Merrillville, IN Weather & Climate Normals
Merrillville's real weather, in one number
Merrillville, IN scores 44/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Merrillville's hottest and coldest months
Merrillville's hottest month is Jul, averaging 73°F; its coldest is Jan, averaging 25°F, a 48.1°F swing across the year, one of the widest gaps in this dataset.
Merrillville's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 32°F | 18°F | 2.38in | 14.6in |
| Feb | 36°F | 21°F | 2.24in | 5.5in |
| Mar | 48°F | 29°F | 2.63in | 6.7in |
| Apr | 61°F | 39°F | 3.74in | 1.2in |
| May | 71°F | 49°F | 4.59in | 0in |
| Jun | 80°F | 59°F | 4.33in | 0in |
| Jul | 83°F | 63°F | 4.1in | 0in |
| Aug | 81°F | 62°F | 3.57in | 0in |
| Sep | 75°F | 54°F | 2.92in | 0in |
| Oct | 64°F | 44°F | 3.93in | 0.3in |
| Nov | 49°F | 34°F | 3.26in | 2.3in |
| Dec | 37°F | 24°F | 2.58in | 9.4in |
May, Jun, Jul, Aug, and Sep are the best time to see Merrillville at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in Merrillville
Merrillville averages 40.27in of precipitation a year across roughly 127 days with measurable rain or snow, and 40in of snow a year.
Where Merrillville ranks
Merrillville ranks 3711 of 4876 US cities in this dataset for comfort score, and 108 of 126 within IN. About 36,989 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Valparaiso Wtr Wks, IN US, 14.7 miles from Merrillville, not a prediction for any specific day.
More on how this is worked out
How the comfort score is calculated · Why some cities show no snow or rain figure