Waterloo Weather in 2021

Historical record of Waterloo, Iowa weather for the year 2021 based on NOAA data.

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2021 Waterloo Weather Extremes
Highest temperature	100 °F	June 17
Lowest temperature	-21 °F	February 9
Highest daily low	75 °F	July 28
Lowest daily high	-6 °F	February 14
Most daily precipitation	1.8 inches	August 24
Most daily snow	5.2 inches	January 26
Total annual precipitation	24.9 inches	-
Total annual snow	42.8 inches	-

What was the hottest temperature in Waterloo in 2021?

The highest temperature recorded in Waterloo, Iowa in 2021 was 100 °F which happened on June 17.

Highest Temperatures: All-Time By Year

Highest Temperatures in Waterloo in 2021

Rank	Temperature	Date
1	100 °F	Jun 17
2	97 °F	Jun 10
3	96 °F	Jun 13
4	95 °F	Aug 24
4	95 °F	Jul 5
4	95 °F	Jun 18
7	94 °F	Jul 28
7	94 °F	Jul 27
7	94 °F	Jul 25
7	94 °F	Jul 24
7	94 °F	Jun 11
7	94 °F	Jun 9

What was the coldest temperature in Waterloo in 2021?

The lowest temperature recorded in Waterloo, Iowa in 2021 was -21 °F which happened on Feb 9.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Waterloo in 2021

Rank	Temperature	Date
1	-21 °F	February 9
2	-19 °F	February 16
3	-18 °F	February 17
3	-18 °F	February 15
3	-18 °F	February 7
6	-14 °F	February 20
6	-14 °F	February 8
8	-13 °F	January 28
9	-11 °F	February 18
9	-11 °F	February 14
9	-11 °F	February 12

January 2021 Waterloo Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
January 1	25	12	0.00	0.0
January 2	24	3	0.00	0.0
January 3	23	15	0.00	0.0
January 4	37	20	0.00	0.0
January 5	32	3	0.00	0.0
January 6	30	21	0.00	0.0
January 7	33	24	0.00	0.0
January 8	28	24	0.00	0.0
January 9	26	21	0.00	0.0
January 10	29	20	0.00	0.0
January 11	37	23	0.00	0.0
January 12	38	13	0.00	0.0
January 13	40	23	0.00	0.0
January 14	37	25	0.36	2.2
January 15	35	31	0.14	2.9
January 16	35	25	0.03	0.4
January 17	28	19	0.04	0.5
January 18	27	16	0.00	0.0
January 19	35	8	0.00	0.0
January 20	40	-1	0.00	0.0
January 21	38	15	0.00	0.0
January 22	19	-1	0.00	0.0
January 23	22	-3	0.10	1.1
January 24	28	5	0.04	1.0
January 25	23	7	0.19	3.9
January 26	21	2	0.22	5.2
January 27	22	-6	0.00	0.0
January 28	20	-13	0.00	0.0
January 29	26	16	0.00	0.0
January 30	31	26	0.10	1.2
January 31	32	29	0.19	3.3

February 2021 Waterloo Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
February 1	30	22	0.00	0.0
February 2	23	20	0.00	0.0
February 3	32	19	0.00	0.0
February 4	35	12	0.37	4.8
February 5	13	4	0.00	0.0
February 6	7	-10	0.00	0.1
February 7	0	-18	0.02	0.4
February 8	4	-14	0.02	0.3
February 9	9	-21	0.00	0.0
February 10	11	-8	0.00	0.0
February 11	1	-7	0.17	2.2
February 12	-3	-11	0.00	0.0
February 13	0	-10	0.08	2.5
February 14	-6	-11	0.00	0.0
February 15	-2	-18	0.00	0.0
February 16	10	-19	0.00	0.0
February 17	12	-18	0.01	0.1
February 18	18	-11	0.01	0.2
February 19	20	-9	0.00	0.0
February 20	25	-14	0.00	0.0
February 21	26	19	0.33	3.5
February 22	41	23	0.00	0.0
February 23	44	27	0.00	0.0
February 24	39	23	0.00	0.0
February 25	40	15	0.01	0.0
February 26	37	14	0.00	0.0
February 27	44	22	0.00	0.0
February 28	39	22	0.00	0.0

March 2021 Waterloo Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
March 1	29	12	0.00	0.0
March 2	42	12	0.00	0.0
March 3	48	23	0.00	0.0
March 4	39	22	0.00	0.0
March 5	41	25	0.00	0.0
March 6	47	30	0.00	0.0
March 7	59	31	0.00	0.0
March 8	63	33	0.00	0.0
March 9	69	42	0.00	0.0
March 10	69	37	0.35	0.0
March 11	54	27	0.00	0.0
March 12	50	24	0.00	0.0
March 13	60	23	0.00	0.0
March 14	47	36	0.00	0.0
March 15	36	31	0.59	3.3
March 16	34	30	0.00	0.0
March 17	39	33	0.00	0.0
March 18	52	29	0.00	0.0
March 19	53	19	0.00	0.0
March 20	60	29	0.00	0.0
March 21	66	41	0.00	0.0
March 22	56	43	0.09	0.0
March 23	54	42	0.63	0.0
March 24	50	40	0.04	0.0
March 25	45	40	0.23	0.0
March 26	49	38	0.00	0.0
March 27	55	37	0.07	0.0
March 28	47	33	0.00	0.0
March 29	73	38	0.00	0.0
March 30	57	31	0.00	0.0
March 31	37	23	0.00	0.0

April 2021 Waterloo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
April 1	45	15	0.00
April 2	59	31	0.00
April 3	76	38	0.00
April 4	82	33	0.00
April 5	80	58	0.02
April 6	80	60	0.00
April 7	79	58	0.21
April 8	59	48	0.06
April 9	56	48	0.06
April 10	48	44	0.05
April 11	62	40	0.00
April 12	59	41	0.00
April 13	51	32	0.00
April 14	51	31	0.00
April 15	51	37	0.00
April 16	60	40	0.00
April 17	63	36	0.00
April 18	65	42	0.00
April 19	49	28	0.00
April 20	45	25	0.00
April 21	49	20	0.00
April 22	63	31	0.00
April 23	55	45	0.00
April 24	57	28	0.00
April 25	51	24	0.06
April 26	83	42	0.00
April 27	83	56	0.00
April 28	71	47	0.00
April 29	76	45	0.00
April 30	71	46	0.00

May 2021 Waterloo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	93	56	0.00
May 2	87	60	0.00
May 3	69	50	0.20
May 4	64	38	0.00
May 5	68	33	0.00
May 6	64	42	0.03
May 7	63	39	0.00
May 8	56	31	0.91
May 9	64	40	0.03
May 10	62	39	0.00
May 11	62	35	0.00
May 12	67	33	0.00
May 13	68	37	0.00
May 14	69	40	0.00
May 15	72	53	0.11
May 16	68	54	0.00
May 17	72	51	0.00
May 18	65	58	0.41
May 19	77	64	0.27
May 20	75	65	0.46
May 21	79	67	0.11
May 22	78	66	0.00
May 23	83	66	0.00
May 24	85	66	0.00
May 25	84	63	0.05
May 26	77	56	0.00
May 27	60	43	0.87
May 28	51	39	0.03
May 29	65	35	0.00
May 30	65	42	0.00
May 31	76	47	0.00

June 2021 Waterloo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	79	53	0.00
June 2	83	51	0.00
June 3	89	59	0.00
June 4	91	66	0.00
June 5	93	66	0.00
June 6	89	67	0.00
June 7	92	67	0.00
June 8	91	65	0.00
June 9	94	66	0.00
June 10	97	74	0.00
June 11	94	69	0.00
June 12	90	61	0.00
June 13	96	54	0.00
June 14	90	60	0.00
June 15	89	56	0.00
June 16	89	55	0.00
June 17	100	69	0.00
June 18	95	67	0.00
June 19	89	59	0.00
June 20	82	60	0.67
June 21	71	50	0.00
June 22	81	46	0.07
June 23	86	63	0.03
June 24	89	70	0.00
June 25	87	70	0.00
June 26	82	69	0.09
June 27	84	66	0.00
June 28	86	69	0.00
June 29	84	69	0.01
June 30	88	63	0.00

July 2021 Waterloo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	89	61	0.00
July 2	87	59	0.00
July 3	89	54	0.00
July 4	93	69	0.00
July 5	95	73	0.00
July 6	93	75	0.00
July 7	76	63	0.11
July 8	77	63	0.00
July 9	83	64	0.03
July 10	76	63	0.00
July 11	84	58	0.00
July 12	82	55	0.00
July 13	86	61	0.00
July 14	84	66	1.05
July 15	82	62	0.00
July 16	84	60	0.00
July 17	86	61	0.00
July 18	85	58	0.00
July 19	87	59	0.00
July 20	89	59	0.00
July 21	91	66	0.00
July 22	90	68	0.00
July 23	93	70	0.00
July 24	94	69	0.00
July 25	94	61	0.00
July 26	92	60	0.00
July 27	94	65	0.00
July 28	94	75	0.00
July 29	93	65	0.00
July 30	75	62	0.04
July 31	85	65	0.00

August 2021 Waterloo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	83	57	0.00
August 2	82	52	0.00
August 3	83	52	0.00
August 4	86	53	0.00
August 5	78	64	0.40
August 6	88	65	0.00
August 7	89	73	0.00
August 8	84	68	0.31
August 9	86	70	0.32
August 10	91	74	0.00
August 11	92	66	0.00
August 12	92	62	0.00
August 13	86	58	0.00
August 14	84	48	0.00
August 15	85	52	0.00
August 16	84	54	0.00
August 17	88	55	0.00
August 18	91	62	0.00
August 19	92	63	0.00
August 20	92	66	0.76
August 21	81	59	0.44
August 22	80	54	0.00
August 23	87	66	1.12
August 24	95	67	1.80
August 25	88	69	0.00
August 26	80	68	0.50
August 27	90	68	0.51
August 28	90	72	0.43
August 29	83	62	0.07
August 30	84	58	0.00
August 31	77	62	0.03

September 2021 Waterloo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	78	57	0.00
September 2	76	57	0.00
September 3	70	63	0.52
September 4	76	57	0.00
September 5	83	52	0.00
September 6	84	52	0.00
September 7	82	57	0.00
September 8	77	53	0.00
September 9	78	50	0.00
September 10	82	49	0.00
September 11	88	56	0.00
September 12	77	65	0.00
September 13	86	64	0.44
September 14	74	57	0.01
September 15	79	49	0.00
September 16	85	57	0.00
September 17	77	52	0.00
September 18	82	47	0.00
September 19	90	64	0.00
September 20	84	59	0.28
September 21	73	50	0.00
September 22	72	45	0.00
September 23	74	41	0.00
September 24	75	45	0.06
September 25	76	39	0.00
September 26	88	56	0.00
September 27	89	50	0.00
September 28	84	52	0.00
September 29	88	55	0.00
September 30	88	60	0.00

October 2021 Waterloo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	85	57	0.09
October 2	75	64	0.00
October 3	79	56	0.01
October 4	75	52	0.00
October 5	72	51	0.00
October 6	78	61	0.02
October 7	71	65	0.26
October 8	81	63	0.48
October 9	81	58	0.00
October 10	74	59	0.00
October 11	61	52	0.39
October 12	71	49	0.00
October 13	74	51	0.42
October 14	67	44	0.00
October 15	62	39	0.00
October 16	64	37	0.00
October 17	71	35	0.00
October 18	76	38	0.00
October 19	76	47	0.00
October 20	69	46	0.02
October 21	52	34	0.10
October 22	51	31	0.00
October 23	56	26	0.00
October 24	46	39	1.41
October 25	56	36	0.08
October 26	59	32	0.00
October 27	57	48	0.10
October 28	51	46	0.34
October 29	55	42	0.00
October 30	61	37	0.00
October 31	53	31	0.00

November 2021 Waterloo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	48	27	0.00
November 2	47	24	0.00
November 3	47	19	0.00
November 4	56	37	0.00
November 5	58	36	0.00
November 6	66	38	0.00
November 7	69	41	0.00
November 8	66	36	0.00
November 9	64	33	0.00
November 10	54	32	0.88
November 11	54	35	0.40
November 12	37	33	0.07
November 13	37	33	0.01
November 14	41	30	0.00
November 15	43	26	0.00
November 16	54	29	0.00
November 17	50	30	0.00
November 18	35	19	0.00
November 19	41	15	0.00
November 20	54	35	0.00
November 21	50	25	0.00
November 22	36	16	0.00
November 23	54	23	0.00
November 24	59	35	0.00
November 25	35	14	0.00
November 26	38	14	0.00
November 27	58	30	0.00
November 28	44	23	0.00
November 29	63	29	0.00
November 30	54	30	0.00

December 2021 Waterloo Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
December 1	56	40	0.05	0.0
December 2	56	35	0.00	0.0
December 3	54	29	0.00	0.0
December 4	39	26	0.00	0.0
December 5	41	32	0.00	0.0
December 6	32	5	0.00	0.0
December 7	32	5	0.00	0.0
December 8	31	13	0.00	0.0
December 9	50	29	0.02	0.0
December 10	39	31	0.09	0.0
December 11	33	24	0.12	1.4
December 12	49	29	0.00	0.0
December 13	51	28	0.00	0.0
December 14	51	29	0.00	0.0
December 15	74	40	0.41	0.0
December 16	40	23	0.00	0.0
December 17	36	17	0.00	0.0
December 18	32	18	0.00	0.0
December 19	30	21	0.00	0.0
December 20	38	14	0.00	0.0
December 21	37	12	0.00	0.0
December 22	34	12	0.00	0.0
December 23	45	26	0.00	0.0
December 24	53	35	0.00	0.0
December 25	47	20	0.00	0.0
December 26	43	16	0.24	0.0
December 27	37	24	0.01	0.0
December 28	33	14	0.37	2.2
December 29	17	0	0.01	0.1
December 30	29	17	0.00	0.0
December 31	30	12	0.00	0.0

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Weather Station Details

Years	Station	Coordinates
1950–2024	Waterloo Municipal Airport	location
1895–1950	Waterloo	location