May weather forecast and climate
Hayward, CA

The landscape of the famed Verdant Hills in Hayward, California
The landscape of the famed Verdant Hills in Hayward, California

Weather in May

May, the last month of the spring, in Hayward, is an agreeable month, with temperature in the range of an average high of 70.3°F (21.3°C) and an average low of 49.1°F (9.5°C).

Temperature

In Hayward, the average high-temperature is relatively the same as in April - a pleasant 70.3°F (21.3°C). In May, the average low-temperature is 49.1°F (9.5°C).

Humidity

In May, the average relative humidity in Hayward is 67%.

Rainfall

In Hayward, during May, the rain falls for 4.3 days and regularly aggregates up to 0.51" (13mm) of precipitation. In Hayward, during the entire year, the rain falls for 69.2 days and collects up to 11.1" (282mm) of precipitation.

Daylight

In May, the average length of the day in Hayward, California, is 14.2h.

Sunshine

The average sunshine in May is 10.9h.

UV index

The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in May in Hayward?

The average high-temperature, in May, is 70.3°F (21.3°C), while the average low-temperature is 49.1°F (9.5°C).

What is the average humidity in May in Hayward?

In May, the average relative humidity in Hayward is 67%.

How much does it rain in Hayward in May?

In Hayward, in May, it is raining for 4.3 days, with typically 0.51" (13mm) of accumulated precipitation.

What is the average length of the day in May in Hayward?

The average length of the day in May in Hayward, California, is 14.2h.

How long on average sun shines in May in Hayward?

In May, the average sunshine is 10.9h.

What is the UV index reading in May in Hayward?

In May, the average daily maximum UV index in Hayward, California, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in May
Hayward, CA

Average temperature in May - Hayward, CA
  • Average high temperature in May: 70.3°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is December (55.9°F).

  • Average low temperature in May: 49.1°F

The month with the highest average low temperature is August (56.5°F).
The coldest months (with the lowest average low temperature) are January and December (43.7°F).

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Average pressure in May
Hayward, CA

Average pressure in May - Hayward, CA
  • Average pressure in May: 29.98"

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in May
Hayward, CA

Average wind speed in May - Hayward, CA
  • Average wind speed in May: 6.6mph

The windiest month (with the highest average wind speed) is May (6.6mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).

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Average humidity in May
Hayward, CA

Average humidity in May - Hayward, CA
  • Average humidity in May: 67%

The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (61%).

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Average rainfall in May
Hayward, CA

Average rainfall in May - Hayward, CA
  • Average rainfall in May: 0.51"

The wettest month (with the highest rainfall) is February (2.28").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in May
Hayward, CA

Average rainfall days in May - Hayward, CA
  • Average rainfall days in May: 4.3 days

The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (0.9 days).

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Average daylight in May /
Average sunshine in May
Hayward, CA

Average daylight in May / Average sunshine in May - Hayward, 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: 10.9h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.9h).

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Average sunshine days in May
Hayward, CA

Average sunshine days in May - Hayward, CA
  • Average sunshine days in May: 26 days

The month with the most sunshine days is August (28.9 days).
The month with the least sunshine days is March (17.3 days).

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Average UV index in May
Hayward, CA

Average UV index in May - Hayward, CA
  • Average UV index in May: 5

The month with the highest UV index is June (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
Hayward, CA

Average cloud cover in May - Hayward, CA
  • Average cloud cover in May: 22

Months with the most cloud cover are March and December (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 7).

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Average visibility in May
Hayward, CA

Average visibility in May - Hayward, 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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