Hartford, WI Weather & Growing Conditions
Today
66°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a high near 66. East wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Showers And Thunderstorms | 5 to 10 mph E | 76% |
| Tonight | 58°F | Showers And Thunderstorms | 5 to 10 mph NE | 80% |
| Sunday | 64°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 32% |
| Sunday Night | 51°F | Mostly Cloudy | 10 to 15 mph NE | 1% |
| Monday | 61°F | Mostly Cloudy | 10 to 15 mph NE | 5% |
| Monday Night | 47°F | Mostly Cloudy | 5 to 10 mph NE | 3% |
| Tuesday | 60°F | Partly Sunny | 5 to 15 mph NE | 5% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 10 mph NE | 5% |
| Wednesday | 63°F | Mostly Sunny | 5 to 10 mph NE | 4% |
| Wednesday Night | 48°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 65°F | Mostly Sunny | 0 to 5 mph NE | 4% |
| Thursday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Friday | 69°F | Mostly Sunny | 0 to 5 mph NE | 3% |
| Friday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hartford, WI
Last spring frost
May 8
First fall frost
Oct 3
Growing season
148 days
Hardiness zone
5a
Explore more for Hartford, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Hartford Wwtp, Wi (2.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.