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 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
The coldest period tends to be January, when average temperatures fluctuate between a high of 42.8°F (6°C) and a low of 28.8°F (-1.8°C).Humidity
In January, the average relative humidity is 77%.Rainfall
In Portland, during January, the rain falls for 11.4 days and regularly aggregates up to 2.99" (76mm) of precipitation. Throughout the year, there are 177.4 rainfall days, and 44.61" (1133mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Portland, in January, during 5.3 snowfall days, 1.3" (33mm) of snow is typically accumulated. Throughout the year, there are 17.7 snowfall days, and 6.22" (158mm) of snow is accumulated.Daylight
In January, the average length of the day in Portland is 10h and 0min.On the first day of January, sunrise is at 6:58 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 5:10 pm CST.
Sunshine
In January, the average sunshine in Portland is 4.3h.UV index
The months with the lowest UV index in Portland, Tennessee, are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 2 during January translates into the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. To guard against the harmful effects of the Sun, minimize exposure during midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest in Portland?
How cold is it in Portland in January?
What is the average humidity in January in Portland?
How many days does it rain in January in Portland?
How many days does it snow in January in Portland?
What is the average length of the day in January in Portland?
When are sunrise and sunset in January in Portland?
How long on average sun shines in January in Portland?
When is the lowest UV index in Portland?
How high is the UV index in January in Portland?
Average temperature in January
Portland, TN
- Average high temperature in January: 42.8°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (42.8°F).
- Average low temperature in January: 28.8°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).
Average pressure in January
Portland, TN
- Average pressure in January: 30.17"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in January
Portland, TN
- Average wind speed in January: 8.2mph
The windiest month (with the highest average wind speed) is February (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in January
Portland, TN
- Average humidity in January: 77%
The months with the highest relative humidity are March, May and December (79%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in January
Portland, TN
- Average rainfall in January: 2.99"
The wettest month (with the highest rainfall) is July (5.39").
The driest month (with the least rainfall) is November (2.56").
Average rainfall days in January
Portland, TN
- Average rainfall days in January: 11.4 days
The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is November (9.7 days).
Average snowfall in January
Portland, TN
- Average snowfall in January: 1.3"
The month with the highest snowfall is February (1.69").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Portland, TN
- Average snowfall days in January: 5.3 days
The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Portland, TN
- Average daylight in January: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in January
Portland, TN
- Average sunshine days in January: 13.8 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is July (9.7 days).
Average UV index in January
Portland, TN
- Average UV index in January: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in January
Portland, TN
- Average cloud cover in January: 55
The month with the most cloud cover is February (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 32).
Average visibility in January
Portland, TN
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, May and July (5mi).
Portland, Tennessee, USA
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