January weather forecastRalph, SD
January
Weather in January
January, like December, is another subzero cold winter month in Ralph, South Dakota, with an average temperature fluctuating between 12°F (-11.1°C) and 25.5°F (-3.6°C).Temperature
January stands out as Ralph's coldest month, with an average high-temperature of 25.5°F (-3.6°C) and a low-temperature of 12°F (-11.1°C).Humidity
The most humid month is January, with an average relative humidity of 84%.Rainfall
January and November are months with the least rain when the rain falls for 4.2 days and typically aggregates up to 0.51" (13mm) of rain.Snowfall
January through June, October through December are months with snowfall. In Ralph, South Dakota, in January, during 12.1 snowfall days, 3.03" (77mm) of snow is typically accumulated. Throughout the year, there are 67.2 snowfall days, and 24.69" (627mm) of snow is accumulated.Daylight
In Ralph, the average length of the day in January is 9h and 10min.On the first day of January in Ralph, sunrise is at 7:33 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:56 pm MST.
Sunshine
In January, the average sunshine is 4.7h.UV index
In January, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: In January, the maximum UV index of 2 transforms into these recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Ralph, SD
- Average high temperature in January: 25.5°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (25.5°F).
- Average low temperature in January: 12°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in January
Ralph, SD
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in January
Ralph, SD
- Average wind speed in January: 11.7mph
The windiest months (with the highest average wind speed) are January and October (11.7mph).
The calmest month (with the lowest average wind speed) is August (9.7mph).
Average humidity in January
Ralph, SD
- Average humidity in January: 84%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (50%).
Average rainfall in January
Ralph, SD
- Average rainfall in January: 0.51"
The wettest month (with the highest rainfall) is May (2.48").
The driest months (with the least rainfall) are January and November (0.51").
Average rainfall days in January
Ralph, SD
- Average rainfall days in January: 4.2 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is November (3 days).
Average snowfall in January
Ralph, SD
- Average snowfall in January: 3.03"
The month with the highest snowfall is February (4.84").
The months with the least snowfall are July, August and September (0").
Average snowfall days in January
Ralph, SD
- Average snowfall days in January: 12.1 days
The month with the highest number of snowfall days is February (13.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in January /
Average sunshine in January
Ralph, SD
- Average daylight in January: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January: 4h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in January
Ralph, SD
- Average sunshine days in January: 16.5 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is April (11.8 days).
Average UV index in January
Ralph, 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 November (UV index 1).
Average cloud cover in January
Ralph, SD
- Average cloud cover in January: 52
The months with the most cloud cover are January and February (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 20).
Average visibility in January
Ralph, SD
- Average visibility in January: 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).
