Princeton, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Princeton, a city in Scott County, Iowa.
Today
86°F
Mostly Sunny
Mostly sunny. High near 86, with temperatures falling to around 84 in the afternoon. Southwest wind 5 to 10 mph.
7-day forecast for Princeton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 5 to 10 mph SW | 13% |
| Tonight | 68°F | Showers And Thunderstorms Likely | 5 mph N | 82% |
| Wednesday | 78°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph N | 77% |
| Wednesday Night | 62°F | Showers And Thunderstorms Likely | 5 mph N | 74% |
| Thursday | 80°F | Chance Rain Showers then Mostly Sunny | 5 mph NE | 44% |
| Thursday Night | 62°F | Mostly Clear | 0 mph | 8% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 65°F | Mostly Clear | 0 to 5 mph S | 8% |
| Saturday | 85°F | Sunny | 5 to 10 mph S | 10% |
| Saturday Night | 71°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 18% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph SW | 18% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 36% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 36% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 mph W | 35% |
Forecast source: National Weather Service (api.weather.gov) for Princeton (41.669, -90.358). Updated through the day.
Growing snapshot for Princeton
Last spring frost
Apr 16
First fall frost
Oct 25
Growing season
190 days
Hardiness zone
5b
More local growing data for Princeton: nearby ZIP 52768 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
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Blue Grass
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Donahue
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Le Claire
Long Grove
Maysville
McCausland
New Liberty
Panorama Park
Park View
Plainview
Riverdale
Stockton
Walcott
Climate data from the nearest NOAA station, Le Claire L&D 14, Ia (8.7 mi from Princeton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.