Holcomb, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Holcomb, a community in Ogle County, Illinois.
Overnight
61°F
Mostly Clear
Mostly clear, with a low around 61. South wind around 5 mph.
7-day forecast for Holcomb
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 84°F | Mostly Sunny | 5 to 10 mph SSW | 3% |
| Tuesday Night | 66°F | Chance Showers And Thunderstorms | 5 mph SW | 69% |
| Wednesday | 77°F | Showers And Thunderstorms Likely | 5 mph W | 74% |
| Wednesday Night | 61°F | Showers And Thunderstorms | 0 to 5 mph NNW | 78% |
| Thursday | 78°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 40% |
| Thursday Night | 59°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph ESE | 17% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph S | 11% |
| Friday Night | 62°F | Mostly Clear | 0 to 5 mph SSW | 11% |
| Saturday | 83°F | Mostly Sunny | 5 to 10 mph SSW | 10% |
| Saturday Night | 68°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 20% |
| Sunday | 85°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SW | 20% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 40% |
| Monday | 84°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 38% |
Forecast source: National Weather Service (api.weather.gov) for Holcomb (42.065, -89.097). Updated through the day.
Growing snapshot for Holcomb
Last spring frost
Apr 24
First fall frost
Oct 17
Growing season
174 days
Hardiness zone
5b
More local growing data for Holcomb: nearby ZIP 61043 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Baileyville
Byron
Creston
Davis Junction
Forreston
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Leaf River
Monroe Center
Mount Morris
Oregon
Polo
Rochelle
Stillman Valley
Climate data from the nearest NOAA station, Rockford Gtr Rockford Ap, Il (8.7 mi from Holcomb). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.