New London, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New London, a city in Henry County, Iowa.
This Afternoon
85°F
Slight Chance Showers And Thunderstorms
A slight chance of rain showers before 4pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 85. South wind around 10 mph. Chance of precipitation is 20%.
7-day forecast for New London
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Slight Chance Showers And Thunderstorms | 10 mph S | 21% |
| Tonight | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph NW | 82% |
| Sunday | 73°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 15 mph NE | 81% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 65% |
| Monday | 64°F | Showers And Thunderstorms Likely | 15 mph NE | 65% |
| Monday Night | 53°F | Chance Rain Showers | 10 mph NE | 49% |
| Tuesday | 62°F | Chance Rain Showers | 10 mph NE | 44% |
| Tuesday Night | 48°F | Partly Cloudy | 5 to 10 mph NE | 4% |
| Wednesday | 67°F | Mostly Sunny | 5 mph NE | 0% |
| Wednesday Night | 52°F | Partly Cloudy | 5 mph NE | 2% |
| Thursday | 69°F | Partly Sunny | 5 mph NE | 6% |
| Thursday Night | 55°F | Partly Cloudy | 0 to 5 mph NE | 5% |
| Friday | 72°F | Mostly Sunny | 5 mph E | 5% |
| Friday Night | 55°F | Partly Cloudy | 5 mph E | 6% |
Forecast source: National Weather Service (api.weather.gov) for New London (40.923, -91.401). Updated through the day.
Growing snapshot for New London
Last spring frost
Apr 30
First fall frost
Oct 10
Growing season
163 days
Hardiness zone
5b
More local growing data for New London: nearby ZIP 52645 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mt Pleasant 1 Ssw, Ia (8.7 mi from New London). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.