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
During the transition into October, Harmon observes a decrease in the average high-temperature, falling from a moderately hot 73.9°F (23.3°C) in September to a refreshing 60.6°F (15.9°C). During October, the nighttime temperature in Harmon averages of 44.6°F (7°C).Humidity
October is the least humid month in Harmon, with an average relative humidity of 73%.Rainfall
In Harmon, Illinois, in October, during 10.8 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. Throughout the year, in Harmon, there are 130.2 rainfall days, and 17.36" (441mm) 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 0.5 snowfall days, it receives 0.16" (4mm) of snow. In Harmon, Illinois, during the entire year, snow falls for 34.2 days and aggregates up to 7.87" (200mm) of snow.Daylight
In Harmon, the average length of the day in October is 11h and 4min.On the first day of the month, sunrise is at 6:55 am and sunset at 6:39 pm. On the last day of October, sunrise is at 7:30 am and sunset at 5:53 pm CDT.
Sunshine
The average sunshine in October in Harmon is 5.5h.UV index
The average daily maximum UV index in October in Harmon is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 2 in October interprets into the following recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are October temperatures in Harmon?
What is the least humid month in Harmon?
What is the average humidity in October in Harmon?
How much does it rain in Harmon in October?
When does it start snowing in Harmon?
How many hours of daylight does Harmon have in October?
What time are sunrise and sunset in October in Harmon?
How long on average sun shines in October in Harmon?
What is the UV index intensity in October in Harmon?
Average temperature in October
Harmon, IL
- Average high temperature in October: 60.6°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27.7°F).
- Average low temperature in October: 44.6°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in October
Harmon, IL
- Average pressure in October: 30.01"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in October
Harmon, IL
- Average wind speed in October: 9.1mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in October
Harmon, IL
- Average humidity in October: 73%
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in October
Harmon, IL
- Average rainfall in October: 1.65"
The wettest month (with the highest rainfall) is May (2.83").
The driest months (with the least rainfall) are January and February (0.75").
Average rainfall days in October
Harmon, IL
- Average rainfall days in October: 10.8 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in October
Harmon, IL
- Average snowfall in October: 0.16"
The month with the highest snowfall is January (2.56").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in October
Harmon, IL
- Average snowfall days in October: 0.5 days
The month with the highest number of snowfall days is January (10.2 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
Harmon, IL
- 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 3min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in October
Harmon, IL
- Average sunshine days in October: 18.6 days
The months with the most sunshine days are November and December (18.8 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in October
Harmon, IL
- Average UV index in October: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in October
Harmon, IL
- Average cloud cover in October: 40
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in October
Harmon, IL
- Average visibility in October: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Harmon, Illinois, USA
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