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
During August, the average high-temperature is a still moderately hot 78.6°F (25.9°C), maintaining a close resemblance to that of the preceding month. Harpers Ferry's average low-temperature during August nights is observed to be a mild 59.4°F (15.2°C).Humidity
In Harpers Ferry, the average relative humidity in August is 80%.Rainfall
In Harpers Ferry, in August, it is raining for 11.8 days, with typically 1.77" (45mm) of accumulated precipitation. Throughout the year, there are 124.7 rainfall days, and 22.56" (573mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Harpers Ferry.Daylight
In August, the average length of the day is 13h and 54min.On the first day of the month, sunrise is at 5:55 am and sunset at 8:26 pm. On the last day of August, sunrise is at 6:28 am and sunset at 7:40 pm CDT.
Sunshine
August has the most sunshine of the year, with an average of 9.8h of sunshine.UV index
The average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 5 during August translates into the following directions:
Undertake precautions - It is suggested to shield oneself from sunburn. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in August in Harpers Ferry?
What is the average humidity in August in Harpers Ferry?
How many days does it rain in August in Harpers Ferry?
When it does not snow in Harpers Ferry?
What is the average length of the day in August in Harpers Ferry?
What time are sunrise and sunset in August in Harpers Ferry?
What month has the most sunshine in Harpers Ferry?
How many hours of sunshine does Harpers Ferry have in August?
What is the UV index reading in August in Harpers Ferry?
Average temperature in August
Harpers Ferry, IA
- Average high temperature in August: 78.6°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (23.2°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 (10.6°F).
Average pressure in August
Harpers Ferry, IA
- Average pressure in August: 29.96"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in August
Harpers Ferry, IA
- Average wind speed in August: 6.6mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in August
Harpers Ferry, IA
- Average humidity in August: 80%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is October (76%).
Average rainfall in August
Harpers Ferry, IA
- Average rainfall in August: 1.77"
The wettest month (with the highest rainfall) is June (3.9").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in August
Harpers Ferry, IA
- Average rainfall days in August: 11.8 days
The month with the highest number of rainy days is June (18.6 days).
The month with the least rainy days is February (3.6 days).
Average snowfall in August
Harpers Ferry, IA
- Average snowfall in August: 0"
The month with the highest snowfall is February (3.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Harpers Ferry, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Harpers Ferry, 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 0min).
- Average sunshine in August: 9h and 5min
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 24min).
Average sunshine days in August
Harpers Ferry, IA
- Average sunshine days in August: 16.7 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is June (9.6 days).
Average UV index in August
Harpers Ferry, 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, November and December (UV index 1).
Average cloud cover in August
Harpers Ferry, 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
Harpers Ferry, IA
- Average visibility in August: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Harpers Ferry, Iowa, USA
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