St. Louis Weather in 2021

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

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2021 St. Louis Weather Extremes
Highest temperature	101 °F	June 18
Lowest temperature	-4 °F	February 16
Highest daily low	81 °F	August 25
Lowest daily high	4 °F	February 15
Most daily precipitation	2.6 inches	June 25
Most daily snow	5.7 inches	February 15
Total annual precipitation	42.5 inches	-
Total annual snow	12.6 inches	-

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

The highest temperature recorded in St. Louis, Missouri in 2021 was 101 °F which happened on June 18.

Highest Temperatures: All-Time By Year

Highest Temperatures in St. Louis in 2021

Rank	Temperature	Date
1	101 °F	Jun 18
2	100 °F	Aug 25
3	98 °F	Aug 23
4	97 °F	Aug 24
4	97 °F	Aug 12
4	97 °F	Aug 11
4	97 °F	Jul 29
8	96 °F	Jul 24
8	96 °F	Jun 17
8	96 °F	Jun 14
8	96 °F	Jun 12
8	96 °F	Jun 11

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

The lowest temperature recorded in St. Louis, Missouri in 2021 was -4 °F which happened on Feb 16.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in St. Louis in 2021

Rank	Temperature	Date
1	-4 °F	February 16
2	-1 °F	February 14
3	0 °F	February 15
4	1 °F	February 13
5	3 °F	February 19
6	5 °F	February 7
7	6 °F	February 17
8	8 °F	February 12
9	12 °F	February 18
9	12 °F	January 28

January 2021 St. Louis Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
January 1	36	30	0.78	0.0
January 2	34	32	0.00	0.0
January 3	39	29	0.00	0.0
January 4	38	30	0.00	0.0
January 5	51	29	0.00	0.0
January 6	45	31	0.00	0.0
January 7	39	33	0.00	0.0
January 8	35	33	0.00	0.0
January 9	33	29	0.00	0.0
January 10	30	28	0.00	0.0
January 11	38	26	0.00	0.0
January 12	54	28	0.00	0.0
January 13	55	36	0.00	0.0
January 14	49	36	0.11	0.0
January 15	36	33	0.11	0.4
January 16	37	32	0.00	0.0
January 17	40	31	0.04	0.3
January 18	44	28	0.01	0.0
January 19	42	27	0.00	0.0
January 20	48	22	0.00	0.0
January 21	54	34	0.00	0.0
January 22	37	23	0.00	0.0
January 23	40	18	0.00	0.0
January 24	42	35	0.00	0.0
January 25	38	34	1.21	0.0
January 26	38	30	0.00	0.0
January 27	31	21	0.26	2.3
January 28	32	12	0.00	0.0
January 29	40	20	0.00	0.0
January 30	45	35	1.25	0.0
January 31	47	33	0.05	0.0

February 2021 St. Louis Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
February 1	34	31	0.00	0.0
February 2	40	26	0.00	0.0
February 3	46	24	0.00	0.0
February 4	44	26	0.22	0.0
February 5	45	25	0.00	0.0
February 6	30	14	0.04	0.4
February 7	17	5	0.00	0.0
February 8	23	16	0.10	0.5
February 9	19	13	0.00	0.1
February 10	19	15	0.04	0.2
February 11	22	14	0.03	0.3
February 12	19	8	0.00	0.0
February 13	10	1	0.02	0.8
February 14	8	-1	0.01	0.1
February 15	4	0	0.52	5.7
February 16	16	-4	0.00	0.0
February 17	19	6	0.04	0.5
February 18	25	12	0.00	0.2
February 19	32	3	0.00	0.0
February 20	39	15	0.00	0.0
February 21	49	27	0.01	0.0
February 22	56	36	0.00	0.0
February 23	66	38	0.00	0.0
February 24	58	36	0.00	0.0
February 25	49	31	0.00	0.0
February 26	51	30	0.00	0.0
February 27	60	33	0.17	0.0
February 28	61	38	0.44	0.0

March 2021 St. Louis Weather

Day	High (°F)	Low (°F)	Precip. (inches)
March 1	51	29	0.00
March 2	59	27	0.00
March 3	71	39	0.00
March 4	62	37	0.00
March 5	51	31	0.00
March 6	59	37	0.00
March 7	67	34	0.00
March 8	71	48	0.00
March 9	75	51	0.00
March 10	72	60	0.00
March 11	68	49	0.48
March 12	59	45	0.05
March 13	58	48	0.00
March 14	54	47	0.01
March 15	51	44	0.44
March 16	50	43	0.00
March 17	55	44	0.87
March 18	45	40	2.04
March 19	53	35	0.00
March 20	61	32	0.00
March 21	70	38	0.00
March 22	70	43	0.00
March 23	62	54	0.46
March 24	66	49	0.00
March 25	57	48	0.54
March 26	64	46	0.00
March 27	80	47	0.28
March 28	57	41	0.00
March 29	72	38	0.00
March 30	74	50	0.00
March 31	54	37	0.00

April 2021 St. Louis Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
April 1	48	30	0.00	0.0
April 2	56	29	0.00	0.0
April 3	76	41	0.00	0.0
April 4	80	53	0.00	0.0
April 5	82	58	0.00	0.0
April 6	82	61	0.00	0.0
April 7	77	57	1.01	0.0
April 8	57	51	0.03	0.0
April 9	80	46	0.00	0.0
April 10	63	49	1.06	0.0
April 11	69	50	0.04	0.0
April 12	68	45	0.00	0.0
April 13	65	49	0.07	0.0
April 14	63	46	0.00	0.0
April 15	61	42	0.00	0.0
April 16	60	44	0.01	0.0
April 17	62	48	0.07	0.0
April 18	67	46	0.00	0.0
April 19	72	42	0.00	0.0
April 20	43	33	0.33	0.8
April 21	53	30	0.01	0.0
April 22	58	32	0.00	0.0
April 23	62	46	0.02	0.0
April 24	59	46	0.68	0.0
April 25	67	41	0.00	0.0
April 26	83	50	0.00	0.0
April 27	85	64	0.00	0.0
April 28	73	68	0.46	0.0
April 29	73	57	0.31	0.0
April 30	79	50	0.00	0.0

May 2021 St. Louis Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	86	56	0.00
May 2	73	63	0.01
May 3	86	63	0.12
May 4	67	50	0.08
May 5	69	45	0.00
May 6	69	50	0.01
May 7	75	45	0.00
May 8	61	51	0.00
May 9	59	42	0.17
May 10	63	40	0.00
May 11	61	43	0.00
May 12	65	45	0.00
May 13	68	45	0.00
May 14	73	45	0.00
May 15	66	57	0.00
May 16	76	56	0.02
May 17	75	62	0.50
May 18	73	62	0.46
May 19	80	67	0.00
May 20	86	69	0.00
May 21	87	70	0.00
May 22	85	68	0.00
May 23	89	65	0.00
May 24	88	67	0.00
May 25	88	68	0.16
May 26	88	68	0.00
May 27	84	68	1.29
May 28	67	50	0.04
May 29	64	49	0.00
May 30	72	45	0.00
May 31	77	57	0.00

June 2021 St. Louis Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	72	62	0.00
June 2	73	63	0.03
June 3	85	65	0.00
June 4	88	62	0.00
June 5	89	70	0.00
June 6	86	74	0.00
June 7	87	73	0.00
June 8	80	70	0.10
June 9	86	70	0.00
June 10	92	73	0.00
June 11	96	74	0.00
June 12	96	77	0.00
June 13	93	73	0.00
June 14	96	67	0.00
June 15	91	66	0.00
June 16	90	67	0.00
June 17	96	68	0.00
June 18	101	81	0.00
June 19	92	70	0.36
June 20	93	73	0.00
June 21	75	59	0.21
June 22	82	55	0.00
June 23	87	65	0.00
June 24	82	71	0.01
June 25	91	71	2.62
June 26	92	74	0.06
June 27	91	75	0.24
June 28	88	74	1.59
June 29	93	74	0.00
June 30	83	73	0.11

July 2021 St. Louis Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	85	71	0.65
July 2	83	63	0.00
July 3	84	63	0.00
July 4	90	68	0.00
July 5	91	72	0.00
July 6	92	73	0.00
July 7	93	75	0.02
July 8	87	73	0.00
July 9	88	67	2.02
July 10	82	68	1.28
July 11	83	69	0.01
July 12	86	70	0.11
July 13	82	71	0.00
July 14	92	71	0.00
July 15	90	72	0.22
July 16	82	71	0.76
July 17	85	70	0.00
July 18	85	69	0.00
July 19	86	70	0.00
July 20	86	69	0.00
July 21	89	70	0.00
July 22	90	74	0.00
July 23	93	75	0.00
July 24	96	77	0.00
July 25	90	76	0.64
July 26	91	73	0.00
July 27	92	72	0.00
July 28	95	73	0.00
July 29	97	76	0.18
July 30	87	74	0.00
July 31	79	67	0.06

August 2021 St. Louis Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	86	64	0.00
August 2	82	66	0.00
August 3	82	64	0.00
August 4	85	63	0.00
August 5	87	65	0.00
August 6	89	72	0.00
August 7	93	74	0.00
August 8	93	72	1.01
August 9	95	72	0.60
August 10	94	76	0.39
August 11	97	80	0.00
August 12	97	70	0.91
August 13	90	70	0.00
August 14	84	68	0.00
August 15	83	67	0.00
August 16	85	66	0.00
August 17	88	71	0.00
August 18	90	71	0.00
August 19	89	71	0.00
August 20	92	75	0.00
August 21	90	76	0.00
August 22	90	70	0.00
August 23	98	74	0.52
August 24	97	74	0.00
August 25	100	81	0.00
August 26	95	75	0.08
August 27	95	73	0.00
August 28	94	78	0.00
August 29	95	78	0.00
August 30	90	73	0.12
August 31	86	70	1.22

September 2021 St. Louis Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	84	67	0.00
September 2	81	62	0.00
September 3	79	64	0.01
September 4	79	72	0.88
September 5	83	64	0.00
September 6	88	65	0.00
September 7	92	71	0.00
September 8	85	63	0.00
September 9	82	59	0.00
September 10	86	60	0.00
September 11	89	71	0.00
September 12	91	73	0.00
September 13	91	69	0.00
September 14	93	73	0.24
September 15	83	66	0.12
September 16	85	61	0.00
September 17	89	65	0.00
September 18	91	70	0.00
September 19	88	70	0.03
September 20	88	74	0.00
September 21	79	59	1.70
September 22	73	55	0.00
September 23	74	51	0.00
September 24	82	54	0.00
September 25	77	55	0.06
September 26	86	55	0.00
September 27	92	71	0.00
September 28	91	68	0.00
September 29	88	64	0.00
September 30	87	67	0.00

October 2021 St. Louis Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	84	66	0.00
October 2	80	71	0.14
October 3	75	66	0.32
October 4	79	59	0.00
October 5	75	62	0.00
October 6	79	65	0.02
October 7	78	64	0.00
October 8	83	61	0.00
October 9	87	67	0.00
October 10	88	70	0.00
October 11	77	61	0.44
October 12	79	55	0.00
October 13	84	59	0.02
October 14	77	64	0.82
October 15	66	49	0.10
October 16	66	46	0.00
October 17	73	45	0.00
October 18	77	48	0.00
October 19	73	51	0.00
October 20	81	56	0.05
October 21	67	50	0.00
October 22	61	49	0.00
October 23	58	47	0.02
October 24	81	56	0.00
October 25	61	44	0.00
October 26	62	40	0.00
October 27	66	50	0.00
October 28	56	49	0.59
October 29	56	52	0.10
October 30	61	46	0.00
October 31	60	42	0.00

November 2021 St. Louis Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	49	38	0.01
November 2	51	36	0.00
November 3	53	33	0.00
November 4	53	32	0.00
November 5	55	31	0.00
November 6	63	33	0.00
November 7	69	39	0.00
November 8	76	42	0.00
November 9	67	54	0.00
November 10	69	52	0.00
November 11	60	46	0.07
November 12	50	38	0.00
November 13	42	36	0.00
November 14	50	33	0.09
November 15	64	31	0.00
November 16	73	38	0.00
November 17	72	47	0.00
November 18	49	34	0.00
November 19	47	25	0.00
November 20	63	42	0.00
November 21	62	38	0.00
November 22	42	27	0.00
November 23	54	27	0.00
November 24	67	43	0.01
November 25	57	24	0.17
November 26	44	22	0.00
November 27	60	31	0.00
November 28	50	32	0.00
November 29	59	31	0.00
November 30	57	39	0.00

December 2021 St. Louis Weather

Day	High (°F)	Low (°F)	Precip. (inches)
December 1	67	46	0.01
December 2	72	48	0.00
December 3	76	43	0.00
December 4	54	36	0.00
December 5	62	36	0.01
December 6	53	28	0.00
December 7	32	24	0.00
December 8	50	28	0.00
December 9	68	38	0.00
December 10	68	39	0.92
December 11	65	37	0.00
December 12	56	34	0.00
December 13	60	31	0.00
December 14	68	38	0.05
December 15	71	60	0.00
December 16	71	35	0.31
December 17	40	30	0.21
December 18	39	29	0.09
December 19	40	23	0.00
December 20	50	25	0.00
December 21	52	27	0.00
December 22	44	26	0.00
December 23	65	31	0.00
December 24	73	45	0.00
December 25	67	43	0.00
December 26	58	42	0.01
December 27	64	44	0.00
December 28	47	39	1.08
December 29	44	35	0.05
December 30	50	37	0.01
December 31	68	41	0.00

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Weather Station Details

Years	Station	Coordinates
1939–2024	St. Louis International Airport	location
1893–1938	St. Louis	location