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
October's onset brings a noticeable temperature drop, falling from a warm 74.3°F (23.5°C) in September to a moderate 59.9°F (15.5°C). Throughout the month of October, Keystone sees a steady low-temperature average of 44.1°F (6.7°C).Humidity
The least humid month is October, with an average relative humidity of 72%.Rainfall
In Keystone, during October, the rain falls for 10.1 days and regularly aggregates up to 2.17" (55mm) of precipitation. Throughout the year, there are 139 rainfall days, and 29.49" (749mm) 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 0.6 snowfall days, it receives 0.39" (10mm) of snow. Throughout the year, there are 39 snowfall days, and 16.69" (424mm) of snow is accumulated.Daylight
In Keystone, Iowa, the average length of the day in October is 11h and 4min.On the first day of October, sunrise is at 7:06 am and sunset at 6:49 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 6:03 pm CDT.
Sunshine
In Keystone, the average sunshine in October is 5.3h.UV index
The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 2 in October interprets into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. 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 is the usual temperature for Keystone in October?
What is the least humid month?
What is the average humidity in October?
How much does it rain in October?
When does it start to snow?
How many hours of daylight does Keystone have in October?
When are sunrise and sunset in October?
How long on average sun shines in October?
What is the month with the lowest UV index in Keystone?
What is the UV index intensity in October?
Average temperature in October
Keystone, IA
- Average high temperature in October: 59.9°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in October: 44.1°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in October
Keystone, IA
- Average pressure in October: 30"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in October
Keystone, IA
- Average wind speed in October: 9.8mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in October
Keystone, IA
- Average humidity in October: 72%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in October
Keystone, IA
- Average rainfall in October: 2.17"
The wettest month (with the highest rainfall) is May (4.61").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in October
Keystone, IA
- Average rainfall days in October: 10.1 days
The month with the highest number of rainy days is June (19.3 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in October
Keystone, IA
- Average snowfall in October: 0.39"
The month with the highest snowfall is January (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
Keystone, IA
- Average snowfall days in October: 0.6 days
The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Keystone, IA
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in October: 5h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in October
Keystone, IA
- Average sunshine days in October: 19.2 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is June (8.4 days).
Average UV index in October
Keystone, IA
- Average UV index in October: 2
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in October
Keystone, IA
- Average cloud cover in October: 39
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in October
Keystone, IA
- Average visibility in October: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
Keystone, Iowa, USA
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