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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.

Overnight
69°F
Patchy Fog
Patchy fog and a chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Southeast wind around 7 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast for Newton

WhenTempForecastWindPrecip
Overnight 69°F Patchy Fog 7 mph SE 34%
Saturday 81°F Chance Showers And Thunderstorms 8 mph SW 55%
Saturday Night 62°F Chance Showers And Thunderstorms 6 to 9 mph N 43%
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%

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.