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
Donnan's shift into August sets the average high-temperature at a still warm 77.5°F (25.3°C), a figure that deviates only slightly from July's 79°F (26.1°C). In August, the nighttime temperature lowers to an average of 60.1°F (15.6°C).Humidity
In Donnan, the average relative humidity in August is 82%.Rainfall
In August, the rain falls for 14.1 days. Throughout August, 2.2" (56mm) of precipitation is accumulated. Throughout the year, in Donnan, there are 140.2 rainfall days, and 28.7" (729mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Donnan.Daylight
In August, the average length of the day is 13h and 53min.On the first day of the month, sunrise is at 5:59 am and sunset at 8:28 pm. On the last day of August, sunrise is at 6:31 am and sunset at 7:43 pm CDT.
Sunshine
The months with the most sunshine in Donnan, Iowa, are July and August, with an average of 9.9h of sunshine.UV index
In Donnan, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 5 in August translates into this advice:
Make use of precautions - It is urged to ward off sun damage. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Donnan in August?
What is the average humidity in August in Donnan?
How much does it rain in Donnan in August?
When it does not snow in Donnan?
How many hours of daylight does Donnan have in August?
What time are sunrise and sunset in August in Donnan?
What are the months with the most sunshine in Donnan?
How long on average sun shines in August in Donnan?
What is the UV index reading in August in Donnan?
Average temperature in August
Donnan, IA
- Average high temperature in August: 77.5°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (23.7°F).
- Average low temperature in August: 60.1°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (10.9°F).
Average pressure in August
Donnan, IA
- Average pressure in August: 29.96"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in August
Donnan, IA
- Average wind speed in August: 7.1mph
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 August
Donnan, IA
- Average humidity in August: 82%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is October (74%).
Average rainfall in August
Donnan, IA
- Average rainfall in August: 2.2"
The wettest month (with the highest rainfall) is June (4.45").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in August
Donnan, IA
- Average rainfall days in August: 14.1 days
The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in August
Donnan, IA
- Average snowfall in August: 0"
The month with the highest snowfall is February (5.59").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Donnan, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Donnan, 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 6min).
- Average sunshine in August: 9h and 5min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in August
Donnan, IA
- Average sunshine days in August: 13.7 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (8.9 days).
Average UV index in August
Donnan, IA
- Average UV index in August: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in August
Donnan, IA
- Average cloud cover in August: 31
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in August
Donnan, IA
- Average visibility in August: 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).
Donnan, Iowa, USA
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