Boulder Weather in 2018

Historical record of Boulder, Colorado weather for the year 2018 based on NOAA data.

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2018 Boulder Weather Extremes
Highest temperature	98 °F	June 28
Lowest temperature	-6 °F	February 20
Highest daily low	72 °F	June 29
Lowest daily high	15 °F	February 20
Most daily precipitation	1.4 inches	May 3
Most daily snow	12.6 inches	November 11
Total annual precipitation	19.3 inches	-
Total annual snow	72.3 inches	-

What was the hottest temperature in Boulder in 2018?

The highest temperature recorded in Boulder, Colorado in 2018 was 98 °F which happened on June 28.

Highest Temperatures: All-Time By Year

Highest Temperatures in Boulder in 2018

Rank	Temperature	Date
1	98 °F	Jun 28
2	97 °F	Jul 19
2	97 °F	Jul 10
2	97 °F	Jun 27
2	97 °F	Jun 26
6	96 °F	Jul 8
6	96 °F	Jul 7
8	95 °F	Jul 11
8	95 °F	Jun 14
10	94 °F	Sep 13
10	94 °F	Aug 26
10	94 °F	Jul 22
10	94 °F	Jul 20
10	94 °F	Jul 18
10	94 °F	Jul 14
10	94 °F	Jun 10

What was the coldest temperature in Boulder in 2018?

The lowest temperature recorded in Boulder, Colorado in 2018 was -6 °F which happened on Feb 20.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Boulder in 2018

Rank	Temperature	Date
1	-6 °F	February 20
2	-4 °F	February 21
3	0 °F	January 16
4	5 °F	December 29
5	6 °F	February 11
6	7 °F	February 22
7	9 °F	December 31
7	9 °F	February 23
9	10 °F	February 19
9	10 °F	February 10

January 2018 Boulder Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
January 1	30	12	0.00	0.0
January 2	46	12	0.00	0.0
January 3	50	20	0.00	0.0
January 4	52	24	0.00	0.0
January 5	62	25	0.00	0.0
January 6	60	30	0.00	0.0
January 7	55	30	0.00	0.0
January 8	56	25	0.00	0.0
January 9	67	36	0.00	0.0
January 10	59	44	0.01	0.0
January 11	47	20	0.00	0.0
January 12	48	29	0.00	0.0
January 13	52	21	0.00	0.0
January 14	52	22	0.00	0.0
January 15	38	16	0.06	1.7
January 16	36	0	0.00	0.0
January 17	52	14	0.00	0.0
January 18	63	24	0.00	0.0
January 19	69	38	0.00	0.0
January 20	62	31	0.00	0.0
January 21	32	24	0.67	7.1
January 22	48	15	0.00	0.0
January 23	44	19	0.00	0.0
January 24	53	15	0.00	0.0
January 25	53	28	0.00	0.0
January 26	47	28	0.00	0.0
January 27	45	20	0.00	0.0
January 28	50	23	0.00	0.0
January 29	59	23	0.00	0.0
January 30	64	35	0.00	0.0
January 31	59	24	0.00	0.0

February 2018 Boulder Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
February 1	40	22	0.03	0.5
February 2	52	23	0.00	0.0
February 3	58	32	0.00	0.0
February 4	50	15	0.02	0.3
February 5	53	20	0.02	0.0
February 6	49	22	0.00	0.0
February 7	53	24	0.00	0.0
February 8	60	35	0.00	0.0
February 9	56	24	0.00	0.0
February 10	24	10	0.30	4.1
February 11	46	6	0.04	1.6
February 12	32	15	0.00	0.1
February 13	57	12	0.00	0.0
February 14	63	41	0.00	0.0
February 15	50	29	0.00	0.0
February 16	41	14	0.04	0.6
February 17	56	31	0.00	0.0
February 18	66	36	0.00	0.0
February 19	54	10	0.11	3.2
February 20	15	-6	0.34	5.6
February 21	19	-4	0.00	0.0
February 22	30	7	0.00	0.0
February 23	34	9	0.01	0.1
February 24	37	16	0.13	2.4
February 25	40	20	0.00	0.0
February 26	52	22	0.00	0.0
February 27	52	22	0.00	0.0
February 28	48	25	0.00	0.0

March 2018 Boulder Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
March 1	53	20	0.00	0.0
March 2	69	31	0.00	0.0
March 3	68	30	0.00	0.0
March 4	67	31	0.00	0.0
March 5	45	24	0.00	0.0
March 6	51	20	0.00	0.0
March 7	52	17	0.00	0.0
March 8	65	25	0.00	0.0
March 9	64	40	0.00	0.0
March 10	57	39	0.00	0.0
March 11	51	19	0.00	0.0
March 12	56	22	0.00	0.0
March 13	57	23	0.00	0.0
March 14	66	30	0.00	0.0
March 15	65	35	0.00	0.0
March 16	52	31	0.32	0.1
March 17	61	27	0.00	0.0
March 18	54	28	0.25	0.2
March 19	45	27	0.36	0.8
March 20	51	25	0.00	0.0
March 21	60	27	0.00	0.0
March 22	72	38	0.00	0.0
March 23	70	51	0.00	0.0
March 24	64	31	0.00	0.0
March 25	62	31	0.00	0.0
March 26	56	35	0.10	0.0
March 27	47	26	0.61	3.0
March 28	47	29	0.39	1.5
March 29	47	24	0.19	1.2
March 30	63	25	0.01	0.0
March 31	59	31	0.00	0.0

April 2018 Boulder Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
April 1	49	24	0.02	0.1
April 2	74	31	0.00	0.0
April 3	65	30	0.00	0.0
April 4	62	23	0.00	0.0
April 5	65	37	0.00	0.0
April 6	58	24	0.38	4.1
April 7	50	22	0.02	0.1
April 8	62	41	0.00	0.0
April 9	57	33	0.04	0.0
April 10	69	35	0.00	0.0
April 11	76	52	0.00	0.0
April 12	76	40	0.00	0.0
April 13	69	35	0.01	0.0
April 14	57	28	0.00	0.0
April 15	59	28	0.00	0.0
April 16	65	31	0.00	0.0
April 17	69	43	0.00	0.0
April 18	56	28	0.00	0.0
April 19	61	27	0.00	0.0
April 20	58	35	0.03	0.0
April 21	46	32	0.37	0.7
April 22	64	29	0.00	0.0
April 23	71	35	0.00	0.0
April 24	68	33	0.48	1.0
April 25	66	27	0.00	0.0
April 26	66	41	0.00	0.0
April 27	72	34	0.00	0.0
April 28	73	38	0.00	0.0
April 29	81	47	0.00	0.0
April 30	76	43	0.00	0.0

May 2018 Boulder Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	67	45	0.00
May 2	57	42	0.24
May 3	53	38	1.44
May 4	69	37	0.02
May 5	75	47	0.00
May 6	76	43	0.00
May 7	82	46	0.00
May 8	82	47	0.00
May 9	76	46	0.00
May 10	84	45	0.00
May 11	84	49	0.00
May 12	64	51	0.44
May 13	57	49	0.28
May 14	64	49	0.65
May 15	71	41	0.01
May 16	81	44	0.00
May 17	78	42	0.00
May 18	75	48	0.51
May 19	53	44	0.39
May 20	51	41	0.42
May 21	75	40	0.01
May 22	77	47	0.00
May 23	74	46	0.04
May 24	82	48	0.00
May 25	86	48	0.00
May 26	86	50	0.00
May 27	80	54	0.00
May 28	79	52	0.07
May 29	73	49	0.00
May 30	82	45	0.24
May 31	87	50	0.00

June 2018 Boulder Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	87	50	0.00
June 2	79	48	0.00
June 3	77	44	0.00
June 4	90	51	0.00
June 5	91	53	0.00
June 6	84	53	0.00
June 7	90	53	0.00
June 8	91	51	0.00
June 9	91	52	0.00
June 10	94	54	0.00
June 11	91	60	0.00
June 12	82	49	0.00
June 13	90	52	0.00
June 14	95	56	0.00
June 15	89	62	0.02
June 16	84	57	0.26
June 17	73	55	0.42
June 18	73	55	0.52
June 19	73	57	0.44
June 20	76	48	0.00
June 21	81	50	0.00
June 22	86	53	0.01
June 23	85	50	0.00
June 24	85	54	0.02
June 25	82	46	0.00
June 26	97	51	0.00
June 27	97	65	0.00
June 28	98	57	0.00
June 29	90	72	0.00
June 30	79	53	0.13

July 2018 Boulder Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	87	46	0.00
July 2	92	51	0.00
July 3	90	56	0.00
July 4	87	55	0.00
July 5	84	58	0.24
July 6	87	53	0.00
July 7	96	57	0.00
July 8	96	60	0.00
July 9	93	60	0.00
July 10	97	57	0.00
July 11	95	58	0.00
July 12	92	61	0.05
July 13	88	55	0.00
July 14	94	57	0.00
July 15	93	61	0.45
July 16	85	54	0.02
July 17	84	61	0.00
July 18	94	60	0.00
July 19	97	61	0.00
July 20	94	60	0.00
July 21	93	60	0.05
July 22	94	63	0.11
July 23	78	63	0.31
July 24	86	57	0.11
July 25	82	58	0.03
July 26	81	55	0.07
July 27	80	56	0.35
July 28	77	56	0.01
July 29	75	52	0.04
July 30	77	51	0.00
July 31	84	48	0.00

August 2018 Boulder Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	85	52	0.00
August 2	91	53	0.00
August 3	86	65	0.01
August 4	86	63	0.00
August 5	86	61	0.01
August 6	83	57	0.00
August 7	88	54	0.00
August 8	84	53	0.00
August 9	90	55	0.00
August 10	89	55	0.00
August 11	92	53	0.00
August 12	90	52	0.00
August 13	90	51	0.00
August 14	84	55	0.01
August 15	88	54	0.04
August 16	88	54	0.00
August 17	87	57	0.00
August 18	85	56	0.00
August 19	79	51	0.16
August 20	77	47	0.00
August 21	76	51	0.00
August 22	80	55	0.01
August 23	89	56	0.00
August 24	89	56	0.00
August 25	90	60	0.00
August 26	94	56	0.00
August 27	90	64	0.00
August 28	86	49	0.00
August 29	90	46	0.00
August 30	90	56	0.00
August 31	89	59	0.00

September 2018 Boulder Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	81	54	0.00
September 2	80	51	0.00
September 3	80	54	0.00
September 4	83	51	0.00
September 5	76	54	0.96
September 6	73	48	0.05
September 7	78	48	0.00
September 8	81	48	0.00
September 9	87	54	0.00
September 10	88	52	0.00
September 11	91	55	0.00
September 12	91	55	0.00
September 13	94	59	0.00
September 14	92	55	0.00
September 15	93	52	0.00
September 16	91	58	0.00
September 17	92	60	0.00
September 18	90	55	0.00
September 19	83	57	0.00
September 20	83	57	0.01
September 21	77	51	0.00
September 22	86	43	0.00
September 23	88	52	0.00
September 24	82	51	0.00
September 25	71	44	0.00
September 26	72	36	0.00
September 27	80	45	0.00
September 28	64	42	0.00
September 29	84	37	0.00
September 30	73	40	0.00

October 2018 Boulder Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
October 1	67	39	0.00	0.0
October 2	82	48	0.00	0.0
October 3	85	61	0.00	0.0
October 4	74	43	0.03	0.0
October 5	74	41	0.15	0.0
October 6	54	39	0.03	0.0
October 7	51	39	0.05	0.0
October 8	44	37	0.78	0.0
October 9	38	34	0.26	0.0
October 10	38	30	0.33	0.9
October 11	41	31	0.09	0.0
October 12	63	31	0.00	0.0
October 13	66	34	0.00	0.0
October 14	54	20	0.68	8.9
October 15	47	13	0.00	0.0
October 16	58	26	0.00	0.0
October 17	62	31	0.00	0.0
October 18	68	31	0.00	0.0
October 19	69	47	0.00	0.0
October 20	70	34	0.00	0.0
October 21	78	38	0.00	0.0
October 22	72	41	0.00	0.0
October 23	64	42	0.00	0.0
October 24	65	44	0.00	0.0
October 25	69	40	0.00	0.0
October 26	71	39	0.00	0.0
October 27	76	50	0.00	0.0
October 28	78	36	0.00	0.0
October 29	79	50	0.00	0.0
October 30	66	33	0.10	0.1
October 31	49	32	0.18	0.2

November 2018 Boulder Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
November 1	57	31	0.00	0.0
November 2	64	31	0.00	0.0
November 3	58	38	0.13	0.0
November 4	57	27	0.00	0.0
November 5	54	36	0.00	0.0
November 6	52	31	0.00	0.0
November 7	44	23	0.00	0.0
November 8	40	21	0.00	0.0
November 9	42	17	0.00	0.0
November 10	58	28	0.00	0.0
November 11	42	22	0.64	12.6
November 12	30	12	0.06	1.6
November 13	51	11	0.00	0.0
November 14	61	27	0.00	0.0
November 15	64	37	0.00	0.0
November 16	65	29	0.00	0.0
November 17	49	22	0.31	1.7
November 18	47	12	0.05	0.5
November 19	49	24	0.00	0.0
November 20	57	21	0.00	0.0
November 21	62	27	0.00	0.0
November 22	62	29	0.00	0.0
November 23	51	34	0.00	0.0
November 24	58	27	0.00	0.0
November 25	46	20	0.00	0.0
November 26	54	19	0.00	0.0
November 27	58	28	0.00	0.0
November 28	59	44	0.00	0.0
November 29	52	31	0.00	0.0
November 30	36	24	0.00	0.0

December 2018 Boulder Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
December 1	47	22	0.00	0.0
December 2	38	15	0.00	0.0
December 3	34	21	0.16	2.5
December 4	40	13	0.00	0.0
December 5	48	13	0.00	0.0
December 6	32	17	0.04	0.5
December 7	44	16	0.00	0.0
December 8	49	19	0.00	0.0
December 9	47	21	0.00	0.0
December 10	54	18	0.00	0.0
December 11	57	32	0.00	0.0
December 12	55	26	0.00	0.0
December 13	47	19	0.00	0.0
December 14	55	23	0.00	0.0
December 15	56	22	0.00	0.0
December 16	59	28	0.00	0.0
December 17	59	26	0.00	0.0
December 18	57	31	0.00	0.0
December 19	50	35	0.00	0.0
December 20	48	21	0.00	0.0
December 21	63	25	0.00	0.0
December 22	50	25	0.01	0.0
December 23	50	15	0.00	0.0
December 24	50	26	0.00	0.0
December 25	44	22	0.00	0.0
December 26	40	17	0.00	0.1
December 27	34	18	0.00	0.0
December 28	23	13	0.00	0.0
December 29	37	5	0.00	0.0
December 30	50	21	0.00	0.0
December 31	42	9	0.13	2.6

Next Year >

Weather Station Details

Years	Station	Coordinates
1893–2024	Boulder	location