May weather forecast and climate
Merced, CA

Weather in May

May, the last month of the spring, in Merced, is also a moderately hot month, with average temperature fluctuating between 55.2°F (12.9°C) and 81.5°F (27.5°C).

Temperature

In Merced, the average high-temperature marginally rises, from 73.4°F (23°C) in April, to a still moderately hot 81.5°F (27.5°C). In Merced, in May, the average low-temperature is 55.2°F (12.9°C).

Heat index

In May, the average heat index is appraised at 81.9°F (27.7°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, differences in body mass, height, and shape, wind), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Merced, the average relative humidity is 47%.

Rainfall

In Merced, during May, the rain falls for 4.9 days and regularly aggregates up to 0.75" (19mm) of precipitation. In Merced, during the entire year, the rain falls for 62.9 days and collects up to 11.69" (297mm) of precipitation.

Daylight

The average length of the day in Merced is 14.2h.

Sunshine

In May, the average sunshine is 11.3h.

UV index

The average daily maximum UV index in Merced is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 in May interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in May in Merced?

In Merced, in May, the average high-temperature is 81.5°F (27.5°C), and the average low-temperature is 55.2°F (12.9°C). In May, the average heat index (a.k.a. 'felt air temperature', 'feels like'), that factores the actual air temperature with the relative humidity, is evaluated at 81.9°F (27.7°C).

What is the average humidity in May in Merced?

In Merced, California, the average relative humidity in May is 47%.

How many days does it rain in May in Merced?

In Merced, in May, it is raining for 4.9 days, with typically 0.75" (19mm) of accumulated precipitation.

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

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

How many hours of sunshine does Merced have in May?

In Merced, the average sunshine in May is 11.3h.

What is the UV index reading in May in Merced?

In May, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to the UV radiation.

Average temperature in May
Merced, CA

Average temperature in May - Merced, CA
  • Average high temperature in May: 81.5°F

The warmest month (with the highest average high temperature) is July (99.1°F).
The month with the lowest average high temperature is December (55.9°F).

  • Average low temperature in May: 55.2°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).

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Average pressure in May
Merced, CA

Average pressure in May - Merced, CA
  • Average pressure in May: 29.96"

The month with the highest atmospheric pressure is January (30.15").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in May
Merced, CA

Average wind speed in May - Merced, CA
  • Average wind speed in May: 7.6mph

The windiest month (with the highest average wind speed) is June (8.3mph).
The calmest months (with the lowest average wind speed) are January and November (5.2mph).

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Average humidity in May
Merced, CA

Average humidity in May - Merced, CA
  • Average humidity in May: 47%

The month with the highest relative humidity is January (70%).
The month with the lowest relative humidity is July (32%).

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Average rainfall in May
Merced, CA

Average rainfall in May - Merced, CA
  • Average rainfall in May: 0.75"

The wettest month (with the highest rainfall) is March (2.44").
The driest month (with the least rainfall) is August (0.04").

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Average rainfall days in May
Merced, CA

Average rainfall days in May - Merced, CA
  • Average rainfall days in May: 4.9 days

The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is June (1.1 days).

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

Average daylight in May / Average sunshine in May - Merced, 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: 11.3h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6.1h).

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Average sunshine days in May
Merced, CA

Average sunshine days in May - Merced, CA
  • Average sunshine days in May: 25.4 days

The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is March (18.8 days).

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Average UV index in May
Merced, CA

Average UV index in May - Merced, CA
  • Average UV index in May: 6

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

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Average cloud cover in May
Merced, CA

Average cloud cover in May - Merced, CA
  • Average cloud cover in May: 17

The month with the most cloud cover is March (Cloud cover 32).
Months with the least cloud cover are July and August (Cloud cover 5).

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Average visibility in May
Merced, CA

Average visibility in May - Merced, 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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