August weather forecast
Castleton, IN

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Weather in August

The last month of the summer, August, is another warm month in Castleton, Indiana, with an average temperature fluctuating between 80.2°F (26.8°C) and 63.1°F (17.3°C).

Temperature

Castleton marks the onset of August with an average high-temperature of a still warm 80.2°F (26.8°C), subtly divergent from July's 81.5°F (27.5°C). In the month of August, Castleton's average low-temperature falls to a comfortable 63.1°F (17.3°C).

Humidity

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

Rainfall

In August, the rain falls for 13.8 days. Throughout August, 1.65" (42mm) of precipitation is accumulated. In Castleton, during the entire year, the rain falls for 141 days and collects up to 20.98" (533mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

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

Sunshine

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

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.
Note: A maximum high UV index of 6 in August translates into the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Updated: Jul 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in August?

The high-temperature during August is 80.2°F (26.8°C) and the low-temperature is 63.1°F (17.3°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, in July is calculated to be 87.8°F (31°C).

What is the average humidity in August in Castleton?

In Castleton, the average relative humidity in August is 80%.

How many days does it rain in August?

In Castleton, 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, snow does not fall in May through September.

How many hours of daylight does Castleton have in August?

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

When are sunrise and sunset in August?

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.

What are the months with the highest UV index?

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

What is the UV index intensity in August?

The average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes 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).

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).

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).

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%).

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").

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).

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").

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).

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).

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).

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).

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).

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).

Castleton, Indiana, USA

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