Newton, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newton, a city in Jasper County, Iowa.
Today
84°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Partly sunny. High near 84, with temperatures falling to around 81 in the afternoon. West northwest wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Newton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Showers And Thunderstorms Likely | 5 to 8 mph WNW | 63% |
| Tonight | 63°F | Showers And Thunderstorms | 7 to 10 mph NNE | 88% |
| Wednesday | 74°F | Showers And Thunderstorms | 7 mph NNE | 79% |
| Wednesday Night | 57°F | Chance Showers And Thunderstorms | 5 mph NNE | 43% |
| Thursday | 81°F | Sunny | 3 mph ENE | 4% |
| Thursday Night | 61°F | Mostly Clear | 2 mph SE | 2% |
| Friday | 84°F | Sunny | 2 to 6 mph SSE | 6% |
| Friday Night | 66°F | Mostly Clear | 6 mph SSE | 14% |
| Saturday | 88°F | Sunny | 5 to 9 mph S | 11% |
| Saturday Night | 71°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 10 mph S | 15% |
| Sunday | 89°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 12 mph S | 15% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 10 mph S | 32% |
| Monday | 89°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 9 to 13 mph S | 32% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 13 mph ESE | 28% |
Forecast source: National Weather Service (api.weather.gov) for Newton (41.696, -93.041). Updated through the day.
Growing snapshot for Newton
Last spring frost
Apr 22
First fall frost
Oct 17
Growing season
174 days
Hardiness zone
5b
More local growing data for Newton: nearby ZIP 50208 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Baxter
Colfax
Kellogg
Lambs Grove
Lynnville
Mingo
Monroe
Oakland Acres
Prairie City
Reasnor
Sully
Valeria
Climate data from the nearest NOAA station, Newton, Ia (0.5 mi from Newton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.