St. Charles Weather in 2021

Historical record of St. Charles, Missouri weather for the year 2021 based on NOAA data.

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2021 St. Charles Weather Extremes
Highest temperature	98 °F	June 20
Lowest temperature	-5 °F	February 17
Highest daily low	78 °F	August 12
Lowest daily high	5 °F	February 16
Most daily precipitation	2.5 inches	March 18
Most daily snow	6.1 inches	February 16
Total annual precipitation	44.8 inches	-
Total annual snow	14.8 inches	-

What was the hottest temperature in St. Charles in 2021?

The highest temperature recorded in St. Charles, Missouri in 2021 was 98 °F which happened 2 different times.

Highest Temperatures: All-Time By Year

Highest Temperatures in St. Charles in 2021

Rank	Temperature	Date
1	98 °F	Jun 20
1	98 °F	Jun 19
3	97 °F	Aug 26
4	96 °F	Aug 25
4	96 °F	Aug 13
4	96 °F	Aug 12
7	95 °F	Aug 28
7	95 °F	Aug 27
7	95 °F	Jul 30
7	95 °F	Jun 18
7	95 °F	Jun 12

What was the coldest temperature in St. Charles in 2021?

The lowest temperature recorded in St. Charles, Missouri in 2021 was -5 °F which happened 2 different times.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in St. Charles in 2021

Rank	Temperature	Date
1	-5 °F	February 17
1	-5 °F	February 16
3	-2 °F	February 14
4	-1 °F	February 15
5	3 °F	February 13
5	3 °F	February 7
7	4 °F	February 8
8	5 °F	February 19
9	7 °F	February 18
10	10 °F	February 12

January 2021 St. Charles Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
January 1	45	23	0.20	0.0
January 2	35	30	0.32	0.0
January 3	35	30	0.05	0.0
January 4	37	28	0.00	0.0
January 5	38	31	0.00	0.0
January 6	50	30	0.00	0.0
January 7	50	30	0.00	0.0
January 8	n/a	n/a	0.00	0.0
January 9	35	30	0.00	0.0
January 10	32	27	0.00	0.0
January 11	30	25	0.00	0.0
January 12	37	24	0.00	0.0
January 13	54	26	0.00	0.0
January 14	54	36	0.00	0.0
January 15	48	34	0.00	0.0
January 16	n/a	32	0.19	n/a
January 17	36	29	0.00	0.0
January 18	38	29	0.00	0.0
January 19	44	27	0.00	0.0
January 20	42	21	0.00	0.0
January 21	49	22	0.00	0.0
January 22	n/a	n/a	0.00	0.0
January 23	n/a	17	0.00	0.0
January 24	40	18	0.00	0.0
January 25	42	33	0.61	0.0
January 26	n/a	n/a	n/a	0.0
January 27	37	27	0.00	0.0
January 28	30	13	0.23	2.8
January 29	32	13	0.00	0.0
January 30	42	22	0.00	0.0
January 31	44	n/a	1.31	0.0

February 2021 St. Charles Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
February 1	36	32	0.03	0.0
February 2	35	26	0.00	0.0
February 3	39	25	0.00	0.0
February 4	46	26	0.01	0.0
February 5	44	24	0.00	0.0
February 6	43	18	0.00	0.0
February 7	n/a	3	0.01	0.4
February 8	17	4	0.00	0.0
February 9	22	12	0.10	0.7
February 10	22	12	0.01	0.3
February 11	20	12	0.01	0.7
February 12	21	10	0.09	0.9
February 13	n/a	3	0.10	0.6
February 14	11	-2	n/a	0.3
February 15	8	-1	n/a	1.8
February 16	5	-5	n/a	6.1
February 17	17	-5	0.00	0.0
February 18	19	7	0.00	0.2
February 19	27	5	0.00	0.0
February 20	34	n/a	0.00	0.0
February 21	43	21	0.00	0.0
February 22	50	29	0.03	0.0
February 23	56	36	0.00	0.0
February 24	67	36	0.00	0.0
February 25	59	30	0.00	0.0
February 26	48	30	0.00	0.0
February 27	51	32	0.00	0.0
February 28	60	32	0.71	0.0

March 2021 St. Charles Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
March 1	60	28	0.04	0.0
March 2	51	27	0.00	0.0
March 3	59	32	0.00	0.0
March 4	71	33	0.00	0.0
March 5	n/a	30	0.00	0.0
March 6	52	31	0.00	0.0
March 7	59	33	0.00	0.0
March 8	68	34	0.00	0.0
March 9	71	49	0.00	0.0
March 10	74	52	0.00	0.0
March 11	71	56	0.32	0.0
March 12	57	43	0.18	0.0
March 13	58	43	0.10	0.0
March 14	58	47	0.00	0.0
March 15	54	44	0.27	0.0
March 16	49	43	0.11	0.0
March 17	49	42	0.00	0.0
March 18	53	40	2.47	0.0
March 19	45	33	0.72	0.0
March 20	52	28	0.00	n/a
March 21	61	29	0.00	n/a
March 22	70	37	0.00	n/a
March 23	70	n/a	0.00	n/a
March 24	62	45	0.17	n/a
March 25	65	46	0.00	n/a
March 26	55	45	0.57	0.0
March 27	63	45	0.01	0.0
March 28	79	44	0.31	0.0
March 29	57	37	0.00	n/a
March 30	72	41	0.00	n/a
March 31	72	37	0.00	0.0

April 2021 St. Charles Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
April 1	53	29	0.00	0.0
April 2	48	29	0.00	0.0
April 3	59	29	0.00	0.0
April 4	74	41	0.00	0.0
April 5	79	46	0.00	0.0
April 6	82	55	0.00	0.0
April 7	81	59	0.00	0.0
April 8	76	50	1.12	0.0
April 9	55	44	0.05	0.0
April 10	79	44	0.91	0.0
April 11	60	48	0.46	0.0
April 12	68	42	0.00	0.0
April 13	68	42	0.07	0.0
April 14	64	46	0.00	0.0
April 15	62	41	0.00	0.0
April 16	n/a	n/a	0.00	0.0
April 17	60	41	0.02	0.0
April 18	61	43	0.00	0.0
April 19	66	40	0.04	0.0
April 20	70	39	0.00	0.0
April 21	42	31	0.37	n/a
April 22	52	32	0.00	0.0
April 23	57	35	0.02	0.0
April 24	61	45	0.36	0.0
April 25	59	40	0.46	0.0
April 26	66	41	0.00	0.0
April 27	84	55	0.00	0.0
April 28	85	65	0.01	0.0
April 29	73	60	1.26	0.0
April 30	72	48	0.00	0.0

May 2021 St. Charles Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	78	49	0.00
May 2	n/a	n/a	0.00
May 3	72	61	0.24
May 4	85	60	0.08
May 5	62	45	0.15
May 6	69	47	0.00
May 7	62	42	0.04
May 8	73	42	0.00
May 9	60	49	0.43
May 10	51	39	0.07
May 11	62	40	0.00
May 12	59	44	0.00
May 13	64	38	0.00
May 14	67	41	0.00
May 15	72	43	0.00
May 16	64	55	0.00
May 17	73	58	0.64
May 18	73	61	0.53
May 19	71	63	0.58
May 20	78	66	0.00
May 21	n/a	n/a	0.00
May 22	85	66	0.00
May 23	82	61	0.00
May 24	88	62	0.00
May 25	87	68	0.00
May 26	86	66	0.11
May 27	87	66	0.00
May 28	80	64	1.21
May 29	64	48	0.02
May 30	63	42	0.00
May 31	71	49	0.00

June 2021 St. Charles Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	76	56	0.00
June 2	70	61	0.00
June 3	72	60	0.00
June 4	83	59	0.00
June 5	85	65	0.00
June 6	87	69	0.00
June 7	86	71	0.00
June 8	84	67	0.04
June 9	84	67	0.04
June 10	85	69	0.00
June 11	90	69	0.00
June 12	95	n/a	0.00
June 13	93	69	0.00
June 14	90	64	0.00
June 15	93	60	0.00
June 16	88	64	0.00
June 17	88	64	0.00
June 18	95	72	0.00
June 19	98	75	0.00
June 20	98	67	0.95
June 21	91	68	0.13
June 22	74	52	0.00
June 23	79	59	0.00
June 24	84	65	0.00
June 25	85	65	2.38
June 26	89	70	1.03
June 27	88	71	0.05
June 28	87	71	0.25
June 29	86	70	1.32
June 30	90	70	0.00

July 2021 St. Charles Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
July 1	82	70	0.90	n/a
July 2	83	58	0.06	n/a
July 3	80	59	0.00	n/a
July 4	82	63	0.00	n/a
July 5	88	67	0.00	n/a
July 6	89	69	0.00	n/a
July 7	90	71	0.00	n/a
July 8	90	71	0.02	n/a
July 9	n/a	n/a	0.00	n/a
July 10	90	66	1.37	n/a
July 11	82	66	1.31	n/a
July 12	81	68	0.21	n/a
July 13	82	68	0.13	n/a
July 14	81	67	0.00	n/a
July 15	90	70	0.00	n/a
July 16	88	68	0.96	0.0
July 17	87	67	1.20	0.0
July 18	82	65	0.00	0.0
July 19	83	67	0.00	n/a
July 20	88	62	0.00	n/a
July 21	85	66	0.00	n/a
July 22	88	69	0.00	n/a
July 23	89	71	0.00	n/a
July 24	92	73	0.00	n/a
July 25	94	75	0.06	n/a
July 26	90	70	0.18	0.0
July 27	90	67	0.00	0.0
July 28	89	68	0.00	n/a
July 29	n/a	n/a	0.00	0.0
July 30	95	73	1.29	0.0
July 31	n/a	n/a	0.00	0.0

August 2021 St. Charles Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	76	63	0.10
August 2	85	63	0.00
August 3	79	61	0.00
August 4	80	60	0.00
August 5	82	60	0.00
August 6	84	62	0.00
August 7	88	70	0.00
August 8	91	72	0.00
August 9	92	70	0.55
August 10	94	70	0.00
August 11	91	76	0.19
August 12	96	78	0.00
August 13	96	67	1.64
August 14	88	64	0.00
August 15	n/a	63	0.00
August 16	81	62	0.00
August 17	89	64	0.00
August 18	87	63	0.00
August 19	89	67	0.00
August 20	87	67	0.00
August 21	90	73	0.00
August 22	n/a	n/a	0.00
August 23	88	69	0.00
August 24	94	70	0.22
August 25	96	71	0.00
August 26	97	n/a	0.00
August 27	95	71	0.00
August 28	95	71	0.00
August 29	93	73	0.00
August 30	n/a	n/a	0.00
August 31	89	69	0.00

September 2021 St. Charles Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	86	67	1.95
September 2	83	58	0.00
September 3	80	60	0.00
September 4	78	64	0.48
September 5	77	62	0.11
September 6	82	60	0.00
September 7	87	60	0.00
September 8	89	63	0.00
September 9	83	57	0.00
September 10	80	58	0.00
September 11	85	58	0.00
September 12	88	68	0.00
September 13	89	62	0.00
September 14	90	63	0.00
September 15	91	65	0.06
September 16	n/a	57	0.00
September 17	87	58	0.00
September 18	87	66	0.00
September 19	89	67	0.00
September 20	87	67	0.00
September 21	82	64	1.01
September 22	68	54	0.01
September 23	73	48	0.00
September 24	73	48	0.00
September 25	81	n/a	0.00
September 26	76	50	0.00
September 27	86	55	0.05
September 28	90	60	0.00
September 29	90	60	0.00
September 30	88	61	0.00

October 2021 St. Charles Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	86	63	0.00
October 2	83	64	0.00
October 3	79	64	0.22
October 4	76	59	0.23
October 5	77	59	0.00
October 6	73	63	0.11
October 7	78	59	0.04
October 8	76	58	0.00
October 9	83	57	0.00
October 10	85	57	0.00
October 11	88	68	0.00
October 12	76	55	0.90
October 13	80	54	0.00
October 14	82	63	0.00
October 15	n/a	n/a	n/a
October 16	66	45	n/a
October 17	65	40	0.00
October 18	72	40	0.00
October 19	76	43	0.00
October 20	73	48	0.00
October 21	80	49	0.00
October 22	56	49	0.00
October 23	61	46	0.00
October 24	61	46	0.04
October 25	80	49	0.00
October 26	n/a	n/a	0.00
October 27	n/a	38	0.00
October 28	66	48	0.74
October 29	55	49	0.34
October 30	55	49	0.17
October 31	62	42	0.00

November 2021 St. Charles Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	60	36	0.00
November 2	48	37	0.05
November 3	50	30	0.00
November 4	52	29	0.00
November 5	54	30	0.00
November 6	55	30	0.00
November 7	63	31	0.00
November 8	68	37	0.00
November 9	78	44	0.00
November 10	66	49	0.00
November 11	69	49	0.07
November 12	59	43	0.00
November 13	48	35	0.00
November 14	45	35	0.10
November 15	49	30	0.00
November 16	64	30	0.00
November 17	73	36	0.00
November 18	73	36	0.00
November 19	n/a	n/a	0.00
November 20	48	24	0.00
November 21	61	41	0.00
November 22	61	30	0.00
November 23	41	25	0.00
November 24	55	25	0.00
November 25	66	38	0.28
November 26	40	20	0.00
November 27	44	21	0.00
November 28	60	33	0.00
November 29	50	29	0.00
November 30	59	35	0.00

December 2021 St. Charles Weather

Day	High (°F)	Low (°F)	Precip. (inches)
December 1	56	39	0.00
December 2	67	43	0.01
December 3	71	39	0.00
December 4	74	35	0.00
December 5	52	36	0.00
December 6	62	33	0.00
December 7	42	23	0.00
December 8	32	24	0.00
December 9	48	n/a	0.00
December 10	n/a	n/a	0.00
December 11	67	35	0.66
December 12	47	33	0.01
December 13	56	28	0.00
December 14	60	29	0.00
December 15	66	44	0.03
December 16	72	n/a	0.16
December 17	52	29	0.00
December 18	41	32	0.23
December 19	39	22	0.00
December 20	39	21	0.00
December 21	49	25	0.00
December 22	52	25	0.00
December 23	49	25	0.00
December 24	64	25	0.00
December 25	74	51	0.03
December 26	n/a	n/a	0.00
December 27	64	40	0.02
December 28	62	40	0.27
December 29	47	34	1.22
December 30	38	35	0.07
December 31	45	37	0.01

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Weather Station Details

Years	Station	Coordinates
1893–2024	St. Charles Elm Point	location