Griggsville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Griggsville, a city in Pike County, Illinois.
Today
88°F
Mostly Sunny
Mostly sunny, with a high near 88. South wind around 6 mph.
7-day forecast for Griggsville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny | 6 mph S | 0% |
| Tonight | 69°F | Partly Cloudy | 5 mph S | 11% |
| Wednesday | 88°F | Mostly Sunny then Scattered Showers And Thunderstorms | 5 mph S | 42% |
| Wednesday Night | 68°F | Scattered Showers And Thunderstorms then Showers And Thunderstorms | 6 mph N | 89% |
| Thursday | 84°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph SW | 89% |
| Thursday Night | 66°F | Partly Cloudy | 0 to 3 mph SE | 13% |
| Friday | 86°F | Partly Sunny | 2 mph S | 8% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 2 mph S | 25% |
| Saturday | 89°F | Chance Showers And Thunderstorms then Sunny | 5 mph SW | 25% |
| Saturday Night | 72°F | Mostly Clear | 5 to 8 mph S | 5% |
| Sunday | 91°F | Sunny | 8 to 12 mph SW | 3% |
| Sunday Night | 74°F | Mostly Clear | 7 to 10 mph S | 8% |
| Monday | 91°F | Mostly Sunny | 7 to 10 mph SW | 9% |
| Monday Night | 74°F | Slight Chance Showers And Thunderstorms | 7 to 10 mph S | 24% |
Forecast source: National Weather Service (api.weather.gov) for Griggsville (39.708, -90.728). Updated through the day.
Growing snapshot for Griggsville
Last spring frost
Apr 18
First fall frost
Oct 15
Growing season
179 days
Hardiness zone
6a
More local growing data for Griggsville: nearby ZIP 62340 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Perry 6 Nw, Il (7.1 mi from Griggsville). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.