August weather forecast
La Harpe, IL

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Weather in August

The last month of the summer, August, is another warm month in La Harpe, Illinois, with an average temperature ranging between min 63.7°F (17.6°C) and max 82.2°F (27.9°C).

Temperature

August's arrival brings an average high-temperature of a still warm 82.2°F (27.9°C), demonstrating subtle variation from the preceding month. La Harpe's average low-temperature in August is measured at a comfortable 63.7°F (17.6°C).

Heat index

The heat index in August is appraised at a hot 89.6°F (32°C). Constant activity during exposure could result in a state of weariness and possibly heat cramps.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.

Humidity

The average relative humidity in August in La Harpe is 79%.

Rainfall

In August, the rain falls for 11.7 days. Throughout August, 1.69" (43mm) of precipitation is accumulated. Throughout the year, there are 127.6 rainfall days, and 21.02" (534mm) of precipitation is accumulated.

Snowfall

In La Harpe, snow does not fall in May through September.

Daylight

In La Harpe, the average length of the day in August is 13h and 44min.
On the first day of the month, sunrise is at 6:01 am and sunset at 8:18 pm. On the last day of August, sunrise is at 6:30 am and sunset at 7:37 pm CDT.

Sunshine

The average sunshine in August in La Harpe 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 value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: In August, an average UV index of 6 transforms into the following instructions:
Deter overexposure. Protecting against the sun's effects is essential. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Experience reduced UV exposure by about half when donning a wide-brim hat.
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in August?

In August, the average high-temperature and low-temperature are 82.2°F (27.9°C) and 63.7°F (17.6°C) respectively. In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), 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 August, the average relative humidity is 79%.

How many days does it rain in August?

In La Harpe, in August, during 11.7 rainfall days, 1.69" (43mm) of precipitation is typically accumulated.

When it does not snow?

May through September are months without snowfall.

What is the average length of the day in August?

In La Harpe, the average day length in August is 13h and 44min.

What time are sunrise and sunset in August?

On the first day of August, sunrise is at 6:01 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 7:37 pm CDT.

How long on average sun shines in August?

In La Harpe, the average sunshine duration in August is 9.9h.

What are the months with the highest UV index?

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

How high is the UV index in August in La Harpe?

The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health 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
La Harpe, IL

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

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (30.9°F).

  • Average low temperature in August: 63.7°F

The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).

Average pressure in August
La Harpe, IL

Average pressure in August - La Harpe, 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 (29.9"Hg).

Average wind speed in August
La Harpe, IL

Average wind speed in August - La Harpe, IL
  • Average wind speed in August: 6.7mph

The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).

Average humidity in August
La Harpe, IL

Average humidity in August - La Harpe, IL
  • Average humidity in August: 79%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
La Harpe, IL

Average rainfall in August - La Harpe, IL
  • Average rainfall in August: 1.69"

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is January (0.83").

Average rainfall days in August
La Harpe, IL

Average rainfall days in August - La Harpe, IL
  • Average rainfall days in August: 11.7 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (4.3 days).

Average snowfall in August
La Harpe, IL

Average snowfall in August - La Harpe, IL
  • Average snowfall in August: 0"

The month with the highest snowfall is January (3.15").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
La Harpe, IL

Average snowfall days in August - La Harpe, 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).

Average daylight in August /
Average sunshine in August
La Harpe, IL

Average daylight in August / Average sunshine in August - La Harpe, 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 18min).

  • Average sunshine in August: 9h and 5min

The months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

Average sunshine days in August
La Harpe, IL

Average sunshine days in August - La Harpe, IL
  • Average sunshine days in August: 17.2 days

The month with the most sunshine days is December (20 days).
The months with the least sunshine days are May and June (11.8 days).

Average UV index in August
La Harpe, IL

Average UV index in August - La Harpe, 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).

Average cloud cover in August
La Harpe, IL

Average cloud cover in August - La Harpe, IL
  • Average cloud cover in August: 30

The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 30).

Average visibility in August
La Harpe, IL

Average visibility in August - La Harpe, IL
  • Average visibility in August: 6mi

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

La Harpe, Illinois, USA

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