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
January is the most humid month, with an average relative humidity of 91%.Rainfall
In January, the rain falls for 2.5 days. Throughout January, 0.71" (18mm) of precipitation is accumulated. Throughout the year, there are 112.9 rainfall days, and 22.09" (561mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Grenville, during January, snow falls for 15.1 days and regularly aggregates up to 4.45" (113mm) of snow. In Grenville, South Dakota, during the entire year, snow falls for 68.4 days and aggregates up to 23.74" (603mm) of snow.Daylight
The average length of the day in January is 9h and 11min.On the first day of January, sunrise is at 8:09 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 7:51 am and sunset at 5:34 pm CST.
Sunshine
The month with the least sunshine is January, with an average of 3.2h of sunshine.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 1 during January translates into the following guidance:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Take careful note! The UV radiation of the Sun can be nearly doubled by 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?
How cold is it in January?
What is the most humid month?
What is the average humidity in January in Grenville?
How many days does it rain in January?
How many days does it snow in January?
How many hours of daylight does Grenville have in January?
When are sunrise and sunset in January?
What is the month with the least sunshine?
How many hours of sunshine does Grenville have in January?
What is the month with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Grenville, 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
Grenville, 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
Grenville, 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
Grenville, 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
Grenville, 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
Grenville, 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
Grenville, 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
Grenville, 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
Grenville, 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
Grenville, 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
Grenville, 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
Grenville, 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
Grenville, 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).
Grenville, South Dakota, USA
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