August weather forecastMarion, IA
August
Weather in August
August continues the heat wave in Marion, Iowa, but temperatures begin to plateau. There is a noticeable drop in rainfall as summer reaches its zenith. Outdoor activities are still a favorite among residents, with plenty of daylight hours available for exploration or relaxation. Warm winds keep the climate suitable for casual outdoor events and venues. The descent into cooler autumn weather begins by the closing of August.Temperature
Marion's average high-temperature in August is a still moderately hot 79.3°F (26.3°C), marking an insignificant difference from the 80.2°F (26.8°C) of July. During August, Marion observes a consistent average nighttime temperature of 61.7°F (16.5°C).Humidity
The average relative humidity in August in Marion is 80%.Rainfall
In Marion, Iowa, in August, it is raining for 14 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, in Marion, there are 147.9 rainfall days, and 31.57" (802mm) of precipitation is accumulated.Snowfall
In Marion, snow does not fall in May through September.Daylight
In Marion, the average length of the day in August is 13h and 49min.On the first day of August in Marion, sunrise is at 6:00 am and sunset at 8:24 pm. On the last day of the month, sunrise is at 6:31 am and sunset at 7:41 pm CDT.
Sunshine
The months with the most sunshine in Marion are July and August, with an average of 9.8h of sunshine.UV index
The average daily maximum UV index in August in Marion, Iowa, is 5. 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: A daily maximum UV index of 5 in August translates into the following instructions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Avoiding the Sun during its peak radiation time around midday is a healthy practice. 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
Marion, IA
- Average high temperature in August: 79.3°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in August: 61.7°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 (14.2°F).
Average pressure in August
Marion, 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 (29.9"Hg).
Average wind speed in August
Marion, IA
- Average wind speed in August: 7mph
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 (7mph).
Average humidity in August
Marion, IA
- Average humidity in August: 80%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in August
Marion, IA
- Average rainfall in August: 2.09"
The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is January (1.34").
Average rainfall days in August
Marion, IA
- Average rainfall days in August: 14 days
The month with the highest number of rainy days is May (19 days).
The months with the least rainy days are January and February (5.2 days).
Average snowfall in August
Marion, IA
- Average snowfall in August: 0"
The month with the highest snowfall is January (5.79").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Marion, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Marion, 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 48min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in August
Marion, IA
- Average sunshine days in August: 13.8 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is June (8.1 days).
Average UV index in August
Marion, IA
- Average UV index in August: 5
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in August
Marion, IA
- Average cloud cover in August: 31
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in August
Marion, IA
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
