Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
As Jefferson transitions into October, a noticeable drop in the average high-temperature is observed, falling from a moderately hot 76.1°F (24.5°C) in September to a refreshing 59.9°F (15.5°C). During October, the nighttime temperature averages to a frosty 43.3°F (6.3°C).Humidity
October is the least humid month in Jefferson, with an average relative humidity of 65%.Rainfall
In Jefferson, in October, it is raining for 9.5 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, there are 122 rainfall days, and 21.61" (549mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. October is the first month it typically snows. Throughout October, in the average 0.7 snowfall days, it receives 0.28" (7mm) of snow. In Jefferson, during the entire year, snow falls for 38 days and aggregates up to 13.23" (336mm) of snow.Daylight
In Jefferson, South Dakota, the average length of the day in October is 11h and 2min.On the first day of October, sunrise is at 7:24 am and sunset at 7:07 pm. On the last day of the month, sunrise is at 7:59 am and sunset at 6:19 pm CDT.
Sunshine
The average sunshine in October is 6.3h.UV index
In October, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 3 in October converts into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are October temperatures?
What is the least humid month?
What is the average humidity in October?
How many days does it rain in October?
When does it start snowing in Jefferson?
What is the average length of the day in October?
When are sunrise and sunset in October?
How many hours of sunshine does Jefferson have in October?
How high is the UV index in October?
Average temperature in October
Jefferson, SD
- Average high temperature in October: 59.9°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in October: 43.3°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 (13.1°F).
Average pressure in October
Jefferson, SD
- Average pressure in October: 30"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in October
Jefferson, SD
- Average wind speed in October: 10.2mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in October
Jefferson, SD
- Average humidity in October: 65%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (65%).
Average rainfall in October
Jefferson, SD
- Average rainfall in October: 1.85"
The wettest months (with the highest rainfall) are May and June (3.03").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in October
Jefferson, SD
- Average rainfall days in October: 9.5 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in October
Jefferson, SD
- Average snowfall in October: 0.28"
The month with the highest snowfall is January (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
Jefferson, SD
- Average snowfall days in October: 0.7 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Jefferson, SD
- Average daylight in October: 11h and 0min
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 October: 6h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in October
Jefferson, SD
- Average sunshine days in October: 18.7 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is June (9.7 days).
Average UV index in October
Jefferson, SD
- Average UV index in October: 3
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 October
Jefferson, SD
- Average cloud cover in October: 33
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in October
Jefferson, SD
- Average visibility in October: 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).
Jefferson, South Dakota, USA
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