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 proves to be the coldest month, recording an average maximum temperature of 29.8°F (-1.2°C) and a minimum temperature of 16.7°F (-8.5°C).Humidity
January is the most humid month, with an average relative humidity of 81%.Rainfall
January is the month with the least rainfall. Rain falls for 2.8 days and accumulates 0.39" (10mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In January, it is snowing for 8.4 days. Throughout January, 2.09" (53mm) of snow is accumulated. In Long Valley, during the entire year, snow falls for 38.8 days and aggregates up to 16.1" (409mm) of snow.Daylight
In Long Valley, the average length of the day in January is 9h and 24min.On the first day of January, sunrise is at 7:18 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 4:55 pm MST.
Sunshine
January and February, with an average of 5.2h of sunshine, are months with the least sunshine.UV index
In January, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 2 during January leads to these instructions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest in Long Valley?
How cold is January?
What is the most humid month?
What is the average humidity in January in Long Valley?
What is the driest month?
How many days does it rain in January?
How much does it snow in January?
What is the average length of the day in January?
When are sunrise and sunset in January?
What is the month with the least sunshine?
How many hours of sunshine does Long Valley have in January?
What is the UV index intensity in January?
Average temperature in January
Long Valley, SD
- Average high temperature in January: 29.8°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in January: 16.7°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in January
Long Valley, SD
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in January
Long Valley, SD
- Average wind speed in January: 10.4mph
The windiest month (with the highest average wind speed) is April (12.1mph).
The calmest month (with the lowest average wind speed) is February (10.1mph).
Average humidity in January
Long Valley, SD
- Average humidity in January: 81%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is September (47%).
Average rainfall in January
Long Valley, SD
- Average rainfall in January: 0.39"
The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in January
Long Valley, SD
- Average rainfall days in January: 2.8 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is February (2.6 days).
Average snowfall in January
Long Valley, SD
- Average snowfall in January: 2.09"
The month with the highest snowfall is February (3.15").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Long Valley, SD
- Average snowfall days in January: 8.4 days
The month with the highest number of snowfall days is February (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Long Valley, 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: 5h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).
Average sunshine days in January
Long Valley, SD
- Average sunshine days in January: 20.6 days
The month with the most sunshine days is December (21.1 days).
The months with the least sunshine days are April and June (14.1 days).
Average UV index in January
Long Valley, SD
- Average UV index in January: 2
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Long Valley, SD
- Average cloud cover in January: 46
The month with the most cloud cover is January (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 18).
Average visibility in January
Long Valley, 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).
Long Valley, South Dakota, USA
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