Olive Branch, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Olive Branch, a community in Alexander County, Illinois.
Overnight
66°F
Patchy Fog
Patchy fog. Mostly clear. Low around 66, with temperatures rising to around 69 overnight. North wind around 1 mph.
7-day forecast for Olive Branch
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Patchy Fog | 1 mph N | 0% |
| Tuesday | 86°F | Patchy Fog then Sunny | 2 mph ENE | 0% |
| Tuesday Night | 66°F | Mostly Clear | 1 mph ENE | 0% |
| Wednesday | 88°F | Sunny | 1 mph S | 0% |
| Wednesday Night | 70°F | Partly Cloudy | 2 mph SSE | 0% |
| Thursday | 89°F | Slight Chance Showers And Thunderstorms | 1 to 6 mph SSW | 18% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 1 to 5 mph S | 49% |
| Friday | 88°F | Chance Showers And Thunderstorms | 5 mph SSW | 49% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 3 mph SSW | 41% |
| Saturday | 88°F | Chance Showers And Thunderstorms | 3 mph SSW | 34% |
| Saturday Night | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 2 mph S | 21% |
| Sunday | 90°F | Mostly Sunny | 2 to 7 mph SSW | 10% |
| Sunday Night | 72°F | Mostly Clear | 2 to 6 mph SSW | 7% |
| Monday | 91°F | Sunny | 3 to 7 mph SSW | 5% |
Forecast source: National Weather Service (api.weather.gov) for Olive Branch (37.184, -89.350). Updated through the day.
Growing snapshot for Olive Branch
Last spring frost
Apr 2
First fall frost
Oct 31
Growing season
211 days
Hardiness zone
7a
More local growing data for Olive Branch: nearby ZIP 62969 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Cairo 3N, Il (10.6 mi from Olive Branch). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.