Point Forecast: 4 Miles NE Riverdale IL  41.68N 87.57W	Last Update: 3:56 am CDT May 17, 2026

[hide menu]

Weather Elements Fire Weather 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 Mixing Height  x100ftx100m Trans. Wind  ktmphkm/hm/s 20ft Wind  ktmphkm/hm/s Vent Rate (x1000 mph-m) 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 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 20267pm Wed, May 20 20268pm Wed, May 20 20269pm Wed, May 20 202610pm Wed, May 20 202611pm Wed, May 20 202612am Thu, May 21 20261am Thu, May 21 20262am Thu, May 21 20263am Thu, May 21 20264am Thu, May 21 20265am Thu, May 21 20266am Thu, May 21 20267am Thu, May 21 20268am Thu, May 21 20269am Thu, May 21 202610am Thu, May 21 202611am Thu, May 21 202612pm Thu, May 21 20261pm Thu, May 21 20262pm Thu, May 21 20263pm Thu, May 21 20264pm Thu, May 21 20265pm Thu, May 21 20266pm Thu, May 21 2026

Date	05/17																	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)	18	20	22	23	24	26	28	29	29	29	29	29	27	26	25	24	23	22	22	22	21	21	21	21
Dewpoint (°C)	16	17	17	17	17	18	17	17	16	16	16	16	16	16	16	16	16	16	15	15	14	14	14	14
Heat Index (°C)					24	26	28	29	29	29	29	29	28	26	25	24
Surface Wind (mph)	10	15	14	13	16	17	17	18	20	21	20	18	17	15	14	14	14	14	14	14	14	14	15	15
Wind Dir	S	NNE	ESE	SSE	S	S	S	S	S	S	SSW	SSW	S	S	S	S	S	S	S	SSW	SSW	SSW	SSW	SSW
Gust				21			25	28	29	29	29	28	26	23	22	22	22	23	23	23	23	23	23	25
Sky Cover (%)	76	73	73	71	67	63	61	57	55	56	56	54	51	43	34	20	18	16	17	21	27	31	34	37
Precipitation Potential (%)	10	11	11	10	9	7	4	4	4	2	3	2	1	1	0	1	1	1	1	1	1	2	2	3
Relative Humidity (%)	87	79	74	69	65	60	54	48	44	43	44	45	49	53	56	60	62	64	66	66	64	64	66	67
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																		05/19
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	23	24	26	27	28	28	29	28	28	28	28	27	26	24	23	22	21	20	20	21	21	20	19
Dewpoint (°C)	15	16	17	18	19	19	19	19	20	20	19	19	19	19	19	19	19	18	18	18	18	18	18	18
Heat Index (°C)			24	26	28	30	30	31	30	29	29	29	28	26	24
Surface Wind (mph)	16	17	18	20	20	20	20	20	20	18	18	18	17	16	16	15	15	15	16	16	17	18	18	20
Wind Dir	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	S	S	S	S	SSW
Gust	26	29	30	30	30	29	29	28	28	26	26	26	25										26	28
Sky Cover (%)	40	51	62	69	69	72	73	70	75	80	79	78	75	71	64	56	50	46	46	51	59	66	70	72
Precipitation Potential (%)	3	13	22	44	66	69	72	72	72	62	62	62	23	23	23	16	16	16	44	44	44	50	50	50
Relative Humidity (%)	66	64	62	61	59	56	57	58	59	63	62	61	65	69	72	76	80	85	88	88	87	87	90	93
Rain	--	--	SChc	Chc	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	SChc	SChc	SChc	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	Chc
Thunder	--	--	--	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc

English Units Forecast Discussion 7-Day Forecast Hourly Weather Graph Graphical Hazardous Weather Outlook Hazardous Weather Regional Weather Conditions Past Weather Information