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
The onset of October introduces a moderate change in Castalia's weather, with average high-temperatures falling from September's pleasant 71.1°F (21.7°C) to a refreshing 57°F (13.9°C). Throughout October, Castalia anticipates an average low-temperature of 41.4°F (5.2°C).Humidity
With an average relative humidity of 75%, October is the least humid month.Rainfall
In Castalia, during October, the rain falls for 11.6 days and regularly aggregates up to 2.52" (64mm) of precipitation. Throughout the year, in Castalia, there are 131 rainfall days, and 27.91" (709mm) of precipitation is accumulated.Snowfall
Months with snowfall in Castalia are January through May, October through December. October is the first month it typically snows. Throughout October, in the average 1.4 snowfall days, it receives 0.28" (7mm) of snow. Throughout the year, there are 52.3 snowfall days, and 21.26" (540mm) of snow is accumulated.Daylight
In Castalia, Iowa, the average length of the day in October is 11h and 1min.On the first day of October, sunrise is at 7:04 am and sunset at 6:47 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:59 pm CDT.
Sunshine
The average sunshine in October is 5.2h.UV index
In Castalia, the average daily maximum UV index in October is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high UV index of 2 in October translates into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. 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 October?
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?
What is the average length of the day in October?
When is the sunrise / sunset in October?
How long on average sun shines in October?
What is the UV index reading in October?
Average temperature in October
Castalia, IA
- Average high temperature in October: 57°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in October: 41.4°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in October
Castalia, IA
- Average pressure in October: 29.99"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in October
Castalia, IA
- Average wind speed in October: 9.4mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in October
Castalia, IA
- Average humidity in October: 75%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (75%).
Average rainfall in October
Castalia, IA
- Average rainfall in October: 2.52"
The wettest month (with the highest rainfall) is June (4.33").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in October
Castalia, IA
- Average rainfall days in October: 11.6 days
The month with the highest number of rainy days is June (17.7 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in October
Castalia, IA
- Average snowfall in October: 0.28"
The month with the highest snowfall is February (5.16").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
Castalia, IA
- Average snowfall days in October: 1.4 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Castalia, IA
- Average daylight in October: 11h and 0min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in October: 5h and 1min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in October
Castalia, IA
- Average sunshine days in October: 16.6 days
The month with the most sunshine days is September (17 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in October
Castalia, IA
- Average UV index in October: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in October
Castalia, IA
- Average cloud cover in October: 41
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in October
Castalia, IA
- Average visibility in October: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
Castalia, Iowa, USA
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