Griggsville, IL Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Griggsville, IL.

Current Conditions — Griggsville, IL

MOUNT STERLING (KI63)

Clear and Windy

63.5 F
Humidity:75%
Wind Speed: 19.7 G 26.4 mph
Barometer:29.77 in
Dewpoint:55.4 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 27 2026, 02:55 AM CDT
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5-Day Forecast — Griggsville, IL

Monday

High 78 °F
T-storms
Monday
Night
Low 50 °F
Chance of Scattered T-stormsg
Tuesday

High 66 °F
Mostly Cloudy
Tuesday
Night
Low 46 °F
Chance of Rain
Wednesday

High 64 °F
Partly Sunny
Wednesday
Night
Low 42 °F
Mostly Clear
Thursday

High 68 °F
Mostly Cloudy
Thursday
Night
Low 44 °F
Slight Chance of Rain
Friday

High 64 °F
Mostly Cloudy

Detailed Forecast — Griggsville, IL

Monday
Thunderstorms. High near 78°F. Wind 17 to 20 mph, with gusts as high as 31 mph.
Monday Night
Chance of Scattered Thunderstorms. Low around 50°F. Wind 9 to 16 mph, with gusts as high as 28 mph.
Tuesday
Mostly Cloudy. High near 66°F. Wind 6 to 8 mph, with gusts as high as 16 mph.
Tuesday Night
Chance of Rain. Low around 46°F. Wind 7 to 9 mph, with gusts as high as 17 mph.
Wednesday
Partly Sunny. High near 64°F. Wind 7 to 12 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly Clear. Low around 42°F. Wind around 2 mph, with gusts as high as 7 mph.
Thursday
Mostly Cloudy. High near 68°F. Wind 5 to 8 mph, with gusts as high as 15 mph.
Thursday Night
Slight Chance of Rain. Low around 44°F. Wind around 3 mph, with gusts as high as 9 mph.
Friday
Mostly Cloudy. High near 64°F. Wind 6 to 9 mph, with gusts as high as 16 mph.
Friday Night
Mostly Clear. Low around 41°F. Wind around 3 mph, with gusts as high as 8 mph.
Saturday
Partly Sunny. High near 68°F. Wind 3 to 7 mph, with gusts as high as 12 mph.
Saturday Night
Mostly Clear. Low around 46°F. Wind around 3 mph, with gusts as high as 8 mph.
Sunday
Partly Sunny. High near 73°F. Wind 3 to 8 mph, with gusts as high as 14 mph.
IL Radar
Current Radar • IL
Day 1 Outlook • April 27, 2026

Observation History — Griggsville, IL

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
02:55 AM CDT 19.7 G 26.4 10.00 Clear and Windy -- 63.5 55.4 75% NA NA 29.77 1008.1
02:35 AM CDT G 26.4 10.00 Clear -- 63.3 55.4 75% NA NA 29.78 1008.5
02:15 AM CDT 15.0 G 21.9 10.00 Clear -- 63.0 55.6 77% NA NA 29.81 1009.2
01:55 AM CDT 15.0 G 21.9 10.00 Clear 00.01 63.0 55.6 77% NA NA 29.81 1009.5
01:35 AM CDT 18.3 10.00 Partly Cloudy 00.01 61.9 56.3 82% NA NA 29.81 1009.2
01:15 AM CDT 16.1 10.00 Light Rain 00.01 61.0 56.7 86% NA NA 29.81 1009.5
12:55 AM CDT S 9.2 10.00 Drizzle 00.01 61.7 56.8 84% NA NA 29.86 1011.2
12:35 AM CDT S 8.1 10.00 Light Rain -- 62.4 56.3 80% NA NA 29.86 1011.2
12:15 AM CDT S 9.2 10.00 Light Drizzle -- 62.8 55.8 78% NA NA 29.85 1010.8
11:55 PM CDT 9.2 10.00 Light Rain -- 63.5 55.4 75% NA NA 29.86 1011.2
11:35 PM CDT 8.1 10.00 Light Rain -- 64.4 54.7 71% NA NA 29.86 1011.2
11:15 PM CDT 8.1 10.00 Light Rain -- 65.5 54.1 67% NA NA 29.86 1011.2
10:55 PM CDT 8.1 10.00 Light Rain -- 68.0 52.2 57% NA NA 29.86 1011.2
10:35 PM CDT SE 9.2 10.00 Mostly Cloudy -- 68.2 51.4 55% NA NA 29.87 1011.5
10:15 PM CDT SE 9.2 10.00 Mostly Cloudy -- 67.6 51.4 56% NA NA 29.87 1011.5
09:55 PM CDT SE 8.1 10.00 Partly Cloudy -- 67.1 50.9 56% NA NA 29.86 1011.2
09:35 PM CDT 8.1 10.00 Clear -- 67.8 50.0 53% NA NA 29.86 1011.2
09:15 PM CDT 8.1 10.00 Clear -- 67.6 49.3 52% NA NA 29.86 1011.2
08:55 PM CDT SE 6.9 10.00 Clear -- 67.5 49.6 53% NA NA 29.87 1011.5
08:35 PM CDT SE 8.1 10.00 NULL -- 68.7 48.6 49% NA NA 29.87 1011.5
08:15 PM CDT SE 6.9 10.00 Clear -- 69.8 48.2 46% NA NA 29.87 1011.5
07:55 PM CDT SE 8.1 10.00 Clear -- 70.2 47.3 44% NA 68.9 29.87 1011.5
07:35 PM CDT SE 8.1 10.00 Clear -- 70.7 47.3 43% NA 69.4 29.84 1010.5
07:15 PM CDT SE 10.3 10.00 Clear -- 71.8 47.8 43% NA 70.7 29.84 1010.5

Regional Weather Observation

MOUNT STERLING (KI63)

Clear and Windy
63.5 F

QUINCY MUNI/BALD (KUIN)

Light Rain
64.4 F

PITTSFIELD (KPPQ)

Mostly Cloudy
64.2 F

HANNIBAL (KHAE)

Cloudy
60.8 F

JACKSONVILLE (KIJX)

Cloudy
62.6 F

MACOMB MUNI (KMQB)

Clear
64.6 F
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