, in the northern part of Santa Clara valley, and south of San Francisco bay. We are in the so-called Silicon Valley.
of the year, the temperature generally drops to around freezing, while during the day it remains around 10 °C (50 °F). But in December 1990, it dropped to -7 °C (19 °F). Snow is very rare; here, as in San Francisco, locals remember the snowfall of February 1976.
is definitely warmer than in San Francisco: there are several days with highs around 30 °C (86 °F), and on the
of the year (with the wind blowing from the desert), the temperature can reach 37/38 °C (99/100 °F). In June 2000 and in September 2017, it reached 43 °C (109.5 °F).
temperature ranges between 12 °C (54 °F) and 15 °C (59 °F). So, it is cold all year round.
The best time to visit San José is the spring, in April and May, since it is a mild and sunny period. In summer, from June to September, it is generally not too hot, but sometimes there can be very hot days.
. Here are the average temperatures.
January is generally a mild month. The average temperature is of
10.6 °C, with a minimum of
6.3 °C and a maximum of
15 °C.
On the coldest nights of the month, the temperature usually drops to around
0 °C. However, it dropped to
-4 °C in January 1997.
On the warmest days of the month, the temperature usually reaches around
21 °C. However, it reached
28 °C in January 2009.
Precipitation amounts to
75 mm, distributed over 10 days.
The day lasts on average 9 hours and 55 minutes.
The average humidity is 70%.
The average wind speed is of
8.2 kph.
The average sea temperature is of
12.4 °C. Therefore, the sea is very cold for swimming.
February is generally a mild month. The average temperature is of
12.3 °C, with a minimum of
7.4 °C and a maximum of
17.1 °C.
On the coldest nights of the month, the temperature usually drops to around
2 °C. However, it dropped to
-1 °C in February 2019.
On the warmest days of the month, the temperature usually reaches around
23.5 °C. However, it reached
29 °C in February 2002.
Precipitation amounts to
80 mm, distributed over 12 days.
The day lasts on average 10 hours and 55 minutes.
The average humidity is 65%.
The average wind speed is of
10.8 kph.
The average sea temperature is of
12.3 °C. Therefore, the sea is very cold for swimming.
March is generally a mild month. The average temperature is of
13.9 °C, with a minimum of
8.7 °C and a maximum of
19.1 °C.
On the coldest nights of the month, the temperature usually drops to around
3.5 °C. However, it dropped to
2 °C in March 1997.
On the warmest days of the month, the temperature usually reaches around
26 °C. However, it reached
35 °C in March 2015.
Precipitation amounts to
65 mm, distributed over 9 days.
The day lasts on average 12 hours and 0 minutes.
The average humidity is 62%.
The average wind speed is of
12.2 kph.
The average sea temperature is of
12.2 °C. Therefore, the sea is very cold for swimming.
April is generally a very mild month. The average temperature is of
15.5 °C, with a minimum of
9.9 °C and a maximum of
21.1 °C.
On the coldest nights of the month, the temperature usually drops to around
5 °C. However, it dropped to
3 °C in April 1999.
On the warmest days of the month, the temperature usually reaches around
30.5 °C. However, it reached
36 °C in April 2009.
Precipitation amounts to
30 mm, distributed over 6 days.
The day lasts on average 13 hours and 10 minutes.
The average humidity is 56%.
The average wind speed is of
14.4 kph.
The average sea temperature is of
12 °C. Therefore, the sea is very cold for swimming.
May is generally a very mild month. The average temperature is of
17.8 °C, with a minimum of
11.8 °C and a maximum of
23.8 °C.
On the coldest nights of the month, the temperature usually drops to around
8.5 °C. However, it dropped to
7 °C in May 1997.
On the warmest days of the month, the temperature usually reaches around
33 °C. However, it reached
38 °C in May 2000.
Precipitation amounts to
15 mm, distributed over 4 days.
The day lasts on average 14 hours and 10 minutes. So the days are long.
The average humidity is 53%.
The average wind speed is of
15 kph.
The average sea temperature is of
12.1 °C. Therefore, the sea is very cold for swimming.
June is generally a warm month. The average temperature is of
20.3 °C, with a minimum of
13.9 °C and a maximum of
26.7 °C.
On the coldest nights of the month, the temperature usually drops to around
11 °C. However, it dropped to
9 °C in June 1999.
On the warmest days of the month, the temperature usually reaches around
37 °C. However, it reached
43 °C in June 2000.
Precipitation amounts to only
5 mm, and all occurs in one day.
The day lasts on average 14 hours and 40 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
The average humidity is 50%.
The average wind speed is of
15 kph.
The average sea temperature is of
12.7 °C. Therefore, the sea is very cold for swimming.
July is generally a warm month. The average temperature is of
21.5 °C, with a minimum of
15.1 °C and a maximum of
27.9 °C.
On the coldest nights of the month, the temperature usually drops to around
13 °C. However, it dropped to
11 °C in July 2002.
On the warmest days of the month, the temperature usually reaches around
36.5 °C. However, it reached
42 °C in July 2006.
Precipitation amounts to only
0 mm, so on average it never rains in the whole month.
The day lasts on average 14 hours and 25 minutes. So the days are long.
The average humidity is 52%.
The average wind speed is of
13.6 kph.
The average sea temperature is of
13.7 °C. Therefore, the sea is very cold for swimming.
August, the warmest month of the year, is generally a warm month. The average temperature is of
21.8 °C, with a minimum of
15.4 °C and a maximum of
28.2 °C.
On the coldest nights of the month, the temperature usually drops to around
12.5 °C. However, it dropped to
11 °C in August 2010.
On the warmest days of the month, the temperature usually reaches around
36.5 °C. However, it reached
40.5 °C in August 1993.
Precipitation amounts to only
0 mm, so on average it never rains in the whole month.
The day lasts on average 13 hours and 30 minutes.
The average humidity is 53%.
The average wind speed is of
12.9 kph.
The average sea temperature is of
14.6 °C. Therefore, the sea is very cold for swimming.
September is generally a warm month. The average temperature is of
21 °C, with a minimum of
14.6 °C and a maximum of
27.4 °C.
On the coldest nights of the month, the temperature usually drops to around
10.5 °C. However, it dropped to
9 °C in September 1999.
On the warmest days of the month, the temperature usually reaches around
36 °C. However, it reached
43 °C in September 2017.
Precipitation amounts to only
0 mm, so on average it never rains in the whole month.
The day lasts on average 12 hours and 25 minutes.
The average humidity is 52%.
The average wind speed is of
11.5 kph.
The average sea temperature is of
14.9 °C. Therefore, the sea is cold for swimming.
October is generally a very mild month. The average temperature is of
17.9 °C, with a minimum of
12.1 °C and a maximum of
23.7 °C.
On the coldest nights of the month, the temperature usually drops to around
7 °C. However, it dropped to
4.4 °C in October 1991.
On the warmest days of the month, the temperature usually reaches around
32.5 °C. However, it reached
37 °C in October 2012.
Precipitation amounts to
20 mm, distributed over 3 days.
The day lasts on average 11 hours and 10 minutes.
The average humidity is 54%.
The average wind speed is of
9.8 kph.
The average sea temperature is of
14.6 °C. Therefore, the sea is very cold for swimming.
November is generally a mild month. The average temperature is of
13.4 °C, with a minimum of
8.4 °C and a maximum of
18.3 °C.
On the coldest nights of the month, the temperature usually drops to around
2.5 °C. However, it dropped to
-1.2 °C in November 1993.
On the warmest days of the month, the temperature usually reaches around
26 °C. However, it reached
30 °C in November 1997.
Precipitation amounts to
35 mm, distributed over 7 days.
The day lasts on average 10 hours and 5 minutes.
The average humidity is 63%.
The average wind speed is of
8.2 kph.
The average sea temperature is of
13.8 °C. Therefore, the sea is very cold for swimming.
December, the coldest month of the year, is generally a mild month. The average temperature is of
10.4 °C, with a minimum of
6 °C and a maximum of
14.9 °C.
On the coldest nights of the month, the temperature usually drops to around
0 °C. However, it dropped to
-3 °C in December 1998.
On the warmest days of the month, the temperature usually reaches around
20.5 °C. However, it reached
28 °C in December 1998.
Precipitation amounts to
80 mm, distributed over 11 days.
The day lasts on average 9 hours and 35 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
The average humidity is 67%.
The average wind speed is of
8.8 kph.
The average sea temperature is of
12.9 °C. Therefore, the sea is very cold for swimming.