May weather forecast
Rancho Cucamonga, CA

Weather in May

The last month of the spring, May, is a warm month in Rancho Cucamonga, California, with an average temperature fluctuating between 53.6°F (12°C) and 76.6°F (24.8°C).

Temperature

In Rancho Cucamonga, the average high-temperature in May is almost the same as in April - a warm 76.6°F (24.8°C). In Rancho Cucamonga, the average low-temperature is 53.6°F (12°C).

Humidity

February, March and May, with an average relative humidity of 53%, are the most humid months in Rancho Cucamonga.

Rainfall

In Rancho Cucamonga, during 3.2 rainfall days, 0.2" (5mm) of precipitation is typically accumulated. In Rancho Cucamonga, during the entire year, the rain falls for 42.3 days and collects up to 4.53" (115mm) of precipitation.

Snowfall

January, March through December are months without snowfall in Rancho Cucamonga.

Daylight

The average length of the day in May is 13h and 57min.
On the first day of May, sunrise is at 6:00 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 7:56 pm PDT.

Sunshine

In Rancho Cucamonga, the average sunshine in May is 11.8h.

UV index

The average daily maximum UV index in May in Rancho Cucamonga is 6. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the average person.
Note: The daily maximum UV index of 6 in May interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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 are the most humid months in Rancho Cucamonga?

The months with the highest humidity are February, March and May, with an average relative humidity of 53%.

What is the average humidity in May in Rancho Cucamonga?

In Rancho Cucamonga, the average relative humidity in May is 53%.

How much does it rain in Rancho Cucamonga in May?

In Rancho Cucamonga, California, in May, during 3.2 rainfall days, 0.2" (5mm) of precipitation is typically accumulated.

When it does not snow in Rancho Cucamonga?

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

How many hours of daylight does Rancho Cucamonga have in May?

In May, the average day length is 13h and 57min.

What time are sunrise and sunset in May in Rancho Cucamonga?

In May, on the first day of the month, sunrise is at 6:00 am and sunset at 7:34 pm. On the last day of the month, in Rancho Cucamonga, California, sunrise is at 5:40 am and sunset at 7:56 pm PDT.

How many hours of sunshine does Rancho Cucamonga have in May?

The average sunshine duration in May is 11.8h.

What is the UV index intensity in May in Rancho Cucamonga?

In Rancho Cucamonga, California, the average daily maximum UV index in May is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Rancho Cucamonga, CA

Average temperature in May - Rancho Cucamonga, CA
  • Average high temperature in May: 76.6°F

The warmest month (with the highest average high temperature) is August (91.8°F).
The month with the lowest average high temperature is December (61.7°F).

  • Average low temperature in May: 53.6°F

The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (45.3°F).

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Average pressure in May
Rancho Cucamonga, CA

Average pressure in May - Rancho Cucamonga, CA
  • Average pressure in May: 29.9"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in May
Rancho Cucamonga, CA

Average wind speed in May - Rancho Cucamonga, CA
  • Average wind speed in May: 5.9mph

The windiest month (with the highest average wind speed) is May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity in May
Rancho Cucamonga, CA

Average humidity in May - Rancho Cucamonga, CA
  • Average humidity in May: 53%

The months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).

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Average rainfall in May
Rancho Cucamonga, CA

Average rainfall in May - Rancho Cucamonga, CA
  • Average rainfall in May: 0.2"

The wettest month (with the highest rainfall) is February (0.98").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in May
Rancho Cucamonga, CA

Average rainfall days in May - Rancho Cucamonga, CA
  • Average rainfall days in May: 3.2 days

The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.9 days).

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Average snowfall days in May
Rancho Cucamonga, CA

Average snowfall days in May - Rancho Cucamonga, CA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (0.1 days).
The 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
Rancho Cucamonga, CA

Average daylight in May / Average sunshine in May - Rancho Cucamonga, CA
  • Average daylight in May: 13h and 57min

The month with the longest days is June (Average daylight: 14h and 23min).
The month with the shortest days is December (Average daylight: 9h and 56min).

  • Average sunshine in May: 11h and 48min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).

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Average sunshine days in May
Rancho Cucamonga, CA

Average sunshine days in May - Rancho Cucamonga, CA
  • Average sunshine days in May: 26.2 days

The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (22.8 days).

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Average UV index in May
Rancho Cucamonga, CA

Average UV index in May - Rancho Cucamonga, CA
  • Average UV index in May: 6

The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in May
Rancho Cucamonga, CA

Average cloud cover in May - Rancho Cucamonga, CA
  • Average cloud cover in May: 12

The months with the most cloud cover are February and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in May
Rancho Cucamonga, CA

Average visibility in May - Rancho Cucamonga, 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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