acasaguastlán contains very significant variations in elevation, with a maximum elevation change of 1,821 feet and an average elevation above sea level of 1,449 feet. Within 10 miles contains very significant variations in elevation (8,993 feet). Within 50 miles also contains extreme variations in elevation (9,843 feet).

The area within 2 miles of San Agustín Acasaguastlán is covered by grassland (47%), cropland (32%), and trees (22%), within 10 miles by cropland (42%) and trees (37%), and within 50 miles by trees (41%) and cropland (37%).

Data Sources

This report illustrates the typical weather in San Agustín Acasaguastlán, 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 San Agustín Acasaguastlán.

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

The stations contributing to this reconstruction are: La Aurora International Airport (39%, 73 kilometers, southwest); Santa Rosa De Copan (34%, 129 kilometers, east); and Ilopango International Airport (27%, 167 kilometers, southeast).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

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.