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
With the onset of October, Herndon's average high-temperature experiences a noticeable drop, receding from September's warm 74.8°F (23.8°C) to a moderate 59.9°F (15.5°C). The nighttime temperature in Herndon, during October, averages of 43.9°F (6.6°C).Humidity
With an average relative humidity of 69%, October is the least humid month in Herndon.Rainfall
In Herndon, during October, the rain falls for 9.5 days and regularly aggregates up to 2.2" (56mm) of precipitation. Throughout the year, there are 125.7 rainfall days, and 26.5" (673mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Herndon. October is the first month it typically snows. Throughout October, in the average 0.6 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, in Herndon, there are 38.1 snowfall days, and 15.31" (389mm) of snow is accumulated.Daylight
In October, the average length of the day is 11h and 4min.On the first day of October in Herndon, Iowa, sunrise is at 7:15 am and sunset at 6:58 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 6:12 pm CDT.
Sunshine
In Herndon, the average sunshine in October is 5.7h.UV index
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In October, a regular UV index of 2 translates into these guidelines:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Frequently asked questions
What are October temperatures in Herndon?
What is the least humid month in Herndon?
What is the average humidity in October in Herndon?
How many days does it rain in October in Herndon?
When does it start to snow in Herndon?
How many hours of daylight does Herndon have in October?
What time are sunrise and sunset in October in Herndon?
How many hours of sunshine does Herndon have in October?
What is the month with the lowest UV index in Herndon?
What is the UV index reading in October in Herndon?
Average temperature in October
Herndon, IA
- Average high temperature in October: 59.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (26.8°F).
- Average low temperature in October: 43.9°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in October
Herndon, IA
- Average pressure in October: 30"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
Herndon, IA
- Average wind speed in October: 9.6mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in October
Herndon, IA
- Average humidity in October: 69%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (69%).
Average rainfall in October
Herndon, IA
- Average rainfall in October: 2.2"
The wettest month (with the highest rainfall) is May (4.06").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in October
Herndon, IA
- Average rainfall days in October: 9.5 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is February (3.4 days).
Average snowfall in October
Herndon, IA
- Average snowfall in October: 0.12"
The month with the highest snowfall is January (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
Herndon, IA
- Average snowfall days in October: 0.6 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Herndon, IA
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in October: 5h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in October
Herndon, IA
- Average sunshine days in October: 19.2 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in October
Herndon, IA
- Average UV index in October: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in October
Herndon, IA
- Average cloud cover in October: 36
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and September (Cloud cover 30).
Average visibility in October
Herndon, IA
- Average visibility in October: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Herndon, Iowa, USA
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