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
January, with an average high of 67.8°F (19.9°C) and a low of 52°F (11.1°C), signifies the coldest month of the year.Humidity
In Heathrow, the average relative humidity in January is 73%.Rainfall
In Heathrow, during January, the rain falls for 10.1 days and regularly aggregates up to 1.42" (36mm) of precipitation. In Heathrow, during the entire year, the rain falls for 185.5 days and collects up to 30.43" (773mm) of precipitation.Snowfall
January is the only month when snow falls. January is the month with the most snowfall. Snow falls for 0.1 days and accumulates 0.04" (1mm) of snow.Daylight
The average length of the day in January is 10h and 33min.On the first day of January, sunrise is at 7:18 am and sunset at 5:39 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 6:03 pm EST.
Sunshine
In Heathrow, the average sunshine in January is 6.3h.UV index
With an average maximum UV index of 4, January is the month with the lowest UV index. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A daily high UV index of 4 in January leads to these guidelines:
Heed the precautions - Suggestions to avoid sunburn are made. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
What is the temperature in January?
What is the average humidity in January?
How many days does it rain in January?
What is the snowiest month?
When does it start to snow in Heathrow?
How many hours of daylight does Heathrow have in January?
When are sunrise and sunset in January?
How long on average sun shines in January?
When is the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Heathrow, FL
- Average high temperature in January: 67.8°F
The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is January (67.8°F).
- Average low temperature in January: 52°F
The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is January (52°F).
Average pressure in January
Heathrow, FL
- Average pressure in January: 30.14"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed in January
Heathrow, FL
- Average wind speed in January: 6.6mph
The windiest months (with the highest average wind speed) are January, March and April (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).
Average humidity in January
Heathrow, FL
- Average humidity in January: 73%
The months with the highest relative humidity are August and September (77%).
The month with the lowest relative humidity is March (70%).
Average rainfall in January
Heathrow, FL
- Average rainfall in January: 1.42"
The wettest month (with the highest rainfall) is August (4.72").
The driest month (with the least rainfall) is March (1.18").
Average rainfall days in January
Heathrow, FL
- Average rainfall days in January: 10.1 days
The month with the highest number of rainy days is August (23.8 days).
The month with the least rainy days is January (10.1 days).
Average snowfall in January
Heathrow, FL
- Average snowfall in January: 0.04"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in January
Heathrow, FL
- Average snowfall days in January: 0.1 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in January /
Average sunshine in January
Heathrow, 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 18min).
- Average sunshine in January: 6h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 12min).
Average sunshine days in January
Heathrow, FL
- Average sunshine days in January: 17.4 days
The month with the most sunshine days is January (17.4 days).
The month with the least sunshine days is August (4.3 days).
Average UV index in January
Heathrow, 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
Heathrow, FL
- Average cloud cover in January: 34
The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is May (Cloud cover 27).
Average visibility in January
Heathrow, 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).
Heathrow, Florida, USA
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