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
Chelsea's transition into October marks a considerable drop in the average high-temperature, moving down from a warm 74.3°F (23.5°C) in September to a mild 56.3°F (13.5°C). October brings an average low-temperature of 40.1°F (4.5°C) to Chelsea.Humidity
In Chelsea, the average relative humidity in October is 64%.Rainfall
In October, the rain falls for 7.8 days. Throughout October, 1.61" (41mm) of precipitation is accumulated. Throughout the year, there are 97.2 rainfall days, and 18.35" (466mm) 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 2.1 snowfall days, it receives 0.51" (13mm) of snow. Throughout the year, in Chelsea, there are 54.8 snowfall days, and 19.13" (486mm) of snow is accumulated.Daylight
In October, the average length of the day is 10h and 56min.On the first day of the month, sunrise is at 7:34 am and sunset at 7:14 pm. On the last day of October, sunrise is at 8:13 am and sunset at 6:23 pm CDT.
Sunshine
In October, the average sunshine is 6.4h.UV index
In Chelsea, the average daily maximum UV index in October is 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 2 during October leads to these advisories:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in October in Chelsea?
What is the average humidity in October in Chelsea?
How many days does it rain in October in Chelsea?
When does it start snowing in Chelsea?
How many hours of daylight does Chelsea have in October?
When is the sunrise / sunset in October in Chelsea?
How long on average sun shines in October in Chelsea?
How high is the UV index in October in Chelsea?
Average temperature in October
Chelsea, SD
- Average high temperature in October: 56.3°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (20.7°F).
- Average low temperature in October: 40.1°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in October
Chelsea, SD
- Average pressure in October: 29.98"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 October
Chelsea, SD
- Average wind speed in October: 10.4mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).
Average humidity in October
Chelsea, SD
- Average humidity in October: 64%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are August and September (60%).
Average rainfall in October
Chelsea, SD
- Average rainfall in October: 1.61"
The wettest month (with the highest rainfall) is June (3.46").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in October
Chelsea, SD
- Average rainfall days in October: 7.8 days
The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is February (2 days).
Average snowfall in October
Chelsea, SD
- Average snowfall in October: 0.51"
The month with the highest snowfall is January (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
Chelsea, SD
- Average snowfall days in October: 2.1 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Chelsea, SD
- Average daylight in October: 10h and 5min
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 October: 6h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in October
Chelsea, SD
- Average sunshine days in October: 19.8 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is June (12.7 days).
Average UV index in October
Chelsea, SD
- Average UV index in October: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).
Average cloud cover in October
Chelsea, SD
- Average cloud cover in October: 35
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are July and August (Cloud cover 23).
Average visibility in October
Chelsea, SD
- Average visibility in October: 6mi
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).
Chelsea, South Dakota, USA
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