May weather forecast
San Jose, CA

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A sunset panorama of the lit city of San Jose, California
A sunset panorama of the lit city of San Jose, California

Weather in May

As the city of San Jose moves further into the spring season, May stirs a significant change in the weather dynamics. The additional transition of warmer temperatures is accompanied by a continuous reduction in rainfall, down to just 0.2in. There's a noticeable shift in the city's climate, the pleasant spring conditions make way for incoming summer. The alteration in weather elements makes May a delightful bridge of transformation from spring to summer.

Temperature

As San Jose welcomes May, the average high-temperature records at an agreeable 70.5°F, marking an insignificant deviation from the prior month. San Jose throughout May, experiences an average nighttime temperature of 48.9°F.

Humidity

In May, the average relative humidity is 66%.

Rainfall

In San Jose, in May, during 3.3 rainfall days, 0.2" of precipitation is typically accumulated. Throughout the year, in San Jose, there are 51.5 rainfall days, and 4.06" of precipitation is accumulated.

Daylight

The average length of the day in May is 14h and 11min.
On the first day of the month, sunrise is at 6:12 am and sunset at 7:56 pm. On the last day of May, in San Jose, sunrise is at 5:48 am and sunset at 8:21 pm PDT.

Sunshine

The average sunshine in May in San Jose is 11.1h.

UV index

The average daily maximum UV index in May in San Jose is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In May, an average UV index of 5 transforms into the following instructions:
Put precautions into practice - Protective measures against sun-induced damage are advised. To guard against the harmful effects of the Sun, minimize exposure during midday. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
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FAQ

What are May temperatures in San Jose?

During May, San Jose experiences an average high-temperature of 70.5°F and a low-temperature of 48.9°F.

What is the average humidity in May in San Jose?

The average relative humidity in May in San Jose, California, is 66%.

How many days does it rain in May in San Jose?

In May, in San Jose, California, the rain falls for 3.3 days. Throughout May, 0.2" of precipitation is accumulated.

What is the average length of the day in May in San Jose?

The average day length in May in San Jose, California, is 14h and 11min.

When are sunrise and sunset in May in San Jose?

On the first day of May, sunrise is at 6:12 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:21 pm PDT.

How many hours of sunshine does San Jose have in May?

The average sunshine duration in May in San Jose is 11.1h.

What is the UV index intensity in May in San Jose?

The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
San Jose, CA

Average temperature in May - San Jose, CA
  • Average high temperature in May: 70.5°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is December (56.5°F).

  • Average low temperature in May: 48.9°F

The month with the highest average low temperature is August (56.5°F).
The coldest month (with the lowest average low temperature) is December (43°F).

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Average pressure in May
San Jose, CA

Average pressure in May - San Jose, CA
  • Average pressure in May: 29.98"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

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Average wind speed in May
San Jose, CA

Average wind speed in May - San Jose, CA
  • Average wind speed in May: 5.8mph

The windiest months (with the highest average wind speed) are April and May (5.8mph).
The calmest months (with the lowest average wind speed) are September and October (4.4mph).

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Average humidity in May
San Jose, CA

Average humidity in May - San Jose, CA
  • Average humidity in May: 66%

The month with the highest relative humidity is March (73%).
The months with the lowest relative humidity are July and September (60%).

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Average rainfall in May
San Jose, CA

Average rainfall in May - San Jose, CA
  • Average rainfall in May: 0.2"

The wettest month (with the highest rainfall) is March (0.83").
The driest months (with the least rainfall) are June, July and August (0.04").

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Average rainfall days in May
San Jose, CA

Average rainfall days in May - San Jose, CA
  • Average rainfall days in May: 3.3 days

The month with the highest number of rainy days is March (9.8 days).
The month with the least rainy days is August (0.4 days).

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Average daylight in May /
Average sunshine in May
San Jose, CA

Average daylight in May / Average sunshine in May - San Jose, CA
  • Average daylight in May: 14h and 1min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in May: 11h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in May
San Jose, CA

Average sunshine days in May - San Jose, CA
  • Average sunshine days in May: 26.3 days

The month with the most sunshine days is August (29.7 days).
The month with the least sunshine days is March (19.5 days).

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Average UV index in May
San Jose, CA

Average UV index in May - San Jose, CA
  • Average UV index in May: 5

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in May
San Jose, CA

Average cloud cover in May - San Jose, CA
  • Average cloud cover in May: 21

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 6).

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Average visibility in May
San Jose, CA

Average visibility in May - San Jose, CA
  • Average visibility in May: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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San Jose, California, USA

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