Point Forecast: 3 Miles W Illiopolis IL  39.85N 89.31W (Elev. 600 ft)	Last Update: 5:55 pm CDT Jun 19, 2025

[hide menu]

Weather Elements Fire Weather Probabilistic Forecasts (Experimental) Description | Survey Temperature (°F) Dewpoint (°F) Heat Index (°F) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Fog Mixing Height  x100ftx100m Trans. Wind  ktmphkm/hm/s 20ft Wind  ktmphkm/hm/s Vent Rate (x1000 mph-ft) Quantitative Precipitation  3-hr6-hr12-hr24-hr   info     0.100.250.501.00 Snowfall  3-hr6-hr12-hr24-hr   info     0.1in1in3in6in12in

48-Hour Period Starting: 12am Fri, Jun 20 20251am Fri, Jun 20 20252am Fri, Jun 20 20253am Fri, Jun 20 20254am Fri, Jun 20 20255am Fri, Jun 20 20256am Fri, Jun 20 20257am Fri, Jun 20 20258am Fri, Jun 20 20259am Fri, Jun 20 202510am Fri, Jun 20 202511am Fri, Jun 20 202512pm Fri, Jun 20 20251pm Fri, Jun 20 20252pm Fri, Jun 20 20253pm Fri, Jun 20 20254pm Fri, Jun 20 20255pm Fri, Jun 20 20256pm Fri, Jun 20 20257pm Fri, Jun 20 20258pm Fri, Jun 20 20259pm Fri, Jun 20 202510pm Fri, Jun 20 202511pm Fri, Jun 20 202512am Sat, Jun 21 20251am Sat, Jun 21 20252am Sat, Jun 21 20253am Sat, Jun 21 20254am Sat, Jun 21 20255am Sat, Jun 21 20256am Sat, Jun 21 20257am Sat, Jun 21 20258am Sat, Jun 21 20259am Sat, Jun 21 202510am Sat, Jun 21 202511am Sat, Jun 21 202512pm Sat, Jun 21 20251pm Sat, Jun 21 20252pm Sat, Jun 21 20253pm Sat, Jun 21 20254pm Sat, Jun 21 20255pm Sat, Jun 21 20256pm Sat, Jun 21 20257pm Sat, Jun 21 20258pm Sat, Jun 21 20259pm Sat, Jun 21 202510pm Sat, Jun 21 202511pm Sat, Jun 21 202512am Sun, Jun 22 20251am Sun, Jun 22 20252am Sun, Jun 22 20253am Sun, Jun 22 20254am Sun, Jun 22 20255am Sun, Jun 22 20256am Sun, Jun 22 20257am Sun, Jun 22 20258am Sun, Jun 22 20259am Sun, Jun 22 202510am Sun, Jun 22 202511am Sun, Jun 22 202512pm Sun, Jun 22 20251pm Sun, Jun 22 20252pm Sun, Jun 22 20253pm Sun, Jun 22 20254pm Sun, Jun 22 20255pm Sun, Jun 22 20256pm Sun, Jun 22 20257pm Sun, Jun 22 20258pm Sun, Jun 22 20259pm Sun, Jun 22 202510pm Sun, Jun 22 202511pm Sun, Jun 22 202512am Mon, Jun 23 20251am Mon, Jun 23 20252am Mon, Jun 23 20253am Mon, Jun 23 20254am Mon, Jun 23 20255am Mon, Jun 23 20256am Mon, Jun 23 20257am Mon, Jun 23 20258am Mon, Jun 23 20259am Mon, Jun 23 202510am Mon, Jun 23 202511am Mon, Jun 23 202512pm Mon, Jun 23 20251pm Mon, Jun 23 20252pm Mon, Jun 23 20253pm Mon, Jun 23 20254pm Mon, Jun 23 20255pm Mon, Jun 23 20256pm Mon, Jun 23 20257pm Mon, Jun 23 20258pm Mon, Jun 23 20259pm Mon, Jun 23 202510pm Mon, Jun 23 202511pm Mon, Jun 23 202512am Tue, Jun 24 20251am Tue, Jun 24 20252am Tue, Jun 24 20253am Tue, Jun 24 20254am Tue, Jun 24 20255am Tue, Jun 24 20256am Tue, Jun 24 20257am Tue, Jun 24 20258am Tue, Jun 24 20259am Tue, Jun 24 202510am Tue, Jun 24 202511am Tue, Jun 24 2025

Date	06/20
Hour (CDT)	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Temperature (°F)	70	69	67	66	66	65	66	68	72	77	80	81	83	84	85	85	85	86	84	84	83	80	79	78
Dewpoint (°F)	63	63	63	63	62	62	62	64	66	67	68	68	67	67	68	68	68	69	70	71	71	70	70	70
Heat Index (°F)										77	82	83	86	87	88	89	89	90	89	88	87	83	82	78
Surface Wind (mph)	5	5	5	5	5	5	6	5	7	8	10	11	10	9	10	13	13	14	14	14	14	14	14	14
Wind Dir	SSW	SSW	SSW	SSW	SSW	S	S	S	SSW	SSW	SSW	S	S	SSW	S	S	S	S	S	S	S	S	S	S
Gust									16	17	17	17	16	15	17	18	21	22	23	22	22	23	24	24
Sky Cover (%)	5	2	3	3	3	5	5	5	9	19	27	47	54	53	52	45	45	32	19	14	10	9	5	7
Precipitation Potential (%)	0	0	0	0	0	0	0	1	1	1	2	2	2	6	6	6	7	7	7	0	0	0	0	0
Relative Humidity (%)	80	82	86	89	86	89	88	87	81	72	68	66	58	56	58	56	56	58	62	66	68	72	74	76
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date	06/21
Hour (CDT)	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Temperature (°F)	78	77	76	76	75	75	75	75	78	81	84	85	87	89	90	91	91	91	90	89	87	85	83	82
Dewpoint (°F)	70	70	70	70	70	71	71	73	74	74	75	75	76	76	76	76	76	76	76	76	75	75	74	73
Heat Index (°F)	78	77	76	76	75	75	75	75	78	86	92	94	98	100	102	103	103	103	102	100	96	94	90	87
Surface Wind (mph)	14	13	13	13	13	13	13	14	15	16	17	17	17	17	17	17	17	16	15	14	14	14	14	13
Wind Dir	S	S	S	S	S	S	SSW	S	S	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	S	S	S	S	S	S
Gust	24	24	23	23	23	23	23	22	23	23	24	24	25	25	25	25	25	24	22	21	21	21	21	21
Sky Cover (%)	7	6	5	4	5	8	10	6	5	4	3	4	4	5	5	6	6	6	6	6	5	5	4	5
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	76	79	81	83	85	87	87	94	88	79	74	72	70	66	64	62	62	62	64	66	68	72	74	74
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

International System of Units Forecast Discussion 7-Day Forecast Hourly Weather Graph Hazardous Weather Cooperative Observers River Info (NWPS) Local Climate NOAA Weather Radio Home