San Luis Obispo Weather in 2021

Historical record of San Luis Obispo, California weather for the year 2021 based on NOAA data.

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2021 San Luis Obispo Weather Extremes
Highest temperature	109 °F	June 16
Lowest temperature	31 °F	January 26
Highest daily low	62 °F	July 9
Lowest daily high	53 °F	January 28
Most daily precipitation	3.7 inches	January 28
Total annual precipitation	15.3 inches	-

What was the hottest temperature in San Luis Obispo in 2021?

The highest temperature recorded in San Luis Obispo, California in 2021 was 109 °F which happened on June 16.

Highest Temperatures: All-Time By Year

Highest Temperatures in San Luis Obispo in 2021

Rank	Temperature	Date
1	109 °F	Jun 16
2	96 °F	Sep 30
3	95 °F	Jun 15
4	94 °F	Oct 28
5	92 °F	Jun 17
6	91 °F	Sep 20
6	91 °F	Jan 15
8	90 °F	Nov 13
8	90 °F	Nov 12
8	90 °F	Oct 15
8	90 °F	Jul 9
8	90 °F	Jun 12

What was the coldest temperature in San Luis Obispo in 2021?

The lowest temperature recorded in San Luis Obispo, California in 2021 was 31 °F which happened on Jan 26.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in San Luis Obispo in 2021

Rank	Temperature	Date
1	31 °F	January 26
2	32 °F	December 19
3	33 °F	December 12
4	34 °F	December 18
4	34 °F	December 15
4	34 °F	March 16
4	34 °F	March 4
8	35 °F	December 11
8	35 °F	March 2
8	35 °F	March 1
8	35 °F	January 24

January 2021 San Luis Obispo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
January 1	67	38	0.00
January 2	65	40	0.00
January 3	71	47	0.00
January 4	63	41	0.00
January 5	71	46	0.00
January 6	65	39	0.00
January 7	73	44	0.00
January 8	70	39	0.00
January 9	69	43	0.00
January 10	72	40	0.00
January 11	71	40	0.00
January 12	67	38	0.00
January 13	80	44	0.00
January 14	81	55	0.00
January 15	91	45	0.00
January 16	83	57	0.00
January 17	86	50	0.00
January 18	81	43	0.00
January 19	71	47	0.00
January 20	76	53	0.00
January 21	73	41	0.00
January 22	56	41	0.12
January 23	59	40	0.03
January 24	58	35	0.19
January 25	55	38	0.00
January 26	55	31	0.09
January 27	53	47	1.67
January 28	53	48	3.66
January 29	56	42	0.54
January 30	58	36	0.00
January 31	66	37	0.00

February 2021 San Luis Obispo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
February 1	64	44	0.00
February 2	65	40	0.00
February 3	67	50	0.00
February 4	68	46	0.00
February 5	73	41	0.00
February 6	76	46	0.00
February 7	77	38	0.00
February 8	58	43	0.00
February 9	57	49	0.00
February 10	67	45	0.00
February 11	68	45	0.00
February 12	65	49	0.14
February 13	60	46	0.00
February 14	64	45	0.00
February 15	65	47	0.00
February 16	64	47	0.00
February 17	67	47	0.00
February 18	69	37	0.00
February 19	69	36	0.00
February 20	63	46	0.00
February 21	71	46	0.00
February 22	79	41	0.00
February 23	81	43	0.00
February 24	75	45	0.00
February 25	74	47	0.00
February 26	73	42	0.00
February 27	68	47	0.00
February 28	68	40	0.00

March 2021 San Luis Obispo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
March 1	70	35	0.00
March 2	69	35	0.00
March 3	59	40	0.00
March 4	66	34	0.00
March 5	64	36	0.00
March 6	67	47	0.00
March 7	66	45	0.00
March 8	59	41	0.00
March 9	60	38	0.28
March 10	55	43	0.33
March 11	55	39	0.13
March 12	59	38	0.00
March 13	57	50	0.00
March 14	58	48	0.01
March 15	55	37	0.04
March 16	59	34	0.00
March 17	60	37	0.00
March 18	65	43	0.00
March 19	67	51	0.03
March 20	64	45	0.00
March 21	62	45	0.00
March 22	64	42	0.00
March 23	63	43	0.00
March 24	70	37	0.00
March 25	59	48	0.00
March 26	66	39	0.00
March 27	75	39	0.00
March 28	78	40	0.00
March 29	71	45	0.00
March 30	81	40	0.00
March 31	84	45	0.00

April 2021 San Luis Obispo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
April 1	86	43	0.00
April 2	68	48	0.00
April 3	61	47	0.00
April 4	67	41	0.00
April 5	63	45	0.00
April 6	68	45	0.00
April 7	68	46	0.00
April 8	65	43	0.00
April 9	69	43	0.00
April 10	69	46	0.00
April 11	70	47	0.00
April 12	64	48	0.00
April 13	60	49	0.00
April 14	62	44	0.00
April 15	65	40	0.00
April 16	65	45	0.00
April 17	65	47	0.00
April 18	80	45	0.00
April 19	64	45	0.00
April 20	65	44	0.00
April 21	57	50	0.00
April 22	59	49	0.00
April 23	59	49	0.00
April 24	62	49	0.00
April 25	59	47	0.01
April 26	63	46	0.00
April 27	67	41	0.00
April 28	80	43	0.00
April 29	87	46	0.00
April 30	76	44	0.00

May 2021 San Luis Obispo Weather

Day	High (°F)	Low (°F)
May 1	69	50
May 2	72	49
May 3	78	45
May 4	80	48
May 5	76	48
May 6	67	48
May 7	70	47
May 8	83	43
May 9	78	47
May 10	70	48
May 11	70	49
May 12	73	51
May 13	68	51
May 14	66	50
May 15	62	51
May 16	63	52
May 17	68	53
May 18	73	51
May 19	66	49
May 20	66	43
May 21	63	43
May 22	66	42
May 23	67	50
May 24	77	48
May 25	80	50
May 26	69	48
May 27	73	51
May 28	67	46
May 29	68	52
May 30	74	52
May 31	70	50

June 2021 San Luis Obispo Weather

Day	High (°F)	Low (°F)
June 1	75	52
June 2	75	52
June 3	73	52
June 4	72	53
June 5	72	54
June 6	65	54
June 7	69	55
June 8	70	50
June 9	71	48
June 10	72	47
June 11	74	52
June 12	90	55
June 13	74	53
June 14	77	54
June 15	95	54
June 16	109	62
June 17	92	60
June 18	82	56
June 19	79	54
June 20	78	55
June 21	71	57
June 22	77	58
June 23	76	58
June 24	76	59
June 25	74	58
June 26	74	57
June 27	75	56
June 28	79	55
June 29	83	57
June 30	79	58

July 2021 San Luis Obispo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	77	59	0.00
July 2	78	58	0.00
July 3	77	57	0.00
July 4	75	56	0.00
July 5	77	57	0.00
July 6	76	56	0.00
July 7	74	55	0.00
July 8	86	54	0.00
July 9	90	62	0.00
July 10	85	58	0.00
July 11	86	58	0.00
July 12	82	57	0.00
July 13	77	57	0.00
July 14	75	57	0.00
July 15	77	57	0.00
July 16	77	55	0.00
July 17	80	56	0.00
July 18	84	57	0.00
July 19	87	57	0.00
July 20	82	57	0.00
July 21	78	54	0.00
July 22	79	54	0.00
July 23	80	55	0.00
July 24	78	55	0.00
July 25	77	57	0.00
July 26	73	56	0.01
July 27	80	59	0.00
July 28	78	58	0.00
July 29	78	57	0.00
July 30	82	57	0.00
July 31	81	57	0.00

August 2021 San Luis Obispo Weather

Day	High (°F)	Low (°F)
August 1	79	53
August 2	80	53
August 3	78	58
August 4	75	57
August 5	77	55
August 6	80	54
August 7	80	55
August 8	80	55
August 9	78	55
August 10	82	56
August 11	85	56
August 12	85	59
August 13	87	60
August 14	86	59
August 15	79	58
August 16	84	58
August 17	79	56
August 18	70	59
August 19	80	61
August 20	75	58
August 21	75	60
August 22	77	55
August 23	75	57
August 24	78	58
August 25	79	54
August 26	80	57
August 27	85	55
August 28	83	53
August 29	82	57
August 30	80	58
August 31	74	60

September 2021 San Luis Obispo Weather

Day	High (°F)	Low (°F)
September 1	78	56
September 2	78	56
September 3	78	53
September 4	79	56
September 5	86	57
September 6	86	58
September 7	85	59
September 8	86	58
September 9	88	59
September 10	83	57
September 11	81	57
September 12	78	57
September 13	81	55
September 14	75	56
September 15	72	55
September 16	70	53
September 17	68	54
September 18	73	58
September 19	85	57
September 20	91	61
September 21	83	56
September 22	83	53
September 23	79	55
September 24	73	56
September 25	74	55
September 26	70	57
September 27	74	59
September 28	78	55
September 29	79	50
September 30	96	50

October 2021 San Luis Obispo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	87	49	0.00
October 2	83	45	0.00
October 3	88	47	0.00
October 4	84	51	0.00
October 5	83	54	0.00
October 6	72	54	0.00
October 7	72	54	0.00
October 8	68	53	0.00
October 9	78	50	0.00
October 10	84	48	0.00
October 11	72	50	0.00
October 12	70	43	0.00
October 13	73	43	0.00
October 14	82	47	0.00
October 15	90	48	0.00
October 16	89	48	0.00
October 17	70	45	0.01
October 18	67	47	0.00
October 19	68	43	0.00
October 20	74	43	0.00
October 21	75	53	0.00
October 22	72	56	0.00
October 23	70	50	0.00
October 24	66	51	0.03
October 25	65	52	1.66
October 26	71	48	0.00
October 27	80	52	0.00
October 28	94	56	0.00
October 29	85	52	0.00
October 30	70	54	0.00
October 31	69	52	0.00

November 2021 San Luis Obispo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	68	52	0.00
November 2	74	52	0.00
November 3	84	54	0.00
November 4	77	53	0.00
November 5	82	50	0.00
November 6	74	45	0.00
November 7	73	54	0.00
November 8	73	46	0.00
November 9	64	52	0.16
November 10	75	53	0.00
November 11	81	57	0.00
November 12	90	54	0.00
November 13	90	53	0.00
November 14	88	51	0.00
November 15	84	46	0.00
November 16	78	50	0.00
November 17	68	47	0.00
November 18	65	43	0.00
November 19	68	53	0.00
November 20	75	48	0.00
November 21	85	49	0.00
November 22	85	45	0.00
November 23	79	44	0.00
November 24	75	45	0.00
November 25	78	38	0.00
November 26	78	38	0.00
November 27	82	42	0.00
November 28	82	43	0.00
November 29	85	41	0.00
November 30	89	45	0.00

December 2021 San Luis Obispo Weather

Day	High (°F)	Low (°F)	Precip. (inches)
December 1	88	45	0.00
December 2	67	40	0.00
December 3	59	49	0.00
December 4	64	45	0.00
December 5	76	45	0.00
December 6	69	44	0.00
December 7	67	50	0.00
December 8	65	43	0.00
December 9	60	43	0.05
December 10	65	42	0.00
December 11	65	35	0.00
December 12	63	33	0.00
December 13	58	47	1.78
December 14	58	39	0.64
December 15	58	34	0.00
December 16	59	45	0.05
December 17	62	38	0.00
December 18	65	34	0.00
December 19	58	32	0.00
December 20	56	42	0.00
December 21	64	37	0.00
December 22	60	43	0.40
December 23	59	57	1.49
December 24	60	47	0.34
December 25	57	46	0.63
December 26	57	40	0.01
December 27	56	39	0.37
December 28	56	40	0.00
December 29	56	46	0.43
December 30	62	42	0.00
December 31	58	39	0.00

Next Year >

Weather Station Details

Years	Station	Coordinates
1999–2024	San Luis Obispo Airport	location
1893–1998	San Luis Obispo Poly	location