August weather forecast
Williamstown, MO

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Weather in August

August, the last month of the summer in Williamstown, is also a moderately hot month, with an average temperature ranging between max 82.8°F (28.2°C) and min 64°F (17.8°C).

Temperature

August denotes a minimal variation in the average high-temperature to a still warm 82.8°F (28.2°C) from July's 83.3°F (28.5°C). Williamstown observes an average nighttime low-temperature of 64°F (17.8°C) during the month of August.

Heat index

The heat index value for August is computed to be a hot 89.6°F (32°C). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gives a temperature feeling by integrating air temperature and humidity. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.

Humidity

In August, the average relative humidity in Williamstown is 78%.

Rainfall

In August, the rain falls for 12.3 days. Throughout August, 2.4" (61mm) of precipitation is accumulated. Throughout the year, there are 134.4 rainfall days, and 27.44" (697mm) of precipitation is accumulated.

Snowfall

In Williamstown, Missouri, snow does not fall in May through September.

Daylight

In Williamstown, the average length of the day in August is 13h and 43min.
On the first day of the month, sunrise is at 6:05 am and sunset at 8:21 pm. On the last day of August, sunrise is at 6:34 am and sunset at 7:40 pm CDT.

Sunshine

In Williamstown, the average sunshine in August is 10h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Williamstown, Missouri. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index of 6 in August interprets into the following recommendations:
Ward off overexposure. Defence against solar harm is crucial. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete 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.
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Frequently asked questions

How hot is August in Williamstown?

The average high-temperature and low-temperature in Williamstown, Missouri, during August are 82.8°F (28.2°C) and 64°F (17.8°C) respectively. In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, is computed to be 89.6°F (32°C).

What is the average humidity in August in Williamstown?

In Williamstown, the average relative humidity in August is 78%.

How much does it rain in Williamstown in August?

In August, in Williamstown, Missouri, the rain falls for 12.3 days. Throughout August, 2.4" (61mm) of precipitation is accumulated.

When it does not snow in Williamstown?

In Williamstown, Missouri, snow does not fall in May through September.

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

In August, the average day length is 13h and 43min.

What time are sunrise and sunset in August in Williamstown?

On the first day of August in Williamstown, sunrise is at 6:05 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 7:40 pm CDT.

How many hours of sunshine does Williamstown have in August?

The average sunshine duration in August is 10h.

What are the months with the highest UV index in Williamstown?

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

What is the UV index reading in August in Williamstown?

In August, the average daily maximum UV index in Williamstown is 6. A UV Index value of 6 to 7 symbolizes 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
Williamstown, MO

Average temperature in August - Williamstown, MO
  • Average high temperature in August: 82.8°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (31.6°F).

  • Average low temperature in August: 64°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure in August
Williamstown, MO

Average pressure in August - Williamstown, MO
  • 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).

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Average wind speed in August
Williamstown, MO

Average wind speed in August - Williamstown, MO
  • Average wind speed in August: 6.7mph

The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).

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Average humidity in August
Williamstown, MO

Average humidity in August - Williamstown, MO
  • Average humidity in August: 78%

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

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Average rainfall in August
Williamstown, MO

Average rainfall in August - Williamstown, MO
  • Average rainfall in August: 2.4"

The wettest month (with the highest rainfall) is May (3.7").
The driest month (with the least rainfall) is January (1.22").

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Average rainfall days in August
Williamstown, MO

Average rainfall days in August - Williamstown, MO
  • Average rainfall days in August: 12.3 days

The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (4.7 days).

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Average snowfall in August
Williamstown, MO

Average snowfall in August - Williamstown, MO
  • Average snowfall in August: 0"

The month with the highest snowfall is January (3.98").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Williamstown, MO

Average snowfall days in August - Williamstown, MO
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (7.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Williamstown, MO

Average daylight in August / Average sunshine in August - Williamstown, MO
  • 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 24min).

  • Average sunshine in August: 10h and 0min

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

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Average sunshine days in August
Williamstown, MO

Average sunshine days in August - Williamstown, MO
  • Average sunshine days in August: 16.4 days

The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is June (10.9 days).

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Average UV index in August
Williamstown, MO

Average UV index in August - Williamstown, MO
  • 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).

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Average cloud cover in August
Williamstown, MO

Average cloud cover in August - Williamstown, MO
  • Average cloud cover in August: 29

The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in August
Williamstown, MO

Average visibility in August - Williamstown, MO
  • 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).

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Williamstown, Missouri, USA

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