Merrillville (IN) Climate by Month
The temperature in Merrillville can vary greatly throughout the year.
The temperatures shift from warm
to very cold.
It also has a notably wet climate with much precipitation.
Let's now guide you through the climate details for a complete overview.
Average day and night temperature
Depending on the time of the year, temperatures range from comfortable to very cold in Merrillville. Average daytime temperatures range from a comfortable 29°C in July, the warmest time of the year, to a very cold 0°C during cooler months like January. At night, temperatures typically average around -9°C during these months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Merrillville has a relatively rain/snowy climate with high precipitation levels, averaging 1096 mm of rain/snowfall annually. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, August receives high rainfall, averaging 146 mm of precipitation, recorded across 11 rainy days. In contrast, the drier season, November brings less rainfall, with 55 mm over 9 rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Seasonal changes in sunshine hours are quite dramatic in Merrillville. While July receives considerable daily sunshine with up to 10.6 hours, December marks the darkest time of the year, where sunshine is scarce with only 3.6 hours of sunlight per day.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is low throughout the year in Merrillville.
Relative humidity over the year
The best time of year to visit Merrillville in the United States of America
During the months of May and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The hottest season / summer takes place in June, July, August and September.
July has an average maximum temperature of 29°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 0°C.
August tops the wettest month list with 146 mm of rainfall.
November is the driest month with 55 mm of precipitation.
July is the sunniest month with an average of 319 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
