October weather forecastHerald, IL
October
Weather in October
October, like September, in Herald, Illinois, is another comfortable autumn month, with an average temperature varying between 49.6°F (9.8°C) and 67.1°F (19.5°C).Temperature
During Herald's transition into October, the average high-temperature lessens, moving from a moderately hot 79.5°F (26.4°C) in September to a refreshing 67.1°F (19.5°C). An average low-temperature of 49.6°F (9.8°C) is noted during the month of October.Humidity
October is the least humid month, with an average relative humidity of 69%.Rainfall
In Herald, during October, the rain falls for 6 days and regularly aggregates up to 0.71" (18mm) of precipitation. In Herald, during the entire year, the rain falls for 100.2 days and collects up to 8.7" (221mm) of precipitation.Snowfall
In Herald, snow does not fall in April through October.Daylight
The average length of the day in October is 11h and 12min.On the first day of October, sunrise is at 6:49 am and sunset at 6:35 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 5:54 pm CDT.
Sunshine
In October, the average sunshine is 6.8h.UV index
The average daily maximum UV index in October is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 3 in October, converts into the following recommendations:
Exercise prevention - Warding off sunburn is urged. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Herald, IL
- Average high temperature in October: 67.1°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in October: 49.6°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in October
Herald, 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
Herald, IL
- Average wind speed in October: 8.5mph
The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in October
Herald, IL
- Average humidity in October: 69%
The months with the highest relative humidity are May and July (79%).
The month with the lowest relative humidity is October (69%).
Average rainfall in October
Herald, IL
- Average rainfall in October: 0.71"
The wettest month (with the highest rainfall) is April (1.06").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days in October
Herald, IL
- Average rainfall days in October: 6 days
The month with the highest number of rainy days is May (11.9 days).
The month with the least rainy days is January (5 days).
Average snowfall in October
Herald, IL
- Average snowfall in October: 0"
The months with the highest snowfall are January and February (0.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in October
Herald, IL
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in October /
Average sunshine in October
Herald, IL
- Average daylight in October: 11h and 12min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in October: 6h and 48min
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 24min).
Average sunshine days in October
Herald, IL
- Average sunshine days in October: 23.4 days
The month with the most sunshine days is October (23.4 days).
The month with the least sunshine days is May (15.8 days).
Average UV index in October
Herald, 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, November and December (UV index 2).
Average cloud cover in October
Herald, 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 August (Cloud cover 27).
Average visibility in October
Herald, 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).
