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
As September transitions into October, Harrisburg sees a drop in the average high-temperature, transitioning from a moderately hot 80.8°F (27.1°C) to a refreshing 67.8°F (19.9°C). During the nights in October, Harrisburg experiences a consistent average temperature of 49.3°F (9.6°C).Humidity
October is the least humid month in Harrisburg, with an average relative humidity of 70%.Rainfall
In Harrisburg, in October, during 10.5 rainfall days, 2.64" (67mm) of precipitation is typically accumulated. Throughout the year, in Harrisburg, there are 158.6 rainfall days, and 36.02" (915mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Harrisburg. October is the first month it typically snows. Throughout October, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 17.7 snowfall days, and 6.57" (167mm) of snow is accumulated.Daylight
In October, the average length of the day in Harrisburg, Illinois, is 11h and 13min.On the first day of October, sunrise is at 6:50 am and sunset at 6:36 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 5:56 pm CDT.
Sunshine
In October, the average sunshine in Harrisburg, Illinois, is 6.7h.UV index
In Harrisburg, 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 unsafe exposure to UV radiation for the average person.Note: The maximum UV index, 3 during October, leads to the following recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
What are October temperatures in Harrisburg?
What is the least humid month in Harrisburg?
What is the average humidity in October in Harrisburg?
How much does it rain in Harrisburg in October?
When does it start snowing in Harrisburg?
What is the average length of the day in October in Harrisburg?
When are sunrise and sunset in October in Harrisburg?
How many hours of sunshine does Harrisburg have in October?
What is the UV index reading in October in Harrisburg?
Average temperature in October
Harrisburg, IL
- Average high temperature in October: 67.8°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in October: 49.3°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in October
Harrisburg, IL
- Average pressure in October: 30.04"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in October
Harrisburg, IL
- Average wind speed in October: 8mph
The windiest months (with the highest average wind speed) are January and February (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in October
Harrisburg, IL
- Average humidity in October: 70%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in October
Harrisburg, IL
- Average rainfall in October: 2.64"
The wettest month (with the highest rainfall) is April (4.8").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in October
Harrisburg, IL
- Average rainfall days in October: 10.5 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is November (9.7 days).
Average snowfall in October
Harrisburg, IL
- Average snowfall in October: 0.08"
The month with the highest snowfall is January (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in October
Harrisburg, IL
- Average snowfall days in October: 0.1 days
The month with the highest number of snowfall days is January (5.3 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
Harrisburg, IL
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in October: 6h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in October
Harrisburg, IL
- Average sunshine days in October: 19.5 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is May (9.9 days).
Average UV index in October
Harrisburg, IL
- Average UV index in October: 3
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in October
Harrisburg, IL
- Average cloud cover in October: 32
The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are June and September (Cloud cover 28).
Average visibility in October
Harrisburg, IL
- Average visibility in October: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Harrisburg, Illinois, USA
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