Princeton, IA Weather & Growing Conditions
Overnight
67°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 1am and 4am, then patchy fog and a chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Southeast wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 67°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 42% |
| Saturday | 81°F | Patchy Fog | 5 to 10 mph SE | 89% |
| Saturday Night | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph NW | 85% |
| Sunday | 70°F | Rain Showers Likely | 10 to 15 mph NE | 74% |
| Sunday Night | 57°F | Chance Rain Showers | 10 to 15 mph NE | 42% |
| Monday | 65°F | Chance Rain Showers | 15 mph NE | 53% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 41% |
| Tuesday | 63°F | Slight Chance Rain Showers | 10 to 15 mph NE | 19% |
| Tuesday Night | 49°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 67°F | Mostly Sunny | 5 to 10 mph NE | 2% |
| Wednesday Night | 52°F | Partly Cloudy | 5 mph NE | 1% |
| Thursday | 68°F | Partly Sunny | 5 mph NE | 5% |
| Thursday Night | 54°F | Partly Cloudy | 5 mph NE | 5% |
| Friday | 71°F | Mostly Sunny | 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Princeton, IA
Last spring frost
Apr 16
First fall frost
Oct 25
Growing season
190 days
Hardiness zone
5b
Explore more for Princeton, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Le Claire L&D 14, Ia (8.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.