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 sea temperature 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
Portmore's coldest months, January and February, record an average high-temperature of 27.3°C (81.1°F).Heat index
The heat index in January is appraised at a hot 30°C (86°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.Heat index's context suggests values are appropriate for shady areas and slight breezes. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Humidity
In Portmore, the average relative humidity in January is 80%.Rainfall
In January, in Portmore, the rain falls for 23.9 days. Throughout January, 52mm (2.05") of precipitation is accumulated. In Portmore, during the entire year, the rain falls for 310.9 days and collects up to 1286mm (50.63") of precipitation.Sea temperature
In Portmore, the average seawater temperature in January is 27.1°C (80.8°F).Note: Between 25°C (77°F) and 29°C (84.2°F), water temperature is typically considered very warm and pleasurable by everyone. Water activities at these temperatures are enjoyable for extended periods without discomfort.
Daylight
In Portmore, the average length of the day in January is 11h and 12min.On the first day of the month, sunrise is at 06:38 and sunset at 17:43. On the last day of January, in Portmore, sunrise is at 06:40 and sunset at 18:01 EST.
Sunshine
In January, the average sunshine is 6.8h.UV index
The months with the lowest UV index in Portmore are January through May, November and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 6 in January translates into the following instructions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Take note! Sand and water reflections strengthen the Sun's UV exposure.
Frequently asked questions
What is the coldest month in Portmore?
What is the temperature in January in Portmore?
What is the average humidity in January in Portmore?
How many days does it rain in January in Portmore?
How warm is the water in January in Portmore?
How many hours of daylight does Portmore have in January?
When are sunrise and sunset in January in Portmore?
How many hours of sunshine does Portmore have in January?
What is the month with the lowest UV index in Portmore?
What is the UV index intensity in January in Portmore?
Average temperature in January
Portmore, Jamaica
- Average high temperature in January: 27.3°C
The warmest month (with the highest average high temperature) is August (30.3°C).
The months with the lowest average high temperature are January and February (27.3°C).
- Average low temperature in January: 21.7°C
The month with the highest average low temperature is July (24.3°C).
The coldest month (with the lowest average low temperature) is February (21.6°C).
Average pressure in January
Portmore, 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
Portmore, Jamaica
- Average wind speed in January: 10.5km/h
The windiest month (with the highest average wind speed) is June (12.8km/h).
The calmest month (with the lowest average wind speed) is November (8.6km/h).
Average humidity in January
Portmore, Jamaica
- Average humidity in January: 80%
The month with the highest relative humidity is October (82%).
The month with the lowest relative humidity is March (78%).
Average rainfall in January
Portmore, Jamaica
- Average rainfall in January: 52mm
The wettest month (with the highest rainfall) is October (184mm).
The driest month (with the least rainfall) is February (44mm).
Average rainfall days in January
Portmore, Jamaica
- Average rainfall days in January: 23.9 days
The month with the highest number of rainy days is October (28.7 days).
The month with the least rainy days is February (22.1 days).
Average sea temperature in January
Portmore, Jamaica
- Average sea temperature in January: 27.1°C
The best month for swimming (with the highest average sea temperature) is September (29.5°C).
The coldest month (with the lowest average sea temperature) is February (26.9°C).
Average daylight in January /
Average sunshine in January
Portmore, 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 months with the most sunshine are August and September (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in January
Portmore, Jamaica
- Average sunshine days in January: 3.4 days
The month with the most sunshine days is January (3.4 days).
The month with the least sunshine days is August (0.3 days).
Average UV index in January
Portmore, Jamaica
- Average UV index in January: 6
The months with the highest UV index are June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, November and December (UV index 6).
Average cloud cover in January
Portmore, Jamaica
- Average cloud cover in January: 33
The month with the most cloud cover is June (Cloud cover 41).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in January
Portmore, Jamaica
- Average visibility in January: 10km
The months with the highest visibility are January, February, March, April, June, July, November and December (10km).
The months with the lowest visibility are May, August, September and October (9km).
Portmore, Jamaica
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