May weather forecast
Monte Sereno, CA

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Weather in May

The last month of the spring, May, is an agreeable month in Monte Sereno, California, with an average temperature ranging between max 69.6°F (20.9°C) and min 48.4°F (9.1°C).

Temperature

Monte Sereno measures an average high-temperature of a pleasant 69.6°F (20.9°C) in May, nearly consistent with the preceding month. In Monte Sereno, the nighttime temperature averages to a frosty 48.4°F (9.1°C) during May.

Humidity

The average relative humidity in May is 68%.

Rainfall

In Monte Sereno, in May, it is raining for 4.5 days, with typically 0.51" (13mm) of accumulated precipitation. In Monte Sereno, during the entire year, the rain falls for 68.6 days and collects up to 11.57" (294mm) of precipitation.

Daylight

In May, the average length of the day in Monte Sereno is 14h and 11min.
On the first day of May, sunrise is at 6:12 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:22 pm PDT.

Sunshine

In Monte Sereno, the average sunshine in May is 11h.

UV index

The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 5 during May translates into the following guidance:
Guard yourself - Avoiding sunburn is suggested. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are May temperatures in Monte Sereno?

The high-temperature, in May, in Monte Sereno, is 69.6°F (20.9°C), while the low-temperature averages to 48.4°F (9.1°C).

What is the average humidity in May in Monte Sereno?

The average relative humidity in May in Monte Sereno, California, is 68%.

How much does it rain in Monte Sereno in May?

In Monte Sereno, California, during May, the rain falls for 4.5 days and regularly aggregates up to 0.51" (13mm) of precipitation.

What is the average length of the day in May in Monte Sereno?

In Monte Sereno, the average day length in May is 14h and 11min.

When is the sunrise / sunset in May in Monte Sereno?

On the first day of May in Monte Sereno, sunrise is at 6:12 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:22 pm PDT.

How long on average sun shines in May in Monte Sereno?

The average sunshine duration in May in Monte Sereno is 11h.

What is the UV index reading in May in Monte Sereno?

In Monte Sereno, California, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium health risk 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
Monte Sereno, CA

Average temperature in May - Monte Sereno, CA
  • Average high temperature in May: 69.6°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is December (56.7°F).

  • Average low temperature in May: 48.4°F

The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is February (43.5°F).

Average pressure in May
Monte Sereno, CA

Average pressure in May - Monte Sereno, CA
  • Average pressure in May: 29.98"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June and September (29.92"Hg).

Average wind speed in May
Monte Sereno, CA

Average wind speed in May - Monte Sereno, CA
  • Average wind speed in May: 5.8mph

The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest months (with the lowest average wind speed) are August, September, October and November (4.5mph).

Average humidity in May
Monte Sereno, CA

Average humidity in May - Monte Sereno, CA
  • Average humidity in May: 68%

The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July and September (62%).

Average rainfall in May
Monte Sereno, CA

Average rainfall in May - Monte Sereno, CA
  • Average rainfall in May: 0.51"

The wettest month (with the highest rainfall) is February (2.2").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days in May
Monte Sereno, CA

Average rainfall days in May - Monte Sereno, CA
  • Average rainfall days in May: 4.5 days

The month with the highest number of rainy days is March (12.5 days).
The month with the least rainy days is August (0.9 days).

Average daylight in May /
Average sunshine in May
Monte Sereno, CA

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

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

  • Average sunshine in May: 11h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

Average sunshine days in May
Monte Sereno, CA

Average sunshine days in May - Monte Sereno, CA
  • Average sunshine days in May: 25.3 days

The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is March (17.3 days).

Average UV index in May
Monte Sereno, CA

Average UV index in May - Monte Sereno, CA
  • Average UV index in May: 5

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

Average cloud cover in May
Monte Sereno, CA

Average cloud cover in May - Monte Sereno, CA
  • Average cloud cover in May: 22

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 6).

Average visibility in May
Monte Sereno, CA

Average visibility in May - Monte Sereno, 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).

Monte Sereno, California, USA

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