San Juan Weather in 1978

Historical record of San Juan, Puerto Rico weather for the year 1978 based on NOAA data.

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1978 San Juan Weather Extremes
Highest temperature	95 °F	October 20
Lowest temperature	68 °F	February 16
Highest daily low	81 °F	August 11
Lowest daily high	78 °F	October 26
Most daily precipitation	2.6 inches	April 11
Most daily snow	none	-
Total annual precipitation	49.9 inches	-
Total annual snow	none	-

What was the hottest temperature in San Juan in 1978?

The highest temperature recorded in San Juan, Puerto Rico in 1978 was 95 °F which happened 2 different times.

Highest Temperatures: All-Time By Year

Highest Temperatures in San Juan in 1978

Rank	Temperature	Date
1	95 °F	Oct 20
1	95 °F	Sep 28
3	94 °F	Oct 19
3	94 °F	Sep 14
3	94 °F	Jun 30
3	94 °F	Apr 28
7	93 °F	Nov 1
7	93 °F	Sep 27
7	93 °F	Sep 17
7	93 °F	Sep 9

What was the coldest temperature in San Juan in 1978?

The lowest temperature recorded in San Juan, Puerto Rico in 1978 was 68 °F which happened on Feb 16.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in San Juan in 1978

Rank	Temperature	Date
1	68 °F	February 16
2	69 °F	February 17
2	69 °F	February 14
2	69 °F	January 11
5	70 °F	December 30
5	70 °F	February 26
5	70 °F	February 21
5	70 °F	February 15
5	70 °F	January 20
5	70 °F	January 14
5	70 °F	January 13
5	70 °F	January 10
5	70 °F	January 8
5	70 °F	January 5
5	70 °F	January 4

January 1978 San Juan Weather

Day	High (°F)	Low (°F)	Precip. (inches)
January 1	85	73	0.01
January 2	85	72	0.00
January 3	84	71	0.00
January 4	85	70	0.00
January 5	86	70	0.00
January 6	84	72	0.19
January 7	82	73	0.12
January 8	83	70	0.05
January 9	85	71	0.00
January 10	85	70	0.00
January 11	85	69	0.00
January 12	83	71	0.00
January 13	84	70	0.00
January 14	88	70	0.00
January 15	86	71	0.00
January 16	86	74	0.00
January 17	85	71	0.02
January 18	84	73	0.02
January 19	84	71	0.05
January 20	84	70	0.01
January 21	85	71	0.04
January 22	85	71	0.00
January 23	89	73	0.00
January 24	86	71	0.00
January 25	85	72	0.00
January 26	86	73	0.00
January 27	86	71	0.00
January 28	85	72	0.05
January 29	90	73	0.00
January 30	86	71	0.00
January 31	86	72	0.05

February 1978 San Juan Weather

Day	High (°F)	Low (°F)	Precip. (inches)
February 1	87	71	0.16
February 2	85	75	0.24
February 3	85	73	0.19
February 4	86	74	0.02
February 5	87	72	0.00
February 6	88	72	0.00
February 7	87	76	0.00
February 8	87	71	0.00
February 9	89	71	0.00
February 10	89	73	0.00
February 11	83	73	0.20
February 12	84	75	0.00
February 13	84	71	0.00
February 14	84	69	0.00
February 15	86	70	0.00
February 16	85	68	0.00
February 17	85	69	0.00
February 18	88	71	0.00
February 19	90	73	0.00
February 20	91	74	0.00
February 21	91	70	0.00
February 22	87	72	0.00
February 23	82	71	0.45
February 24	85	73	0.08
February 25	87	76	0.00
February 26	86	70	0.00
February 27	87	71	0.05
February 28	85	71	0.17

March 1978 San Juan Weather

Day	High (°F)	Low (°F)	Precip. (inches)
March 1	86	72	0.00
March 2	86	76	0.00
March 3	86	74	0.00
March 4	91	73	0.00
March 5	90	75	0.00
March 6	86	75	0.16
March 7	80	74	0.26
March 8	79	73	1.34
March 9	84	72	0.14
March 10	84	72	0.00
March 11	91	72	0.03
March 12	87	73	0.00
March 13	87	73	0.00
March 14	86	73	0.04
March 15	85	75	0.00
March 16	85	74	0.00
March 17	85	75	0.00
March 18	86	73	0.05
March 19	84	74	0.08
March 20	86	73	0.20
March 21	87	72	0.01
March 22	89	71	0.00
March 23	85	71	0.03
March 24	89	71	0.00
March 25	87	72	0.76
March 26	89	74	0.00
March 27	87	74	0.00
March 28	87	74	0.00
March 29	86	74	0.00
March 30	89	71	0.00
March 31	87	74	0.42

April 1978 San Juan Weather

Day	High (°F)	Low (°F)	Precip. (inches)
April 1	84	73	0.72
April 2	90	73	0.87
April 3	85	75	0.03
April 4	83	74	0.01
April 5	84	73	0.00
April 6	85	75	0.00
April 7	86	75	0.00
April 8	86	75	0.00
April 9	84	74	0.11
April 10	86	72	1.90
April 11	86	73	2.57
April 12	85	74	0.00
April 13	84	73	0.40
April 14	85	73	0.20
April 15	87	73	0.00
April 16	85	73	0.00
April 17	86	73	0.00
April 18	87	74	0.00
April 19	86	74	0.22
April 20	87	73	0.11
April 21	87	73	0.20
April 22	87	74	0.11
April 23	85	73	0.06
April 24	84	73	0.20
April 25	91	72	0.00
April 26	91	74	0.00
April 27	91	76	0.00
April 28	94	75	0.00
April 29	87	75	0.00
April 30	87	74	0.56

May 1978 San Juan Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	92	74	0.00
May 2	91	75	0.00
May 3	88	76	0.00
May 4	86	75	0.60
May 5	88	73	0.05
May 6	88	73	0.00
May 7	89	74	0.02
May 8	88	73	0.00
May 9	86	73	0.10
May 10	86	74	0.06
May 11	80	75	1.90
May 12	87	75	0.01
May 13	86	73	0.00
May 14	87	74	0.00
May 15	87	73	0.00
May 16	87	74	0.59
May 17	89	75	0.00
May 18	87	75	0.06
May 19	86	73	0.14
May 20	88	75	0.01
May 21	86	76	0.00
May 22	91	76	0.09
May 23	89	74	0.00
May 24	83	76	0.00
May 25	86	75	1.34
May 26	85	73	0.42
May 27	89	73	1.21
May 28	89	74	0.54
May 29	86	76	0.00
May 30	87	74	0.00
May 31	88	75	0.00

June 1978 San Juan Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	88	76	0.00
June 2	90	77	0.00
June 3	88	77	0.07
June 4	87	76	0.00
June 5	89	76	0.00
June 6	88	75	0.00
June 7	89	75	0.04
June 8	90	75	0.05
June 9	88	75	0.00
June 10	89	76	0.00
June 11	89	73	0.20
June 12	90	74	0.04
June 13	90	75	0.15
June 14	90	75	0.53
June 15	88	75	0.00
June 16	88	75	0.03
June 17	92	76	0.00
June 18	88	77	0.00
June 19	88	78	0.06
June 20	90	76	0.15
June 21	89	77	0.10
June 22	90	76	0.00
June 23	89	76	0.04
June 24	90	75	0.22
June 25	88	74	0.15
June 26	87	75	0.30
June 27	87	74	0.67
June 28	89	75	0.03
June 29	89	75	0.03
June 30	94	76	0.00

July 1978 San Juan Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	92	76	0.00
July 2	90	75	0.32
July 3	90	77	0.17
July 4	90	78	0.00
July 5	88	73	0.31
July 6	87	75	0.19
July 7	88	76	0.04
July 8	90	76	0.00
July 9	89	77	0.01
July 10	88	77	0.00
July 11	88	75	0.39
July 12	88	74	0.06
July 13	87	76	0.63
July 14	88	78	0.09
July 15	90	77	0.05
July 16	89	79	0.00
July 17	89	81	0.00
July 18	87	75	0.58
July 19	88	75	0.03
July 20	87	75	0.08
July 21	87	77	0.01
July 22	89	77	0.28
July 23	92	77	0.22
July 24	89	79	0.00
July 25	89	78	0.00
July 26	89	77	0.00
July 27	90	77	0.00
July 28	90	81	0.00
July 29	91	80	0.00
July 30	90	81	0.00
July 31	90	80	0.00

August 1978 San Juan Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	89	76	0.01
August 2	89	77	0.00
August 3	86	78	0.00
August 4	88	78	0.17
August 5	89	79	0.00
August 6	89	77	0.00
August 7	88	76	0.11
August 8	89	75	0.26
August 9	88	78	0.11
August 10	89	78	0.05
August 11	91	81	0.00
August 12	91	79	0.10
August 13	89	77	0.09
August 14	86	78	0.10
August 15	89	75	0.08
August 16	85	73	1.34
August 17	89	76	0.24
August 18	86	75	0.21
August 19	89	76	0.15
August 20	90	77	0.05
August 21	89	76	0.11
August 22	92	78	0.00
August 23	90	78	0.00
August 24	89	78	0.00
August 25	89	78	0.00
August 26	90	77	0.03
August 27	90	79	0.00
August 28	91	78	0.00
August 29	91	78	0.00
August 30	92	78	0.00
August 31	91	77	0.00

September 1978 San Juan Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	91	77	0.02
September 2	90	76	2.56
September 3	87	76	0.18
September 4	91	76	0.01
September 5	89	75	0.00
September 6	89	78	0.00
September 7	90	80	0.00
September 8	91	79	0.00
September 9	93	78	0.00
September 10	91	78	0.00
September 11	91	79	0.00
September 12	87	78	0.12
September 13	91	78	0.00
September 14	94	79	0.00
September 15	92	77	0.00
September 16	91	77	0.28
September 17	93	78	0.26
September 18	91	78	0.07
September 19	92	77	0.15
September 20	88	78	0.13
September 21	92	79	0.00
September 22	88	76	0.87
September 23	88	76	1.16
September 24	89	76	0.20
September 25	88	76	0.00
September 26	88	75	0.28
September 27	93	76	0.05
September 28	95	78	0.00
September 29	90	78	0.00
September 30	89	78	0.00

October 1978 San Juan Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	89	78	0.13
October 2	90	77	0.00
October 3	90	77	0.00
October 4	91	77	0.00
October 5	90	77	0.15
October 6	91	78	0.18
October 7	90	77	0.01
October 8	90	78	0.00
October 9	89	80	0.19
October 10	90	77	0.01
October 11	92	77	0.01
October 12	90	78	0.01
October 13	88	76	0.10
October 14	88	74	0.02
October 15	90	76	0.00
October 16	90	78	0.00
October 17	90	75	0.00
October 18	91	75	0.01
October 19	94	76	0.00
October 20	95	76	0.04
October 21	92	76	0.00
October 22	91	79	0.01
October 23	86	78	0.11
October 24	85	77	0.00
October 25	80	73	0.31
October 26	78	74	2.16
October 27	83	73	0.63
October 28	89	76	0.00
October 29	90	77	0.03
October 30	89	74	0.28
October 31	84	75	0.49

November 1978 San Juan Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	93	76	0.00
November 2	92	78	0.01
November 3	92	76	0.00
November 4	89	76	0.06
November 5	90	79	0.01
November 6	89	76	0.09
November 7	89	77	0.00
November 8	89	77	0.22
November 9	88	78	0.23
November 10	88	76	0.17
November 11	88	76	0.05
November 12	84	75	1.14
November 13	86	74	0.42
November 14	86	73	0.36
November 15	87	73	0.05
November 16	88	76	0.00
November 17	86	75	1.18
November 18	87	76	0.43
November 19	85	76	0.07
November 20	87	77	0.09
November 21	87	77	0.24
November 22	87	76	0.05
November 23	87	76	0.01
November 24	86	75	0.04
November 25	87	74	0.00
November 26	87	74	0.00
November 27	88	75	0.00
November 28	87	77	0.14
November 29	87	78	0.10
November 30	86	75	0.24

December 1978 San Juan Weather

Day	High (°F)	Low (°F)	Precip. (inches)
December 1	87	75	0.18
December 2	87	74	0.31
December 3	86	74	0.00
December 4	87	76	0.01
December 5	87	76	0.09
December 6	87	76	0.12
December 7	87	76	0.38
December 8	87	77	0.02
December 9	86	73	0.00
December 10	85	74	0.00
December 11	87	73	0.00
December 12	86	73	0.08
December 13	86	74	0.00
December 14	84	71	0.00
December 15	85	73	0.00
December 16	86	74	0.04
December 17	86	73	0.00
December 18	85	72	0.00
December 19	85	73	0.72
December 20	84	72	0.16
December 21	83	75	0.02
December 22	86	73	0.00
December 23	85	72	0.22
December 24	85	74	0.04
December 25	85	74	0.02
December 26	87	73	0.00
December 27	86	71	0.00
December 28	87	71	0.00
December 29	83	72	0.00
December 30	83	70	0.00
December 31	83	73	0.20

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Weather Station Details

Years	Station	Coordinates
1956–2024	San Juan Airport	location