Harpster, OH Weather & Growing Conditions
Today
80°F
Chance Showers And Thunderstorms
A slight chance of rain showers between 11am and 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Southeast wind around 7 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Chance Showers And Thunderstorms | 7 mph SE | 54% |
| Tonight | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 mph S | 58% |
| Sunday | 78°F | Showers And Thunderstorms | 6 to 13 mph NW | 79% |
| Sunday Night | 56°F | Rain Showers Likely | 14 mph NE | 65% |
| Monday | 68°F | Chance Rain Showers | 14 mph NE | 46% |
| Monday Night | 52°F | Chance Rain Showers | 14 mph NE | 45% |
| Tuesday | 67°F | Mostly Cloudy then Slight Chance Rain Showers | 14 mph NE | 17% |
| Tuesday Night | 54°F | Showers And Thunderstorms Likely | 16 mph NE | 59% |
| Wednesday | 68°F | Showers And Thunderstorms Likely | 15 mph E | 59% |
| Wednesday Night | 53°F | Rain Showers Likely | 9 to 14 mph E | 59% |
| Thursday | 69°F | Mostly Cloudy then Slight Chance Rain Showers | 8 to 12 mph NE | 17% |
| Thursday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 12 mph NE | 17% |
| Friday | 71°F | Mostly Sunny then Slight Chance Rain Showers | 6 to 14 mph NE | 15% |
| Friday Night | 50°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 13 mph NE | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Harpster, OH
Last spring frost
Apr 29
First fall frost
Oct 17
Growing season
171 days
Hardiness zone
6a
Explore more for Harpster, OH: full frost dates · planting calendar · Ohio frost dates
Climate data from the nearest NOAA station, Upper Sandusky, Oh (7.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.