Point Forecast: Iona SD  43.54N 99.44W (Elev. 1923 ft)	Last Update: 4:30 am CDT Jun 18, 2025

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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) Grassland Fire Danger Index 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: 4am Wed, Jun 18 20255am Wed, Jun 18 20256am Wed, Jun 18 20257am Wed, Jun 18 20258am Wed, Jun 18 20259am Wed, Jun 18 202510am Wed, Jun 18 202511am Wed, Jun 18 202512pm Wed, Jun 18 20251pm Wed, Jun 18 20252pm Wed, Jun 18 20253pm Wed, Jun 18 20254pm Wed, Jun 18 20255pm Wed, Jun 18 20256pm Wed, Jun 18 20257pm Wed, Jun 18 20258pm Wed, Jun 18 20259pm Wed, Jun 18 202510pm Wed, Jun 18 202511pm Wed, Jun 18 202512am Thu, Jun 19 20251am Thu, Jun 19 20252am Thu, Jun 19 20253am Thu, Jun 19 20254am Thu, Jun 19 20255am Thu, Jun 19 20256am Thu, Jun 19 20257am Thu, Jun 19 20258am Thu, Jun 19 20259am Thu, Jun 19 202510am Thu, Jun 19 202511am Thu, Jun 19 202512pm Thu, Jun 19 20251pm Thu, Jun 19 20252pm Thu, Jun 19 20253pm Thu, Jun 19 20254pm Thu, Jun 19 20255pm Thu, Jun 19 20256pm Thu, Jun 19 20257pm Thu, Jun 19 20258pm Thu, Jun 19 20259pm Thu, Jun 19 202510pm Thu, Jun 19 202511pm Thu, Jun 19 202512am 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 2025

Date	06/18																				06/19
Hour (CDT)	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03
Temperature (°F)	63	63	63	63	62	64	67	69	70	73	75	77	77	78	79	77	76	72	69	67	65	64	63	62
Dewpoint (°F)	58	58	57	58	60	61	61	60	60	59	58	58	57	56	56	55	57	57	57	56	57	57	57	56
Heat Index (°F)											75	77	77	78	79	77	76
Surface Wind (mph)	7	7	8	9	9	9	9	9	10	10	10	10	10	9	8	8	7	6	7	8	9	10	10	11
Wind Dir	WNW	WNW	NW	NW	NW	NW	NW	NNW	NNW	NNW	NNW	NNW	NNW	NW	NW	NNW	NNW	WNW	S	S	S	S	SSW	SSW
Gust
Sky Cover (%)	89	87	79	77	54	35	42	36	41	34	33	32	28	8	11	9	10	9	10	13	11	11	10	10
Precipitation Potential (%)	36	35	30	22	25	23	18	20	14	5	2	6	6	1	3	1	0	0	0	0	0	0	0	0
Relative Humidity (%)	84	84	81	84	93	90	81	73	71	62	56	52	50	47	45	47	52	59	66	68	75	78	81	81
Rain	Chc	Chc	Chc	SChc	Chc	SChc	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	Chc	Chc	Chc	SChc	Chc	SChc	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																					06/20
Hour (CDT)	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03
Temperature (°F)	62	62	61	62	66	70	77	80	85	89	90	92	93	92	92	91	87	83	79	78	77	76	75	75
Dewpoint (°F)	56	56	55	56	58	59	59	59	58	57	57	58	59	60	60	61	61	62	62	62	62	62	61	61
Heat Index (°F)							77	81	84	88	89	91	92	92	92	91	87	84	79	78	77	76	75	75
Surface Wind (mph)	13	13	14	14	14	14	15	16	16	17	18	20	21	21	20	18	17	17	17	17	18	18	18	18
Wind Dir	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S
Gust						22	23	24	25	26	28	29	30	29	28	26	25
Sky Cover (%)	12	11	13	19	8	5	5	6	5	3	3	2	2	9	16	23	20	17	14	16	17	19	19	19
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	6	6	6	6	6	6	14	14	14	14	14	14	5	5	5
Relative Humidity (%)	81	81	81	81	75	68	54	49	40	34	33	32	32	34	34	37	42	49	56	58	60	62	62	62
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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