US Geography / US Weather / Indiana Weather / Merrillville |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 32 | 36 | 48 | 60 | 72 | 82 | 85 | 84 | 77 | 66 | 51 | 36 |
| Avg. Low | 15 | 18 | 28 | 38 | 47 | 57 | 62 | 61 | 54 | 44 | 34 | 21 |
| Mean | 24 | 27 | 38 | 50 | 60 | 70 | 74 | 72 | 66 | 55 | 42 | 28 |
| Avg. Precip. | 1.7 in | 1.4 in | 2.5 in | 3.7 in | 3.7 in | 3.9 in | 3.7 in | 3.7 in | 4.1 in | 2.8 in | 3.3 in | 2.6 in |
Degrees in Fahrenheit
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