Point Forecast: 2 Miles NNW Grantsburg IL  37.39N 88.77W	Last Update: 5:26 am CDT May 16, 2026

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Weather Elements Weather/Precipitation Probabilistic Forecasts (Experimental) Description | Survey Temperature (°C) Dewpoint (°C) Heat Index (°C) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Fog 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 Sat, May 16 20268am Sat, May 16 20269am Sat, May 16 202610am Sat, May 16 202611am Sat, May 16 202612pm Sat, May 16 20261pm Sat, May 16 20262pm Sat, May 16 20263pm Sat, May 16 20264pm Sat, May 16 20265pm Sat, May 16 20266pm Sat, May 16 20267pm Sat, May 16 20268pm Sat, May 16 20269pm Sat, May 16 202610pm Sat, May 16 202611pm Sat, May 16 202612am Sun, May 17 20261am Sun, May 17 20262am Sun, May 17 20263am Sun, May 17 20264am Sun, May 17 20265am Sun, May 17 20266am Sun, May 17 20267am Sun, May 17 20268am Sun, May 17 20269am Sun, May 17 202610am Sun, May 17 202611am Sun, May 17 202612pm Sun, May 17 20261pm Sun, May 17 20262pm Sun, May 17 20263pm Sun, May 17 20264pm Sun, May 17 20265pm Sun, May 17 20266pm Sun, May 17 20267pm Sun, May 17 20268pm Sun, May 17 20269pm Sun, May 17 202610pm Sun, May 17 202611pm Sun, May 17 202612am Mon, May 18 20261am Mon, May 18 20262am Mon, May 18 20263am Mon, May 18 20264am Mon, May 18 20265am Mon, May 18 20266am Mon, May 18 20267am Mon, May 18 20268am Mon, May 18 20269am Mon, May 18 202610am Mon, May 18 202611am Mon, May 18 202612pm Mon, May 18 20261pm Mon, May 18 20262pm Mon, May 18 20263pm Mon, May 18 20264pm Mon, May 18 20265pm Mon, May 18 20266pm Mon, May 18 20267pm Mon, May 18 20268pm Mon, May 18 20269pm Mon, May 18 202610pm Mon, May 18 202611pm Mon, May 18 202612am Tue, May 19 20261am Tue, May 19 20262am Tue, May 19 20263am Tue, May 19 20264am Tue, May 19 20265am Tue, May 19 20266am Tue, May 19 20267am Tue, May 19 20268am Tue, May 19 20269am Tue, May 19 202610am Tue, May 19 202611am Tue, May 19 202612pm Tue, May 19 20261pm Tue, May 19 20262pm Tue, May 19 20263pm Tue, May 19 20264pm Tue, May 19 20265pm Tue, May 19 20266pm Tue, May 19 20267pm Tue, May 19 20268pm Tue, May 19 20269pm Tue, May 19 202610pm Tue, May 19 202611pm Tue, May 19 202612am Wed, May 20 20261am Wed, May 20 20262am Wed, May 20 20263am Wed, May 20 20264am Wed, May 20 20265am Wed, May 20 20266am Wed, May 20 20267am Wed, May 20 20268am Wed, May 20 20269am Wed, May 20 202610am Wed, May 20 202611am Wed, May 20 202612pm Wed, May 20 20261pm Wed, May 20 20262pm Wed, May 20 20263pm Wed, May 20 20264pm Wed, May 20 20265pm Wed, May 20 20266pm Wed, May 20 2026

Date	05/16																	05/17
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 (°C)	21	22	23	24	26	27	28	28	29	29	29	29	28	26	24	23	23	22	22	21	20	19	19	18
Dewpoint (°C)	17	18	19	19	19	19	19	19	18	18	18	18	18	17	17	17	17	17	17	16	16	16	15	15
Heat Index (°C)				24	26	28	29	29	30	29	29	30	28	26	24
Surface Wind (mph)	7	7	8	9	10	10	10	10	10	9	8	8	7	5	3	3	3	3	5	3	3	5	5	5
Wind Dir	S	SSW	SSW	SW	SW	SW	SW	SW	SW	SSW	SSW	S	S	SSE	SE	SSE	SSE	SSE	SSE	SSE	S	S	SSE	S
Gust
Sky Cover (%)	88	78	74	68	65	65	58	65	54	58	67	44	50	49	30	36	36	37	43	55	63	73	52	40
Precipitation Potential (%)	51	51	34	25	31	23	26	13	17	19	14	13	7	8	10	6	6	6	3	4	4	4	3	4
Relative Humidity (%)	81	79	79	71	67	65	58	57	53	51	51	50	55	58	66	69	71	73	73	73	78	78	78	81
Rain	Chc	Chc	Chc	Chc	Chc	SChc	Chc	--	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	Chc	Chc	Chc	--	--	--	Chc	--	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																		05/18
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 (°C)	19	21	23	26	27	29	30	31	31	31	31	30	29	26	26	24	24	23	23	23	22	21	21	20
Dewpoint (°C)	15	16	17	17	17	17	16	16	16	14	14	14	15	14	14	14	14	14	14	15	15	16	16	17
Heat Index (°C)				26	28	30	30	31	31	30	30	29	29	26	26	24	24
Surface Wind (mph)	5	6	7	9	10	11	11	11	11	11	10	9	8	8	8	8	8	8	8	8	9	9	9	9
Wind Dir	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S
Gust
Sky Cover (%)	38	21	18	4	2	1	1	3	4	5	16	1	1	1	2	3	7	10	14	21	28	35	38	41
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	8	8	8	8	8	8
Relative Humidity (%)	75	73	68	58	54	46	43	40	39	38	38	39	43	49	48	52	54	55	57	62	66	71	76	81
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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