August weather forecast
Castleton, IN

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Weather in August

August, the last month of the summer in Castleton, is also a moderately hot month, with an average temperature varying between 80.2°F (26.8°C) and 63.1°F (17.3°C).

Temperature

Castleton records a slight change with August's average high-temperatures adjusting to a still warm 80.2°F (26.8°C) from July's 81.5°F (27.5°C). Castleton observes an average nighttime low-temperature of 63.1°F (17.3°C) during the month of August.

Humidity

The average relative humidity in August in Castleton is 80%.

Rainfall

In Castleton, in August, it is raining for 13.8 days, with typically 1.65" (42mm) of accumulated precipitation. Throughout the year, in Castleton, there are 141 rainfall days, and 20.98" (533mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall in Castleton.

Daylight

In Castleton, the average length of the day in August is 13h and 42min.
On the first day of August, sunrise is at 6:43 am and sunset at 8:57 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 8:16 pm EDT.

Sunshine

In August, the average sunshine is 9.5h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Castleton. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 6 during August translates into the following guidance:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. 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. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
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Frequently asked questions

What are August temperatures in Castleton?

The average high-temperature and low-temperature in Castleton during August are 80.2°F (26.8°C) and 63.1°F (17.3°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in July is estimated at 87.8°F (31°C).

What is the average humidity in August in Castleton?

The average relative humidity in August in Castleton, Indiana, is 80%.

How much does it rain in Castleton in August?

In Castleton, Indiana, during August, the rain falls for 13.8 days and regularly aggregates up to 1.65" (42mm) of precipitation.

When it does not snow in Castleton?

May through September are months without snowfall in Castleton, Indiana.

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

In Castleton, Indiana, the average day length in August is 13h and 42min.

When is the sunrise / sunset in August in Castleton?

In August, on the first day of the month, sunrise is at 6:43 am and sunset at 8:57 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 8:16 pm EDT.

How many hours of sunshine does Castleton have in August?

In Castleton, the average sunshine duration in August is 9.5h.

When is the highest UV index in Castleton?

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

How high is the UV index in August in Castleton?

The average daily maximum UV index in August in Castleton is 6. A UV Index reading of 6 to 7 represents a high health risk 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
Castleton, IN

Average temperature in August - Castleton, IN
  • Average high temperature in August: 80.2°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in August: 63.1°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

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Average pressure in August
Castleton, IN

Average pressure in August - Castleton, IN
  • Average pressure in August: 29.98"Hg

The months with the highest atmospheric pressure are January and November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in August
Castleton, IN

Average wind speed in August - Castleton, IN
  • Average wind speed in August: 5.9mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).

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Average humidity in August
Castleton, IN

Average humidity in August - Castleton, IN
  • Average humidity in August: 80%

The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).

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Average rainfall in August
Castleton, IN

Average rainfall in August - Castleton, IN
  • Average rainfall in August: 1.65"

The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is February (1.18").

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Average rainfall days in August
Castleton, IN

Average rainfall days in August - Castleton, IN
  • Average rainfall days in August: 13.8 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (6 days).

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Average snowfall in August
Castleton, IN

Average snowfall in August - Castleton, IN
  • Average snowfall in August: 0"

The month with the highest snowfall is February (2.01").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Castleton, IN

Average snowfall days in August - Castleton, IN
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Castleton, IN

Average daylight in August / Average sunshine in August - Castleton, IN
  • 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: 9h and 3min

The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in August
Castleton, IN

Average sunshine days in August - Castleton, IN
  • Average sunshine days in August: 14.3 days

The months with the most sunshine days are October and November (18.7 days).
The month with the least sunshine days is May (11.3 days).

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Average UV index in August
Castleton, IN

Average UV index in August - Castleton, IN
  • Average UV index in August: 6

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

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Average cloud cover in August
Castleton, IN

Average cloud cover in August - Castleton, IN
  • Average cloud cover in August: 31

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in August
Castleton, IN

Average visibility in August - Castleton, IN
  • 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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Castleton, Indiana, USA

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