The climate in Johnstown during December can be summarized as cold and a little damp.
December is in the winter in Johnstown and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a freezing 4°C (39°F), whilst at night -5°C (23°F) is normal.
Daytime temperature | 3.8°C 38.8°F |
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Nightly temperature | -5°C 23.1°F |
Average temperature | -0.6°C 30.9°F |
Daily sunshine | 3 hrs |
Avg rainfall | 90 mm 3.5 ins |
Rainy days | 16 days |
Sea temperature | 6.9°C 44.4°F |
Humidity | 73% |
Windspeed | 16.2kph 10 mph |
On average December is the 4th driest month of the year in Johnstown with around 90mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 3 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Johnstown in December 2024.
Best places to visit in December
Hottest month: | July | 28.3°C 82.9°F |
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Driest month: | October | 78mm 3.1ins |
Sunniest month: | July | 8.9hrs |
Coldest month: | January | 1°C 33.8°F |
Wettest month: | July | 124mm 4.9ins |