May weather forecast
San Jose, CA

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

The last month of the spring, May, is an agreeable month in San Jose, California, with average temperature ranging between max 70.5°F (21.4°C) and min 48.9°F (9.4°C).

Temperature

In San Jose, the average high-temperature is practically the same as in April - an agreeable 70.5°F (21.4°C). In May, the average low-temperature is 48.9°F (9.4°C).

Humidity

The average relative humidity in San Jose is 66%.

Rainfall

In San Jose, California, in May, during 3.3 rainfall days, 0.2" (5mm) of precipitation is typically accumulated. Throughout the year, there are 51.5 rainfall days, and 4.06" (103mm) of precipitation is accumulated.

Daylight

The average length of the day in San Jose is 14.2h.

Sunshine

In San Jose, California, the average sunshine is 11.1h.

UV index

In San Jose, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In May, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the average humidity in May in San Jose?

In May, the average relative humidity is 66%.

How much does it rain in San Jose in May?

In San Jose, California, in May, during 3.3 rainfall days, 0.2" (5mm) of precipitation is typically accumulated.

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

The average length of the day in May in San Jose is 14.2h.

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

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

How high is the UV index in May in San Jose?

In San Jose, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV rays.

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"

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

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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%).
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: 14.2h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in May: 11.1h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6h).

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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

Months with the highest UV index are June, July and August (UV index 6).
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

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

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