Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
Spillville experiences a transition to a still warm 77.2°F (25.1°C) in average high-temperatures with the arrival of August, not greatly differing from July's 78.4°F (25.8°C). Spillville's average low-temperature for the month of August records at a refreshing 59.4°F (15.2°C).Humidity
In August, the average relative humidity is 81%.Rainfall
In Spillville, Iowa, in August, it is raining for 14.9 days, with typically 2.6" (66mm) of accumulated precipitation. In Spillville, during the entire year, the rain falls for 149 days and collects up to 30.59" (777mm) of precipitation.Snowfall
In Spillville, snow does not fall in June through September.Daylight
In August, the average length of the day is 13h and 54min.On the first day of the month, sunrise is at 5:59 am and sunset at 8:29 pm. On the last day of August, sunrise is at 6:31 am and sunset at 7:43 pm CDT.
Sunshine
August has the most sunshine of the year, with an average of 9.8h of sunshine.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index in Spillville. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum UV index of 5 in August translates into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Spillville in August?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
What is the average length of the day in August?
When are sunrise and sunset in August?
What month has the most sunshine?
How long on average sun shines in August?
What is the month with the highest UV index?
What is the UV index reading in August?
Average temperature in August
Spillville, IA
- Average high temperature in August: 77.2°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (22.3°F).
- Average low temperature in August: 59.4°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (9.7°F).
Average pressure in August
Spillville, IA
- Average pressure in August: 29.96"Hg
The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in August
Spillville, IA
- Average wind speed in August: 7mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in August
Spillville, IA
- Average humidity in August: 81%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is October (76%).
Average rainfall in August
Spillville, IA
- Average rainfall in August: 2.6"
The wettest month (with the highest rainfall) is June (5.04").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in August
Spillville, IA
- Average rainfall days in August: 14.9 days
The months with the highest number of rainy days are May and June (20.3 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in August
Spillville, IA
- Average snowfall in August: 0"
The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Spillville, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Spillville, IA
- Average daylight in August: 13h and 5min
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 0min).
- Average sunshine in August: 9h and 5min
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 August
Spillville, IA
- Average sunshine days in August: 12.3 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (7.1 days).
Average UV index in August
Spillville, IA
- Average UV index in August: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in August
Spillville, IA
- Average cloud cover in August: 32
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 August
Spillville, IA
- Average visibility in August: 6mi
The months with the highest visibility are March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, July and December (5mi).
Spillville, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location