August weather forecastDenison, IA
August
Weather in August
August, the last month of the summer in Denison, is another warm month, with an average temperature varying between 79.7°F (26.5°C) and 61.7°F (16.5°C).Temperature
The transition into August marks the average high-temperature at a still warm 79.7°F (26.5°C), differing minimally from July's 81.7°F (27.6°C). Throughout August, an average low-temperature of 61.7°F (16.5°C) is experienced in Denison.Humidity
In Denison, the average relative humidity in August is 80%.Rainfall
In Denison, Iowa, during August, the rain falls for 13.7 days and regularly aggregates up to 2.6" (66mm) of precipitation. In Denison, during the entire year, the rain falls for 123 days and collects up to 24.72" (628mm) of precipitation.Snowfall
In Denison, snow does not fall in June through September.Daylight
In August, the average length of the day is 13h and 49min.On the first day of August in Denison, sunrise is at 6:15 am and sunset at 8:39 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 7:56 pm CDT.
Sunshine
In Denison, the average sunshine in August is 9.5h.UV index
In August, the average daily maximum UV index in Denison is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 5 in August, converts into the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Denison, IA
- Average high temperature in August: 79.7°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in August: 61.7°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (14°F).
Average pressure in August
Denison, IA
- Average pressure in August: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in August
Denison, IA
- Average wind speed in August: 7.6mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity in August
Denison, IA
- Average humidity in August: 80%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are April and October (68%).
Average rainfall in August
Denison, IA
- Average rainfall in August: 2.6"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in August
Denison, IA
- Average rainfall days in August: 13.7 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is February (3 days).
Average snowfall in August
Denison, IA
- Average snowfall in August: 0"
The month with the highest snowfall is February (3.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Denison, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Denison, IA
- Average daylight in August: 13h and 48min
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 August: 9h and 30min
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 12min).
Average sunshine days in August
Denison, IA
- Average sunshine days in August: 15 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is June (11.9 days).
Average UV index in August
Denison, IA
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in August
Denison, IA
- Average cloud cover in August: 32
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in August
Denison, IA
- Average visibility in August: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
