Morrison, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Morrison, a city in Whiteside County, Illinois.
Tonight
64°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms between midnight and 5am, then showers and thunderstorms likely. Mostly cloudy. Low around 64, with temperatures rising to around 66 overnight. East wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Morrison
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 64°F | Mostly Cloudy then Chance Showers And Thunderstorms | 10 mph E | 64% |
| Saturday | 81°F | Showers And Thunderstorms | 5 to 10 mph SE | 76% |
| Saturday Night | 63°F | Showers And Thunderstorms | 5 to 10 mph N | 77% |
| Sunday | 70°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 77% |
| Sunday Night | 55°F | Rain Showers Likely | 15 mph NE | 64% |
| Monday | 66°F | Chance Rain Showers | 15 mph NE | 53% |
| Monday Night | 51°F | Chance Rain Showers | 10 to 15 mph NE | 45% |
| Tuesday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 31% |
| Tuesday Night | 48°F | Mostly Cloudy | 5 to 10 mph NE | 6% |
| Wednesday | 68°F | Mostly Sunny | 5 to 10 mph NE | 3% |
| Wednesday Night | 50°F | Partly Cloudy | 5 mph NE | 3% |
| Thursday | 69°F | Mostly Sunny | 5 mph NE | 4% |
| Thursday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 5% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Morrison (41.808, -89.962). Updated through the day.
Growing snapshot for Morrison
Last spring frost
Apr 26
First fall frost
Oct 13
Growing season
167 days
Hardiness zone
5b
More local growing data for Morrison: nearby ZIP 61270 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Morrison, Il (2.2 mi from Morrison). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.