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's arrival registers an average high-temperature of a still warm 79.2°F (26.2°C), closely aligning with the temperature of the previous month. During August, Marshalltown witnesses a consistent average low-temperature of 61.2°F (16.2°C).Humidity
In August, the average relative humidity in Marshalltown, Iowa, is 82%.Rainfall
In Marshalltown, in August, during 12.8 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. In Marshalltown, during the entire year, the rain falls for 118.2 days and collects up to 16.18" (411mm) of precipitation.Snowfall
In Marshalltown, Iowa, snow does not fall in June through September.Daylight
The average length of the day in August is 13h and 49min.On the first day of the month, sunrise is at 6:05 am and sunset at 8:30 pm. On the last day of August, sunrise is at 6:36 am and sunset at 7:46 pm CDT.
Sunshine
In August, the average sunshine in Marshalltown is 9.7h.UV index
The average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 5 in August translates into this advice:
Guard yourself - An obligation to protect skin and eyes from harm exists. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in August in Marshalltown?
What is the average humidity in August in Marshalltown?
How many days does it rain in August in Marshalltown?
When it does not snow in Marshalltown?
What is the average length of the day in August in Marshalltown?
What time are sunrise and sunset in August in Marshalltown?
How many hours of sunshine does Marshalltown have in August?
What is the UV index intensity in August in Marshalltown?
Average temperature in August
Marshalltown, IA
- Average high temperature in August: 79.2°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (25.7°F).
- Average low temperature in August: 61.2°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).
Average pressure in August
Marshalltown, IA
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in August
Marshalltown, IA
- Average wind speed in August: 7.1mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in August
Marshalltown, IA
- Average humidity in August: 82%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (72%).
Average rainfall in August
Marshalltown, IA
- Average rainfall in August: 1.54"
The wettest month (with the highest rainfall) is June (2.56").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in August
Marshalltown, IA
- Average rainfall days in August: 12.8 days
The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in August
Marshalltown, IA
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.93").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Marshalltown, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Marshalltown, IA
- Average daylight in August: 13h and 5min
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 4min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in August
Marshalltown, IA
- Average sunshine days in August: 15.2 days
The month with the most sunshine days is December (20.6 days).
The month with the least sunshine days is June (12.2 days).
Average UV index in August
Marshalltown, 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, October, November and December (UV index 2).
Average cloud cover in August
Marshalltown, IA
- Average cloud cover in August: 32
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in August
Marshalltown, IA
- Average visibility in August: 5mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Marshalltown, Iowa, USA
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