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
December
Weather in December
Temperature
December's arrival brings a modest temperature shift, moving from a warm 26.9°C (80.4°F) in November to a tropical 30°C (86°F). Upper Swan experiences a drastic reduction from day temperatures to an average low of 16.7°C (62.1°F) in December.Heat index
The heat index in December is computed to be a tropical 31°C (87.8°F). Constant activity during exposure could result in a state of weariness and possibly heat cramps.Heat index specifics point out values are for conditions of shade and a slight breeze. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Humidity
The average relative humidity in December in Upper Swan is 50%.Rainfall
The months with the least rainfall are March and December Rain falls for 5.2 days and accumulates 9mm (0.35") of rain.Daylight
With an average of 14h and 12min of daylight, December has the longest days of the year.On the first day of the month, sunrise is at 5:02 am and sunset at 7:06 pm. On the last day of December, in Upper Swan, sunrise is at 5:13 am and sunset at 7:24 pm AWST.
Sunshine
January and December, with an average of 11.5h of sunshine, are months with the most sunshine.UV index
In December, the average daily maximum UV index in Upper Swan is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 6 during December translates into the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is December in Upper Swan?
What is the average humidity in December in Upper Swan?
What is the driest month in Upper Swan?
How many days does it rain in December in Upper Swan?
When are the longest days in Upper Swan?
How many hours of daylight does Upper Swan have in December?
What time are sunrise and sunset in December in Upper Swan?
What is the month with the most sunshine in Upper Swan?
How long on average sun shines in December in Upper Swan?
How high is the UV index in December in Upper Swan?
Average temperature in December
Upper Swan, Australia
- Average high temperature in December: 30°C
The warmest month (with the highest average high temperature) is February (32°C).
The month with the lowest average high temperature is July (16.8°C).
- Average low temperature in December: 16.7°C
The month with the highest average low temperature is February (18.9°C).
The coldest month (with the lowest average low temperature) is August (8.5°C).
Average pressure in December
Upper Swan, Australia
- Average pressure in December: 1012.2mbar
The month with the highest atmospheric pressure is July (1020.7mbar).
The month with the lowest atmospheric pressure is January (1011mbar).
Average wind speed in December
Upper Swan, Australia
- Average wind speed in December: 12.4km/h
The windiest months (with the highest average wind speed) are January and February (12.6km/h).
The calmest months (with the lowest average wind speed) are May and July (10km/h).
Average humidity in December
Upper Swan, Australia
- Average humidity in December: 50%
The months with the highest relative humidity are July and August (78%).
The month with the lowest relative humidity is January (49%).
Average rainfall in December
Upper Swan, Australia
- Average rainfall in December: 9mm
The wettest month (with the highest rainfall) is June (51mm).
The driest months (with the least rainfall) are March and December (9mm).
Average rainfall days in December
Upper Swan, Australia
- Average rainfall days in December: 5.2 days
The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is February (4.8 days).
Average daylight in December /
Average sunshine in December
Upper Swan, Australia
- Average daylight in December: 14h and 1min
The month with the longest days is December (Average daylight: 14h and 12min).
The month with the shortest days is June (Average daylight: 10h and 6min).
- Average sunshine in December: 11h and 3min
The months with the most sunshine are January and December (Average sunshine: 11h and 30min).
The month with the least sunshine is August (Average sunshine: 5h and 42min).
Average sunshine days in December
Upper Swan, Australia
- Average sunshine days in December: 24.5 days
The month with the most sunshine days is December (24.5 days).
The month with the least sunshine days is July (15.1 days).
Average UV index in December
Upper Swan, Australia
- Average UV index in December: 6
The month with the highest UV index is February (UV index 7).
The months with the lowest UV index are May, June, July and August (UV index 4).
Average cloud cover in December
Upper Swan, Australia
- Average cloud cover in December: 16
The months with the most cloud cover are July and August (Cloud cover 41).
The month with the least cloud cover is January (Cloud cover 14).
Average visibility in December
Upper Swan, Australia
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, November and December (10km).
The months with the lowest visibility are May, June, July, August, September and October (9km).
