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
Onset of October comes with a temperature decline, the average high falling from a warm 77.2°F (25.1°C) in September to an enjoyable 63.9°F (17.7°C). Lerna experiences a mean temperature of 48.2°F (9°C) during October nights.Humidity
With an average relative humidity of 70%, October is the least humid month.Rainfall
In October, the rain falls for 11.1 days. Throughout October, 2.13" (54mm) of precipitation is accumulated. In Lerna, during the entire year, the rain falls for 148 days and collects up to 25.63" (651mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Lerna. October is the first month it typically snows in Lerna. Throughout October, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow. In Lerna, during the entire year, snow falls for 26.6 days and aggregates up to 7.01" (178mm) of snow.Daylight
In Lerna, Illinois, the average length of the day in October is 11h and 9min.On the first day of the month, sunrise is at 6:49 am and sunset at 6:35 pm. On the last day of October, in Lerna, sunrise is at 7:20 am and sunset at 5:52 pm CDT.
Sunshine
In October, the average sunshine is 6.3h.UV index
In October, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: An average UV index of 3 in October transforms into this advice:
Exercise prevention - Warding off sunburn is urged. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
What is the temperature in October in Lerna?
What is the least humid month in Lerna?
What is the average humidity in October in Lerna?
How many days does it rain in October in Lerna?
When does it start to snow in Lerna?
How many hours of daylight does Lerna have in October?
When are sunrise and sunset in October in Lerna?
How many hours of sunshine does Lerna have in October?
How high is the UV index in October in Lerna?
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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