The official National Weather Service forecast for La Porte — 41.6077°N, 86.7139°W, 4.1 miles from I-90. Forecasts here are written by NWS IWX, this county’s forecast office.
| LaPorte County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 32 | 36 | 48 | 60 | 71 | 80 | 83 | 81 | 76 | 63 | 49 | 37 | 60 |
| Avg low °F | 17 | 20 | 28 | 37 | 49 | 59 | 62 | 61 | 54 | 43 | 32 | 23 | 40 |
| Precip in | 2.4 | 2.2 | 2.6 | 3.5 | 4.3 | 4.3 | 4.2 | 4.2 | 3.0 | 3.7 | 2.5 | 2.5 | 39.4 |
1996–2025 normals for LaPorte County — the climate division La Porte sits in. All-time county record high 100.7°F (2012-07-07); record low -21.1°F (1994-01-19). Source: NOAA / National Weather Service.