Point Forecast: St. Charles County Smartt Airport MO  38.94N 90.45W (Elev. 130 m)	Last Update: 3:21 am CDT Aug 17, 2026

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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 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: 3am Mon, Aug 17 20264am Mon, Aug 17 20265am Mon, Aug 17 20266am Mon, Aug 17 20267am Mon, Aug 17 20268am Mon, Aug 17 20269am Mon, Aug 17 202610am Mon, Aug 17 202611am Mon, Aug 17 202612pm Mon, Aug 17 20261pm Mon, Aug 17 20262pm Mon, Aug 17 20263pm Mon, Aug 17 20264pm Mon, Aug 17 20265pm Mon, Aug 17 20266pm Mon, Aug 17 20267pm Mon, Aug 17 20268pm Mon, Aug 17 20269pm Mon, Aug 17 202610pm Mon, Aug 17 202611pm Mon, Aug 17 202612am Tue, Aug 18 20261am Tue, Aug 18 20262am Tue, Aug 18 20263am Tue, Aug 18 20264am Tue, Aug 18 20265am Tue, Aug 18 20266am Tue, Aug 18 20267am Tue, Aug 18 20268am Tue, Aug 18 20269am Tue, Aug 18 202610am Tue, Aug 18 202611am Tue, Aug 18 202612pm Tue, Aug 18 20261pm Tue, Aug 18 20262pm Tue, Aug 18 20263pm Tue, Aug 18 20264pm Tue, Aug 18 20265pm Tue, Aug 18 20266pm Tue, Aug 18 20267pm Tue, Aug 18 20268pm Tue, Aug 18 20269pm Tue, Aug 18 202610pm Tue, Aug 18 202611pm Tue, Aug 18 202612am Wed, Aug 19 20261am Wed, Aug 19 20262am Wed, Aug 19 20263am Wed, Aug 19 20264am Wed, Aug 19 20265am Wed, Aug 19 20266am Wed, Aug 19 20267am Wed, Aug 19 20268am Wed, Aug 19 20269am Wed, Aug 19 202610am Wed, Aug 19 202611am Wed, Aug 19 202612pm Wed, Aug 19 20261pm Wed, Aug 19 20262pm Wed, Aug 19 20263pm Wed, Aug 19 20264pm Wed, Aug 19 20265pm Wed, Aug 19 20266pm Wed, Aug 19 20267pm Wed, Aug 19 20268pm Wed, Aug 19 20269pm Wed, Aug 19 202610pm Wed, Aug 19 202611pm Wed, Aug 19 202612am Thu, Aug 20 20261am Thu, Aug 20 20262am Thu, Aug 20 20263am Thu, Aug 20 20264am Thu, Aug 20 20265am Thu, Aug 20 20266am Thu, Aug 20 20267am Thu, Aug 20 20268am Thu, Aug 20 20269am Thu, Aug 20 202610am Thu, Aug 20 202611am Thu, Aug 20 202612pm Thu, Aug 20 20261pm Thu, Aug 20 20262pm Thu, Aug 20 20263pm Thu, Aug 20 20264pm Thu, Aug 20 20265pm Thu, Aug 20 20266pm Thu, Aug 20 20267pm Thu, Aug 20 20268pm Thu, Aug 20 20269pm Thu, Aug 20 202610pm Thu, Aug 20 202611pm Thu, Aug 20 202612am Fri, Aug 21 20261am Fri, Aug 21 20262am Fri, Aug 21 20263am Fri, Aug 21 20264am Fri, Aug 21 20265am Fri, Aug 21 20266am Fri, Aug 21 20267am Fri, Aug 21 20268am Fri, Aug 21 20269am Fri, Aug 21 202610am Fri, Aug 21 202611am Fri, Aug 21 202612pm Fri, Aug 21 20261pm Fri, Aug 21 20262pm Fri, Aug 21 2026

Date	08/17																					08/18
Hour (CDT)	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02
Temperature (°C)	23	23	22	22	22	23	24	24	26	27	28	28	29	28	28	28	27	25	23	22	21	21	21	19
Dewpoint (°C)	22	22	22	21	21	21	21	20	19	19	19	18	18	18	18	19	19	19	19	19	19	19	19	19
Heat Index (°C)							24	24	26	28	29	29	30	29	29	28	28	25
Surface Wind (mph)	5	5	6	6	7	8	8	8	8	9	9	9	9	9	8	7	6	5	3	3	2	2	1	1
Wind Dir	NW	NW	NW	NW	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	NE	NE	NE	N	NW
Gust
Sky Cover (%)	20	21	22	23	24	18	13	7	7	8	8	25	41	58	56	55	53	47	41	35	36	37	38	41
Precipitation Potential (%)	5	4	3	2	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	97	93	97	93	93	87	82	76	69	62	57	55	53	55	56	60	63	71	79	87	90	90	90	97
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																						08/19
Hour (CDT)	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02
Temperature (°C)	19	19	19	18	19	21	23	26	27	28	29	30	31	31	31	30	29	28	26	25	24	24	23	23
Dewpoint (°C)	19	18	18	18	19	19	19	19	19	19	19	19	19	19	20	20	21	21	21	21	21	20	20	20
Heat Index (°C)								26	28	29	31	32	32	32	33	32	31	30	26	25	24	24
Surface Wind (mph)	2	2	2	2	2	2	3	6	6	6	6	5	5	5	5	5	5	5	5	6	6	6	6	6
Wind Dir	SW	W	S	SW	S	SW	SW	SW	SW	SW	SW	SW	SW	SW	S	S	S	SE	SE	SE	SE	SE	SE	SE
Gust
Sky Cover (%)	43	45	37	28	20	15	10	5	8	11	13	11	8	6	5	7	9	27	33	38	38	39	39	50
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	3	6	3	3	3	3	3	3	72	72
Relative Humidity (%)	97	97	97	100	100	90	79	69	62	58	53	53	52	52	53	55	63	67	74	76	82	79	82	84
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	Lkly	Lkly
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	Lkly	Lkly

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