August weather forecast
Williamstown, OH

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Weather in August

The last month of the summer, August, is also a moderately hot month in Williamstown, Ohio, with an average temperature fluctuating between 78.6°F (25.9°C) and 60.8°F (16°C).

Temperature

August welcomes an average high-temperature of a still warm 78.6°F (25.9°C), not much different from the preceding month. The average temperature during August nights is registered at an enjoyable 60.8°F (16°C).

Humidity

In August, the average relative humidity is 83%.

Rainfall

In Williamstown, in August, it is raining for 16.8 days, with typically 2.56" (65mm) of accumulated precipitation. Throughout the year, there are 168.7 rainfall days, and 29.72" (755mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Williamstown, Ohio.

Daylight

In August, the average length of the day is 13h and 45min.
On the first day of August, sunrise is at 6:31 am and sunset at 8:50 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 8:08 pm EDT.

Sunshine

In August, the average sunshine in Williamstown is 9.8h.

UV index

The average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily high UV index of 5 in August translates into this advice:
Ensure safety - Sun damage prevention is strongly urged. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.

Frequently asked questions

What is the usual temperature for Williamstown in August?

The high-temperature during August is 78.6°F (25.9°C) and the low-temperature is 60.8°F (16°C).

What is the average humidity in August?

The average relative humidity in August is 83%.

How many days does it rain in August?

In Williamstown, in August, during 16.8 rainfall days, 2.56" (65mm) of precipitation is typically accumulated.

When it does not snow?

In Williamstown, snow does not fall in June through September.

What is the average length of the day in August?

In August, the average day length in Williamstown is 13h and 45min.

What time are sunrise and sunset in August?

On the first day of August, sunrise is at 6:31 am and sunset at 8:50 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 8:08 pm EDT.

How long on average sun shines in August?

The average sunshine duration in August is 9.8h.

What is the UV index reading in August?

In Williamstown, the average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a medium health risk 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, OH

Average temperature in August - Williamstown, OH
  • Average high temperature in August: 78.6°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (31.1°F).

  • Average low temperature in August: 60.8°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

Average pressure in August
Williamstown, OH

Average pressure in August - Williamstown, OH
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in August
Williamstown, OH

Average wind speed in August - Williamstown, OH
  • Average wind speed in August: 6mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity in August
Williamstown, OH

Average humidity in August - Williamstown, OH
  • Average humidity in August: 83%

The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are October and November (75%).

Average rainfall in August
Williamstown, OH

Average rainfall in August - Williamstown, OH
  • Average rainfall in August: 2.56"

The wettest month (with the highest rainfall) is June (3.54").
The driest month (with the least rainfall) is December (1.81").

Average rainfall days in August
Williamstown, OH

Average rainfall days in August - Williamstown, OH
  • Average rainfall days in August: 16.8 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (8.4 days).

Average snowfall in August
Williamstown, OH

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

The month with the highest snowfall is February (3.74").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Williamstown, OH

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

The month with the highest number of snowfall days is January (13.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Williamstown, OH
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).

Average sunshine days in August
Williamstown, OH

Average sunshine days in August - Williamstown, OH
  • Average sunshine days in August: 10.9 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is June (9.3 days).

Average UV index in August
Williamstown, OH

Average UV index in August - Williamstown, OH
  • Average UV index in August: 5

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in August
Williamstown, OH

Average cloud cover in August - Williamstown, OH
  • Average cloud cover in August: 33

The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in August
Williamstown, OH

Average visibility in August - Williamstown, OH
  • Average visibility in August: 5mi

The months with the highest visibility are March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are January, February, August and September (5mi).

Williamstown, Ohio, USA

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