Newton, IA Weather & Growing Conditions
This Afternoon
69°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. High near 69, with temperatures falling to around 64 in the afternoon. South southeast wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Showers And Thunderstorms | 8 to 13 mph SSE | 76% |
| Tonight | 48°F | Showers And Thunderstorms Likely | 7 to 13 mph WNW | 60% |
| Wednesday | 53°F | Chance Rain Showers | 15 mph W | 29% |
| Wednesday Night | 44°F | Mostly Cloudy then Slight Chance Rain Showers | 13 mph WSW | 21% |
| Thursday | 53°F | Rain Showers Likely | 12 mph WNW | 56% |
| Thursday Night | 41°F | Mostly Cloudy | 8 mph NNW | 11% |
| Friday | 52°F | Partly Sunny | 5 to 8 mph N | 5% |
| Friday Night | 34°F | Partly Cloudy | 0 to 3 mph NNW | 0% |
| Saturday | 56°F | Mostly Sunny | 0 to 5 mph WSW | 1% |
| Saturday Night | 37°F | Mostly Clear | 5 mph W | 4% |
| Sunday | 61°F | Sunny | 7 mph WNW | 5% |
| Sunday Night | 39°F | Mostly Clear | 6 mph SW | 1% |
| Monday | 65°F | Sunny | 6 to 10 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 7 mph WNW | 0% |
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 Nov 3, 2026.