Point Forecast: De Kalb IL  41.92N 88.76W	Last Update: 5:46 am CDT May 8, 2026

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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: 7am Fri, May 8 20268am Fri, May 8 20269am Fri, May 8 202610am Fri, May 8 202611am Fri, May 8 202612pm Fri, May 8 20261pm Fri, May 8 20262pm Fri, May 8 20263pm Fri, May 8 20264pm Fri, May 8 20265pm Fri, May 8 20266pm Fri, May 8 20267pm Fri, May 8 20268pm Fri, May 8 20269pm Fri, May 8 202610pm Fri, May 8 202611pm Fri, May 8 202612am Sat, May 9 20261am Sat, May 9 20262am Sat, May 9 20263am Sat, May 9 20264am Sat, May 9 20265am Sat, May 9 20266am Sat, May 9 20267am Sat, May 9 20268am Sat, May 9 20269am Sat, May 9 202610am Sat, May 9 202611am Sat, May 9 202612pm Sat, May 9 20261pm Sat, May 9 20262pm Sat, May 9 20263pm Sat, May 9 20264pm Sat, May 9 20265pm Sat, May 9 20266pm Sat, May 9 20267pm Sat, May 9 20268pm Sat, May 9 20269pm Sat, May 9 202610pm Sat, May 9 202611pm Sat, May 9 202612am Sun, May 10 20261am Sun, May 10 20262am Sun, May 10 20263am Sun, May 10 20264am Sun, May 10 20265am Sun, May 10 20266am Sun, May 10 20267am Sun, May 10 20268am Sun, May 10 20269am Sun, May 10 202610am Sun, May 10 202611am Sun, May 10 202612pm Sun, May 10 20261pm Sun, May 10 20262pm Sun, May 10 20263pm Sun, May 10 20264pm Sun, May 10 20265pm Sun, May 10 20266pm Sun, May 10 20267pm Sun, May 10 20268pm Sun, May 10 20269pm Sun, May 10 202610pm Sun, May 10 202611pm Sun, May 10 202612am Mon, May 11 20261am Mon, May 11 20262am Mon, May 11 20263am Mon, May 11 20264am Mon, May 11 20265am Mon, May 11 20266am Mon, May 11 20267am Mon, May 11 20268am Mon, May 11 20269am Mon, May 11 202610am Mon, May 11 202611am Mon, May 11 202612pm Mon, May 11 20261pm Mon, May 11 20262pm Mon, May 11 20263pm Mon, May 11 20264pm Mon, May 11 20265pm Mon, May 11 20266pm Mon, May 11 20267pm Mon, May 11 20268pm Mon, May 11 20269pm Mon, May 11 202610pm Mon, May 11 202611pm Mon, May 11 202612am Tue, May 12 20261am Tue, May 12 20262am Tue, May 12 20263am Tue, May 12 20264am Tue, May 12 20265am Tue, May 12 20266am Tue, May 12 20267am Tue, May 12 20268am Tue, May 12 20269am Tue, May 12 202610am Tue, May 12 202611am Tue, May 12 202612pm Tue, May 12 20261pm Tue, May 12 20262pm Tue, May 12 20263pm Tue, May 12 20264pm Tue, May 12 20265pm Tue, May 12 20266pm Tue, May 12 2026

Date	05/08																	05/09
Hour (CDT)	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06
Temperature (°F)	42	47	52	57	60	62	64	65	66	67	67	66	64	59	56	52	51	50	50	49	49	49	49	48
Dewpoint (°F)	36	38	40	42	45	45	43	41	40	39	39	39	40	40	41	42	44	45	45	46	46	46	46	45
Heat Index (°F)
Surface Wind (mph)	5	5	7	7	7	7	7	7	8	9	9	9	7	6	6	6	7	8	8	9	9	10	10	11
Wind Dir	SE	SE	SSE	SSE	S	S	S	SSW	SSW	SW	SW	WSW	WSW	SW	SSW	SSW	SW	SW	SW	SW	SW	SW	SW	WSW
Gust								13	14	15	15	14									14	15	15	16
Sky Cover (%)	47	42	44	50	54	61	68	69	65	58	54	53	49	42	18	10	9	15	27	39	43	45	42	41
Precipitation Potential (%)	0	0	0	0	2	1	2	3	3	2	2	2	1	1	1	3	3	3	13	13	13	6	6	6
Relative Humidity (%)	78	71	63	59	58	53	46	41	38	36	36	37	42	49	57	66	76	82	85	87	89	90	90	92
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																		05/10
Hour (CDT)	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06
Temperature (°F)	50	53	58	61	63	66	68	68	70	70	69	68	65	61	57	54	52	50	49	47	46	45	44	43
Dewpoint (°F)	45	45	45	45	44	43	42	42	42	42	42	42	42	42	41	40	39	38	38	37	36	36	36	36
Heat Index (°F)
Surface Wind (mph)	11	11	13	13	14	15	17	18	18	17	16	15	11	9	8	7	7	6	5	5	5	3	5	5
Wind Dir	WSW	W	W	W	W	W	W	W	W	WNW	WNW	NW	NNW	NNW	N	N	N	NNW	NNW	NNW	N	N	N	N
Gust	18	18	20	20	21	23	25	28	28	26	24	23	18	16	15	14	13	11	10
Sky Cover (%)	40	20	21	28	42	27	41	48	52	57	62	67	61	53	44	40	40	42	45	44	42	40	34	27
Precipitation Potential (%)	4	3	1	0	0	2	4	7	8	15	13	12	10	3	3	3	3	3	5	5	5	5	5	5
Relative Humidity (%)	83	76	63	56	50	43	39	38	36	37	37	38	44	49	55	59	61	63	65	67	69	70	73	76
Rain	--	--	--	--	--	--	--	--	--	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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