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
The changeover to December signals a significant decrease in the average high-temperature, dropping from a frosty 44.6°F (7°C) in November to a freezing cold 30°F (-1.1°C). The temperature lowers to an average of 19.6°F (-6.9°C) during December nights.Humidity
In Galva, the average relative humidity in December is 81%.Rainfall
In Galva, during December, the rain falls for 3.5 days and regularly aggregates up to 1.38" (35mm) of precipitation. Throughout the year, in Galva, there are 117.4 rainfall days, and 24.61" (625mm) of precipitation is accumulated.Snowfall
Months with snowfall in Galva, Iowa, are January through May, October through December. In Galva, in December, snow falls for 8 days, with typically accumulated 2.09" (53mm) of snow. In Galva, Iowa, during the entire year, snow falls for 39.4 days and aggregates up to 16.57" (421mm) of snow.Daylight
December has the shortest days of the year in Galva, Iowa, with an average of 9h and 6min of daylight.On the first day of December in Galva, sunrise is at 7:32 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:51 am and sunset at 4:58 pm CST.
Sunshine
In December, the average sunshine is 4.6h.UV index
In Galva, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the average person.Note: An average maximum UV index of 2 in December leads to these recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. To guard against the harmful effects of the Sun, minimize exposure during midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. 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 Galva in December?
What is the average humidity in December in Galva?
How much does it rain in Galva in December?
How many days does it snow in December in Galva?
What is the month with the shortest days in Galva?
What is the average length of the day in December in Galva?
When are sunrise and sunset in December in Galva?
How many hours of sunshine does Galva have in December?
What is the UV index reading in December in Galva?
Average temperature in December
Galva, IA
- Average high temperature in December: 30°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in December: 19.6°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in December
Galva, IA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Galva, IA
- Average wind speed in December: 10.6mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in December
Galva, IA
- Average humidity in December: 81%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April and October (67%).
Average rainfall in December
Galva, IA
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in December
Galva, IA
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is June (16.4 days).
The month with the least rainy days is February (2.5 days).
Average snowfall in December
Galva, IA
- Average snowfall in December: 2.09"
The month with the highest snowfall is February (4.37").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Galva, IA
- Average snowfall days in December: 8 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Galva, IA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Galva, IA
- Average sunshine days in December: 20.2 days
The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in December
Galva, IA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in December
Galva, IA
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in December
Galva, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Galva, Iowa, USA
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