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 beginning of December marks a decrease in the average high-temperature, transitioning from a wintry 41.9°F (5.5°C) in November to a freezing cold 27.9°F (-2.3°C). During the month of December, Dorchester's nighttime temperature lowers to an average of 17.1°F (-8.3°C).Humidity
In Dorchester, the average relative humidity in December is 87%.Rainfall
In Dorchester, during December, the rain falls for 4.7 days and regularly aggregates up to 1.46" (37mm) of precipitation. In Dorchester, Iowa, during the entire year, the rain falls for 130.5 days and collects up to 26.5" (673mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Dorchester. In Dorchester, in December, snow falls for 11.1 days, with typically accumulated 4.37" (111mm) of snow. In Dorchester, during the entire year, snow falls for 51.4 days and aggregates up to 22.2" (564mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 0min of daylight.On the first day of December in Dorchester, sunrise is at 7:19 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:39 pm CST.
Sunshine
In Dorchester, Iowa, the average sunshine in December is 3.7h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In December, a regular UV index of 1 translates into these guidelines:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Frequently asked questions
How cold is December in Dorchester?
What is the average humidity in December in Dorchester?
How much does it rain in Dorchester in December?
How many days does it snow in December in Dorchester?
What is the month with the shortest days in Dorchester?
What is the average length of the day in December in Dorchester?
When is the sunrise / sunset in December in Dorchester?
How many hours of sunshine does Dorchester have in December?
What is the month with the lowest UV index in Dorchester?
How high is the UV index in December in Dorchester?
Average temperature in December
Dorchester, IA
- Average high temperature in December: 27.9°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (21.7°F).
- Average low temperature in December: 17.1°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (8.8°F).
Average pressure in December
Dorchester, IA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Dorchester, IA
- Average wind speed in December: 8.9mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in December
Dorchester, IA
- Average humidity in December: 87%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is October (76%).
Average rainfall in December
Dorchester, IA
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is June (4.61").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in December
Dorchester, IA
- Average rainfall days in December: 4.7 days
The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is February (3 days).
Average snowfall in December
Dorchester, IA
- Average snowfall in December: 4.37"
The month with the highest snowfall is February (5.71").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Dorchester, IA
- Average snowfall days in December: 11.1 days
The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Dorchester, IA
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 3h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Dorchester, IA
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is January (17.7 days).
The month with the least sunshine days is June (9.8 days).
Average UV index in December
Dorchester, IA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Dorchester, IA
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Dorchester, IA
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, October and November (6mi).
The months with the lowest visibility are January, February, March, July, August, September and December (5mi).
Dorchester, Iowa, USA
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