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
Stepping into October, Lerna observes a temperature decline, with the average high falling from September's warm 77.2°F (25.1°C) to a refreshing 63.9°F (17.7°C). Lerna's temperature tends to fall to an average low of 48.2°F (9°C) during the nights of October.Humidity
With an average relative humidity of 70%, October is the least humid month.Rainfall
In Lerna, in October, during 11.1 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. Throughout the year, in Lerna, there are 148 rainfall days, and 25.63" (651mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Lerna. 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, in Lerna, there are 26.6 snowfall days, and 7.01" (178mm) of snow is accumulated.Daylight
In Lerna, the average length of the day in October is 11h and 9min.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 7:20 am and sunset at 5:52 pm CDT.
Sunshine
The average sunshine in October in Lerna is 6.3h.UV index
In Lerna, the average daily maximum UV index in October is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: A daily high UV index of 3 in October leads to these guidelines:
Put precautions into practice - Guidance to elude sunburn is provided. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Lerna 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 snowing?
How many hours of daylight does Lerna have in October?
When is the sunrise / sunset in October?
How many hours of sunshine does Lerna have in October?
What is the UV index intensity in October?
Average temperature in October
Lerna, IL
- Average high temperature in October: 63.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in October: 48.2°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in October
Lerna, IL
- Average pressure in October: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in October
Lerna, IL
- Average wind speed in October: 9.2mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in October
Lerna, IL
- Average humidity in October: 70%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in October
Lerna, IL
- Average rainfall in October: 2.13"
The wettest month (with the highest rainfall) is April (3.31").
The driest month (with the least rainfall) is February (1.3").
Average rainfall days in October
Lerna, IL
- Average rainfall days in October: 11.1 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in October
Lerna, IL
- Average snowfall in October: 0.08"
The month with the highest snowfall is December (2.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in October
Lerna, IL
- Average snowfall days in October: 0.1 days
The month with the highest number of snowfall days is January (8.1 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
Lerna, IL
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in October: 6h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in October
Lerna, IL
- Average sunshine days in October: 18.3 days
The month with the most sunshine days is October (18.3 days).
The month with the least sunshine days is July (10.6 days).
Average UV index in October
Lerna, IL
- Average UV index in October: 3
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in October
Lerna, IL
- Average cloud cover in October: 36
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in October
Lerna, 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).
Lerna, Illinois, USA
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