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
The month of January sees the lowest average temperatures, reaching 68.4°F (20.2°C) at the peak and 56.1°F (13.4°C) at the low.Humidity
The average relative humidity in January is 73%.Rainfall
In Port Saint John, during January, the rain falls for 11.8 days and regularly aggregates up to 1.54" (39mm) of precipitation. Throughout the year, there are 202 rainfall days, and 40.2" (1021mm) of precipitation is accumulated.Daylight
The average length of the day in January is 10h and 34min.On the first day of January in Port Saint John, sunrise is at 7:15 am and sunset at 5:37 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:01 pm EST.
Sunshine
January, November and December, with an average of 6.1h of sunshine, are months with the least sunshine.UV index
With an average maximum UV index of 4, January is the month with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 4 in January interprets into the following advice:
Be vigilant - Suggestions to stave off sun damage are provided. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
What is the average January temperature?
What is the average humidity in January?
How much does it rain in January?
How many hours of daylight does Port Saint John have in January?
When is the sunrise / sunset in January in Port Saint John?
What is the month with the least sunshine?
How many hours of sunshine does Port Saint John have in January?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Port Saint John, FL
- Average high temperature in January: 68.4°F
The warmest month (with the highest average high temperature) is August (88.7°F).
The month with the lowest average high temperature is January (68.4°F).
- Average low temperature in January: 56.1°F
The month with the highest average low temperature is August (77.9°F).
The coldest month (with the lowest average low temperature) is January (56.1°F).
Average pressure in January
Port Saint John, FL
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed in January
Port Saint John, FL
- Average wind speed in January: 8.8mph
The windiest months (with the highest average wind speed) are January and November (8.8mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in January
Port Saint John, FL
- Average humidity in January: 73%
The month with the highest relative humidity is August (79%).
The month with the lowest relative humidity is March (71%).
Average rainfall in January
Port Saint John, FL
- Average rainfall in January: 1.54"
The wettest month (with the highest rainfall) is August (6.81").
The driest month (with the least rainfall) is March (1.42").
Average rainfall days in January
Port Saint John, FL
- Average rainfall days in January: 11.8 days
The months with the highest number of rainy days are July and August (25.8 days).
The month with the least rainy days is February (10.8 days).
Average daylight in January /
Average sunshine in January
Port Saint John, FL
- Average daylight in January: 10h and 4min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in January: 6h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The months with the least sunshine are January, November and December (Average sunshine: 6h and 6min).
Average sunshine days in January
Port Saint John, FL
- Average sunshine days in January: 17.2 days
The months with the most sunshine days are January and March (17.2 days).
The month with the least sunshine days is August (2.3 days).
Average UV index in January
Port Saint John, FL
- Average UV index in January: 4
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).
Average cloud cover in January
Port Saint John, FL
- Average cloud cover in January: 35
The months with the most cloud cover are January, November and December (Cloud cover 35).
The month with the least cloud cover is May (Cloud cover 26).
Average visibility in January
Port Saint John, FL
- 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).
Port Saint John, Florida, USA
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