Mount Morris, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Morris, a village in Ogle County, Illinois.
Tonight
62°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. Low around 62, with temperatures rising to around 66 overnight. East northeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Mount Morris
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Showers And Thunderstorms | 5 to 10 mph ENE | 98% |
| Sunday | 65°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 74% |
| Sunday Night | 55°F | Chance Rain Showers | 15 mph NE | 26% |
| Monday | 63°F | Chance Rain Showers | 15 mph ENE | 47% |
| Monday Night | 50°F | Rain Showers Likely | 10 to 15 mph NE | 55% |
| Tuesday | 61°F | Rain Showers Likely | 10 to 15 mph NE | 55% |
| Tuesday Night | 48°F | Mostly Cloudy | 5 to 15 mph NE | 13% |
| Wednesday | 63°F | Partly Sunny | 10 mph NE | 6% |
| Wednesday Night | 50°F | Mostly Cloudy | 5 to 10 mph NE | 1% |
| Thursday | 66°F | Partly Sunny | 5 mph NE | 8% |
| Thursday Night | 52°F | Mostly Cloudy | 0 to 5 mph NE | 10% |
| Friday | 69°F | Partly Sunny | 0 to 5 mph NE | 8% |
| Friday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 8% |
| Saturday | 70°F | Mostly Sunny | 0 to 5 mph ENE | 4% |
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 20, 2026.