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September Weather in Suárez Puerto Rico

Daily high temperatures are around 88°F, rarely falling below 85°F or exceeding 90°F.

Daily low temperatures are around 78°F, rarely falling below 76°F or exceeding 81°F.

For reference, on August 25, the hottest day of the year, temperatures in Suárez typically range from 79°F to 88°F, while on January 25, the coldest day of the year, they range from 73°F to 82°F.

Average High and Low Temperature in September in Suárez

Average High and Low Temperature in September in Suárez1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303074°F74°F76°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 188°FSep 188°F78°F78°FSep 3088°FSep 3088°F78°F78°FSep 1188°FSep 1188°F78°F78°FSep 2188°FSep 2188°F78°F78°FNowNow
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 Suárez

Average Hourly Temperature in September in Suárez1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctNowNowwarmwarmhot
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.

Malindi, Kenya (7,343 miles away) and Kani Kéli, Mayotte (7,863 miles) are the far-away foreign places with temperatures most similar to Suárez (view comparison).

Compare Suárez to another city:

Clouds

The month of September in Suárez experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 67% throughout the month. The highest chance of overcast or mostly cloudy conditions is 69% on September 26.

The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 34% of the time.

For reference, on May 30, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 74%, while on January 11, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 82%.

Cloud Cover Categories in September in Suárez

Cloud Cover Categories in September in Suárez181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctJan 1182%Jan 1182%Sep 134%Sep 134%Sep 3032%Sep 3032%Sep 1132%Sep 1132%Sep 2131%Sep 2131%NowNowclearmostly clearpartly cloudymostly cloudyovercast
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.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Suárez, the chance of a wet day over the course of September is essentially constant, remaining around 48% throughout.

For reference, the year's highest daily chance of a wet day is 50% on September 26, and its lowest chance is 20% on January 17.

Probability of Precipitation in September in Suárez

Probability of Precipitation in September in Suárez181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%45%45%50%50%55%55%AugOctSep 2650%Sep 2650%Sep 147%Sep 147%Sep 1149%Sep 1149%NowNowrain
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 Suárez is gradually increasing, starting the month at 4.2 inches, when it rarely exceeds 8.6 inches or falls below 1.2 inches, and ending the month at 4.7 inches, when it rarely exceeds 8.9 inches or falls below 1.3 inches.

The highest average 31-day accumulation is 4.9 inches on September 18.

Average Monthly Rainfall in September in Suárez

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

Over the course of September in Suárez, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 30 minutes, implying an average daily decrease of 1 minute, 2 seconds, and weekly decrease of 7 minutes, 11 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, 28 minutes of daylight.

Hours of Daylight and Twilight in September in Suárez

Hours of Daylight and Twilight in September in Suárez181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 7 minSep 2212 hr, 7 minnightnightdaydaySep 112 hr, 28 minSep 112 hr, 28 minNowNow
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 Suárez is 6:08 AM on September 1 and the latest sunrise is 5 minutes later at 6:13 AM on September 30.

The latest sunset is 6:37 PM on September 1 and the earliest sunset is 25 minutes earlier at 6:12 PM on September 30.

Daylight saving time is not observed in Suárez during 2021.

For reference, on June 21, the longest day of the year, the Sun rises at 5:48 AM and sets 13 hours, 14 minutes later, at 7:02 PM, while on December 21, the shortest day of the year, it rises at 6:50 AM and sets 11 hours, 2 minutes later, at 5:52 PM.

Sunrise & Sunset with Twilight in September in Suárez

Sunrise & Sunset with Twilight in September in Suárez181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMAugOct6:08 AM6:08 AMSep 16:37 PMSep 16:37 PM6:13 AM6:13 AMSep 306:12 PMSep 306:12 PM6:10 AM6:10 AMSep 116:28 PMSep 116:28 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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.

Moon

The figure below presents a compact representation of key lunar data for September 2021. 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 Suárez

Moon Rise, Set & Phases in September in Suárez1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctAug 89:51 AMAug 89:51 AMAug 228:03 AMAug 228:03 AMSep 68:52 PMSep 68:52 PMSep 207:55 PMSep 207:55 PMOct 67:06 AMOct 67:06 AMOct 2010:57 AMOct 2010:57 AM5:57 AM5:57 AM7:20 PM7:20 PM6:31 PM6:31 PM6:06 AM6:06 AM5:40 AM5:40 AM6:39 PM6:39 PM6:28 PM6:28 PM6:39 AM6:39 AM6:17 AM6:17 AM6:34 PM6:34 PM5:37 PM5:37 PM6:13 AM6:13 AMNowNow
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.

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.

The chance that a given day will be muggy in Suárez is essentially constant during September, remaining around 100% throughout.

For reference, on June 1, the muggiest day of the year, there are muggy conditions 100% of the time, while on March 9, the least muggy day of the year, there are muggy conditions 81% of the time.

Humidity Comfort Levels in September in Suárez

Humidity Comfort Levels in September in Suárez181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%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 30100%Sep 30100%Sep 11100%Sep 11100%Sep 21100%Sep 21100%NowNowmiserablemiserableoppressiveoppressivemuggymuggy
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.

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 Suárez is decreasing during September, decreasing from 11.1 miles per hour to 9.8 miles per hour over the course of the month.

For reference, on July 14, the windiest day of the year, the daily average wind speed is 12.8 miles per hour, while on October 10, the calmest day of the year, the daily average wind speed is 9.5 miles per hour.

Average Wind Speed in September in Suárez

Average Wind Speed in September in Suárez181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphAugOctSep 111.1 mphSep 111.1 mphSep 309.8 mphSep 309.8 mphSep 1610.2 mphSep 1610.2 mphNowNow
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 Suárez throughout September is predominantly from the east, with a peak proportion of 90% on September 1.

Wind Direction in September in Suárez

Wind Direction in September in Suárez181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%AugOctNowNoweastsouth
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).

Water Temperature

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

Average Water Temperature in September in Suárez

Average Water Temperature in September in Suárez1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303081.0°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 184°FSep 184°FSep 3084°FSep 3084°FSep 1184°FSep 1184°FSep 2184°FSep 2184°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

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 Suárez 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 Suárez

Time Spent in Various Temperature Bands and the Growing Season in September in Suárez181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%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 16NowNowwarmhot
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 Suárez are very rapidly increasing during September, increasing by 932°F, from 7,254°F to 8,186°F, over the course of the month.

Growing Degree Days in September in Suárez

The average growing degree days accumulated over the course of September, 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 in Suárez is gradually decreasing during September, falling by 0.6 kWh, from 5.4 kWh to 4.8 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in September in Suárez

Average Daily Incident Shortwave Solar Energy in September in Suárez181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhAugOctSep 15.4 kWhSep 15.4 kWhSep 304.8 kWhSep 304.8 kWhSep 115.1 kWhSep 115.1 kWhNowNow
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 Suárez are 18.430 deg latitude, -65.854 deg longitude, and 10 ft elevation.

The topography within 2 miles of Suárez is essentially flat, with a maximum elevation change of 75 feet and an average elevation above sea level of 6 feet. Within 10 miles is essentially flat (3,412 feet). Within 50 miles also contains extreme variations in elevation (4,121 feet).

The area within 2 miles of Suárez is covered by water (58%), trees (13%), grassland (11%), and cropland (10%), within 10 miles by water (61%) and trees (17%), and within 50 miles by water (80%).

Data Sources

This report illustrates the typical weather in Suárez, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Suárez.

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

The stations contributing to this reconstruction are: Luis Muñoz Marín International Airport (TJSJ, 71%, 17 kilometers, west) and José Aponte de la Torre Airport (TJNR, 29%, 30 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 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 © 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.