August weather forecast
Merrillville, IN

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Weather in August

Although August sees a slight dip in temperatures when compared to July, it is still a truly warm summer month in Merrillville. Very similar to July, the weather remains predominantly warm with ample sunny days. These conditions combined with the ongoing extended daylight hours, provide plenty of opportunities for outdoor activities. As the end of the month approaches, a subtle transition towards autumn is noticeable.

Temperature

The average high-temperature in Merrillville during August registers at a still warm 79.5°F (26.4°C), maintaining a close resemblance to the previous month. In Merrillville, the nighttime temperature averages to an enjoyable 64°F (17.8°C) during August.

Humidity

In Merrillville, the average relative humidity in August is 79%.

Rainfall

In Merrillville, during August, the rain falls for 15.8 days and regularly aggregates up to 2.48" (63mm) of precipitation. In Merrillville, during the entire year, the rain falls for 146.6 days and collects up to 23.31" (592mm) of precipitation.

Snowfall

May through September are months without snowfall in Merrillville.

Daylight

In Merrillville, the average length of the day in August is 13h and 47min.
On the first day of August, sunrise is at 5:44 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 7:23 pm CDT.

Sunshine

With an average of 9.8h of sunshine, August has the most sunshine of the year in Merrillville, Indiana.

UV index

In August, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In August, the maximum UV index of 5 suggests this advice:
Take precautions - Protection against sun damage is advised. Avoiding the Sun during its peak radiation time around midday is a healthy practice. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.

Frequently asked questions

What is the usual temperature for Merrillville in August?

In Merrillville, 79.5°F (26.4°C) is the average high-temperature and 64°F (17.8°C) is the average low-temperature during August. The average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in July is calculated to be 87.8°F (31°C).

What is the average humidity in August in Merrillville?

In August, the average relative humidity in Merrillville, Indiana, is 79%.

How many days does it rain in August in Merrillville?

In Merrillville, during August, the rain falls for 15.8 days and regularly aggregates up to 2.48" (63mm) of precipitation.

When it does not snow in Merrillville?

In Merrillville, Indiana, snow does not fall in May through September.

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

In Merrillville, the average day length in August is 13h and 47min.

When are sunrise and sunset in August in Merrillville?

In August, on the first day of the month, sunrise is at 5:44 am and sunset at 8:06 pm. On the last day of the month, in Merrillville, Indiana, sunrise is at 6:15 am and sunset at 7:23 pm CDT.

What month has the most sunshine in Merrillville?

The month with the most sunshine in Merrillville is August, with an average of 9.8h of sunshine.

How many hours of sunshine does Merrillville have in August?

The average sunshine duration in August in Merrillville is 9.8h.

What is the UV index reading in August in Merrillville?

In August, the average daily maximum UV index in Merrillville is 5. A UV Index reading of 3 to 5 represents a moderate health threat from 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
Merrillville, IN

Average temperature in August - Merrillville, IN
  • Average high temperature in August: 79.5°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 (30°F).

  • Average low temperature in August: 64°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 (18.9°F).

Average pressure in August
Merrillville, IN

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

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in August
Merrillville, IN

Average wind speed in August - Merrillville, IN
  • Average wind speed in August: 6.3mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

Average humidity in August
Merrillville, IN

Average humidity in August - Merrillville, IN
  • Average humidity in August: 79%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).

Average rainfall in August
Merrillville, IN

Average rainfall in August - Merrillville, IN
  • Average rainfall in August: 2.48"

The wettest month (with the highest rainfall) is June (3.15").
The driest month (with the least rainfall) is November (1.06").

Average rainfall days in August
Merrillville, IN

Average rainfall days in August - Merrillville, IN
  • Average rainfall days in August: 15.8 days

The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (5.3 days).

Average snowfall in August
Merrillville, IN

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

The month with the highest snowfall is February (3.5").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Merrillville, IN

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

The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Merrillville, IN
  • 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 12min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

Average sunshine days in August
Merrillville, IN

Average sunshine days in August - Merrillville, IN
  • Average sunshine days in August: 11.8 days

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (10.2 days).

Average UV index in August
Merrillville, IN

Average UV index in August - Merrillville, IN
  • Average UV index in August: 5

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

Average cloud cover in August
Merrillville, IN

Average cloud cover in August - Merrillville, IN
  • Average cloud cover in August: 32

The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility in August
Merrillville, IN

Average visibility in August - Merrillville, IN
  • Average visibility in August: 6mi

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

Merrillville, Indiana, USA

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