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 snowfall in December
- Average snowfall 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
Weather in December
Temperature
December's onset corresponds with a shift in the average high-temperature, moving from a frosty 48°F (8.9°C) in November to an icy 37.4°F (3°C). An average nighttime temperature of 27.5°F (-2.5°C) is observed in Saint Johns, Ohio, during December.Humidity
In Saint Johns, the average relative humidity in December is 83%.Rainfall
In Saint Johns, in December, it is raining for 11.3 days, with typically 2.05" (52mm) of accumulated precipitation. Throughout the year, in Saint Johns, there are 169.7 rainfall days, and 30.47" (774mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Saint Johns. In Saint Johns, in December, during 11.1 snowfall days, 2.76" (70mm) of snow is typically accumulated. In Saint Johns, during the entire year, snow falls for 49.6 days and aggregates up to 14.57" (370mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:41 am and sunset at 5:10 pm. On the last day of December, sunrise is at 7:59 am and sunset at 5:19 pm EST.
Sunshine
In Saint Johns, the average sunshine in December is 3.9h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Saint Johns. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 1 in December translates into the following instructions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Saint Johns in December?
What is the average humidity in December in Saint Johns?
How many days does it rain in December in Saint Johns?
How much does it snow in Saint Johns in December?
What is the month with the shortest days in Saint Johns?
How many hours of daylight does Saint Johns have in December?
What time are sunrise and sunset in December in Saint Johns?
How many hours of sunshine does Saint Johns have in December?
When is the lowest UV index in Saint Johns?
How high is the UV index in December in Saint Johns?
Average temperature in December
Saint Johns, OH
- Average high temperature in December: 37.4°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Saint Johns, OH
- Average pressure in December: 30.11"Hg
The months with the highest atmospheric pressure are January and November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Saint Johns, OH
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Saint Johns, OH
- Average humidity in December: 83%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Saint Johns, OH
- Average rainfall in December: 2.05"
The wettest month (with the highest rainfall) is May (3.74").
The driest month (with the least rainfall) is February (1.93").
Average rainfall days in December
Saint Johns, OH
- Average rainfall days in December: 11.3 days
The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Saint Johns, OH
- Average snowfall in December: 2.76"
The month with the highest snowfall is February (3.9").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Saint Johns, OH
- Average snowfall days in December: 11.1 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Saint Johns, OH
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Saint Johns, OH
- Average sunshine days in December: 12 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in December
Saint Johns, OH
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Saint Johns, OH
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in December
Saint Johns, OH
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are January, February, August and September (5mi).
Saint Johns, Ohio, USA
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