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 is the coldest month, exhibiting average temperatures of 26.8°F (-2.9°C) at the peak and 12.9°F (-10.6°C) at the base.Humidity
January is the most humid month in Napa Junction, with an average relative humidity of 85%.Rainfall
In Napa Junction, in January, during 3.4 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. Throughout the year, there are 117.9 rainfall days, and 21.93" (557mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Napa Junction, in January, snow falls for 9.7 days, with typically accumulated 2.6" (66mm) of snow. Throughout the year, there are 37.4 snowfall days, and 14.45" (367mm) of snow is accumulated.Daylight
In Napa Junction, the average length of the day in January is 9h and 27min.On the first day of the month, sunrise is at 8:00 am and sunset at 5:05 pm. On the last day of January, in Napa Junction, sunrise is at 7:45 am and sunset at 5:40 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 4.4h of sunshine.UV index
January is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 1 in January leads to these recommendations:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Enhance your sun protection with tightly woven, yet airy clothing. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
What time of the year is the coldest in Napa Junction?
How cold is it in Napa Junction in January?
What is the most humid month in Napa Junction?
What is the average humidity in January in Napa Junction?
How many days does it rain in January in Napa Junction?
How many days does it snow in January in Napa Junction?
What is the average length of the day in January in Napa Junction?
When are sunrise and sunset in January in Napa Junction?
What is the month with the least sunshine in Napa Junction?
How many hours of sunshine does Napa Junction have in January?
What is the month with the lowest UV index in Napa Junction?
What is the UV index intensity in January in Napa Junction?
Average temperature in January
Napa Junction, SD
- Average high temperature in January: 26.8°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (26.8°F).
- Average low temperature in January: 12.9°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (12.9°F).
Average pressure in January
Napa Junction, 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 (29.85"Hg).
Average wind speed in January
Napa Junction, SD
- Average wind speed in January: 10.6mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).
Average humidity in January
Napa Junction, SD
- Average humidity in January: 85%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (64%).
Average rainfall in January
Napa Junction, SD
- Average rainfall in January: 0.67"
The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is February (0.59").
Average rainfall days in January
Napa Junction, SD
- Average rainfall days in January: 3.4 days
The month with the highest number of rainy days is June (17.4 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in January
Napa Junction, SD
- Average snowfall in January: 2.6"
The month with the highest snowfall is December (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Napa Junction, SD
- Average snowfall days in January: 9.7 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Napa Junction, SD
- Average daylight in January: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in January
Napa Junction, SD
- Average sunshine days in January: 19.3 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (9.3 days).
Average UV index in January
Napa Junction, SD
- Average UV index in January: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Napa Junction, SD
- Average cloud cover in January: 52
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in January
Napa Junction, 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).
Napa Junction, South Dakota, USA
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