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 yearly peak temperatures occur in January and December, averaging a high-temperature of 27.3°C (81.1°F).Heat index
January's mean heat index is calculated to be 29°C (84.2°F). Remaining active during long-lasting exposure could cause fatigue, leading to heat cramps.It is important to note that the heat index values are for shaded areas and light wind scenarios. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Humidity
The months with the highest humidity in Lewisham, South Africa, are January and February, with an average relative humidity of 64%.Rainfall
January is the month with the most rainfall. Rain falls for 19.8 days and accumulates 90mm (3.54") of precipitation.Daylight
The average length of the day in January in Lewisham is 13h and 34min.On the first day of the month, sunrise is at 05:19 and sunset at 19:04. On the last day of January, sunrise is at 05:42 and sunset at 19:01 SAST.
Sunshine
In January, the average sunshine is 11.4h.UV index
January, February, October through December, with an average maximum UV index of 6, are months with the highest UV index in Lewisham. A UV Index value of 6 to 7 symbolizes a high health hazard 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:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Frequently asked questions
What time of the year is the hottest in Lewisham?
What is the usual temperature for Lewisham in January?
What is the most humid month in Lewisham?
What is the average humidity in January in Lewisham?
What is the rainiest month in Lewisham?
How many days does it rain in January in Lewisham?
What is the average length of the day in January in Lewisham?
When is the sunrise / sunset in January in Lewisham?
How long on average sun shines in January in Lewisham?
When is the highest UV index in Lewisham?
What is the UV index intensity in January in Lewisham?
Average temperature in January
Lewisham, South Africa
- Average high temperature in January: 27.3°C
The warmest months (with the highest average high temperature) are January and December (27.3°C).
The months with the lowest average high temperature are June and July (17.8°C).
- Average low temperature in January: 16.5°C
The month with the highest average low temperature is December (16.6°C).
The coldest month (with the lowest average low temperature) is July (6.1°C).
Average pressure in January
Lewisham, South Africa
- Average pressure in January: 1012.9mbar
The month with the highest atmospheric pressure is July (1024.6mbar).
The month with the lowest atmospheric pressure is January (1012.9mbar).
Average wind speed in January
Lewisham, South Africa
- Average wind speed in January: 8.9km/h
The windiest month (with the highest average wind speed) is November (11.7km/h).
The calmest month (with the lowest average wind speed) is May (7.8km/h).
Average humidity in January
Lewisham, South Africa
- Average humidity in January: 64%
The months with the highest relative humidity are January and February (64%).
The month with the lowest relative humidity is September (34%).
Average rainfall in January
Lewisham, South Africa
- Average rainfall in January: 90mm
The wettest month (with the highest rainfall) is January (90mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in January
Lewisham, South Africa
- Average rainfall days in January: 19.8 days
The month with the highest number of rainy days is January (19.8 days).
The month with the least rainy days is July (1.2 days).
Average daylight in January /
Average sunshine in January
Lewisham, South Africa
- Average daylight in January: 13h and 4min
The month with the longest days is December (Average daylight: 13h and 42min).
The month with the shortest days is June (Average daylight: 10h and 30min).
- Average sunshine in January: 11h and 2min
The month with the most sunshine is October (Average sunshine: 11h and 48min).
The month with the least sunshine is August (Average sunshine: 7h and 24min).
Average sunshine days in January
Lewisham, South Africa
- Average sunshine days in January: 8.7 days
The month with the most sunshine days is July (29.3 days).
The month with the least sunshine days is December (8.5 days).
Average UV index in January
Lewisham, South Africa
- Average UV index in January: 6
The months with the highest UV index are January, February, October, November and December (UV index 6).
The months with the lowest UV index are May, June and July (UV index 4).
Average cloud cover in January
Lewisham, South Africa
- Average cloud cover in January: 26
The month with the most cloud cover is January (Cloud cover 26).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in January
Lewisham, South Africa
- Average visibility in January: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
Lewisham, South Africa
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