August weather forecast
Harpers Ferry, IA

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Weather in August

August, the last month of the summer in Harpers Ferry, is another warm month, with an average temperature varying between 59.4°F (15.2°C) and 78.6°F (25.9°C).

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.
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Frequently asked questions

What is the temperature in August in Harpers Ferry?

In Harpers Ferry, 78.6°F (25.9°C) is the average high-temperature and 59.4°F (15.2°C) is the average low-temperature during August.

What is the average humidity in August in Harpers Ferry?

In Harpers Ferry, Iowa, the average relative humidity in August is 80%.

How many days does it rain in August in Harpers Ferry?

In August, in Harpers Ferry, the rain falls for 11.8 days. Throughout August, 1.77" (45mm) of precipitation is accumulated.

When it does not snow in Harpers Ferry?

In Harpers Ferry, snow does not fall in June through September.

What is the average length of the day in August in Harpers Ferry?

In August, the average day length in Harpers Ferry is 13h and 54min.

What time are sunrise and sunset in August in Harpers Ferry?

In August, on the first day of the month, sunrise is at 5:55 am and sunset at 8:26 pm. On the last day of the month, in Harpers Ferry, Iowa, sunrise is at 6:28 am and sunset at 7:40 pm CDT.

What month has the most sunshine in Harpers Ferry?

The month with the most sunshine in Harpers Ferry is August, with an average of 9.8h of sunshine.

How many hours of sunshine does Harpers Ferry have in August?

In Harpers Ferry, the average sunshine duration in August is 9.8h.

What is the UV index reading in August in Harpers Ferry?

In Harpers Ferry, Iowa, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Harpers Ferry, IA

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).

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Average pressure in August
Harpers Ferry, IA

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).

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Average wind speed in August
Harpers Ferry, IA

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).

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Average humidity in August
Harpers Ferry, IA

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%).

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Average rainfall in August
Harpers Ferry, IA

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").

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Average rainfall days in August
Harpers Ferry, IA

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).

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Average snowfall in August
Harpers Ferry, IA

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").

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Average snowfall days in August
Harpers Ferry, IA

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).

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Average daylight in August /
Average sunshine in August
Harpers Ferry, IA

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).

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Average sunshine days in August
Harpers Ferry, IA

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).

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Average UV index in August
Harpers Ferry, IA

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).

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Average cloud cover in August
Harpers Ferry, IA

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).

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Average visibility in August
Harpers Ferry, IA

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).

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Harpers Ferry, Iowa, USA

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