Average Weather in May in Ciales Puerto Rico
Daily high temperatures are around 85°F, rarely falling below 82°F or exceeding 88°F.
Daily low temperatures increase by 2°F, from 71°F to 73°F, rarely falling below 69°F or exceeding 75°F.
For reference, on August 5, the hottest day of the year, temperatures in Ciales typically range from 74°F to 87°F, while on January 24, the coldest day of the year, they range from 68°F to 82°F.
Average High and Low Temperature in May
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on May. 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 May
The month of May in Ciales experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 47% to 74%. The highest chance of overcast or mostly cloudy conditions is 74% on May 30.
The clearest day of the month is May 1, with clear, mostly clear, or partly cloudy conditions 53% 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 May
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. In Ciales, the chance of a wet day over the course of May is gradually increasing, starting the month at 37% and ending it at 40%.
For reference, the year's highest daily chance of a wet day is 47% on September 26, and its lowest chance is 19% on March 10.
Probability of Precipitation in May
The average sliding 31-day rainfall during May in Ciales is gradually increasing, starting the month at 2.9 inches, when it rarely exceeds 6.2 inches or falls below 0.7 inches, and ending the month at 3.3 inches, when it rarely exceeds 6.9 inches or falls below 0.9 inches.
The highest average 31-day accumulation is 3.6 inches on May 19.
Average Monthly Rainfall in May
Over the course of May in Ciales, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 21 minutes, implying an average daily increase of 41 seconds, and weekly increase of 4 minutes, 47 seconds.
The shortest day of the month is May 1, with 12 hours, 49 minutes of daylight and the longest day is May 31, with 13 hours, 9 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Ciales is 5:58 AM on May 1 and the earliest sunrise is 10 minutes earlier at 5:49 AM on May 31.
The earliest sunset is 6:47 PM on May 1 and the latest sunset is 11 minutes later at 6:58 PM on May 31.
Daylight saving time is not observed in Ciales during 2021.
For reference, on June 21, the longest day of the year, the Sun rises at 5:50 AM and sets 13 hours, 14 minutes later, at 7:04 PM, while on December 21, the shortest day of the year, it rises at 6:53 AM and sets 11 hours, 2 minutes later, at 5:55 PM.
Sunrise & Sunset with Twilight in May
The figure below presents a compact representation of key lunar data for May 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 May
The chance that a given day will be muggy in Ciales is increasing during May, rising from 94% to 100% over the course of the month.
For reference, on July 11, the muggiest day of the year, there are muggy conditions 100% of the time, while on February 28, the least muggy day of the year, there are muggy conditions 69% of the time.
Humidity Comfort Levels in May
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Ciales is essentially constant during May, remaining within 0.1 miles per hour of 10.2 miles per hour throughout.
For reference, on July 14, the windiest day of the year, the daily average wind speed is 12.1 miles per hour, while on October 10, the calmest day of the year, the daily average wind speed is 8.9 miles per hour.
The lowest daily average wind speed during May is 10.0 miles per hour on May 4.
Average Wind Speed in May
The hourly average wind direction in Ciales throughout May is predominantly from the east, with a peak proportion of 90% on May 31.
Wind Direction in May
Ciales 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 Ciales is essentially constant during May, remaining within 1°F of 81°F throughout.
Average Water Temperature in May
Temperatures in Ciales 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 May
The average accumulated growing degree days in Ciales are rapidly increasing during May, increasing by 848°F, from 2,997°F to 3,845°F, over the course of the month.
Growing Degree Days in May
The average daily incident shortwave solar energy in Ciales is decreasing during May, falling by 1.1 kWh, from 6.7 kWh to 5.5 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in May
For the purposes of this report, the geographical coordinates of Ciales are 18.336 deg latitude, -66.469 deg longitude, and 305 ft elevation.
The topography within 2 miles of Ciales contains very significant variations in elevation, with a maximum elevation change of 1,076 feet and an average elevation above sea level of 590 feet. Within 10 miles contains very significant variations in elevation (3,885 feet). Within 50 miles also contains extreme variations in elevation (4,442 feet).
The area within 2 miles of Ciales is covered by trees (59%), grassland (16%), and cropland (16%), within 10 miles by trees (61%) and grassland (15%), and within 50 miles by water (65%) and trees (18%).
This report illustrates the typical weather in Ciales, 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 Ciales.
For each station, the records are corrected for the elevation difference between that station and Ciales 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 Ciales is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Ciales and a given station.
The stations contributing to this reconstruction are: Mercedita Airport (48%, 38 kilometers, south); Luis Muñoz Marín International Airport (33%, 50 kilometers, east); and Rafael Hernandez Airport (19%, 72 kilometers, west).
Time zones for airports and weather stations are provided by AskGeo.com .