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
August brings an average high-temperature of a still warm 80.8°F (27.1°C), showing a slight difference from July's 82.9°F (28.3°C). During August, the temperature tends to dip to an average of 60.8°F (16°C) at night.Heat index
August's average heat index is calculated to be a tropical 86°F (30°C). If one endures exposure and continues to be active, it might result in tiredness and heat cramps.In terms of the heat index, values are set with light wind and shade conditions in mind. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
In August, the average relative humidity is 76%.Rainfall
In Merrill, in August, during 12.9 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. Throughout the year, there are 112 rainfall days, and 15.71" (399mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Merrill, the average length of the day in August is 13h and 52min.On the first day of the month, sunrise is at 6:17 am and sunset at 8:45 pm. On the last day of August, sunrise is at 6:49 am and sunset at 8:00 pm CDT.
Sunshine
In August, the average sunshine is 9.9h.UV index
In August, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The average daily UV index of 5 in August transforms into the following instructions:
Adopt protective measures - It is advised to guard against sun damage. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are August temperatures in Merrill?
What is the average humidity in August?
How much does it rain in August?
When it does not snow?
What is the average length of the day in August?
When is the sunrise / sunset in August?
How many hours of sunshine does Merrill have in August?
What is the UV index intensity in August?
Average temperature in August
Merrill, IA
- Average high temperature in August: 80.8°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in August: 60.8°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure in August
Merrill, IA
- Average pressure in August: 29.95"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in August
Merrill, IA
- Average wind speed in August: 8mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in August
Merrill, IA
- Average humidity in August: 76%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (66%).
Average rainfall in August
Merrill, IA
- Average rainfall in August: 1.77"
The wettest month (with the highest rainfall) is June (2.48").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in August
Merrill, IA
- Average rainfall days in August: 12.9 days
The month with the highest number of rainy days is June (16.5 days).
The months with the least rainy days are February and December (2.6 days).
Average snowfall in August
Merrill, IA
- Average snowfall in August: 0"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Merrill, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Merrill, 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 month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in August
Merrill, IA
- Average sunshine days in August: 15.3 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is June (11.9 days).
Average UV index in August
Merrill, IA
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Merrill, IA
- Average cloud cover in August: 30
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in August
Merrill, IA
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Merrill, Iowa, USA
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