August weather forecast
Saint Peter, IL

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Weather in August

The last month of the summer, August, is also a moderately hot month in Saint Peter, Illinois, with an average temperature varying between 65.1°F (18.4°C) and 82.4°F (28°C).

Temperature

August brings an average high-temperature of a still warm 82.4°F (28°C), nearly identical to the preceding month. Throughout August, Saint Peter encounters an average temperature drop to a refreshing 65.1°F (18.4°C).

Heat index

August's mean heat index is computed to be a hot 89.6°F (32°C). Persisting in activity during long-term exposure might induce weariness, with subsequent heat cramps.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', gives an indication of how one might feel in terms of heat after considering humidity. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.

Humidity

July and August, with an average relative humidity of 81%, are the most humid months in Saint Peter.

Rainfall

In Saint Peter, during August, the rain falls for 12.8 days and regularly aggregates up to 2.13" (54mm) of precipitation. Throughout the year, in Saint Peter, there are 139.3 rainfall days, and 23.94" (608mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Saint Peter.

Daylight

In August, the average length of the day is 13h and 38min.
On the first day of August, sunrise is at 5:57 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:26 pm CDT.

Sunshine

In Saint Peter, the average sunshine in August is 9.9h.

UV index

The months with the highest UV index in Saint Peter are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 6 during August translates into these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot in Saint Peter during August?

Saint Peter in August has an average high-temperature of 82.4°F (28°C) and an average low-temperature of 65.1°F (18.4°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 89.6°F (32°C).

What is the most humid month in Saint Peter?

July and August, with an average relative humidity of 81%, are most humid months in Saint Peter.

What is the average humidity in August in Saint Peter?

The average relative humidity in August in Saint Peter is 81%.

How many days does it rain in August in Saint Peter?

In Saint Peter, Illinois, in August, it is raining for 12.8 days, with typically 2.13" (54mm) of accumulated precipitation.

When it does not snow in Saint Peter?

In Saint Peter, snow does not fall in May through October.

What is the average length of the day in August in Saint Peter?

In Saint Peter, the average day length in August is 13h and 38min.

When are sunrise and sunset in August in Saint Peter?

On the first day of August in Saint Peter, Illinois, sunrise is at 5:57 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:26 pm CDT.

How long on average sun shines in August in Saint Peter?

In August, the average sunshine duration is 9.9h.

When is the highest UV index in Saint Peter?

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

What is the UV index intensity in August in Saint Peter?

In August, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health threat from unsafe 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
Saint Peter, IL

Average temperature in August - Saint Peter, IL
  • Average high temperature in August: 82.4°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in August: 65.1°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure in August
Saint Peter, IL

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

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in August
Saint Peter, IL

Average wind speed in August - Saint Peter, 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).

Average humidity in August
Saint Peter, IL

Average humidity in August - Saint Peter, IL
  • Average humidity in August: 81%

The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Saint Peter, IL

Average rainfall in August - Saint Peter, IL
  • Average rainfall in August: 2.13"

The wettest months (with the highest rainfall) are April and June (2.95").
The driest month (with the least rainfall) is February (1.18").

Average rainfall days in August
Saint Peter, IL

Average rainfall days in August - Saint Peter, IL
  • Average rainfall days in August: 12.8 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in August
Saint Peter, IL

Average snowfall in August - Saint Peter, IL
  • Average snowfall in August: 0"

The month with the highest snowfall is December (1.65").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in August
Saint Peter, IL

Average snowfall days in August - Saint Peter, IL
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (5.7 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
Saint Peter, IL

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

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

Average sunshine days in August
Saint Peter, IL

Average sunshine days in August - Saint Peter, IL
  • Average sunshine days in August: 14.4 days

The months with the most sunshine days are January and November (19.5 days).
The months with the least sunshine days are May and July (12.3 days).

Average UV index in August
Saint Peter, IL

Average UV index in August - Saint Peter, 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
Saint Peter, IL

Average cloud cover in August - Saint Peter, 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 and July (Cloud cover 29).

Average visibility in August
Saint Peter, IL

Average visibility in August - Saint Peter, 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).

Saint Peter, Illinois, USA

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