August weather forecast
Delta, IA

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Weather in August

The last month of the summer, August, is also a moderately hot month in Delta, Iowa, with an average temperature ranging between min 62.8°F (17.1°C) and max 81.1°F (27.3°C).

Temperature

The shift into August reveals an average high-temperature of a still moderately hot 81.1°F (27.3°C), closely mirroring July's climate. The low-temperature averages to an enjoyable 62.8°F (17.1°C) during the nights of August.

Heat index

For August, the heat index is computed to be a tropical 86°F (30°C). Persisting in activity during long-term exposure might induce weariness, with subsequent heat cramps.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an aggregate value of air's warmth and moisture to show the human-felt temperature. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.

Humidity

In Delta, the average relative humidity in August is 79%.

Rainfall

In Delta, during August, the rain falls for 12.3 days and regularly aggregates up to 2.24" (57mm) of precipitation. Throughout the year, there are 137.9 rainfall days, and 27.76" (705mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Delta.

Daylight

The average length of the day in August is 13h and 47min.
On the first day of the month, sunrise is at 6:05 am and sunset at 8:25 pm. On the last day of August, sunrise is at 6:35 am and sunset at 7:43 pm CDT.

Sunshine

In August, the average sunshine in Delta is 9.9h.

UV index

The average daily maximum UV index in August in Delta, Iowa, is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum high daily UV index of 5 during August translates into the following directions:
Exercise prevention - Protecting skin and eyes from harm is required. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Enhance your sun protection with tightly woven, yet airy clothing.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are August temperatures in Delta?

During August, Delta experiences an average high-temperature of 81.1°F (27.3°C) and a low-temperature of 62.8°F (17.1°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is computed to be 86°F (30°C).

What is the average humidity in August in Delta?

In Delta, the average relative humidity in August is 79%.

How many days does it rain in August in Delta?

In Delta, Iowa, during August, the rain falls for 12.3 days and regularly aggregates up to 2.24" (57mm) of precipitation.

When it does not snow in Delta?

In Delta, Iowa, snow does not fall in June through September.

What is the average length of the day in August in Delta?

In Delta, Iowa, the average day length in August is 13h and 47min.

When are sunrise and sunset in August in Delta?

In August, on the first day of the month, sunrise is at 6:05 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 7:43 pm CDT.

How many hours of sunshine does Delta have in August?

The average sunshine duration in August in Delta, Iowa, is 9.9h.

What is the UV index reading in August in Delta?

In Delta, the average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes 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
Delta, IA

Average temperature in August - Delta, IA
  • Average high temperature in August: 81.1°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (28.6°F).

  • Average low temperature in August: 62.8°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).

Average pressure in August
Delta, IA

Average pressure in August - Delta, 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
Delta, IA

Average wind speed in August - Delta, IA
  • Average wind speed in August: 6.9mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).

Average humidity in August
Delta, IA

Average humidity in August - Delta, IA
  • Average humidity in August: 79%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (72%).

Average rainfall in August
Delta, IA

Average rainfall in August - Delta, IA
  • Average rainfall in August: 2.24"

The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is February (0.98").

Average rainfall days in August
Delta, IA

Average rainfall days in August - Delta, IA
  • Average rainfall days in August: 12.3 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (4.9 days).

Average snowfall in August
Delta, IA

Average snowfall in August - Delta, IA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (4.06").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Delta, IA

Average snowfall days in August - Delta, IA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Delta, IA

Average daylight in August / Average sunshine in August - Delta, IA
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

Average sunshine days in August
Delta, IA

Average sunshine days in August - Delta, IA
  • Average sunshine days in August: 15.5 days

The month with the most sunshine days is December (19.1 days).
The month with the least sunshine days is June (10.3 days).

Average UV index in August
Delta, IA

Average UV index in August - Delta, 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
Delta, IA

Average cloud cover in August - Delta, IA
  • Average cloud cover in August: 29

The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 29).

Average visibility in August
Delta, IA

Average visibility in August - Delta, 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).

Delta, Iowa, USA

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