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, Mercer observes a decrease in the average high-temperature, falling from a moderately hot 75.6°F (24.2°C) in September to a comfortable 61.3°F (16.3°C). Mercer records an average nighttime low-temperature of 44.4°F (6.9°C) throughout October.Humidity
October is the least humid month, with an average relative humidity of 70%.Rainfall
In Mercer, in October, it is raining for 8.5 days, with typically 1.3" (33mm) of accumulated precipitation. In Mercer, during the entire year, the rain falls for 115.1 days and collects up to 19.21" (488mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. October is the first month it typically snows. Throughout October, in the average 0.7 snowfall days, it receives 0.24" (6mm) of snow. Throughout the year, there are 27.6 snowfall days, and 8.15" (207mm) of snow is accumulated.Daylight
In Mercer, Iowa, the average length of the day in October is 11h and 6min.On the first day of the month, sunrise is at 7:15 am and sunset at 7:00 pm. On the last day of October, sunrise is at 7:49 am and sunset at 6:15 pm CDT.
Sunshine
In October, the average sunshine in Mercer is 5.8h.UV index
In Mercer, the average daily maximum UV index in October is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 2 during October leads to these advisories:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in October in Mercer?
What is the least humid month?
What is the average humidity in October?
How many days does it rain in October?
When does it start snowing in Mercer?
How many hours of daylight does Mercer have in October?
When are sunrise and sunset in October?
How many hours of sunshine does Mercer have in October?
How high is the UV index in October?
Average temperature in October
Mercer, IA
- Average high temperature in October: 61.3°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in October: 44.4°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 (16°F).
Average pressure in October
Mercer, IA
- Average pressure in October: 30.01"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in October
Mercer, IA
- Average wind speed in October: 9.4mph
The windiest months (with the highest average wind speed) are March and April (10.5mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in October
Mercer, IA
- Average humidity in October: 70%
The months with the highest relative humidity are January and June (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall in October
Mercer, IA
- Average rainfall in October: 1.3"
The wettest month (with the highest rainfall) is June (3.74").
The driest month (with the least rainfall) is February (0.51").
Average rainfall days in October
Mercer, IA
- Average rainfall days in October: 8.5 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (3 days).
Average snowfall in October
Mercer, IA
- Average snowfall in October: 0.24"
The month with the highest snowfall is January (2.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in October
Mercer, IA
- Average snowfall days in October: 0.7 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Mercer, IA
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in October: 5h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in October
Mercer, IA
- Average sunshine days in October: 20.2 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is May (12 days).
Average UV index in October
Mercer, IA
- Average UV index in October: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in October
Mercer, IA
- Average cloud cover in October: 35
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July and September (Cloud cover 29).
Average visibility in October
Mercer, IA
- 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).
Mercer, Iowa, USA
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