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
With average temperatures fluctuating between a high of 36.1°F (2.3°C) and a low of 24.3°F (-4.3°C), January stands out as the coldest month.Humidity
In January, the average relative humidity is 76%.Rainfall
January is the month with the least rainfall. Rain falls for 5 days and accumulates 0.79" (20mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Rocky Hill, in January, snow falls for 5.4 days, with typically accumulated 1.26" (32mm) of snow. In Rocky Hill, during the entire year, snow falls for 18.5 days and aggregates up to 5.51" (140mm) of snow.Daylight
In Rocky Hill, the average length of the day in January is 9h and 43min.On the first day of January, sunrise is at 7:23 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:19 pm EST.
Sunshine
In Rocky Hill, the average sunshine in January is 4.6h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 2 during January translates into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is January?
What is the average humidity in January?
What is the driest month?
How much does it rain in January?
How many days does it snow in January in Rocky Hill?
What is the average length of the day in January?
When are sunrise and sunset in January?
How many hours of sunshine does Rocky Hill have in January?
What are the months with the lowest UV index?
How high is the UV index in January?
Average temperature in January
Rocky Hill, PA
- Average high temperature in January: 36.1°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in January: 24.3°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in January
Rocky Hill, PA
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
Rocky Hill, PA
- Average wind speed in January: 8.3mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in January
Rocky Hill, PA
- Average humidity in January: 76%
The months with the highest relative humidity are February and October (79%).
The months with the lowest relative humidity are April and July (73%).
Average rainfall in January
Rocky Hill, PA
- Average rainfall in January: 0.79"
The wettest month (with the highest rainfall) is August (1.89").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in January
Rocky Hill, PA
- Average rainfall days in January: 5 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is January (5 days).
Average snowfall in January
Rocky Hill, PA
- Average snowfall in January: 1.26"
The month with the highest snowfall is March (1.57").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in January
Rocky Hill, PA
- Average snowfall days in January: 5.4 days
The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Rocky Hill, PA
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in January
Rocky Hill, PA
- Average sunshine days in January: 20.3 days
The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is June (13.3 days).
Average UV index in January
Rocky Hill, PA
- 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, March, November and December (UV index 2).
Average cloud cover in January
Rocky Hill, PA
- Average cloud cover in January: 47
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in January
Rocky Hill, PA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Rocky Hill, Pennsylvania, USA
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