Niagara, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Niagara, a city in Dickinson County, Wisconsin.
Today
79°F
Mostly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between noon and 2pm, then a chance of showers and thunderstorms between 2pm and 3pm, then a slight chance of showers and thunderstorms between 3pm and 5pm. Mostly cloudy. High near 79, with temperatures falling to around 76 in the afternoon. Heat index values as high as 77. West wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Niagara
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 6 to 10 mph W | 25% |
| Tonight | 55°F | Slight Chance Rain Showers | 1 to 5 mph N | 20% |
| Wednesday | 78°F | Mostly Sunny | 1 to 5 mph WNW | 3% |
| Wednesday Night | 52°F | Partly Cloudy then Patchy Fog | 0 to 3 mph NE | 5% |
| Thursday | 83°F | Patchy Fog then Sunny | 1 to 8 mph SW | 2% |
| Thursday Night | 59°F | Mostly Clear | 7 mph SSW | 1% |
| Friday | 86°F | Sunny | 3 to 12 mph SW | 11% |
| Friday Night | 62°F | Chance Showers And Thunderstorms | 5 to 8 mph SW | 32% |
| Saturday | 84°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 8 mph WSW | 27% |
| Saturday Night | 60°F | Chance Showers And Thunderstorms | 2 to 7 mph SW | 45% |
| Sunday | 82°F | Chance Showers And Thunderstorms | 3 to 8 mph W | 45% |
| Sunday Night | 57°F | Chance Showers And Thunderstorms | 1 to 7 mph NW | 35% |
| Monday | 80°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 2 to 7 mph NW | 23% |
| Monday Night | 56°F | Slight Chance Showers And Thunderstorms | 1 to 7 mph NNW | 25% |
Forecast source: National Weather Service (api.weather.gov) for Niagara (45.779, -88.003). Updated through the day.
Growing snapshot for Niagara
Last spring frost
May 17
First fall frost
Oct 1
Growing season
135 days
Hardiness zone
4b
More local growing data for Niagara: nearby ZIP 49876 weather · frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Iron Mtn-Kingsford Wwtp, Mi (5.3 mi from Niagara). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.