New Hartford, IA Weather & Growing Conditions
This Afternoon
71°F
Cloudy
Cloudy. High near 71, with temperatures falling to around 67 in the afternoon. Southeast wind around 14 mph, with gusts as high as 23 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Cloudy | 14 mph SE | 13% |
| Tonight | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 9 to 13 mph SE | 78% |
| Saturday | 77°F | Chance Showers And Thunderstorms | 8 mph SW | 49% |
| Saturday Night | 59°F | Chance Showers And Thunderstorms | 8 to 12 mph N | 40% |
| Sunday | 67°F | Chance Rain Showers | 13 to 16 mph NE | 45% |
| Sunday Night | 53°F | Chance Rain Showers | 12 to 15 mph ENE | 26% |
| Monday | 61°F | Chance Rain Showers | 14 mph ENE | 54% |
| Monday Night | 48°F | Chance Rain Showers | 8 to 13 mph NE | 54% |
| Tuesday | 60°F | Chance Rain Showers then Partly Sunny | 9 mph ENE | 28% |
| Tuesday Night | 46°F | Partly Cloudy | 2 to 7 mph ENE | 3% |
| Wednesday | 65°F | Mostly Sunny | 5 mph ENE | 0% |
| Wednesday Night | 50°F | Partly Cloudy | 3 mph ESE | 4% |
| Thursday | 67°F | Partly Sunny | 3 mph SE | 12% |
| Thursday Night | 52°F | Partly Cloudy | 2 mph ESE | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for New Hartford, IA
Last spring frost
Apr 27
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
5a
Explore more for New Hartford, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Waterloo Muni Ap, Ia (12.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.