Mount Morris, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Morris, a village in Ogle County, Illinois.
Today
78°F
Showers And Thunderstorms
Showers and thunderstorms before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then showers and thunderstorms likely. Cloudy. High near 78, with temperatures falling to around 75 in the afternoon. Southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
7-day forecast for Mount Morris
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Showers And Thunderstorms | 5 to 10 mph SE | 100% |
| Tonight | 62°F | Showers And Thunderstorms | 5 to 10 mph ENE | 91% |
| Sunday | 68°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 55% |
| Sunday Night | 55°F | Chance Rain Showers | 15 mph NE | 34% |
| Monday | 64°F | Chance Rain Showers | 15 mph ENE | 45% |
| Monday Night | 49°F | Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Tuesday | 62°F | Slight Chance Rain Showers then Partly Sunny | 10 to 15 mph NE | 15% |
| Tuesday Night | 48°F | Partly Cloudy | 5 to 15 mph NE | 11% |
| Wednesday | 65°F | Mostly Sunny | 10 to 15 mph NE | 2% |
| Wednesday Night | 50°F | Partly Cloudy | 5 to 10 mph NE | 1% |
| Thursday | 67°F | Mostly Sunny | 5 to 10 mph NNE | 4% |
| Thursday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 70°F | Mostly Sunny | 5 to 10 mph NE | 3% |
| Friday Night | 51°F | Partly Cloudy | 0 to 5 mph ENE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Mount Morris (42.048, -89.429). Updated through the day.
Growing snapshot for Mount Morris
Last spring frost
Apr 29
First fall frost
Oct 7
Growing season
161 days
Hardiness zone
5b
More local growing data for Mount Morris: nearby ZIP 61054 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Baileyville
Byron
Creston
Davis Junction
Forreston
Hillcrest
Holcomb
Kings
Leaf River
Monroe Center
Oregon
Polo
Rochelle
Stillman Valley
Climate data from the nearest NOAA station, Polo 5Nw, Il (8.4 mi from Mount Morris). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.