Adair, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Adair, a community in Mcdonough County, Illinois.
Today
88°F
Sunny
Sunny, with a high near 88. South wind 0 to 5 mph.
7-day forecast for Adair
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Sunny | 0 to 5 mph S | 0% |
| Tonight | 68°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 0 to 5 mph S | 18% |
| Wednesday | 84°F | Chance Showers And Thunderstorms | 0 mph | 51% |
| Wednesday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 mph | 89% |
| Thursday | 81°F | Showers And Thunderstorms | 0 mph | 85% |
| Thursday Night | 63°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 17% |
| Friday | 83°F | Mostly Sunny | 0 mph | 5% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 0 mph | 23% |
| Saturday | 86°F | Slight Chance Showers And Thunderstorms then Sunny | 0 mph | 17% |
| Saturday Night | 70°F | Mostly Clear | 0 to 5 mph S | 8% |
| Sunday | 88°F | Sunny | 5 to 10 mph SW | 6% |
| Sunday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 mph S | 15% |
| Monday | 88°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph SW | 15% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 5 mph SW | 28% |
Forecast source: National Weather Service (api.weather.gov) for Adair (40.418, -90.497). Updated through the day.
Growing snapshot for Adair
Last spring frost
Apr 17
First fall frost
Oct 22
Growing season
185 days
Hardiness zone
6a
More local growing data for Adair: nearby ZIP 61411 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Bardolph
Blandinsville
Bushnell
Colchester
Georgetown
Good Hope
Industry
Macomb
Prairie City
Sciota
Tennessee
Climate data from the nearest NOAA station, Prairie City 2S, Il (13.3 mi from Adair). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.