Fostoria, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fostoria, a city in Clay County, Iowa.
Today
73°F
Chance Rain Showers then Chance Showers And Thunderstorms
Patchy smoke and a slight chance of rain showers before 10am, then a chance of rain showers and patchy smoke between 10am and 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 73. North wind 5 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Fostoria
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 15 mph N | 56% |
| Tonight | 54°F | Chance Showers And Thunderstorms then Mostly Cloudy | 0 to 5 mph NNW | 49% |
| Wednesday | 76°F | Mostly Sunny | 0 to 5 mph ENE | 1% |
| Wednesday Night | 53°F | Mostly Clear | 5 mph SSE | 0% |
| Thursday | 82°F | Sunny | 5 to 10 mph SSW | 0% |
| Thursday Night | 61°F | Mostly Clear | 5 to 10 mph S | 2% |
| Friday | 86°F | Sunny | 5 to 15 mph SSW | 7% |
| Friday Night | 64°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 15% |
| Saturday | 88°F | Sunny | 5 to 15 mph S | 10% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 25% |
| Sunday | 87°F | Chance Showers And Thunderstorms then Mostly Sunny | 10 mph SE | 25% |
| Sunday Night | 68°F | Partly Cloudy then Chance Showers And Thunderstorms | 10 mph E | 29% |
| Monday | 86°F | Chance Showers And Thunderstorms then Partly Sunny | 15 mph E | 29% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph NE | 27% |
Forecast source: National Weather Service (api.weather.gov) for Fostoria (43.243, -95.155). Updated through the day.
Growing snapshot for Fostoria
Last spring frost
May 1
First fall frost
Oct 3
Growing season
154 days
Hardiness zone
5a
More local growing data for Fostoria: nearby ZIP 51340 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Spencer 1 N, Ia (5.2 mi from Fostoria). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.