Newton, IA Weather & Growing Conditions
Today
81°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms between 1pm and 2pm, then a chance of showers and thunderstorms between 2pm and 4pm, then a slight chance of showers and thunderstorms. Partly sunny. High near 81, with temperatures falling to around 79 in the afternoon. West southwest wind around 8 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Chance Showers And Thunderstorms | 8 mph WSW | 38% |
| Tonight | 62°F | Chance Showers And Thunderstorms | 6 to 9 mph N | 42% |
| Sunday | 66°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 9 to 13 mph NNE | 48% |
| Sunday Night | 57°F | 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). Updated through the day.
Growing snapshot for Newton, IA
Last spring frost
Apr 22
First fall frost
Oct 17
Growing season
174 days
Hardiness zone
5b
Explore more for Newton, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Newton, Ia (0.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.