Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December stands out as Grasmere's warmest month, with temperatures ranging between an average high of 27.5°C (81.5°F) and a low of 16.3°C (61.3°F).Heat index
The heat index value for December is estimated at 29°C (84.2°F). Persistently participating in activities during exposure may lead to fatigue and induce heat cramps.Be aware that heat index ratings are designed for shaded locations and minor breezes. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'real feel', joins air temperature with relative humidity to produce a temperature perception for humans. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Humidity
In December, the average relative humidity in Grasmere is 58%.Rainfall
The month with the most rainfall is December, when the rain falls for 16.9 days and typically aggregates up to 86mm (3.39") of precipitation.Daylight
December has the longest days of the year, with an average of 13h and 48min of daylight.On the first day of December in Grasmere, South Africa, sunrise is at 05:07 and sunset at 18:48. On the last day of the month, sunrise is at 05:18 and sunset at 19:04 SAST.
Sunshine
In December, the average sunshine is 11.3h.UV index
January, October through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.Note: In December, a daily maximum UV index of 6 leads to the following instructions:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Frequently asked questions
What part of the year is the hottest in Grasmere?
What are the temperatures in Grasmere in December?
What is the average humidity in December in Grasmere?
What is the rainiest month in Grasmere?
How many days does it rain in December in Grasmere?
When are the longest days in Grasmere?
What is the average length of the day in December in Grasmere?
When is the sunrise / sunset in December in Grasmere?
How many hours of sunshine does Grasmere have in December?
What is the month with the highest UV index in Grasmere?
What is the UV index intensity in December in Grasmere?
Average temperature in December
Grasmere, South Africa
- Average high temperature in December: 27.5°C
The warmest month (with the highest average high temperature) is December (27.5°C).
The month with the lowest average high temperature is July (17.7°C).
- Average low temperature in December: 16.3°C
The months with the highest average low temperature are January and December (16.3°C).
The coldest month (with the lowest average low temperature) is July (5.9°C).
Average pressure in December
Grasmere, South Africa
- Average pressure in December: 1013.3mbar
The month with the highest atmospheric pressure is July (1024.7mbar).
The month with the lowest atmospheric pressure is January (1013.1mbar).
Average wind speed in December
Grasmere, South Africa
- Average wind speed in December: 10.3km/h
The windiest month (with the highest average wind speed) is November (12km/h).
The calmest month (with the lowest average wind speed) is May (7.9km/h).
Average humidity in December
Grasmere, South Africa
- Average humidity in December: 58%
The months with the highest relative humidity are January and February (63%).
The month with the lowest relative humidity is September (33%).
Average rainfall in December
Grasmere, South Africa
- Average rainfall in December: 86mm
The wettest month (with the highest rainfall) is December (86mm).
The driest month (with the least rainfall) is July (0mm).
Average rainfall days in December
Grasmere, South Africa
- Average rainfall days in December: 16.9 days
The month with the highest number of rainy days is January (17.8 days).
The months with the least rainy days are July and August (0.8 days).
Average daylight in December /
Average sunshine in December
Grasmere, South Africa
- Average daylight in December: 13h and 5min
The month with the longest days is December (Average daylight: 13h and 48min).
The month with the shortest days is June (Average daylight: 10h and 30min).
- Average sunshine in December: 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 December
Grasmere, South Africa
- Average sunshine days in December: 11 days
The month with the most sunshine days is July (30.1 days).
The month with the least sunshine days is January (10.8 days).
Average UV index in December
Grasmere, South Africa
- Average UV index in December: 6
The months with the highest UV index are January, 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 December
Grasmere, South Africa
- Average cloud cover in December: 24
The month with the most cloud cover is January (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Grasmere, South Africa
- Average visibility in December: 10km
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).
Grasmere, South Africa
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