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
In Sinai, South Dakota, January is the month with the lowest recorded average temperatures, measuring a high of 20.7°F (-6.3°C) and a low of 7°F (-13.9°C).Humidity
The most humid month is January, with an average relative humidity of 90%.Rainfall
In Sinai, South Dakota, in January, it is raining for 3.2 days, with typically 0.71" (18mm) of accumulated precipitation. In Sinai, during the entire year, the rain falls for 125.5 days and collects up to 21.65" (550mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Sinai, South Dakota. In January, it is snowing for 14.4 days. Throughout January, 4.13" (105mm) of snow is accumulated. In Sinai, during the entire year, snow falls for 61.5 days and aggregates up to 21.38" (543mm) of snow.Daylight
In January, the average length of the day in Sinai is 9h and 19min.On the first day of the month, sunrise is at 8:03 am and sunset at 4:59 pm. On the last day of January, sunrise is at 7:47 am and sunset at 5:35 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 3.8h of sunshine.UV index
With an average maximum UV index of 1, January is the month with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In January, the maximum UV index of 1 translates into these guidelines:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. When the Sun is at its strongest around midday, find shade and limit exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest in Sinai?
How cold is it in Sinai in January?
What is the most humid month in Sinai?
What is the average humidity in January in Sinai?
How many days does it rain in January in Sinai?
How much does it snow in Sinai in January?
How many hours of daylight does Sinai have in January?
When is the sunrise / sunset in January in Sinai?
What is the month with the least sunshine in Sinai?
How long on average sun shines in January in Sinai?
What is the month with the lowest UV index in Sinai?
What is the UV index intensity in January in Sinai?
Average temperature in January
Sinai, SD
- Average high temperature in January: 20.7°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (20.7°F).
- Average low temperature in January: 7°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (7°F).
Average pressure in January
Sinai, 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 (29.86"Hg).
Average wind speed in January
Sinai, SD
- Average wind speed in January: 10.8mph
The windiest month (with the highest average wind speed) is April (11.5mph).
The calmest month (with the lowest average wind speed) is July (8.4mph).
Average humidity in January
Sinai, SD
- Average humidity in January: 90%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is October (68%).
Average rainfall in January
Sinai, SD
- Average rainfall in January: 0.71"
The wettest month (with the highest rainfall) is June (3.46").
The driest month (with the least rainfall) is November (0.67").
Average rainfall days in January
Sinai, SD
- Average rainfall days in January: 3.2 days
The month with the highest number of rainy days is June (19.8 days).
The month with the least rainy days is January (3.2 days).
Average snowfall in January
Sinai, SD
- Average snowfall in January: 4.13"
The month with the highest snowfall is February (4.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Sinai, SD
- Average snowfall days in January: 14.4 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Sinai, SD
- Average daylight in January: 9h and 2min
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: 3h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in January
Sinai, SD
- Average sunshine days in January: 15.8 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (8.3 days).
Average UV index in January
Sinai, SD
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Sinai, SD
- Average cloud cover in January: 59
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in January
Sinai, 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).
Sinai, South Dakota, USA
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