Average annual temperature is 20.5 °C
Absolute maximum temperature: 39.0 °C
Absolute minimum temperature: -0.8 °C
Number of sunny days: 175 days
Number of rainy days: 190 days
Look at detailed online map of Merrillville
* Weather data for Merrillville United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 25.1 | 28.7 | 30.0 | 31.0 | 34.6 | 35.9 | 37.4 | 39.0 | 32.1 | 29.6 | 28.0 | 24.8 |
| Average daytime temperature (°C) | 19.3 | 22.7 | 24.3 | 27.1 | 28.8 | 31.4 | 34.2 | 36.0 | 30.0 | 25.7 | 20.5 | 16.8 |
| Average temperature (°C) | 13.4 | 16.4 | 17.8 | 20.5 | 22.8 | 25.5 | 28.3 | 29.6 | 24.6 | 20.0 | 15.1 | 11.9 |
| Average night temperature (°C) | 8.8 | 11.9 | 12.7 | 15.0 | 17.7 | 21.0 | 23.8 | 24.6 | 20.3 | 15.0 | 10.9 | 8.1 |
| Absolute minimum temperature (°C) | -0.8 | 1.2 | 0.6 | 9.3 | 10.7 | 18.1 | 21.4 | 22.5 | 16.1 | 8.7 | 0.8 | 0.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.4 | 11.1 | 12.0 | 12.9 | 13.7 | 14.1 | 13.9 | 13.2 | 12.4 | 11.4 | 10.6 | 10.2 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 7.2 | 8.0 | 8.8 | 9.3 | 10.0 | 10.2 | 11.2 | 11.1 | 9.5 | 9.0 | 6.9 | 6.4 |
| Precipitation (mm) | 122 | 95 | 136 | 121 | 72 | 134 | 93 | 155 | 90 | 28 | 64 | 219 |
| Sunny days | 17 | 15 | 17 | 12 | 14 | 6 | 4 | 7 | 14 | 26 | 21 | 22 |
| Rainy days | 14 | 13 | 14 | 18 | 17 | 24 | 27 | 24 | 16 | 5 | 9 | 9 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Merrillville is at