December
Weather in December
December in Graz is characterized by the festive spirit, despite the cold temperatures ranging from -5°C at night to 2°C during the day. The city is bathed in the soft glow of Christmas lights, transforming it into a winter fairyland. December offers visitors a chance to experience the world-renowned Austrian Christmas markets, known for their unique crafts, delicious foods, and warming mulled wine. Despite the winter's chill, December in Graz is a magical experience that truly warms up the heart.
On the first day of December, sunrise is at 07:21 and sunset at 16:12. On the last day of the month, sunrise is at 07:42 and sunset at 16:20 CET.
Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Enhance your sun protection with tightly woven, yet airy clothing.
Temperature
Welcoming December, Graz observes a shift in the average high-temperature, falling from November's a frosty 7°C to a wintry 2°C. As November transitions into December, Graz sees a drop in the average high-temperature, transitioning from a frosty 7°C to a wintry 2°C. Graz experiences an average low-temperature reading of -5°C throughout December.Rainfall
In Graz, during December, the rain falls for 11 days and regularly aggregates up to 51mm of precipitation. In Graz, during the entire year, the rain falls for 146 days and collects up to 968mm of precipitation.Daylight
The month with the shortest days is December, with an average of 8h and 36min of daylight.On the first day of December, sunrise is at 07:21 and sunset at 16:12. On the last day of the month, sunrise is at 07:42 and sunset at 16:20 CET.
Sunshine
The months with the least sunshine are January and December, with an average of 2h of sunshine.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Enhance your sun protection with tightly woven, yet airy clothing.
Updated: Jun 16, 2025
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
Graz in December has an average high-temperature of 2°C and an average low-temperature of -5°C.
How much does it rain in December?
In Graz, in December, during 11 rainfall days, 51mm of precipitation is typically accumulated.
What is the month with the shortest days in Graz?
With an average of 8h and 36min of daylight, December has the shortest days of the year in Graz.
What is the average length of the day in December?
The average day length in December is 8h and 35min.
What time are sunrise and sunset in December?
On the first day of December, sunrise is at 07:21 and sunset at 16:12. On the last day of the month, sunrise is at 07:42 and sunset at 16:20 CET.
What is the month with the least sunshine in Graz?
The months with the least sunshine in Graz are January and December, with an average of 2h of sunshine.
How many hours of sunshine does Graz have in December?
In Graz, the average sunshine duration in December is 2h.
What are the months with the lowest UV index?
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1.
What is the UV index reading in December?
In Graz, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to Sun's UV rays.
Average temperature in December
Graz, Austria
- Average high temperature in December: 2°C
The warmest month (with the highest average high temperature) is July (24°C).
The month with the lowest average high temperature is January (0°C).
- Average low temperature in December: -5°C
The months with the highest average low temperature are July and August (12°C).
The coldest month (with the lowest average low temperature) is January (-7°C).
Average rainfall in December
Graz, Austria
- Average rainfall in December: 51mm
The wettest month (with the highest rainfall) is July (131mm).
The driest month (with the least rainfall) is January (40mm).
Average rainfall days in December
Graz, Austria
- Average rainfall days in December: 11 days
The months with the highest number of rainy days are May and June (15 days).
The month with the least rainy days is October (9 days).
Average daylight in December /
Average sunshine in December
Graz, Austria
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 2h
The month with the most sunshine is July (Average sunshine: 8h).
The months with the least sunshine are January and December (Average sunshine: 2h).
Average UV index in December
Graz, Austria
- Average UV index in December: 1
The month with the highest UV index is June (UV index 8).
The months with the lowest UV index are January, November and December (UV index 1).
