Niagara, WI Weather & Growing Conditions
Today
80°F
Mostly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of rain showers between noon and 1pm, then a slight chance of showers and thunderstorms between 1pm and 2pm, then a chance of showers and thunderstorms between 2pm and 3pm, then a slight chance of showers and thunderstorms. Mostly cloudy. High near 80, with temperatures falling to around 76 in the afternoon. Heat index values as high as 78. West wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 6 to 10 mph W | 26% |
| Tonight | 56°F | Slight Chance Rain Showers | 1 to 5 mph N | 20% |
| Wednesday | 78°F | Mostly Sunny | 1 to 5 mph NW | 4% |
| Wednesday Night | 53°F | Partly Cloudy then Patchy Fog | 0 to 3 mph SE | 5% |
| Thursday | 83°F | Patchy Fog then Sunny | 1 to 7 mph SW | 1% |
| Thursday Night | 60°F | Mostly Clear | 6 mph SSW | 1% |
| Friday | 86°F | Sunny | 3 to 10 mph SW | 10% |
| Friday Night | 63°F | Chance Showers And Thunderstorms | 7 mph SW | 31% |
| Saturday | 84°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 7 mph WSW | 28% |
| Saturday Night | 61°F | Chance Showers And Thunderstorms | 1 to 6 mph SW | 45% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 3 to 8 mph W | 45% |
| Sunday Night | 58°F | Chance Showers And Thunderstorms | 2 to 7 mph NW | 35% |
| Monday | 80°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 2 to 6 mph NW | 23% |
| Monday Night | 57°F | Slight Chance Showers And Thunderstorms | 2 to 6 mph NNW | 25% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Niagara, WI
Last spring frost
May 17
First fall frost
Oct 1
Growing season
135 days
Hardiness zone
4b
Explore more for Niagara, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Iron Mtn-Kingsford Wwtp, Mi (6.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.