January weather forecastRockham, SD
January
Weather in January
January, the same as December, in Rockham, South Dakota, is another subzero cold winter month, with an average temperature fluctuating between 22.5°F (-5.3°C) and 7.9°F (-13.4°C).Temperature
Temperature readings reach their annual highs in January, averaging 22.5°F (-5.3°C) and a minimum average of 7.9°F (-13.4°C).Humidity
January is the most humid month, with an average relative humidity of 88%.Rainfall
The month with the least rainfall is January, when the rain falls for 2.5 days and typically collects 0.51" (13mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In January, it is snowing for 9.8 days. Throughout January, 3.31" (84mm) of snow is accumulated. Throughout the year, there are 43.7 snowfall days, and 18.66" (474mm) of snow is accumulated.Daylight
In Rockham, the average length of the day in January is 9h and 15min.On the first day of the month, sunrise is at 8:13 am and sunset at 5:04 pm. On the last day of January, sunrise is at 7:56 am and sunset at 5:41 pm CST.
Sunshine
The month with the least sunshine is January, with an average of 4.1h of sunshine.UV index
The months with the lowest UV index are January and February, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: A daily maximum UV index of 1 in January translates into the following instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Rockham, SD
- Average high temperature in January: 22.5°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in January: 7.9°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure in January
Rockham, SD
- Average pressure in January: 30.16"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in January
Rockham, SD
- Average wind speed in January: 9.8mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (8.5mph).
Average humidity in January
Rockham, SD
- Average humidity in January: 88%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is September (60%).
Average rainfall in January
Rockham, SD
- Average rainfall in January: 0.51"
The wettest month (with the highest rainfall) is June (3.03").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in January
Rockham, SD
- Average rainfall days in January: 2.5 days
The month with the highest number of rainy days is June (15.1 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in January
Rockham, SD
- Average snowfall in January: 3.31"
The month with the highest snowfall is February (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Rockham, SD
- Average snowfall days in January: 9.8 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Rockham, SD
- Average daylight in January: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January: 4h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in January
Rockham, SD
- Average sunshine days in January: 19.5 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (12.2 days).
Average UV index in January
Rockham, SD
- Average UV index in January: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in January
Rockham, SD
- Average cloud cover in January: 55
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 22).
Average visibility in January
Rockham, 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).
