The official National Weather Service forecast for Newtown — 40.2042°N, 87.1478°W, 7.1 miles from I-74. Forecasts here are written by NWS IND, this county’s forecast office.
| Fountain County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 35 | 39 | 51 | 64 | 74 | 82 | 84 | 83 | 79 | 66 | 52 | 40 | 62 |
| Avg low °F | 18 | 21 | 31 | 40 | 52 | 61 | 63 | 61 | 54 | 43 | 32 | 24 | 42 |
| Precip in | 2.6 | 2.2 | 3.0 | 4.0 | 4.5 | 5.0 | 4.3 | 3.4 | 2.8 | 3.3 | 2.7 | 2.7 | 40.5 |
1996–2025 normals for Fountain County — the climate division Newtown sits in. All-time county record high 102.7°F (2012-07-08); record low -24.0°F (1994-01-19). Source: NOAA / National Weather Service.