Fostoria, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fostoria, a city in Clay County, Iowa.
Overnight
63°F
Areas Of Fog
Areas of fog and a slight chance of showers and thunderstorms. Cloudy. Low around 63, with temperatures rising to around 67 overnight. East northeast wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts between three quarters and one inch possible.
7-day forecast for Fostoria
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Areas Of Fog | 5 mph ENE | 19% |
| Saturday | 68°F | Areas Of Fog | 5 to 15 mph N | 27% |
| Saturday Night | 56°F | Slight Chance Rain Showers then Cloudy | 10 to 15 mph NNE | 16% |
| Sunday | 66°F | Mostly Cloudy | 15 mph NE | 14% |
| Sunday Night | 52°F | Chance Rain Showers | 10 to 15 mph ENE | 37% |
| Monday | 61°F | Chance Rain Showers | 10 mph ENE | 50% |
| Monday Night | 46°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph ENE | 29% |
| Tuesday | 61°F | Partly Sunny | 5 to 10 mph E | 5% |
| Tuesday Night | 46°F | Partly Cloudy | 5 mph ESE | 1% |
| Wednesday | 65°F | Mostly Sunny | 5 mph SE | 4% |
| Wednesday Night | 50°F | Partly Cloudy then Slight Chance Rain Showers | 5 mph SSE | 21% |
| Thursday | 68°F | Slight Chance Rain Showers | 5 mph SSE | 21% |
| Thursday Night | 52°F | Mostly Cloudy | 5 mph SSE | 10% |
| Friday | 69°F | Partly Sunny | 5 to 10 mph SE | 10% |
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 Sep 19, 2026.