St. Helena weather in December (California, United States of America)
Thinking of visiting St. Helena in December? Check the weather first! Check out this detailed guide to the month’s weather conditions.
Temperatures
In December, St. Helena usually has moderate temperatures and heavy rainfall. The winter season is characteristic of December. Expect temperatures to climb to 14°C during the day, with nighttime readings dropping to 4°C. Expect the coolest temperatures of the year during December.
Precipitation
St. Helena in December usually receives heavy rainfall, averaging around 175 mm for the month. The month is marked by heavy rainfall, often coming down in intense bursts. Make sure to have a poncho to stay dry. Looking at the last 30 years, the data shows about 14 days with rain.Average sunshine
The month experiences a moderate amount of sunlight, with 160 hours hours. A nice balance between sunshine and clouds.If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit St. Helena. April, May, June, July, August, September and October typically offer the most agreeable circumstances. On the other hand, January, February and December tend to be characterized by conditions that may not be as optimal.
For an in-depth look at the yearly conditions, visit our specialized St. Helena climate page with graphs.
St. Helena, monthly averages in December
Min Temperature
4°C
Max Temperature
14°C
Chance of Rain
46%
Precipitation
175 mm
Rainy days
14 days
Sunshine
160 hours *
Percentage Sunshine
55% *
Where to go in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in this month?
Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly. Bring a rain jacket in case it rains during your stay.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Interested in more climate information?
This site provides you with all the information you need about the climate in St. Helena.
Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.
