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Gilroy September Weather

Averages and records for weather in Gilroy, California in the month of September.

Typical Gilroy September Weather 1991–2020
Average daily high	85.8 °F
Average daily low	54.1 °F
Average monthly precipitation	0.0 inches
Average monthly snow	none
Daily chance of precipitation	2.0%
Daily chance of snow	0%

Gilroy September Weather Records 1906–2023
Highest temperature	113 °F	September 6, 2022
Lowest temperature	30 °F	September 25, 2009
Highest daily low	72 °F	September 3, 2017
Lowest daily high	60 °F	September 16, 2016
Hottest average high temperature	92.4 °F	1979
Coldest average high temperature	77.0 °F	1986
Most daily precipitation	2.0 inches	September 29, 1976
Most monthly precipitation	2.7 inches	1976
Most daily snow	none	-
Most monthly snow	none	-

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
September 1	86.8	55.0	107	45
September 2	86.6	54.9	112	44
September 3	86.5	54.8	104	46
September 4	86.5	54.7	103	46
September 5	86.5	54.6	112	45
September 6	86.6	54.5	113	46
September 7	86.5	54.5	112	44
September 8	86.4	54.4	110	46
September 9	86.3	54.3	104	44
September 10	86.3	54.3	104	42
September 11	86.3	54.2	104	45
September 12	86.2	54.1	107	39
September 13	86.0	54.0	107	44
September 14	85.9	54.0	106	41
September 15	85.9	53.8	109	45
September 16	85.7	53.8	104	43
September 17	85.5	53.7	103	37
September 18	85.3	53.6	98	38
September 19	85.2	53.5	102	44
September 20	85.0	53.4	101	41
September 21	84.7	53.2	101	41
September 22	84.3	53.0	104	41
September 23	84.1	52.9	101	43
September 24	84.1	52.8	102	42
September 25	84.1	52.6	106	30
September 26	83.9	52.5	104	40
September 27	83.7	52.4	108	40
September 28	83.4	52.2	101	38
September 29	83.3	52.0	104	44
September 30	83.4	51.8	104	42

Weather Station Details

Years	Station	Coordinates
1906–2023	Gilroy	location