Newton, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newton, a city in Jasper County, Iowa.
Today
81°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then a chance of showers and thunderstorms. Partly sunny. High near 81, with temperatures falling to around 79 in the afternoon. Southwest wind around 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Newton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Slight Chance Showers And Thunderstorms | 8 mph SW | 28% |
| Tonight | 62°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 9 mph N | 59% |
| Sunday | 66°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 9 to 13 mph NNE | 49% |
| Sunday Night | 57°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 13 mph NE | 53% |
| Monday | 62°F | Rain Showers Likely | 13 mph NE | 56% |
| Monday Night | 51°F | Rain Showers Likely | 10 mph NE | 56% |
| Tuesday | 61°F | Slight Chance Rain Showers then Partly Sunny | 9 mph ENE | 18% |
| Tuesday Night | 47°F | Partly Cloudy | 7 mph ENE | 3% |
| Wednesday | 65°F | Sunny | 6 mph ENE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 5 mph E | 4% |
| Thursday | 66°F | Slight Chance Rain Showers | 5 mph E | 17% |
| Thursday Night | 55°F | Mostly Cloudy | 3 mph E | 8% |
| Friday | 68°F | Partly Sunny | 6 mph E | 8% |
| Friday Night | 56°F | Mostly Cloudy | 5 mph ESE | 7% |
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
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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 Sep 19, 2026.