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
The arrival of January brings an average high-temperature of a moderately hot 29.7°C (85.5°F), nearly identical to December's 30.8°C (87.4°F). In January, Certitude encounters an average low-temperature of 20.8°C (69.4°F) during the night.Heat index
The heat index value during January is estimated at a very hot 39°C (102.2°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.Data suggests that the heat index is set for environments in shade and with a light wind. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.
Humidity
In Certitude, the average relative humidity in January is 87%.Rainfall
In January, in Certitude, the rain falls for 26.8 days. Throughout January, 86mm (3.39") of precipitation is accumulated. Throughout the year, there are 265.5 rainfall days, and 1078mm (42.44") of precipitation is accumulated.Daylight
In January, the average length of the day is 11h and 56min.On the first day of January, sunrise is at 06:39 and sunset at 18:33. On the last day of the month, sunrise is at 06:47 and sunset at 18:45 -03.
Sunshine
In January, the average sunshine is 4.9h.UV index
The months with the lowest UV index are January, March and December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: An average UV index of 5 in January transforms into this advice:
Exercise prevention - Protecting skin and eyes from harm is required. To protect against the Sun's most potent rays, avoid direct exposure around midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Certitude during January?
What is the average humidity in January in Certitude?
How many days does it rain in January in Certitude?
What is the average length of the day in January in Certitude?
What time are sunrise and sunset in January in Certitude?
How many hours of sunshine does Certitude have in January?
When is the lowest UV index in Certitude?
What is the UV index reading in January in Certitude?
Average temperature in January
Certitude, French Guiana
- Average high temperature in January: 29.7°C
The warmest month (with the highest average high temperature) is October (34.9°C).
The month with the lowest average high temperature is February (29.3°C).
- Average low temperature in January: 20.8°C
The month with the highest average low temperature is May (21.9°C).
The coldest months (with the lowest average low temperature) are August and September (20.5°C).
Average pressure in January
Certitude, French Guiana
- Average pressure in January: 1011.8mbar
The months with the highest atmospheric pressure are June and July (1013mbar).
The month with the lowest atmospheric pressure is November (1009.4mbar).
Average wind speed in January
Certitude, French Guiana
- Average wind speed in January: 5.1km/h
The windiest months (with the highest average wind speed) are February, March and November (5.3km/h).
The calmest month (with the lowest average wind speed) is July (4.2km/h).
Average humidity in January
Certitude, French Guiana
- Average humidity in January: 87%
The month with the highest relative humidity is May (90%).
The month with the lowest relative humidity is October (72%).
Average rainfall in January
Certitude, French Guiana
- Average rainfall in January: 86mm
The wettest month (with the highest rainfall) is May (192mm).
The driest month (with the least rainfall) is October (21mm).
Average rainfall days in January
Certitude, French Guiana
- Average rainfall days in January: 26.8 days
The months with the highest number of rainy days are January and March (26.8 days).
The month with the least rainy days is October (10.4 days).
Average daylight in January /
Average sunshine in January
Certitude, French Guiana
- Average daylight in January: 11h and 5min
The month with the longest days is June (Average daylight: 12h and 18min).
The month with the shortest days is December (Average daylight: 11h and 54min).
- Average sunshine in January: 4h and 5min
The months with the most sunshine are September and October (Average sunshine: 8h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in January
Certitude, French Guiana
- Average sunshine days in January: 2.3 days
The month with the most sunshine days is October (17.3 days).
The month with the least sunshine days is February (1.8 days).
Average UV index in January
Certitude, French Guiana
- Average UV index in January: 5
The months with the highest UV index are August, September, October and November (UV index 7).
The months with the lowest UV index are January, March and December (UV index 5).
Average cloud cover in January
Certitude, French Guiana
- Average cloud cover in January: 76
The month with the most cloud cover is February (Cloud cover 81).
The month with the least cloud cover is October (Cloud cover 44).
Average visibility in January
Certitude, French Guiana
- Average visibility in January: 6km
The month with the highest visibility is October (8km).
The month with the lowest visibility is May (5km).
