August weather forecast
Palmyra, IL

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Weather in August

The last month of the summer, August, is also a moderately hot month in Palmyra, Illinois, with temperature in the range of an average high of 82.2°F (27.9°C) and an average low of 64.9°F (18.3°C).

Temperature

The advent of August sees the average high-temperature at a still warm 82.2°F (27.9°C), subtly shifted from July's 83.3°F (28.5°C). Palmyra experiences a nighttime temperature average of 64.9°F (18.3°C) during August.

Heat index

Throughout August, the heat index is appraised at a tropical 89.6°F (32°C). With sustained exposure and activity, exhaustion becomes probable, resulting in heat cramps.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a composite of temperature and humidity figures to convey how warm it feels. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.

Humidity

In Palmyra, the average relative humidity in August is 81%.

Rainfall

In Palmyra, in August, it is raining for 13.8 days, with typically 2.72" (69mm) of accumulated precipitation. In Palmyra, during the entire year, the rain falls for 151.5 days and collects up to 31.3" (795mm) of precipitation.

Snowfall

In Palmyra, snow does not fall in May through October.

Daylight

The average length of the day in August in Palmyra is 13h and 40min.
On the first day of the month, sunrise is at 6:00 am and sunset at 8:12 pm. On the last day of August, in Palmyra, sunrise is at 6:28 am and sunset at 7:31 pm CDT.

Sunshine

The average sunshine in August is 9.9h.

UV index

The months with the highest UV index in Palmyra are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index, 6 in August, converts into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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Frequently asked questions

What is the average August temperature in Palmyra?

In August, the average high-temperature and low-temperature in Palmyra are 82.2°F (27.9°C) and 64.9°F (18.3°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is appraised at 89.6°F (32°C).

What is the average humidity in August in Palmyra?

In Palmyra, Illinois, the average relative humidity in August is 81%.

How many days does it rain in August in Palmyra?

In Palmyra, Illinois, during August, the rain falls for 13.8 days and regularly aggregates up to 2.72" (69mm) of precipitation.

When it does not snow in Palmyra?

May through October are months without snowfall in Palmyra, Illinois.

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

In Palmyra, the average day length in August is 13h and 40min.

When are sunrise and sunset in August in Palmyra?

On the first day of August, sunrise is at 6:00 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 7:31 pm CDT.

How long on average sun shines in August in Palmyra?

In August, the average sunshine duration in Palmyra, Illinois, is 9.9h.

When is the highest UV index in Palmyra?

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

What is the UV index reading in August in Palmyra?

In August, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health threat from exposure to the Sun's 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
Palmyra, IL

Average temperature in August - Palmyra, IL
  • Average high temperature in August: 82.2°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (34.2°F).

  • Average low temperature in August: 64.9°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).

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Average pressure in August
Palmyra, IL

Average pressure in August - Palmyra, IL
  • 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 (29.92"Hg).

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Average wind speed in August
Palmyra, IL

Average wind speed in August - Palmyra, IL
  • Average wind speed in August: 6mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in August
Palmyra, IL

Average humidity in August - Palmyra, IL
  • Average humidity in August: 81%

The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in August
Palmyra, IL

Average rainfall in August - Palmyra, IL
  • Average rainfall in August: 2.72"

The wettest month (with the highest rainfall) is June (3.86").
The driest month (with the least rainfall) is December (1.73").

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Average rainfall days in August
Palmyra, IL

Average rainfall days in August - Palmyra, IL
  • Average rainfall days in August: 13.8 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (7.4 days).

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Average snowfall in August
Palmyra, IL

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

The month with the highest snowfall is February (3.19").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Palmyra, IL

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

The month with the highest number of snowfall days is January (8.5 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
Palmyra, IL

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

The month with the longest days is June (Average daylight: 14h and 54min).
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 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days in August
Palmyra, IL

Average sunshine days in August - Palmyra, IL
  • Average sunshine days in August: 14.9 days

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (10.6 days).

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Average UV index in August
Palmyra, IL

Average UV index in August - Palmyra, 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
Palmyra, IL

Average cloud cover in August - Palmyra, IL
  • Average cloud cover in August: 30

The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June, July, August and September (Cloud cover 30).

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Average visibility in August
Palmyra, IL

Average visibility in August - Palmyra, 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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Palmyra, Illinois, USA

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