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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

WhenTempForecastWindPrecip
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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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.