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
January
Weather in January
Temperature
In Castleton, the lowest temperatures are generally noted in January, averaging a high of 28.4°C (83.1°F) and a low of 20.5°C (68.9°F).Heat index
January's average heat index is computed to be a hot 33°C (91.4°F). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.Heat index determinations are made taking into account the shade and light air movements. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Humidity
The average relative humidity in January is 80%.Rainfall
The month with the least rainfall is January, when the rain falls for 19.4 days and typically collects 26mm (1.02") of precipitation.Daylight
The average length of the day in January is 11h and 11min.On the first day of January, sunrise is at 06:38 and sunset at 17:42. On the last day of the month, sunrise is at 06:40 and sunset at 18:00 EST.
Sunshine
In January, the average sunshine is 6.9h.UV index
The months with the lowest UV index are January through April, September, November and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 6 in January translates into this advice:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Castleton?
How hot is it in January?
What is the average humidity in January?
What is the driest month?
How many days does it rain in January?
How many hours of daylight does Castleton have in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Castleton have in January?
What are the months with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Castleton, Jamaica
- Average high temperature in January: 28.4°C
The warmest months (with the highest average high temperature) are July and August (31.7°C).
The month with the lowest average high temperature is January (28.4°C).
- Average low temperature in January: 20.5°C
The month with the highest average low temperature is August (23.8°C).
The coldest month (with the lowest average low temperature) is January (20.5°C).
Average pressure in January
Castleton, Jamaica
- Average pressure in January: 1015.5mbar
The month with the highest atmospheric pressure is January (1015.5mbar).
The month with the lowest atmospheric pressure is October (1011.5mbar).
Average wind speed in January
Castleton, Jamaica
- Average wind speed in January: 7.8km/h
The windiest month (with the highest average wind speed) is June (9km/h).
The calmest month (with the lowest average wind speed) is November (6.6km/h).
Average humidity in January
Castleton, Jamaica
- Average humidity in January: 80%
The months with the highest relative humidity are October, November and December (81%).
The months with the lowest relative humidity are March, July and August (77%).
Average rainfall in January
Castleton, Jamaica
- Average rainfall in January: 26mm
The wettest month (with the highest rainfall) is October (123mm).
The driest month (with the least rainfall) is January (26mm).
Average rainfall days in January
Castleton, Jamaica
- Average rainfall days in January: 19.4 days
The month with the highest number of rainy days is October (26.5 days).
The month with the least rainy days is February (19.2 days).
Average daylight in January /
Average sunshine in January
Castleton, Jamaica
- Average daylight in January: 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 January: 6h and 5min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in January
Castleton, Jamaica
- Average sunshine days in January: 6 days
The month with the most sunshine days is January (6 days).
The month with the least sunshine days is October (1.5 days).
Average UV index in January
Castleton, Jamaica
- Average UV index in January: 6
The months with the highest UV index are May, June, July, August and October (UV index 7).
The months with the lowest UV index are January, February, March, April, September, November and December (UV index 6).
Average cloud cover in January
Castleton, Jamaica
- Average cloud cover in January: 34
The month with the most cloud cover is June (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in January
Castleton, Jamaica
- Average visibility in January: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
