May weather forecast
O'Brien, CA

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Weather in May

The last month of the spring, May, is a pleasant month in O'Brien, California, with an average temperature varying between 71.2°F (21.8°C) and 46°F (7.8°C).

Temperature

O'Brien perceives a slight temperature ascent during May, with average high-temperatures adjusting from a refreshing 62.4°F (16.9°C) in April to an agreeable 71.2°F (21.8°C). A noticeable downturn in temperature characterizes the May nights, averaging at a frosty 46°F (7.8°C).

Humidity

In O'Brien, the average relative humidity in May is 58%.

Rainfall

In May, in O'Brien, the rain falls for 10.3 days. Throughout May, 1.89" (48mm) of precipitation is accumulated. Throughout the year, there are 102.3 rainfall days, and 24.21" (615mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall in O'Brien.

Daylight

The average length of the day in May in O'Brien is 14h and 29min.
On the first day of the month, sunrise is at 6:06 am and sunset at 8:06 pm. On the last day of May, in O'Brien, California, sunrise is at 5:39 am and sunset at 8:34 pm PDT.

Sunshine

In May, the average sunshine is 11h.

UV index

The average daily maximum UV index in May in O'Brien is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In May, the maximum UV index of 5 transforms into these recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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Frequently asked questions

What is the average May temperature in O'Brien?

May temperatures vary between a high-temperature of 71.2°F (21.8°C) and a low-temperature of 46°F (7.8°C).

What is the average humidity in May in O'Brien?

The average relative humidity in May in O'Brien, California, is 58%.

How many days does it rain in May in O'Brien?

In O'Brien, California, in May, during 10.3 rainfall days, 1.89" (48mm) of precipitation is typically accumulated.

When it does not snow in O'Brien?

In O'Brien, snow does not fall in April through October.

What is the average length of the day in May in O'Brien?

In May, the average day length in O'Brien, California, is 14h and 29min.

What time are sunrise and sunset in May in O'Brien?

On the first day of May in O'Brien, sunrise is at 6:06 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:34 pm PDT.

How long on average sun shines in May in O'Brien?

The average sunshine duration in May in O'Brien is 11h.

What is the UV index reading in May in O'Brien?

In O'Brien, California, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
O'Brien, CA

Average temperature in May - O
  • Average high temperature in May: 71.2°F

The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is December (47.8°F).

  • Average low temperature in May: 46°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is December (33.6°F).

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Average pressure in May
O'Brien, CA

Average pressure in May - O
  • Average pressure in May: 29.96"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).

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Average wind speed in May
O'Brien, CA

Average wind speed in May - O
  • Average wind speed in May: 5.1mph

The windiest months (with the highest average wind speed) are March and October (5.3mph).
The calmest months (with the lowest average wind speed) are August and November (4.5mph).

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Average humidity in May
O'Brien, CA

Average humidity in May - O
  • Average humidity in May: 58%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is August (37%).

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Average rainfall in May
O'Brien, CA

Average rainfall in May - O
  • Average rainfall in May: 1.89"

The wettest month (with the highest rainfall) is March (4.8").
The driest month (with the least rainfall) is July (0.12").

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Average rainfall days in May
O'Brien, CA

Average rainfall days in May - O
  • Average rainfall days in May: 10.3 days

The month with the highest number of rainy days is March (16.8 days).
The month with the least rainy days is August (1.7 days).

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Average snowfall in May
O'Brien, CA

Average snowfall in May - O
  • Average snowfall in May: 0"

The month with the highest snowfall is November (1.3").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in May
O'Brien, CA

Average snowfall days in May - O
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in May /
Average sunshine in May
O'Brien, CA

Average daylight in May / Average sunshine in May - O
  • Average daylight in May: 14h and 3min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in May: 11h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

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Average sunshine days in May
O'Brien, CA

Average sunshine days in May - O
  • Average sunshine days in May: 18.3 days

The month with the most sunshine days is August (27.1 days).
The month with the least sunshine days is March (11.8 days).

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Average UV index in May
O'Brien, CA

Average UV index in May - O
  • Average UV index in May: 5

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are February, November and December (UV index 2).

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Average cloud cover in May
O'Brien, CA

Average cloud cover in May - O
  • Average cloud cover in May: 23

The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in May
O'Brien, CA

Average visibility in May - O
  • Average visibility in May: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is December (5mi).

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O'Brien, California, USA

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