August weather forecast
Seymour, IL

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Weather in August

The last month of the summer, August, is another warm month in Seymour, Illinois, with temperature in the range of an average high of 80.2°F (26.8°C) and an average low of 63.1°F (17.3°C).

Temperature

Seymour's average high-temperature in August is a still warm 80.2°F (26.8°C), indicating a subtle variation from July. In Seymour, an average temperature of 63.1°F (17.3°C) is noted during August nights.

Humidity

In Seymour, the average relative humidity in August is 83%.

Rainfall

In Seymour, during August, the rain falls for 14.1 days and regularly aggregates up to 2.2" (56mm) of precipitation. Throughout the year, there are 152.9 rainfall days, and 29.72" (755mm) of precipitation is accumulated.

Snowfall

In Seymour, snow does not fall in May through September.

Daylight

In August, the average length of the day is 13h and 43min.
On the first day of August in Seymour, Illinois, sunrise is at 5:52 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 7:26 pm CDT.

Sunshine

In August, the average sunshine is 9.9h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: In August, the maximum UV index of 6 translates into these guidelines:
Guard against overexposure. Protection from sun-induced harm is essential. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
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Frequently asked questions

What are August temperatures in Seymour?

In August, in Seymour, the average high-temperature is 80.2°F (26.8°C), and the average low-temperature is 63.1°F (17.3°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in July is estimated at 87.8°F (31°C).

What is the average humidity in August in Seymour?

The average relative humidity in August in Seymour, Illinois, is 83%.

How many days does it rain in August in Seymour?

In Seymour, in August, it is raining for 14.1 days, with typically 2.2" (56mm) of accumulated precipitation.

When it does not snow in Seymour?

May through September are months without snowfall in Seymour, Illinois.

How many hours of daylight does Seymour have in August?

In August, the average day length in Seymour, Illinois, is 13h and 43min.

When are sunrise and sunset in August in Seymour?

On the first day of August in Seymour, Illinois, sunrise is at 5:52 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 7:26 pm CDT.

How long on average sun shines in August in Seymour?

The average sunshine duration in August in Seymour is 9.9h.

What are the months with the highest UV index in Seymour?

The months with the highest UV index in Seymour are June through August, with an average maximum UV index of 6.

What is the UV index intensity in August in Seymour?

In Seymour, Illinois, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health threat 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
Seymour, IL

Average temperature in August - Seymour, IL
  • Average high temperature in August: 80.2°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in August: 63.1°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).

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Average pressure in August
Seymour, IL

Average pressure in August - Seymour, IL
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in August
Seymour, IL

Average wind speed in August - Seymour, IL
  • Average wind speed in August: 6.4mph

The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

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Average humidity in August
Seymour, IL

Average humidity in August - Seymour, IL
  • Average humidity in August: 83%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in August
Seymour, IL

Average rainfall in August - Seymour, IL
  • Average rainfall in August: 2.2"

The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is December (1.65").

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Average rainfall days in August
Seymour, IL

Average rainfall days in August - Seymour, IL
  • Average rainfall days in August: 14.1 days

The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (6.3 days).

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Average snowfall in August
Seymour, IL

Average snowfall in August - Seymour, IL
  • Average snowfall in August: 0"

The month with the highest snowfall is January (4.25").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Seymour, IL

Average snowfall days in August - Seymour, IL
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (11.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Seymour, IL

Average daylight in August / Average sunshine in August - Seymour, IL
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in August
Seymour, IL

Average sunshine days in August - Seymour, IL
  • Average sunshine days in August: 14.8 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (10.2 days).

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Average UV index in August
Seymour, IL

Average UV index in August - Seymour, IL
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in August
Seymour, IL

Average cloud cover in August - Seymour, IL
  • Average cloud cover in August: 31

The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 31).

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Average visibility in August
Seymour, IL

Average visibility in August - Seymour, IL
  • Average visibility in August: 5mi

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

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Seymour, Illinois, USA

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