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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
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 Sep 19, 2026.