May weather forecast
San Joaquin, CA

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Weather in May

The last month of the spring, May, is another warm month in San Joaquin, California, with temperature in the range of an average low of 56.7°F (13.7°C) and an average high of 82°F (27.8°C).

Temperature

A minor escalation in the average high-temperature is seen with the onset of May, moving from a warm 73.9°F (23.3°C) in April to a still moderately hot 82°F (27.8°C). San Joaquin's May nights cool down significantly from the day's heat, to an average low-temperature of 56.7°F (13.7°C).

Heat index

The heat index value for May is evaluated at 82.4°F (28°C). Long-standing exposure and activity could induce a feeling of tiredness and lead to heat cramps.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is achieved by amalgamating air temperature with the relative humidity readings. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.

Humidity

In San Joaquin, California, the average relative humidity in May is 42%.

Rainfall

In San Joaquin, during May, the rain falls for 2.7 days and regularly aggregates up to 0.16" (4mm) of precipitation. Throughout the year, in San Joaquin, California, there are 37.2 rainfall days, and 2.48" (63mm) of precipitation is accumulated.

Daylight

The average length of the day in May is 14h and 8min.
On the first day of May, sunrise is at 6:06 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 5:43 am and sunset at 8:13 pm PDT.

Sunshine

In San Joaquin, the average sunshine in May is 11.5h.

UV index

The average daily maximum UV index in May is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: A typical high UV index of 6 in May suggests the following recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
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Frequently asked questions

What are May temperatures in San Joaquin?

The high-temperature during May is 82°F (27.8°C) and the low-temperature is 56.7°F (13.7°C). In May, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is evaluated at 82.4°F (28°C).

What is the average humidity in May in San Joaquin?

In May, the average relative humidity in San Joaquin is 42%.

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

In May, in San Joaquin, California, the rain falls for 2.7 days. Throughout May, 0.16" (4mm) of precipitation is accumulated.

How many hours of daylight does San Joaquin have in May?

In San Joaquin, the average day length in May is 14h and 8min.

When are sunrise and sunset in May in San Joaquin?

On the first day of May in San Joaquin, sunrise is at 6:06 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 5:43 am and sunset at 8:13 pm PDT.

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

In May, the average sunshine duration in San Joaquin, California, is 11.5h.

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

The average daily maximum UV index in May in San Joaquin, California, is 6. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
San Joaquin, CA

Average temperature in May - San Joaquin, CA
  • Average high temperature in May: 82°F

The warmest month (with the highest average high temperature) is July (100.9°F).
The month with the lowest average high temperature is December (56.5°F).

  • Average low temperature in May: 56.7°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is December (42.6°F).

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Average pressure in May
San Joaquin, CA

Average pressure in May - San Joaquin, CA
  • Average pressure in May: 29.95"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in May
San Joaquin, CA

Average wind speed in May - San Joaquin, CA
  • Average wind speed in May: 7.1mph

The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest month (with the lowest average wind speed) is January (5.1mph).

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Average humidity in May
San Joaquin, CA

Average humidity in May - San Joaquin, CA
  • Average humidity in May: 42%

The months with the highest relative humidity are January and December (66%).
The month with the lowest relative humidity is July (30%).

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Average rainfall in May
San Joaquin, CA

Average rainfall in May - San Joaquin, CA
  • Average rainfall in May: 0.16"

The wettest months (with the highest rainfall) are February and March (0.43").
The driest months (with the least rainfall) are June, July, August and September (0.04").

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Average rainfall days in May
San Joaquin, CA

Average rainfall days in May - San Joaquin, CA
  • Average rainfall days in May: 2.7 days

The month with the highest number of rainy days is March (7 days).
The months with the least rainy days are August and September (0.5 days).

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

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

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

  • Average sunshine in May: 11h and 3min

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The months with the least sunshine are February and December (Average sunshine: 6h and 24min).

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Average sunshine days in May
San Joaquin, CA

Average sunshine days in May - San Joaquin, CA
  • Average sunshine days in May: 27.5 days

The month with the most sunshine days is August (29.7 days).
The month with the least sunshine days is February (22 days).

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Average UV index in May
San Joaquin, CA

Average UV index in May - San Joaquin, CA
  • Average UV index in May: 6

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).

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Average cloud cover in May
San Joaquin, CA

Average cloud cover in May - San Joaquin, CA
  • Average cloud cover in May: 15

The month with the most cloud cover is March (Cloud cover 29).
The months with the least cloud cover are July and August (Cloud cover 4).

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Average visibility in May
San Joaquin, CA

Average visibility in May - San Joaquin, 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 Joaquin, California, USA

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