August weather forecastWaterloo, IA
August
Weather in August
August sees the continuation of summery weather patterns in Waterloo- warm temperatures, long days, and abundance of sunshine. Nevertheless, compared to July, there's a slight decrease in temperature, offering relief to residents. However, with 61°F (16.1°C) being the average low, it is the warmest month regarding low temperatures. Outdoor events are commonly held in August, taking advantage of the predominantly clear skies and lengthy daylight hours. While the humidity remains high, the frequency of rainfall decreases somewhat from the preceding month.Temperature
August's arrival brings an average high-temperature of a still moderately hot 78.6°F (25.9°C), demonstrating subtle variation from the preceding month. Waterloo experiences a mean low-temperature of 61°F (16.1°C) during August.Humidity
The average relative humidity in August is 82%.Rainfall
In Waterloo, Iowa, in August, it is raining for 13.3 days, with typically 1.97" (50mm) of accumulated precipitation. In Waterloo, during the entire year, the rain falls for 133.6 days and collects up to 28.27" (718mm) of precipitation.Snowfall
In Waterloo, snow does not fall in June through September.Daylight
In Waterloo, the average length of the day in August is 13h and 51min.On the first day of the month, sunrise is at 6:02 am and sunset at 8:28 pm. On the last day of August, in Waterloo, Iowa, sunrise is at 6:34 am and sunset at 7:44 pm CDT.
Sunshine
In Waterloo, the average sunshine in August is 9.7h.UV index
In August, the average daily maximum UV index in Waterloo is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: A maximum UV index of 5 in August translates into the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. 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
Average temperature in August
Waterloo, IA
- Average high temperature in August: 78.6°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in August: 61°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in August
Waterloo, IA
- Average pressure in August: 29.97"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
Waterloo, IA
- Average wind speed in August: 7mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in August
Waterloo, IA
- Average humidity in August: 82%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (72%).
Average rainfall in August
Waterloo, IA
- Average rainfall in August: 1.97"
The wettest month (with the highest rainfall) is June (4.29").
The driest months (with the least rainfall) are January and February (1.02").
Average rainfall days in August
Waterloo, IA
- Average rainfall days in August: 13.3 days
The month with the highest number of rainy days is June (18.1 days).
The month with the least rainy days is February (4 days).
Average snowfall in August
Waterloo, IA
- Average snowfall in August: 0"
The month with the highest snowfall is January (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Waterloo, 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
Waterloo, IA
- Average daylight in August: 13h and 54min
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 6min).
- Average sunshine in August: 9h and 42min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in August
Waterloo, IA
- Average sunshine days in August: 15.8 days
The month with the most sunshine days is October (17.8 days).
The month with the least sunshine days is June (10 days).
Average UV index in August
Waterloo, IA
- Average UV index in August: 5
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in August
Waterloo, IA
- Average cloud cover in August: 31
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in August
Waterloo, IA
- Average visibility in August: 5mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
