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 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
In Toa Alta, the lowest average temperatures are observed in January, with a high of 79.9°F (26.6°C) and a low of 73.6°F (23.1°C).Humidity
In January, the average relative humidity is 78%.Rainfall
In Toa Alta, during January, the rain falls for 14.2 days and regularly aggregates up to 1.26" (32mm) of precipitation. Throughout the year, there are 223.5 rainfall days, and 27.95" (710mm) of precipitation is accumulated.Daylight
In Toa Alta, the average length of the day in January is 11h and 10min.On the first day of the month, sunrise is at 6:56 am and sunset at 5:59 pm. On the last day of January, sunrise is at 6:58 am and sunset at 6:18 pm AST.
Sunshine
The average sunshine in January is 8.8h.UV index
The months with the lowest UV index are January through April and December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.Note: The daily maximum UV index of 6 in January interprets into the following advice:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
What are January temperatures?
What is the average humidity in January?
How many days does it rain in January?
What is the average length of the day in January?
When are sunrise and sunset in January?
How many hours of sunshine does Toa Alta have in January?
When is the lowest UV index?
How high is the UV index in January?
Average temperature in January
Toa Alta, PR
- Average high temperature in January: 79.9°F
The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is January (79.9°F).
- Average low temperature in January: 73.6°F
The months with the highest average low temperature are August, September and October (78.4°F).
The coldest month (with the lowest average low temperature) is March (73°F).
Average pressure in January
Toa Alta, PR
- Average pressure in January: 30.02"Hg
The months with the highest atmospheric pressure are January and February (30.02"Hg).
The month with the lowest atmospheric pressure is October (29.9"Hg).
Average wind speed in January
Toa Alta, PR
- Average wind speed in January: 9.1mph
The windiest month (with the highest average wind speed) is July (10mph).
The calmest month (with the lowest average wind speed) is October (6.8mph).
Average humidity in January
Toa Alta, PR
- Average humidity in January: 78%
The months with the highest relative humidity are May, June, July and November (79%).
The month with the lowest relative humidity is March (76%).
Average rainfall in January
Toa Alta, PR
- Average rainfall in January: 1.26"
The wettest month (with the highest rainfall) is October (3.82").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in January
Toa Alta, PR
- Average rainfall days in January: 14.2 days
The month with the highest number of rainy days is October (24 days).
The months with the least rainy days are January and February (14.2 days).
Average daylight in January /
Average sunshine in January
Toa Alta, 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 0min).
- Average sunshine in January: 8h and 5min
The months with the most sunshine are May and June (Average sunshine: 10h and 48min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).
Average sunshine days in January
Toa Alta, PR
- Average sunshine days in January: 9.8 days
The month with the most sunshine days is January (9.8 days).
The months with the least sunshine days are October and November (3.5 days).
Average UV index in January
Toa Alta, PR
- Average UV index in January: 6
The months with the highest UV index are May, June, July, August, September, October and November (UV index 7).
The months with the lowest UV index are January, February, March, April and December (UV index 6).
Average cloud cover in January
Toa Alta, PR
- Average cloud cover in January: 31
The months with the most cloud cover are May, July and November (Cloud cover 34).
The month with the least cloud cover is September (Cloud cover 26).
Average visibility in January
Toa Alta, 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).
Toa Alta, Puerto Rico, USA
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