Omaha, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Omaha, a village in Gallatin County, Illinois.
This Afternoon
100°F
Slight Chance Showers And Thunderstorms
A slight chance of rain showers before 4pm, then a slight chance of showers and thunderstorms. Mostly sunny. High near 100, with temperatures falling to around 97 in the afternoon. Heat index values as high as 106. West southwest wind around 6 mph. Chance of precipitation is 20%.
7-day forecast for Omaha
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 100°F | Slight Chance Showers And Thunderstorms | 6 mph WSW | 19% |
| Tonight | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph ESE | 23% |
| Saturday | 98°F | Sunny | 1 to 7 mph SSW | 5% |
| Saturday Night | 72°F | Partly Cloudy | 3 mph SSW | 3% |
| Sunday | 97°F | Sunny | 3 to 8 mph WSW | 7% |
| Sunday Night | 69°F | Partly Cloudy | 5 mph NNE | 12% |
| Monday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 3 to 9 mph NNE | 40% |
| Monday Night | 63°F | Chance Showers And Thunderstorms | 6 to 10 mph NNE | 41% |
| Tuesday | 77°F | Chance Showers And Thunderstorms | 7 to 13 mph N | 35% |
| Tuesday Night | 58°F | Mostly Cloudy | 5 to 13 mph N | 8% |
| Wednesday | 76°F | Mostly Sunny | 5 to 9 mph N | 3% |
| Wednesday Night | 57°F | Partly Cloudy | 2 to 9 mph NNE | 3% |
| Thursday | 77°F | Mostly Sunny | 2 to 8 mph N | 3% |
| Thursday Night | 58°F | Partly Cloudy | 2 to 8 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Omaha (37.890, -88.306). Updated through the day.
Growing snapshot for Omaha
Last spring frost
Apr 15
First fall frost
Oct 19
Growing season
183 days
Hardiness zone
7a
More local growing data for Omaha: nearby ZIP 62871 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Carmi 3, Il (14.1 mi from Omaha). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.