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 sea temperature 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
The month of January, characterized by an average high of 79.9°F (26.6°C) and a low of 71.4°F (21.9°C), is recognized as the coldest.Humidity
In January, the average relative humidity in Arroyo is 80%.Rainfall
In January, the rain falls for 16.8 days. Throughout January, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 255.3 rainfall days, and 29.41" (747mm) of precipitation is accumulated.Ocean temperature
In Arroyo, Puerto Rico, the average seawater temperature in January is 80.2°F (26.8°C).Note: Engaging in water activities, such as swimming or diving, in temperatures from 77°F (25°C) to 84.2°F (29°C) is very pleasurable for extended periods, without any discomfort.
Daylight
The average length of the day in January in Arroyo is 11h and 11min.On the first day of the month, sunrise is at 6:55 am and sunset at 5:59 pm. On the last day of January, in Arroyo, sunrise is at 6:57 am and sunset at 6:18 pm AST.
Sunshine
The average sunshine in January in Arroyo is 8.8h.UV index
January through April, November and December, with an average maximum UV index of 6, are months with the lowest UV index in Arroyo, Puerto Rico. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In January, the maximum UV index of 6 suggests these recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.
Frequently asked questions
What are the coldest months in Arroyo?
What are January temperatures in Arroyo?
What is the average humidity in January in Arroyo?
How much does it rain in Arroyo in January?
What is the ocean temperature in January in Arroyo?
How many hours of daylight does Arroyo have in January?
What time are sunrise and sunset in January in Arroyo?
How many hours of sunshine does Arroyo have in January?
What are the months with the lowest UV index in Arroyo?
What is the UV index reading in January in Arroyo?
Average temperature in January
Arroyo, PR
- Average high temperature in January: 79.9°F
The warmest month (with the highest average high temperature) is August (85.3°F).
The month with the lowest average high temperature is January (79.9°F).
- Average low temperature in January: 71.4°F
The months with the highest average low temperature are July and August (76.6°F).
The coldest month (with the lowest average low temperature) is January (71.4°F).
Average pressure in January
Arroyo, 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 (29.9"Hg).
Average wind speed in January
Arroyo, PR
- Average wind speed in January: 7.7mph
The windiest month (with the highest average wind speed) is July (8.6mph).
The calmest month (with the lowest average wind speed) is October (6mph).
Average humidity in January
Arroyo, PR
- Average humidity in January: 80%
The month with the highest relative humidity is November (82%).
The month with the lowest relative humidity is March (77%).
Average rainfall in January
Arroyo, PR
- Average rainfall in January: 1.22"
The wettest month (with the highest rainfall) is September (4.29").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days in January
Arroyo, PR
- Average rainfall days in January: 16.8 days
The months with the highest number of rainy days are May and October (25.3 days).
The month with the least rainy days is February (15.4 days).
Average sea temperature in January
Arroyo, PR
- Average sea temperature in January: 80.3°F
The best month for swimming (with the highest average sea temperature) is September (85.4°F).
The coldest months (with the lowest average sea temperature) are February and March (79.3°F).
Average daylight in January /
Average sunshine in January
Arroyo, 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: 8h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in January
Arroyo, PR
- Average sunshine days in January: 8.8 days
The month with the most sunshine days is January (8.8 days).
The month with the least sunshine days is May (2.7 days).
Average UV index in January
Arroyo, PR
- Average UV index in January: 6
The months with the highest UV index are May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, November and December (UV index 6).
Average cloud cover in January
Arroyo, PR
- Average cloud cover in January: 34
The months with the most cloud cover are May and July (Cloud cover 40).
The month with the least cloud cover is February (Cloud cover 31).
Average visibility in January
Arroyo, 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).
Arroyo, Puerto Rico, USA
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