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 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
December
Weather in December
Temperature
December's weather records an average high-temperature of a still warm 28.3°C (82.9°F), showing little deviation from November. Rock River witnesses an average low-temperature of 20.8°C (69.4°F) throughout the month of December.Heat index
The heat index in December is calculated to be a tropical 33°C (91.4°F). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.Heat index details are generally centered around shaded locations and a mild breeze. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Humidity
In December, the average relative humidity is 82%.Rainfall
In December, the rain falls for 21.6 days. Throughout December, 48mm (1.89") of precipitation is accumulated. In Rock River, Jamaica, during the entire year, the rain falls for 279.6 days and collects up to 947mm (37.28") of precipitation.Daylight
With an average of 11h and 6min of daylight, December has the shortest days of the year in Rock River.On the first day of the month, sunrise is at 06:24 and sunset at 17:31. On the last day of December, in Rock River, sunrise is at 06:40 and sunset at 17:44 EST.
Sunshine
October and December, with an average of 6.9h of sunshine, are months with the least sunshine in Rock River.UV index
January through April, September through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the maximum UV index of 6 suggests these recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Rock River in December?
What is the average humidity in December in Rock River?
How much does it rain in Rock River in December?
What is the month with the shortest days in Rock River?
How many hours of daylight does Rock River have in December?
When is the sunrise / sunset in December in Rock River?
What are the months with the least sunshine in Rock River?
How long on average sun shines in December in Rock River?
When is the lowest UV index in Rock River?
What is the UV index reading in December in Rock River?
Average temperature in December
Rock River, Jamaica
- Average high temperature in December: 28.3°C
The warmest month (with the highest average high temperature) is August (31.1°C).
The month with the lowest average high temperature is January (27.8°C).
- Average low temperature in December: 20.8°C
The months with the highest average low temperature are July and August (23.3°C).
The coldest months (with the lowest average low temperature) are January and February (20°C).
Average pressure in December
Rock River, Jamaica
- Average pressure in December: 1014.3mbar
The month with the highest atmospheric pressure is January (1015.4mbar).
The month with the lowest atmospheric pressure is October (1011.4mbar).
Average wind speed in December
Rock River, Jamaica
- Average wind speed in December: 7.9km/h
The windiest month (with the highest average wind speed) is June (10.3km/h).
The calmest month (with the lowest average wind speed) is November (6.9km/h).
Average humidity in December
Rock River, Jamaica
- Average humidity in December: 82%
The month with the highest relative humidity is October (83%).
The month with the lowest relative humidity is July (78%).
Average rainfall in December
Rock River, Jamaica
- Average rainfall in December: 48mm
The wettest month (with the highest rainfall) is October (147mm).
The driest month (with the least rainfall) is January (33mm).
Average rainfall days in December
Rock River, Jamaica
- Average rainfall days in December: 21.6 days
The month with the highest number of rainy days is October (27.5 days).
The month with the least rainy days is June (20.1 days).
Average daylight in December /
Average sunshine in December
Rock River, Jamaica
- Average daylight in December: 11h and 1min
The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).
- Average sunshine in December: 6h and 5min
The month with the most sunshine is August (Average sunshine: 11h and 18min).
The months with the least sunshine are October and December (Average sunshine: 6h and 54min).
Average sunshine days in December
Rock River, Jamaica
- Average sunshine days in December: 4.2 days
The month with the most sunshine days is July (7.5 days).
The month with the least sunshine days is October (2.3 days).
Average UV index in December
Rock River, Jamaica
- Average UV index in December: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January, February, March, April, September, October, November and December (UV index 6).
Average cloud cover in December
Rock River, Jamaica
- Average cloud cover in December: 29
The month with the most cloud cover is June (Cloud cover 36).
The months with the least cloud cover are March, July, August, September and December (Cloud cover 29).
Average visibility in December
Rock River, Jamaica
- Average visibility in December: 8km
The months with the highest visibility are February, March, April, May, June, July, August, September and November (9km).
The months with the lowest visibility are January, October and December (8km).
