Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
In December, the average high-temperature goes from a fresh 51.8°F (11°C) in November to a cold 42.1°F (5.6°C). Rocky Hill experiences an average nighttime temperature of 30.9°F (-0.6°C) in the month of December.Humidity
In December, the average relative humidity is 81%.Rainfall
In Rocky Hill, during December, the rain falls for 10 days and regularly aggregates up to 1.26" (32mm) of precipitation. In Rocky Hill, during the entire year, the rain falls for 124.7 days and collects up to 13.74" (349mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In December, it is snowing for 5.5 days. Throughout December, 0.75" (19mm) of snow is accumulated. Throughout the year, there are 26.7 snowfall days, and 4.37" (111mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December in Rocky Hill, sunrise is at 7:30 am and sunset at 5:08 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 5:18 pm EST.
Sunshine
In December, the average sunshine is 4h.UV index
The months with the lowest UV index in Rocky Hill are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average UV index of 2 in December transforms into this advice:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold during December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Rocky Hill have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index in Rocky Hill?
What is the UV index reading in December?
Average temperature in December
Rocky Hill, OH
- Average high temperature in December: 42.1°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in December: 30.9°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).
Average pressure in December
Rocky Hill, OH
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Rocky Hill, OH
- Average wind speed in December: 7mph
The windiest month (with the highest average wind speed) is February (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in December
Rocky Hill, OH
- Average humidity in December: 81%
The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are August and September (75%).
Average rainfall in December
Rocky Hill, OH
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is May (1.57").
The driest months (with the least rainfall) are September and November (0.75").
Average rainfall days in December
Rocky Hill, OH
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is November (6.5 days).
Average snowfall in December
Rocky Hill, OH
- Average snowfall in December: 0.75"
The month with the highest snowfall is February (1.3").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Rocky Hill, OH
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rocky Hill, OH
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Rocky Hill, OH
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (21.6 days).
The month with the least sunshine days is May (13.3 days).
Average UV index in December
Rocky Hill, OH
- Average UV index in December: 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, November and December (UV index 2).
Average cloud cover in December
Rocky Hill, OH
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Rocky Hill, OH
- Average visibility in December: 5mi
The months with the highest visibility are March, April, October and November (6mi).
The months with the lowest visibility are January, February, May, June, July, August, September and December (5mi).
Rocky Hill, Ohio, USA
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