Griggsville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Griggsville, a city in Pike County, Illinois.
This Afternoon
90°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5pm. Sunny, with a high near 90. Heat index values as high as 101. East wind around 5 mph. Chance of precipitation is 20%.
7-day forecast for Griggsville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 90°F | Slight Chance Showers And Thunderstorms | 5 mph E | 17% |
| Tonight | 72°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 6 mph SE | 16% |
| Saturday | 94°F | Partly Sunny | 5 to 8 mph SW | 9% |
| Saturday Night | 70°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SW | 29% |
| Sunday | 84°F | Showers And Thunderstorms Likely | 2 to 8 mph NW | 68% |
| Sunday Night | 62°F | Showers And Thunderstorms Likely | 7 to 12 mph NE | 71% |
| Monday | 70°F | Showers And Thunderstorms Likely | 8 to 12 mph NE | 71% |
| Monday Night | 56°F | Chance Showers And Thunderstorms | 8 to 13 mph NE | 49% |
| Tuesday | 66°F | Chance Rain Showers | 10 mph NE | 32% |
| Tuesday Night | 52°F | Mostly Cloudy | 5 to 9 mph N | 4% |
| Wednesday | 70°F | Mostly Sunny | 7 mph N | 1% |
| Wednesday Night | 54°F | Partly Cloudy | 2 to 6 mph NE | 1% |
| Thursday | 72°F | Mostly Sunny | 2 to 6 mph NE | 5% |
| Thursday Night | 56°F | Partly Cloudy | 5 mph NE | 5% |
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 Sep 19, 2026.