August weather forecast and climate
Riley, KS

The last month of the summer, August, is also a hot month in Riley, Kansas, with average temperature varying between 87.4°F (30.8°C) and 66.9°F (19.4°C).

Temperature

In August, the average high-temperature is essentially the same as in July - a still hot 87.4°F (30.8°C). In Riley, the average low-temperature is 66.9°F (19.4°C).

Heat index

In August, the average heat index is evaluated at a very hot 98.2°F (36.8°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, metabolic differences, pregnancy). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Riley, the average relative humidity is 69%.

Rainfall

In Riley, Kansas, during 12.8 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. In Riley, Kansas, during the entire year, the rain falls for 114.8 days and collects up to 21.1" (536mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in Riley is 13.7h.

Sunshine

In August, the average sunshine in Riley, Kansas, is 10.6h.

UV index

The average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in August in Riley?

The average high-temperature, in August, in Riley, is 87.4°F (30.8°C), while the average low-temperature is 66.9°F (19.4°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), that combines relative humidity and air temperature, is evaluated at 98.2°F (36.8°C).

What is the average humidity in August in Riley?

In Riley, Kansas, the average relative humidity in August is 69%.

How much does it rain in Riley in August?

In Riley, in August, during 12.8 rainfall days, 2.68" (68mm) of precipitation is typically accumulated.

When it does not snow in Riley?

May through September are months without snowfall in Riley.

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

In Riley, Kansas, the average length of the day in August is 13.7h.

How many hours of sunshine does Riley have in August?

The average sunshine in August in Riley, Kansas, is 10.6h.

What is the UV index intensity in August in Riley?

In August, the average daily maximum UV index in Riley, Kansas, is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unprotected exposure to the UV radiation.
Average temperature in August - Riley, KS
  • Average high temperature in August: 87.4°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in August: 66.9°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (23°F).

Average pressure in August - Riley, KS
  • Average pressure in August: 29.93"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.85").

Average wind speed in August - Riley, KS
  • Average wind speed in August: 8.6mph

The windiest month (with the highest average wind speed) is April (11.8mph).
The calmest month (with the lowest average wind speed) is August (8.6mph).

Average humidity in August - Riley, KS
  • Average humidity in August: 69%

The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is October (64%).

Average rainfall in August - Riley, KS
  • Average rainfall in August: 2.68"

The wettest month (with the highest rainfall) is May (3.98").
The driest month (with the least rainfall) is January (0.63").

Average rainfall days in August - Riley, KS
  • Average rainfall days in August: 12.8 days

The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (3.7 days).

Average snowfall in August - Riley, KS
  • Average snowfall in August: 0"

The month with the highest snowfall is February (2.24").
Months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August - Riley, KS
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (4.8 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in August / Average sunshine in August - Riley, KS
  • Average daylight in August: 13.7h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in August: 10.6h

Months with the most sunshine are June and July (Average sunshine: 10.9h).
The month with the least sunshine is December (Average sunshine: 5.7h).

Average sunshine days in August - Riley, KS
  • Average sunshine days in August: 15.8 days

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

Average UV index in August - Riley, KS
  • Average UV index in August: 6

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in August - Riley, KS
  • Average cloud cover in August: 23

The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 22).

Average visibility in August - Riley, KS
  • Average visibility in August: 6mi

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