December weather forecastOttumwa, IA
December
Weather in December
The year wraps up with a full swing into winter in December. The temperature edges down to an average high of 35.1°F (1.7°C) and the city experiences an increased snowfall of about 1.57" (40mm). The Christmas season sprinkles a festive spirit over the freezing weather conditions. Despite the cold, Ottumwa remains warm and cosy, with its bundled up residents and holiday decorations. As the sun sets earlier in December, the town is lit up with holiday lights, signaling the end of the year and ushering a new one with hopes of brighter and warmer days.Temperature
Ottumwa's December weather shows a moderate shift in high-temperatures, falling from November's chilly 47.8°F (8.8°C) to a cold 35.1°F (1.7°C). Ottumwa experiences an average low-temperature of 23.9°F (-4.5°C) in the month of December.Humidity
In Ottumwa, the average relative humidity in December is 79%.Rainfall
In Ottumwa, in December, it is raining for 6.8 days, with typically 1.1" (28mm) of accumulated precipitation. Throughout the year, there are 134.5 rainfall days, and 27.17" (690mm) of precipitation is accumulated.Snowfall
Months with snowfall in Ottumwa are January through May, October through December. In Ottumwa, in December, snow falls for 6.5 days, with typically accumulated 1.57" (40mm) of snow. In Ottumwa, during the entire year, snow falls for 33.5 days and aggregates up to 14.17" (360mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Ottumwa, Iowa.On the first day of the month, sunrise is at 7:15 am and sunset at 4:42 pm. On the last day of December, in Ottumwa, sunrise is at 7:34 am and sunset at 4:51 pm CST.
Sunshine
In Ottumwa, Iowa, the average sunshine in December is 4.7h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Ottumwa. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: An average maximum UV index of 2 in December leads to these recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ottumwa, IA
- Average high temperature in December: 35.1°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in December: 23.9°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
Ottumwa, IA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Ottumwa, IA
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in December
Ottumwa, IA
- Average humidity in December: 79%
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Ottumwa, IA
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is May (4.02").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in December
Ottumwa, IA
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in December
Ottumwa, IA
- Average snowfall in December: 1.57"
The month with the highest snowfall is February (4.17").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Ottumwa, IA
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Ottumwa, IA
- Average daylight in December: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Ottumwa, IA
- Average sunshine days in December: 18.9 days
The month with the most sunshine days is December (18.9 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in December
Ottumwa, IA
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Ottumwa, IA
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in December
Ottumwa, 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).
