Merrillville, IN
Climate overview — based on NOAA 1991-2020 normals from CROWN PT 1N, IN US.
Year-round temperatures (°F)
Avg high
Avg low
Best time to visit Merrillville
Full guide →Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | °F | °F | °F | 2.49 in | 10.3 in | 10 |
| February | °F | °F | °F | 2.00 in | 6.3 in | 8 |
| March | °F | °F | °F | 2.29 in | 4.3 in | 10 |
| April | °F | °F | °F | 3.70 in | 0.6 in | 10 |
| May | °F | °F | °F | 4.33 in | — | 12 |
| June | °F | °F | °F | 4.68 in | — | 10 |
| July | °F | °F | °F | 4.17 in | — | 9 |
| August | °F | °F | °F | 5.22 in | — | 9 |
| September | °F | °F | °F | 3.48 in | — | 8 |
| October | °F | °F | °F | 3.54 in | — | 10 |
| November | °F | °F | °F | 2.75 in | 0.4 in | 9 |
| December | °F | °F | °F | 2.23 in | 4.7 in | 9 |
Last spring / first fall frost
All-time recordsHottest, coldest, wettest
Planting calendarWhat to plant, and when