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
Weather in January
Temperature
Temperature records mark January as the coldest month, with highs averaging 28.4°C (83.1°F) and lows at 20.5°C (68.9°F).Heat index
The heat index value for January is appraised at a hot 33°C (91.4°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.Heat index readings emphasize conditions of light breezes and shaded spots. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Humidity
In January, the average relative humidity 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
In Greenwich, the average length of the day in January is 11h and 11min.On the first day of January, sunrise is at 06:39 and sunset at 17:43. On the last day of the month, sunrise is at 06:41 and sunset at 18:01 EST.
Sunshine
In Greenwich, Jamaica, the average sunshine in January 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 vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In January, the average maximum UV index of 6 translates into the following recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Frequently asked questions
What time of the year is the coldest in Greenwich?
How hot does it get in Greenwich in January?
What is the average humidity in January in Greenwich?
What is the driest month in Greenwich?
How many days does it rain in January in Greenwich?
What is the average length of the day in January in Greenwich?
When is the sunrise / sunset in January in Greenwich?
How long on average sun shines in January in Greenwich?
What is the month with the lowest UV index in Greenwich?
How high is the UV index in January in Greenwich?
Average temperature in January
Greenwich, 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
Greenwich, 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
Greenwich, 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
Greenwich, 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
Greenwich, 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
Greenwich, 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
Greenwich, 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
Greenwich, 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
Greenwich, 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
Greenwich, 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
Greenwich, 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).
Greenwich, Jamaica
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