August weather forecast
Saint John, KS

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Weather in August

The last month of the summer, August, is another tropical month in Saint John, Kansas, with an average temperature ranging between max 90.1°F (32.3°C) and min 67.8°F (19.9°C).

Temperature

As August takes hold, the average high-temperature is a still tropical 90.1°F (32.3°C), nearly mirroring that of the previous month. Saint John documents a substantial shift from daytime warmth, recording an average nighttime temperature of 67.8°F (19.9°C) in August.

Heat index

August's mean heat index is estimated at a torrid 98.6°F (37°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

The average relative humidity in August is 59%.

Rainfall

In August, the rain falls for 9.8 days. Throughout August, 1.54" (39mm) of precipitation is accumulated. In Saint John, during the entire year, the rain falls for 100.8 days and collects up to 16.57" (421mm) of precipitation.

Snowfall

In Saint John, snow does not fall in May through September.

Daylight

The average length of the day in August is 13h and 35min.
On the first day of August, sunrise is at 6:38 am and sunset at 8:43 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 8:05 pm CDT.

Sunshine

In Saint John, the average sunshine in August is 10.7h.

UV index

In Saint John, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 6 during August leads to these instructions:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. 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. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Updated: Jul 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in August?

An average high-temperature, in August, in Saint John, is 90.1°F (32.3°C) and the average low-temperature is 67.8°F (19.9°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is estimated at 98.6°F (37°C).

What is the average humidity in August?

The average relative humidity in August is 59%.

How many days does it rain in August?

In Saint John, during August, the rain falls for 9.8 days and regularly aggregates up to 1.54" (39mm) of precipitation.

When it does not snow?

May through September are months without snowfall.

How many hours of daylight does Saint John have in August?

In August, the average day length is 13h and 35min.

When are sunrise and sunset in August?

On the first day of August, sunrise is at 6:38 am and sunset at 8:43 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 8:05 pm CDT.

How long on average sun shines in August?

In August, the average sunshine duration in Saint John is 10.7h.

How high is the UV index in August?

In August, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high hazard to health 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 John, KS

Average temperature in August - Saint John, KS
  • Average high temperature in August: 90.1°F

The warmest month (with the highest average high temperature) is July (92.7°F).
The months with the lowest average high temperature are January and December (43.3°F).

  • Average low temperature in August: 67.8°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

Average pressure in August
Saint John, KS

Average pressure in August - Saint John, KS
  • Average pressure in August: 29.93"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in August
Saint John, KS

Average wind speed in August - Saint John, KS
  • Average wind speed in August: 9.7mph

The windiest month (with the highest average wind speed) is April (13mph).
The calmest month (with the lowest average wind speed) is August (9.7mph).

Average humidity in August
Saint John, KS

Average humidity in August - Saint John, KS
  • Average humidity in August: 59%

The month with the highest relative humidity is December (65%).
The month with the lowest relative humidity is July (56%).

Average rainfall in August
Saint John, KS

Average rainfall in August - Saint John, KS
  • Average rainfall in August: 1.54"

The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is January (0.63").

Average rainfall days in August
Saint John, KS

Average rainfall days in August - Saint John, KS
  • Average rainfall days in August: 9.8 days

The month with the highest number of rainy days is May (14.2 days).
The month with the least rainy days is January (3.7 days).

Average snowfall in August
Saint John, KS

Average snowfall in August - Saint John, KS
  • Average snowfall in August: 0"

The month with the highest snowfall is February (2.87").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Saint John, KS

Average snowfall days in August - Saint John, KS
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (5.6 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 John, KS

Average daylight in August / Average sunshine in August - Saint John, KS
  • 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 36min).

  • Average sunshine in August: 10h and 4min

The month with the most sunshine is June (Average sunshine: 11h and 30min).
The months with the least sunshine are January and December (Average sunshine: 6h and 18min).

Average sunshine days in August
Saint John, KS

Average sunshine days in August - Saint John, KS
  • Average sunshine days in August: 19.7 days

The month with the most sunshine days is December (23.5 days).
The month with the least sunshine days is May (13.8 days).

Average UV index in August
Saint John, KS

Average UV index in August - Saint John, KS
  • Average UV index in August: 6

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, November and December (UV index 2).

Average cloud cover in August
Saint John, KS

Average cloud cover in August - Saint John, KS
  • Average cloud cover in August: 20

The month with the most cloud cover is April (Cloud cover 33).
The month with the least cloud cover is June (Cloud cover 18).

Average visibility in August
Saint John, KS

Average visibility in August - Saint John, KS
  • 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 John, Kansas, USA

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