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
Iona in October experiences a marked decrease in the average high-temperature, descending from September's warm 76.3°F (24.6°C) to a mild 58.6°F (14.8°C). The average temperature drops to an icy 42.4°F (5.8°C) during the night in the month of October.Humidity
In Iona, the average relative humidity in October is 62%.Rainfall
In Iona, during October, the rain falls for 7.8 days and regularly aggregates up to 1.14" (29mm) of precipitation. In Iona, during the entire year, the rain falls for 107.6 days and collects up to 17.83" (453mm) of precipitation.Snowfall
Months with snowfall in Iona are January through April, October through December. October is the first month it typically snows. Throughout October, in the average 1.6 snowfall days, it receives 0.59" (15mm) of snow. Throughout the year, there are 50.9 snowfall days, and 17.87" (454mm) of snow is accumulated.Daylight
In October, the average length of the day is 11h and 0min.On the first day of October, sunrise is at 7:36 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 8:12 am and sunset at 6:29 pm CDT.
Sunshine
In Iona, South Dakota, the average sunshine in October is 6.8h.UV index
The average daily maximum UV index in October is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In October, the average maximum UV index of 3 translates into the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in October?
What is the average humidity in October?
How many days does it rain in October?
When does it start to snow in Iona?
How many hours of daylight does Iona have in October?
When are sunrise and sunset in October?
How long on average sun shines in October?
What is the UV index reading in October in Iona?
Average temperature in October
Iona, SD
- Average high temperature in October: 58.6°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in October: 42.4°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in October
Iona, SD
- Average pressure in October: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in October
Iona, SD
- Average wind speed in October: 10.7mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is August (9.1mph).
Average humidity in October
Iona, SD
- Average humidity in October: 62%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is September (58%).
Average rainfall in October
Iona, SD
- Average rainfall in October: 1.14"
The wettest month (with the highest rainfall) is June (3.03").
The driest month (with the least rainfall) is November (0.55").
Average rainfall days in October
Iona, SD
- Average rainfall days in October: 7.8 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in October
Iona, SD
- Average snowfall in October: 0.59"
The month with the highest snowfall is February (3.66").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in October
Iona, SD
- Average snowfall days in October: 1.6 days
The months with the highest number of snowfall days are January and February (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Iona, SD
- Average daylight in October: 11h and 0min
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 October: 6h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in October
Iona, SD
- Average sunshine days in October: 19.9 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is April (11.8 days).
Average UV index in October
Iona, SD
- Average UV index in October: 3
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in October
Iona, SD
- Average cloud cover in October: 30
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in October
Iona, 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).
Iona, South Dakota, USA
Weather forecast for your location
2. Allow the app to use your location