August weather forecastCalmar, IA
August
Weather in August
August sees a continuation of the summer weather with high temperatures and ample sunshine, but there's a mild decline from the peak of July. While the heat can still be intense, there's a perceptible change in the air as summer slowly starts to wind down. Rain showers make occasional appearances, providing brief respite from the heat. Nights become slightly cooler, adding a refreshing touch to the overall weather. It is the last dance of summer, as residents relish the sun-soaked days with family and friends.Temperature
The shift into August in Calmar uncovers an average high-temperature of a still moderately hot 77.2°F (25.1°C), subtly different from the previous month. Calmar's August nights cool down to an average low-temperature of 59.4°F (15.2°C).Humidity
In Calmar, the average relative humidity in August is 81%.Rainfall
In Calmar, during August, the rain falls for 14.9 days and regularly aggregates up to 2.6" (66mm) of precipitation. Throughout the year, there are 149 rainfall days, and 30.59" (777mm) of precipitation is accumulated.Snowfall
In Calmar, snow does not fall in June through September.Daylight
The average length of the day in August is 13h and 54min.On the first day of the month, sunrise is at 5:58 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
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. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index, 5 during August, leads to the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Direct Sun exposure should be minimized especially during midday when radiation is most intense. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Calmar, 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
Calmar, 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
Calmar, 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
Calmar, 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
Calmar, 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
Calmar, 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
Calmar, 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
Calmar, 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
Calmar, IA
- Average daylight in August: 13h and 54min
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 48min
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
Calmar, 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
Calmar, 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
Calmar, 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
Calmar, 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).
