Average Weather in San Jacinto Guatemala
In San Jacinto, the wet season is muggy and overcast, the dry season is mostly clear, and it is warm year round. Over the course of the year, the temperature typically varies from 62°F to 89°F and is rarely below 57°F or above 94°F.
Based on the tourism score, the best time of year to visit San Jacinto for warm-weather activities is from late November to mid March.
The hot season lasts for 2.1 months, from March 20 to May 23, with an average daily high temperature above 87°F. The hottest day of the year is April 17, with an average high of 89°F and low of 67°F.
The cool season lasts for 3.2 months, from October 25 to February 2, with an average daily high temperature below 81°F. The coldest day of the year is January 14, with an average low of 62°F and high of 79°F.
Average High and Low Temperature
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
In San Jacinto, 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 Jacinto begins around November 15 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 15. On June 13, the cloudiest day of the year, the sky is overcast or mostly cloudy 93% of the time, and clear, mostly clear, or partly cloudy 7% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in San Jacinto varies significantly throughout the year.
The wetter season lasts 5.3 months, from May 16 to October 27, with a greater than 25% chance of a given day being a wet day. The chance of a wet day peaks at 47% on September 15.
The drier season lasts 6.7 months, from October 27 to May 16. The smallest chance of a wet day is 4% on March 9.
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 47% on September 15.
Daily Chance of Precipitation
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 Jacinto experiences extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 8.6 months, from April 5 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 June 17, with an average total accumulation of 5.2 inches.
The rainless period of the year lasts for 3.3 months, from December 25 to April 5. The least rain falls around March 4, with an average total accumulation of 0.2 inches.
Average Monthly Rainfall
The length of the day in San Jacinto varies over the course of the year. In 2018, the shortest day is December 21, with 11 hours, 16 minutes of daylight; the longest day is June 21, with 13 hours, 0 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:27 AM on June 2, and the latest sunrise is 1 hour, 0 minutes later at 6:27 AM on January 21. The earliest sunset is at 5:25 PM on November 21, and the latest sunset is 1 hour, 6 minutes later at 6:31 PM on July 9.
Daylight saving time (DST) is not observed in San Jacinto during 2018.
Sunrise & Sunset with Twilight
San Jacinto experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 7.5 months, from April 9 to November 25, during which time the comfort level is muggy, oppressive, or miserable at least 27% of the time. The muggiest day of the year is September 16, with muggy conditions 86% of the time.
The least muggy day of the year is January 30, with muggy conditions 7% of the time.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in San Jacinto experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 6.0 months, from October 24 to April 24, with average wind speeds of more than 6.4 miles per hour. The windiest day of the year is January 13, with an average hourly wind speed of 8.5 miles per hour.
The calmer time of year lasts for 6.0 months, from April 24 to October 24. The calmest day of the year is September 15, with an average hourly wind speed of 4.2 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in San Jacinto is from the north throughout the year.
Best Time of Year to Visit
To characterize how pleasant the weather is in San Jacinto 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 Jacinto for general outdoor tourist activities is from late November to mid March, with a peak score in the second week of January.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit San Jacinto for hot-weather activities is from early March to late April, with a peak score in the last week of March.
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.
Temperatures in San Jacinto 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
Growing Degree Days
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 1.9 months, from February 22 to April 19, 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 2.1 months, from August 20 to October 25, with an average daily incident shortwave energy per square meter below 5.1 kWh. The darkest day of the year is September 19, with an average of 4.6 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of San Jacinto are 14.667 deg latitude, -89.500 deg longitude, and 2,385 ft elevation.
The topography within 2 miles of San Jacinto contains very significant variations in elevation, with a maximum elevation change of 1,755 feet and an average elevation above sea level of 2,169 feet. Within 10 miles contains very significant variations in elevation (5,125 feet). Within 50 miles also contains extreme variations in elevation (9,852 feet).
The area within 2 miles of San Jacinto is covered by grassland (40%), cropland (39%), and trees (20%), within 10 miles by cropland (41%) and trees (31%), and within 50 miles by cropland (36%) and trees (35%).
This report illustrates the typical weather in San Jacinto, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in San Jacinto.
For each station, the records are corrected for the elevation difference between that station and San Jacinto 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 Jacinto is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Jacinto and a given station.
The stations contributing to this reconstruction are: Santa Rosa De Copan (39%, 78 kilometers, east); La Aurora International Airport (19%, 111 kilometers, west); Ilopango International Airport (25%, 115 kilometers, south); and Acajutla (17%, 128 kilometers, south).
Time zones for aiports and weather stations are provided by AskGeo.com .