August weather forecast and climate
Jefferson City, MO

The scenic view of the State Capitol building in Jefferson City, Missouri, surrounded by a beautiful park, reflected in a pool of water nearby
The scenic view of the State Capitol building in Jefferson City, Missouri, surrounded by a beautiful park, reflected in a pool of water nearby
The last month of the summer, August, is another hot month in Jefferson City, Missouri, with average temperature fluctuating between 87.4°F (30.8°C) and 65.8°F (18.8°C).

Temperature

In Jefferson City, Missouri, the average high-temperature is practically the same as in July - a still tropical 87.4°F (30.8°C). In August, the average low-temperature is 65.8°F (18.8°C).

Heat index

The average heat index in August is calculated to a very hot 100.4°F (38°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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 'feels like', 'apparent temperature', 'felt air temperature', or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like activity, differences in body mass, height, and shape, wind, and metabolic differences affect individual temperature impact. 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 particularly important for children. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In August, the average relative humidity is 73%.

Rainfall

In Jefferson City, during August, the rain falls for 8.6 days and regularly aggregates up to 0.87" (22mm) of precipitation. Throughout the year, there are 93.7 rainfall days, and 9.29" (236mm) of precipitation is accumulated.

Snowfall

In Jefferson City snow does not fall in April through October.

Daylight

In Jefferson City, Missouri, the average length of the day in August is 13.6h.

Sunshine

In August, the average sunshine in Jefferson City, Missouri, is 10.3h.

UV index

Months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in August in Jefferson City?

In Jefferson City, Missouri, in August, the average high-temperature is 87.4°F (30.8°C), and the average low-temperature is 65.8°F (18.8°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that combines relative humidity and air temperature, is calculated to 100.4°F (38°C).

What is the average humidity in August in Jefferson City?

The average relative humidity in August in Jefferson City, Missouri, is 73%.

How many days does it rain in August in Jefferson City?

In Jefferson City, Missouri, during August, the rain falls for 8.6 days and regularly aggregates up to 0.87" (22mm) of precipitation.

When it does not snow in Jefferson City?

April through October are months without snowfall in Jefferson City.

How many hours of daylight does Jefferson City have in August?

In Jefferson City, Missouri, the average length of the day in August is 13.6h.

How long on average sun shines in August in Jefferson City?

In Jefferson City, the average sunshine in August is 10.3h.

When is the highest UV index in Jefferson City?

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

What is the UV index reading in August in Jefferson City?

The average daily maximum UV index in August in Jefferson City is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in August - Jefferson City, MO
  • Average high temperature in August: 30.8°C

The warmest month (with the highest average high temperature) is July (31.8°C).
The month with the lowest average high temperature is January (3.6°C).

  • Average low temperature in August: 18.8°C

The month with the highest average low temperature is July (19.9°C).
The coldest month (with the lowest average low temperature) is January (-4.3°C).

Average pressure in August - Jefferson City, MO
  • Average pressure in August: 1015mbar

The month with the highest atmospheric pressure is January (1021.4mbar).
The month with the lowest atmospheric pressure is June (1013.1mbar).

Average wind speed in August - Jefferson City, MO
  • Average wind speed in August: 9.4km/h

The windiest month (with the highest average wind speed) is January (14.2km/h).
The calmest month (with the lowest average wind speed) is July (9.3km/h).

Average humidity in August - Jefferson City, MO
  • Average humidity in August: 73%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is October (72%).

Average rainfall in August - Jefferson City, MO
  • Average rainfall in August: 22mm

The wettest month (with the highest rainfall) is May (33mm).
The driest month (with the least rainfall) is November (12mm).

Average rainfall days in August - Jefferson City, MO
  • Average rainfall days in August: 8.6 days

The month with the highest number of rainy days is May (11.3 days).
The month with the least rainy days is January (4 days).

Average snowfall in August - Jefferson City, MO
  • Average snowfall in August: 0mm

The month with the highest snowfall is January (18mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in August - Jefferson City, MO
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (5.2 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in August / Average sunshine in August - Jefferson City, MO
  • Average daylight in August: 13.6h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in August: 10.3h

The month with the most sunshine is June (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.8h).

Average sunshine days in August - Jefferson City, MO
  • Average sunshine days in August: 19.8 days

The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is May (16.7 days).

Average UV index in August - Jefferson City, MO
  • Average UV index in August: 6

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in August - Jefferson City, MO
  • Average cloud cover in August: 28

The month with the most cloud cover is February (Cloud cover 49).
Months with the least cloud cover are June and August (Cloud cover 28).

Average visibility in August - Jefferson City, MO
  • Average visibility in August: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).