May weather forecast and climate
Pomona, CA

Trails in the rural mountainous region of Pomona, California, with scenic slopes and dense population down below
Trails in the rural mountainous region of Pomona, California, with scenic slopes and dense population down below

Weather in May

The last month of the spring, May, is a warm month in Pomona, California, with average temperature ranging between max 76.3°F (24.6°C) and min 54°F (12.2°C).

Temperature

In May, the average high-temperature is almost the same as in April - a moderately hot 76.3°F (24.6°C). In May, in Pomona, the average low-temperature is 54°F (12.2°C).

Humidity

With an average relative humidity of 56%, May is the most humid month.

Rainfall

In Pomona, California, it is raining for 3.6 days, with typically 0.24" (6mm) of accumulated precipitation. In Pomona, during the entire year, the rain falls for 48 days and collects up to 7.52" (191mm) of precipitation.

Snowfall

In Pomona snow does not fall in January, March through December.

Daylight

The average length of the day in Pomona is 14h.

Sunshine

The average sunshine in Pomona is 11.6h.

UV index

In Pomona, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 Pomona?

In May, in Pomona, California, the average high-temperature is 76.3°F (24.6°C), and the average low-temperature is 54°F (12.2°C).

What is the most humid month in Pomona?

May is the most humid month, with an average relative humidity of 56%.

What is the average humidity in May in Pomona?

The average relative humidity in May in Pomona, California, is 56%.

How much does it rain in Pomona in May?

In Pomona, California, during May, the rain falls for 3.6 days and regularly aggregates up to 0.24" (6mm) of precipitation.

When it does not snow in Pomona?

In Pomona, California, snow does not fall in January, March through December.

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

In May, the average length of the day in Pomona, California, is 14h.

How many hours of sunshine does Pomona have in May?

In May, the average sunshine in Pomona, California, is 11.6h.

How high is the UV index in May in Pomona?

The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to the Sun's UV rays.

Average temperature in May
Pomona, CA

Average temperature in May - Pomona, CA
  • Average high temperature in May: 76.3°F

The warmest month (with the highest average high temperature) is August (90.1°F).
The month with the lowest average high temperature is December (63.1°F).

  • Average low temperature in May: 54°F

The month with the highest average low temperature is August (65.7°F).
The coldest months (with the lowest average low temperature) are February and December (46.8°F).

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Average pressure in May
Pomona, CA

Average pressure in May - Pomona, CA
  • Average pressure in May: 29.91"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.87").

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Average wind speed in May
Pomona, CA

Average wind speed in May - Pomona, CA
  • Average wind speed in May: 5.7mph

The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average humidity in May
Pomona, CA

Average humidity in May - Pomona, CA
  • Average humidity in May: 56%

The month with the highest relative humidity is May (56%).
Months with the lowest relative humidity are August and November (45%).

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Average rainfall in May
Pomona, CA

Average rainfall in May - Pomona, CA
  • Average rainfall in May: 0.24"

The wettest months (with the highest rainfall) are February and December (1.65").
The driest months (with the least rainfall) are June and August (0.04").

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Average rainfall days in May
Pomona, CA

Average rainfall days in May - Pomona, CA
  • Average rainfall days in May: 3.6 days

The month with the highest number of rainy days is March (7.6 days).
The month with the least rainy days is June (0.8 days).

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Average snowfall days in May
Pomona, CA

Average snowfall days in May - Pomona, CA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (0.1 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in May / Average sunshine in May - Pomona, CA
  • Average daylight in May: 14h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in May: 11.6h

The month with the most sunshine is July (Average sunshine: 12.2h).
Months with the least sunshine are February and December (Average sunshine: 6.9).

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Average sunshine days in May
Pomona, CA

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

The month with the most sunshine days is June (28.7 days).
The month with the least sunshine days is February (21.1 days).

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Average UV index in May
Pomona, CA

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

The month with the highest UV index is August (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 4).

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Average cloud cover in May
Pomona, CA

Average cloud cover in May - Pomona, CA
  • Average cloud cover in May: 14

Months with the most cloud cover are February, March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).

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Average visibility in May
Pomona, CA

Average visibility in May - Pomona, 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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