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
The onset of October coincides with a reduction in the average high-temperature, falling from a moderately hot 75.4°F (24.1°C) in September to a refreshing 61.7°F (16.5°C). Throughout October, Letts experiences a low-temperature average of 45.3°F (7.4°C).Humidity
With an average relative humidity of 71%, October is the least humid month.Rainfall
In Letts, during October, the rain falls for 11.8 days and regularly aggregates up to 2.6" (66mm) of precipitation. Throughout the year, there are 153.8 rainfall days, and 31.69" (805mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. October is the first month it typically snows. Throughout October, in the average 0.4 snowfall days, it receives 0.87" (22mm) of snow. In Letts, during the entire year, snow falls for 40.1 days and aggregates up to 16.38" (416mm) of snow.Daylight
The average length of the day in October in Letts is 11h and 5min.On the first day of October in Letts, sunrise is at 7:02 am and sunset at 6:46 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 6:00 pm CDT.
Sunshine
The average sunshine in October is 5.5h.UV index
The average daily maximum UV index in October in Letts is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: A typical high UV index of 3 in October suggests the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Frequently asked questions
What are the temperatures in Letts in October?
What is the least humid month in Letts?
What is the average humidity in October in Letts?
How many days does it rain in October in Letts?
When does it start to snow in Letts?
How many hours of daylight does Letts have in October?
When are sunrise and sunset in October in Letts?
How many hours of sunshine does Letts have in October?
How high is the UV index in October in Letts?
Average temperature in October
Letts, IA
- Average high temperature in October: 61.7°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in October: 45.3°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 (16.3°F).
Average pressure in October
Letts, IA
- Average pressure in October: 30.01"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in October
Letts, IA
- Average wind speed in October: 9.5mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in October
Letts, IA
- Average humidity in October: 71%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in October
Letts, IA
- Average rainfall in October: 2.6"
The wettest month (with the highest rainfall) is May (5").
The driest months (with the least rainfall) are February and December (1.46").
Average rainfall days in October
Letts, IA
- Average rainfall days in October: 11.8 days
The month with the highest number of rainy days is May (19.7 days).
The months with the least rainy days are January and February (6.3 days).
Average snowfall in October
Letts, IA
- Average snowfall in October: 0.87"
The month with the highest snowfall is January (4.92").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in October
Letts, IA
- Average snowfall days in October: 0.4 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Letts, IA
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in October: 5h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in October
Letts, IA
- Average sunshine days in October: 16.6 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (8.3 days).
Average UV index in October
Letts, IA
- Average UV index in October: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in October
Letts, IA
- Average cloud cover in October: 37
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in October
Letts, IA
- Average visibility in October: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Letts, Iowa, USA
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