Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
January, characterized by an average high temperature of 26.1°F (-3.3°C) and a low temperature of 12.6°F (-10.8°C), is generally the coldest month.Humidity
The most humid month is January, with an average relative humidity of 86%.Rainfall
In January, in Iona, the rain falls for 4.8 days. Throughout January, 0.59" (15mm) of precipitation is accumulated. In Iona, during the entire year, the rain falls for 107.6 days and collects up to 17.83" (453mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In January, it is snowing for 11.7 days. Throughout January, 3.35" (85mm) of snow is accumulated. In Iona, during the entire year, snow falls for 50.9 days and aggregates up to 17.87" (454mm) of snow.Daylight
In January, the average length of the day is 9h and 23min.On the first day of the month, sunrise is at 8:10 am and sunset at 5:11 pm. On the last day of January, sunrise is at 7:55 am and sunset at 5:47 pm CST.
Sunshine
The month with the least sunshine is January, with an average of 4.7h of sunshine.UV index
The average daily maximum UV index in January in Iona is 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A daily high UV index of 2 in January leads to these guidelines:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
What are the coldest months in Iona?
How cold is it in Iona in January?
What is the most humid month in Iona?
What is the average humidity in January in Iona?
How much does it rain in Iona in January?
How many days does it snow in January in Iona?
How many hours of daylight does Iona have in January?
When are sunrise and sunset in January in Iona?
What is the month with the least sunshine in Iona?
How long on average sun shines in January in Iona?
What is the UV index intensity in January in Iona?
Average temperature in January
Iona, SD
- Average high temperature in January: 26.1°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in January: 12.6°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in January
Iona, SD
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in January
Iona, SD
- Average wind speed in January: 10.3mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is August (9.1mph).
Average humidity in January
Iona, SD
- Average humidity in January: 86%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is September (58%).
Average rainfall in January
Iona, SD
- Average rainfall in January: 0.59"
The wettest month (with the highest rainfall) is June (3.03").
The driest month (with the least rainfall) is November (0.55").
Average rainfall days in January
Iona, SD
- Average rainfall days in January: 4.8 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in January
Iona, SD
- Average snowfall in January: 3.35"
The month with the highest snowfall is February (3.66").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Iona, SD
- Average snowfall days in January: 11.7 days
The months with the highest number of snowfall days are January and February (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Iona, SD
- Average daylight in January: 9h and 2min
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 January: 4h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in January
Iona, SD
- Average sunshine days in January: 17.8 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is April (11.8 days).
Average UV index in January
Iona, SD
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in January
Iona, SD
- Average cloud cover in January: 49
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in January
Iona, SD
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Iona, South Dakota, USA
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