Hartford, WI Weather & Growing Conditions
Overnight
58°F
Light Rain
Rain. Cloudy, with a low around 58. South wind around 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Light Rain | 10 mph S | 91% |
| Wednesday | 62°F | Chance Light Rain | 10 to 15 mph S | 31% |
| Wednesday Night | 45°F | Cloudy then Chance Light Rain | 15 mph SW | 51% |
| Thursday | 53°F | Light Rain Likely | 5 to 15 mph W | 65% |
| Thursday Night | 37°F | Chance Light Rain then Mostly Cloudy | 10 mph N | 30% |
| Friday | 47°F | Partly Sunny | 5 to 15 mph N | 11% |
| Friday Night | 30°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 49°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 0 to 5 mph W | 3% |
| Sunday | 55°F | Sunny | 5 to 10 mph W | 8% |
| Sunday Night | 34°F | Mostly Clear | 0 to 5 mph W | 1% |
| Monday | 58°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 to 10 mph W | 1% |
| Tuesday | 58°F | Sunny | 5 to 10 mph NW | 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 Nov 4, 2026.