Weather in Santa Clara County

Calculated from weather data of Reid-Hillview Of Santa Clara County Airport (KRHV) between 2020 and 2024.

Maximum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	60.0	60.0	60.0	62.0	61.0	59.0
February	63.0	62.0	59.0	67.0	63.0	66.0
March	65.0	64.0	59.0	69.0	64.0	62.0
April	67.0		70.0	71.0	70.0	69.0
May	74.0		72.0	77.0	77.0	78.0
June	82.0		76.0	83.0	81.0	83.0
July	85.0		87.0	83.0	84.0	84.0
August	86.0		88.0	86.0	85.0	87.0
September	83.0		79.0	86.0	83.0	84.0
October	77.0		78.0	75.0	74.0	82.0
November	67.0		70.0	63.0	67.0	65.0
December	60.0		63.0	55.0	57.0	61.0
Average	71.0	62.0	72.0	74.0	72.0	73.0

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	46.0	47	45	42	46	46
February	45.0	46	39	42	46	49
March	48.0	48	44	46	47	49
April	50.0		48	50	53	52
May	55.0		53	53	55	57
June	60.0		56	60	62	62
July	61.0		60	61	63	60
August	63.0		63	61	62	65
September	61.0		58	62	61	63
October	55.0		54	53	57	58
November	48.0		47	42	52	46
December	45.0		46	40	46	43
Average	52.0	47.0	51.0	51.0	54.0	54.0

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Cold and hot days

Number of days	2024	2023	2022	2021	2020
86 °F or warmer	0	44	49	44	54
77 °F or warmer	0	114	133	133	149
68 °F or warmer	13	196	225	216	215
32 °F or colder	0	3	4	0	0

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	4.1	4	7	0	1	2
February	2.6	3	6	0	1	0
March	3.5	2	6	0	1	2
April	1.5		1	2	0	4
May	0.4		1	0	0	0
June	0.0		0	0	0	0
July	0.0		0	0	0	0
August	0.0		0	0	0	0
September	0.1		0	0	0	0
October	0.2		0	0	2	0
November	1.8		2	1	1	2
December	2.3		3	2	5	1
Average	1.5	2.9	2.0	0.3	0.8	0.9

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (miles per hour)

Month	Average	2024	2023	2022	2021	2020
January	5.8	5	10	3	5	4
February	6.3	7	6	5	5	6
March	6.7	7	8	6	7	5
April	6.7		7	7	7	5
May	7.1		6	8	8	6
June	7.4		7	8	8	7
July	6.2		5	6	6	6
August	6.1		6	6	5	5
September	5.5		5	5	5	4
October	5.0		5	4	6	3
November	4.0		4	3	4	4
December	4.7		4	4	6	3
Average	6.1	6.2	6.1	5.5	6.1	4.7

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	S	SE	NW	NW	NW
February	SE	W	NW	NW	NW
March	W	S	NW	NW	W
April		NW	NW	NW	NW
May		W	NW	NW	NW
June		W	NW	NW	NW
July		NW	NW	NW	W
August		NW	NW	NW	NW
September		NW	NW	NW	NW
October		NW	NW	NW	NW
November		W	NW	NW	NW
December		SE	S	SE	NW

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.

Santa Clara County weather Q&A

What is the warmest month in Santa Clara County?

The warmest month is August with an average temperature of 86 °F over the past years.

What is the coldest month in Santa Clara County?

The coldest month is January with an average daytime temperature of 60 °F in the past few years.

Which month is the wettest in Santa Clara County?

Chance of precipitation is the highest in January with a probability of around 4.2 %.

Which month is the driest in Santa Clara County?

The least rainfall and snow can be expected in July. The probability is about 0.0 %.