August weather forecast
O'Neill, IA

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Weather in August

August, the last month of the summer in O'Neill, is another warm month, with an average temperature fluctuating between 78.4°F (25.8°C) and 60.1°F (15.6°C).

Temperature

O'Neill's August reports an average high-temperature of a still warm 78.4°F (25.8°C), exhibiting a minor difference from July. August brings an average low-temperature of 60.1°F (15.6°C) to O'Neill.

Humidity

In O'Neill, the average relative humidity in August is 81%.

Rainfall

In August, in O'Neill, the rain falls for 13.9 days. Throughout August, 1.97" (50mm) of precipitation is accumulated. Throughout the year, there are 139.6 rainfall days, and 24.92" (633mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

In O'Neill, the average length of the day in August is 13h and 52min.
On the first day of the month, sunrise is at 5:56 am and sunset at 8:23 pm. On the last day of August, in O'Neill, sunrise is at 6:28 am and sunset at 7:39 pm CDT.

Sunshine

The average sunshine in August is 9.8h.

UV index

The months with the highest UV index in O'Neill are May through August, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index, 5 during August, leads to the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Direct Sun exposure should be minimized especially during midday when radiation is most intense. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
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Frequently asked questions

What is the average August temperature in O'Neill?

In O'Neill, 78.4°F (25.8°C) is the average high-temperature and 60.1°F (15.6°C) is the average low-temperature during August.

What is the average humidity in August in O'Neill?

In O'Neill, Iowa, the average relative humidity in August is 81%.

How much does it rain in O'Neill in August?

In O'Neill, in August, it is raining for 13.9 days, with typically 1.97" (50mm) of accumulated precipitation.

When it does not snow in O'Neill?

May through September are months without snowfall.

What is the average length of the day in August in O'Neill?

In August, the average day length is 13h and 52min.

What time are sunrise and sunset in August in O'Neill?

On the first day of August in O'Neill, sunrise is at 5:56 am and sunset at 8:23 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 7:39 pm CDT.

How many hours of sunshine does O'Neill have in August?

In O'Neill, Iowa, the average sunshine duration in August is 9.8h.

When is the highest UV index in O'Neill?

May through August, with an average maximum UV index of 5, are months with the highest UV index.

What is the UV index reading in August in O'Neill?

The average daily maximum UV index in August in O'Neill, Iowa, is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
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
O'Neill, IA

Average temperature in August - O
  • Average high temperature in August: 78.4°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (24.3°F).

  • Average low temperature in August: 60.1°F

The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).

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Average pressure in August
O'Neill, IA

Average pressure in August - O
  • Average pressure in August: 29.97"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
O'Neill, IA

Average wind speed in August - O
  • Average wind speed in August: 6.8mph

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

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Average humidity in August
O'Neill, IA

Average humidity in August - O
  • Average humidity in August: 81%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (75%).

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Average rainfall in August
O'Neill, IA

Average rainfall in August - O
  • Average rainfall in August: 1.97"

The wettest months (with the highest rainfall) are May and June (3.54").
The driest month (with the least rainfall) is December (0.98").

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Average rainfall days in August
O'Neill, IA

Average rainfall days in August - O
  • Average rainfall days in August: 13.9 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (4.1 days).

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Average snowfall in August
O'Neill, IA

Average snowfall in August - O
  • Average snowfall in August: 0"

The month with the highest snowfall is January (4.29").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
O'Neill, IA

Average snowfall days in August - O
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (13.7 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
O'Neill, IA

Average daylight in August / Average sunshine in August - O
  • 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 6min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

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Average sunshine days in August
O'Neill, IA

Average sunshine days in August - O
  • Average sunshine days in August: 15.1 days

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is May (9.4 days).

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Average UV index in August
O'Neill, IA

Average UV index in August - O
  • Average UV index in August: 5

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).

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Average cloud cover in August
O'Neill, IA

Average cloud cover in August - O
  • Average cloud cover in August: 32

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in August
O'Neill, IA

Average visibility in August - O
  • Average visibility in August: 6mi

The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).

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O'Neill, Iowa, USA

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