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
The shift from December to January is characterized by an average high-temperature of a still warm 27.8°C (82°F), not significantly different from the 28.6°C (83.5°F) of December. Roche Hirondelle's nighttime average temperature in January subtly descends to a still moderately hot 24.2°C (75.6°F) from the daily highs.Heat index
The heat index for January is appraised at a hot 32°C (89.6°F). Prolonged exposure and physical activity might induce exhaustion, potentially causing heat cramps.In terms of the heat index, values are set with light wind and shade conditions in mind. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', binds temperature metrics with humidity values to give a sense of the actual warmth. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
In January, the average relative humidity is 82%.Rainfall
In January, in Roche Hirondelle, the rain falls for 27.6 days. Throughout January, 161mm (6.34") of precipitation is accumulated. In Roche Hirondelle, during the entire year, the rain falls for 288 days and collects up to 1773mm (69.8") of precipitation.Daylight
In January, the average length of the day in Roche Hirondelle is 11h and 51min.On the first day of January, sunrise is at 06:42 and sunset at 18:31. On the last day of the month, sunrise is at 06:50 and sunset at 18:43 -03.
Sunshine
In January, the average sunshine is 7.2h.UV index
The months with the lowest UV index in Roche Hirondelle are January through June and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In January, the maximum UV index of 6 translates into these guidelines:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Frequently asked questions
What is the usual temperature for Roche Hirondelle in January?
What is the average humidity in January in Roche Hirondelle?
How much does it rain in Roche Hirondelle in January?
What is the average length of the day in January in Roche Hirondelle?
What time are sunrise and sunset in January in Roche Hirondelle?
How many hours of sunshine does Roche Hirondelle have in January?
When is the lowest UV index in Roche Hirondelle?
What is the UV index intensity in January in Roche Hirondelle?
Average temperature in January
Roche Hirondelle, French Guiana
- Average high temperature in January: 27.8°C
The warmest months (with the highest average high temperature) are September and October (30.9°C).
The month with the lowest average high temperature is February (27.5°C).
- Average low temperature in January: 24.2°C
The month with the highest average low temperature is November (25.1°C).
The coldest month (with the lowest average low temperature) is January (24.2°C).
Average pressure in January
Roche Hirondelle, French Guiana
- Average pressure in January: 1011.9mbar
The months with the highest atmospheric pressure are June and July (1013.1mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).
Average wind speed in January
Roche Hirondelle, French Guiana
- Average wind speed in January: 14.3km/h
The windiest month (with the highest average wind speed) is February (15.3km/h).
The calmest month (with the lowest average wind speed) is July (9.7km/h).
Average humidity in January
Roche Hirondelle, French Guiana
- Average humidity in January: 82%
The months with the highest relative humidity are February and May (84%).
The months with the lowest relative humidity are September and October (77%).
Average rainfall in January
Roche Hirondelle, French Guiana
- Average rainfall in January: 161mm
The wettest month (with the highest rainfall) is May (279mm).
The driest month (with the least rainfall) is September (29mm).
Average rainfall days in January
Roche Hirondelle, French Guiana
- Average rainfall days in January: 27.6 days
The month with the highest number of rainy days is May (29.6 days).
The months with the least rainy days are September and October (14.3 days).
Average daylight in January /
Average sunshine in January
Roche Hirondelle, French Guiana
- Average daylight in January: 11h and 5min
The month with the longest days is June (Average daylight: 12h and 24min).
The month with the shortest days is December (Average daylight: 11h and 48min).
- Average sunshine in January: 7h and 1min
The month with the most sunshine is September (Average sunshine: 9h and 18min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in January
Roche Hirondelle, French Guiana
- Average sunshine days in January: 1.4 days
The month with the most sunshine days is October (13.2 days).
The month with the least sunshine days is May (0.6 days).
Average UV index in January
Roche Hirondelle, French Guiana
- Average UV index in January: 6
The months with the highest UV index are July, August, September, October and November (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June and December (UV index 6).
Average cloud cover in January
Roche Hirondelle, French Guiana
- Average cloud cover in January: 50
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 25).
Average visibility in January
Roche Hirondelle, French Guiana
- Average visibility in January: 10km
The months with the highest visibility are January, February, March, April, August, September, October, November and December (10km).
The months with the lowest visibility are May, June and July (9km).
Roche Hirondelle, French Guiana
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