August weather forecastMerrillville, IN
August
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
Merrillville notes an average high-temperature of a still moderately hot 79.5°F (26.4°C) in August, hardly diverging from July. During the nights in August, Merrillville observes an average low-temperature of 64°F (17.8°C).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. Throughout the year, there are 146.6 rainfall days, and 23.31" (592mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in Merrillville, Indiana.Daylight
In August, the average length of the day is 13h and 47min.On the first day of the month, sunrise is at 5:44 am and sunset at 8:06 pm. On the last day of August, sunrise is at 6:15 am and sunset at 7:23 pm CDT.
Sunshine
The month with the most sunshine is August, with an average of 9.8h of sunshine.UV index
In Merrillville, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 5 in August translates into the following instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 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: 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: 13h and 48min
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 48min
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: 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: 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: 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: 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).
