Climate of San Diego
Monthly averages

Climate of San Diego

Section Title: Monthly averages
Table Section Text: None

Climate data for San Diego Int'l Airport (1981–2010 normals, extremes 1874–present)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year

Record high °F (°C)	88 (31)	90 (32)	99 (37)	98 (37)	98 (37)	101 (38)	100 (38)	98 (37)	111 (44)	107 (42)	100 (38)	88 (31)	111 (44)

Mean maximum °F (°C)	78.4 (25.8)	79.2 (26.2)	79.8 (26.6)	82.8 (28.2)	79.0 (26.1)	81.2 (27.3)	83.2 (28.4)	85.4 (29.7)	89.5 (31.9)	86.8 (30.4)	82.9 (28.3)	76.6 (24.8)	94.1 (34.5)

Average high °F (°C)	65.1 (18.4)	65.0 (18.3)	65.6 (18.7)	67.5 (19.7)	68.5 (20.3)	70.8 (21.6)	74.6 (23.7)	76.4 (24.7)	75.9 (24.4)	72.8 (22.7)	69.0 (20.6)	64.7 (18.2)	69.7 (20.9)

Average low °F (°C)	49.0 (9.4)	50.7 (10.4)	53.2 (11.8)	55.9 (13.3)	59.4 (15.2)	62.0 (16.7)	65.4 (18.6)	66.7 (19.3)	65.2 (18.4)	60.6 (15.9)	53.6 (12.0)	48.4 (9.1)	57.5 (14.2)

Mean minimum °F (°C)	41.9 (5.5)	44.6 (7.0)	47.1 (8.4)	50.7 (10.4)	55.0 (12.8)	59.1 (15.1)	62.5 (16.9)	63.3 (17.4)	60.4 (15.8)	54.4 (12.4)	45.8 (7.7)	41.4 (5.2)	40.3 (4.6)

Record low °F (°C)	25 (−4)	34 (1)	36 (2)	39 (4)	45 (7)	50 (10)	54 (12)	54 (12)	50 (10)	43 (6)	36 (2)	32 (0)	25 (−4)

Average rainfall inches (mm)	1.98 (50)	2.27 (58)	1.81 (46)	0.78 (20)	0.12 (3.0)	0.07 (1.8)	0.03 (0.76)	0.02 (0.51)	0.15 (3.8)	0.57 (14)	1.01 (26)	1.53 (39)	10.34 (263)

Average rainy days (≥ 0.01 in)	6.7	7.1	6.5	4.0	1.4	0.8	0.7	0.4	1.2	2.8	4.1	5.8	41.5

Average relative humidity (%)	63.1	65.7	67.3	67.0	70.6	74.0	74.6	74.1	72.7	69.4	66.3	63.7	69.0

Mean monthly sunshine hours	239.3	227.4	261.0	276.2	250.5	242.4	304.7	295.0	253.3	243.4	230.1	231.3	3,054.6

Percent possible sunshine	75	74	70	71	58	57	70	71	68	69	73	74	69

Source: NOAA (sun and relative humidity 1961–1990)

Sentence(s)

The record high temperature in San Diego was 111 °F (44 °C) in September.
The record high temperature in San Diego was 111 °F (44 °C) in September.
The record high temperature in San Diego of 111 °F (44 °C) was in September.

final_sentence: The record high temperature in San Diego was 111 °F (44 °C) in September.
final_sentence: The record high temperature in San Diego was 111 °F (44 °C) in September.
final_sentence: The record high temperature in San Diego of 111 °F (44 °C) was in September.