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
The month of January sees the lowest average temperatures, reaching 18.9°F (-7.3°C) at the peak and 5°F (-15°C) at the low.Humidity
The most humid month is January, with an average relative humidity of 91%.Rainfall
In Ortley, South Dakota, in January, during 2.5 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Ortley, during the entire year, the rain falls for 112.9 days and collects up to 22.09" (561mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Ortley, during January, snow falls for 15.1 days and regularly aggregates up to 4.45" (113mm) of snow. Throughout the year, in Ortley, there are 68.4 snowfall days, and 23.74" (603mm) of snow is accumulated.Daylight
The average length of the day in January in Ortley, South Dakota, is 9h and 13min.On the first day of January, sunrise is at 8:08 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 5:33 pm CST.
Sunshine
January has the least sunshine of the year in Ortley, with an average of 3.2h of sunshine.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. 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: In January, a daily maximum UV index of 1 leads to the following instructions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest in Ortley?
How cold is January in Ortley?
What is the most humid month in Ortley?
What is the average humidity in January in Ortley?
How much does it rain in Ortley in January?
How many days does it snow in January in Ortley?
How many hours of daylight does Ortley have in January?
When are sunrise and sunset in January in Ortley?
What is the month with the least sunshine in Ortley?
How many hours of sunshine does Ortley have in January?
What is the month with the lowest UV index in Ortley?
What is the UV index reading in January in Ortley?
Average temperature in January
Ortley, SD
- Average high temperature in January: 18.9°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (18.9°F).
- Average low temperature in January: 5°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 (5°F).
Average pressure in January
Ortley, SD
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in January
Ortley, SD
- Average wind speed in January: 11mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is July (8.7mph).
Average humidity in January
Ortley, SD
- Average humidity in January: 91%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is September (66%).
Average rainfall in January
Ortley, SD
- Average rainfall in January: 0.71"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is November (0.63").
Average rainfall days in January
Ortley, SD
- Average rainfall days in January: 2.5 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in January
Ortley, SD
- Average snowfall in January: 4.45"
The month with the highest snowfall is December (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Ortley, SD
- Average snowfall days in January: 15.1 days
The month with the highest number of snowfall days is January (15.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Ortley, SD
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January: 3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in January
Ortley, SD
- Average sunshine days in January: 14.3 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in January
Ortley, SD
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in January
Ortley, SD
- Average cloud cover in January: 66
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in January
Ortley, SD
- Average visibility in January: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Ortley, South Dakota, USA
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