Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
January tends to be the coldest month in Guayanilla, with temperatures averaging a daily high of 81.9°F (27.7°C) and a low of 72°F (22.2°C).Heat index
The heat index value during January is computed to be a tropical 87.8°F (31°C). If one continues to be active during enduring exposure, it could result in fatigue and heat cramps.Given the heat index, its values are aligned with shaded sites and gentle winds. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', joins air temperature with relative humidity to produce a temperature perception for humans. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Humidity
The average relative humidity in January in Guayanilla is 77%.Rainfall
January is the month with the least rainfall in Guayanilla, Puerto Rico. Rain falls for 15.6 days and accumulates 0.71" (18mm) of precipitation.Snowfall
January through August, October through December are months without snowfall.Daylight
In January, the average length of the day in Guayanilla is 11h and 11min.On the first day of January, sunrise is at 6:58 am and sunset at 6:02 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:20 pm AST.
Sunshine
In January, the average sunshine in Guayanilla is 9.3h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: An average UV index of 6 in January transforms into this advice:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months in Guayanilla?
What are the temperatures in Guayanilla in January?
What is the average humidity in January in Guayanilla?
What is the driest month in Guayanilla?
How many days does it rain in January in Guayanilla?
When it does not snow in Guayanilla?
What is the average length of the day in January in Guayanilla?
When are sunrise and sunset in January in Guayanilla?
How long on average sun shines in January in Guayanilla?
What are the months with the lowest UV index in Guayanilla?
How high is the UV index in January in Guayanilla?
Average temperature in January
Guayanilla, PR
- Average high temperature in January: 81.9°F
The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is January (81.9°F).
- Average low temperature in January: 72°F
The months with the highest average low temperature are July, August and October (76.6°F).
The coldest month (with the lowest average low temperature) is March (71.4°F).
Average pressure in January
Guayanilla, PR
- Average pressure in January: 30.01"Hg
The months with the highest atmospheric pressure are January and February (30.01"Hg).
The month with the lowest atmospheric pressure is October (29.89"Hg).
Average wind speed in January
Guayanilla, PR
- Average wind speed in January: 7mph
The windiest month (with the highest average wind speed) is July (8mph).
The calmest month (with the lowest average wind speed) is November (5.6mph).
Average humidity in January
Guayanilla, PR
- Average humidity in January: 77%
The month with the highest relative humidity is November (80%).
The month with the lowest relative humidity is March (75%).
Average rainfall in January
Guayanilla, PR
- Average rainfall in January: 0.71"
The wettest month (with the highest rainfall) is September (3.58").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in January
Guayanilla, PR
- Average rainfall days in January: 15.6 days
The month with the highest number of rainy days is November (22.5 days).
The month with the least rainy days is February (14.8 days).
Average snowfall days in January
Guayanilla, PR
- Average snowfall days in January: 0 days
The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).
Average daylight in January /
Average sunshine in January
Guayanilla, PR
- Average daylight in January: 11h and 1min
The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).
- Average sunshine in January: 9h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is November (Average sunshine: 7h and 6min).
Average sunshine days in January
Guayanilla, PR
- Average sunshine days in January: 10.8 days
The month with the most sunshine days is June (12.2 days).
The month with the least sunshine days is November (5.1 days).
Average UV index in January
Guayanilla, PR
- Average UV index in January: 6
The months with the highest UV index are April, May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 6).
Average cloud cover in January
Guayanilla, PR
- Average cloud cover in January: 22
The month with the most cloud cover is May (Cloud cover 30).
The months with the least cloud cover are January and February (Cloud cover 22).
Average visibility in January
Guayanilla, PR
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Guayanilla, Puerto Rico, USA
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