Average Weather in January in Cayuco Puerto Rico
Daily high temperatures are around 80°F, rarely falling below 77°F or exceeding 82°F. The lowest daily average high temperature is 80°F on January 23.
Daily low temperatures are around 66°F, rarely falling below 62°F or exceeding 69°F.
For reference, on August 5, the hottest day of the year, temperatures in Cayuco typically range from 72°F to 85°F, while on January 24, the coldest day of the year, they range from 65°F to 80°F.
Average High and Low Temperature in January
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on January. 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 January
The month of January in Cayuco experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 19% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 18% on January 11.
The clearest day of the month is January 11, with clear, mostly clear, or partly cloudy conditions 82% 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 10, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 82%.
Cloud Cover Categories in January
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 Cayuco, the chance of a wet day over the course of January is essentially constant, remaining around 19% throughout.
For reference, the year's highest daily chance of a wet day is 45% on September 27, and its lowest chance is 16% on March 9.
Probability of Precipitation in January
The average sliding 31-day rainfall during January in Cayuco is essentially constant, remaining about 1.1 inches throughout, and rarely exceeding 2.5 inches.
Average Monthly Rainfall in January
Over the course of January in Cayuco, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 17 minutes, implying an average daily increase of 34 seconds, and weekly increase of 3 minutes, 57 seconds.
The shortest day of the month is January 1, with 11 hours, 4 minutes of daylight and the longest day is January 31, with 11 hours, 21 minutes of daylight.
Hours of Daylight and Twilight in January
The earliest sunrise of the month in Cayuco is 6:58 AM on January 1 and the latest sunrise is 3 minutes, 0 seconds later at 7:01 AM on January 18.
The earliest sunset is 6:02 PM on January 1 and the latest sunset is 18 minutes later at 6:20 PM on January 31.
Daylight saving time is not observed in Cayuco during 2021.
For reference, on June 21, the longest day of the year, the Sun rises at 5:51 AM and sets 13 hours, 14 minutes later, at 7:05 PM, while on December 21, the shortest day of the year, it rises at 6:54 AM and sets 11 hours, 2 minutes later, at 5:56 PM.
Sunrise & Sunset with Twilight in January
The figure below presents a compact representation of key lunar data for January 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 January
The chance that a given day will be muggy in Cayuco is rapidly decreasing during January, falling from 79% to 69% 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 62% of the time.
Humidity Comfort Levels in January
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Cayuco is essentially constant during January, remaining within 0.1 miles per hour of 11.2 miles per hour throughout.
For reference, on July 14, the windiest day of the year, the daily average wind speed is 12.0 miles per hour, while on October 10, the calmest day of the year, the daily average wind speed is 8.8 miles per hour.
Average Wind Speed in January
The hourly average wind direction in Cayuco throughout January is predominantly from the east, with a peak proportion of 88% on January 16.
Wind Direction in January
Cayuco 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 Cayuco is essentially constant during January, remaining around 80°F throughout.
Average Water Temperature in January
Temperatures in Cayuco 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 January
The average accumulated growing degree days in Cayuco are rapidly increasing during January, increasing by 662°F, from 1°F to 663°F, over the course of the month.
Growing Degree Days in January
The average daily incident shortwave solar energy in Cayuco is gradually increasing during January, rising by 0.7 kWh, from 5.0 kWh to 5.6 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in January
For the purposes of this report, the geographical coordinates of Cayuco are 18.291 deg latitude, -66.739 deg longitude, and 1,414 ft elevation.
The topography within 2 miles of Cayuco contains very significant variations in elevation, with a maximum elevation change of 1,257 feet and an average elevation above sea level of 1,287 feet. Within 10 miles contains very significant variations in elevation (3,343 feet). Within 50 miles also contains extreme variations in elevation (4,442 feet).
The area within 2 miles of Cayuco is covered by trees (61%), cropland (15%), grassland (14%), and shrubs (10%), within 10 miles by trees (71%) and cropland (11%), and within 50 miles by water (70%) and trees (15%).
This report illustrates the typical weather in Cayuco, 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 Cayuco.
For each station, the records are corrected for the elevation difference between that station and Cayuco 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 Cayuco is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Cayuco and a given station.
The stations contributing to this reconstruction are: Mercedita Airport (42%, 37 kilometers, southeast); Rafael Hernandez Airport (38%, 47 kilometers, northwest); and Luis Muñoz Marín International Airport (21%, 79 kilometers, east).
Time zones for airports and weather stations are provided by AskGeo.com .