Temperatures in December
It's cold in December in Rainier with an average temperature of 8°C. Temperatures this month range from a low of 6°C to a high of 9°C. At night, you can expect temperatures between -1°C and 4°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Rainier in December. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of December
The month of December starts in Rainier with cold temperatures, averaging around 9°C during the day and nights close to 3°C. Plenty of days with a chance of precipitation.
Mid-December
By mid-December, the average daytime temperature drops to around 8°C, with nights close to 3°C. The chance of precipitation is high during this period.
End of December
By the end of December, the average daytime temperature in Rainier will be around 7°C, with nights close to 2°C. There’s a significant chance of many days with precipitation.
Precipitation in December
In December, there is an average of 251 mm of precipitation, spread over 18 days. Of the total precipitation, about 12 cm falls as snow in December. The wind speed is around 3 Bft, mostly coming from the Southeast.
Across the whole month, the average precipitation chance is 59% per day. Though that seems frequent, the weather’s variable. There are also a few days with lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in December for Rainier. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Rainier in December |
London | ||
|---|---|---|---|
 Average Temperature |
8°C | 9°C | |
 High Temp |
9°C | 11°C | |
| Low Temp |
6°C | 8°C | |
 Total Precipitation |
251 mm | 67 mm | |
| Rainy Days |
18 days | 10 days | |
 Total Snowfall |
12 cm | 1,2 cm | |
| Snowy Days |
6 days | 1 day | |
November
UV index
The UV index is a maximum of 2 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
Is December a good time to visit Rainier?
After some sun? Then December isn’t the best time to be in Rainier. There’s too much chance of rain this month.
Temperature records for Rainier in December
With 19°C, Rainier hit the highest temperature in the last 10 years in December 2014. The lowest daytime temperature in this month was -5°C in 2021. The extreme night temperatures ranged from a low of -10°C to a high of 12°C.
Check out the climate of Rainier for all months and discover the best travel time
Daily Temperature in December in Rainier
This chart shows the average daily temperatures, both day and night, for each day in December in Rainier, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in December in Rainier
The chart below shows the average daily precipitation in December for Rainier, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for December, you can expect around 18 days of rain in Rainier.
Daily Snowfall in December in Rainier
This chart shows the average daily snowfall in December in Rainier, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in December.
Daily UV Index in December in Rainier
This chart shows the average daily UV index in December in Rainier, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in December in Rainier Over the Years
This chart shows the average temperature in December in Rainier, measured in degrees Celsius, over the past years.
Total Precipitation in December in Rainier Over the Years
This chart shows the average precipitation in December in Rainier, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in December in Rainier per year
This chart shows the average snowfall in December in Rainier, measured in centimetres, over the past years.
Daily climate in December for Rainier
Click on a specific day in December for detailed info on the typical weather on that day in Rainier. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December in Rainier
Have you been to Rainier in December?
Share your weather experience in December in Rainier.
Average Weather in Rainier by Month
Click on a month below to see detailed weather info for Rainier. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
