May weather forecast
Castella, CA

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Weather in May

The last month of the spring, May, is a comfortable month in Castella, California, with an average temperature ranging between min 38.8°F (3.8°C) and max 65.1°F (18.4°C).

Temperature

A slight uplift in the average high-temperature marks May, adjusting from April's mild 56.1°F (13.4°C) to an enjoyable 65.1°F (18.4°C). Castella receives a consistent average low-temperature of 38.8°F (3.8°C) in May, a substantial dip from the day's heat.

Humidity

In Castella, the average relative humidity in May is 64%.

Rainfall

In Castella, in May, during 11.3 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. Throughout the year, in Castella, there are 113.4 rainfall days, and 31.3" (795mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Castella are January through May, October through December. May is the last month it regularly snows in Castella. During 0.3 snowfall days, in May, Castella aggregates 0.04" (1mm) of snow. In Castella, during the entire year, snow falls for 28.7 days and aggregates up to 45.51" (1156mm) of snow.

Daylight

In Castella, the average length of the day in May is 14h and 31min.
On the first day of the month, sunrise is at 6:05 am and sunset at 8:06 pm. On the last day of May, in Castella, sunrise is at 5:38 am and sunset at 8:35 pm PDT.

Sunshine

In May, the average sunshine in Castella is 10.9h.

UV index

In May, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index of 4 in May converts into the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Updated: Feb 9, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What is the temperature in May in Castella?

In May, in Castella, the average high-temperature is 65.1°F (18.4°C), and the average low-temperature is 38.8°F (3.8°C).

What is the average humidity in May in Castella?

In May, the average relative humidity in Castella, California, is 64%.

How much does it rain in Castella in May?

In Castella, California, in May, it is raining for 11.3 days, with typically 2.17" (55mm) of accumulated precipitation.

What is the last month it snows in Castella?

May is the last month it regularly snows in Castella, California. During 0.3 snowfall days, in May, Castella aggregates 0.04" (1mm) of snow.

How many hours of daylight does Castella have in May?

In Castella, California, the average day length in May is 14h and 31min.

What time are sunrise and sunset in May in Castella?

In May, on the first day of the month, sunrise is at 6:05 am and sunset at 8:06 pm. On the last day of the month, in Castella, California, sunrise is at 5:38 am and sunset at 8:35 pm PDT.

How long on average sun shines in May in Castella?

In May, the average sunshine duration is 10.9h.

What is the UV index intensity in May in Castella?

In Castella, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Castella, CA

Average temperature in May - Castella, CA
  • Average high temperature in May: 65.1°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is December (41°F).

  • Average low temperature in May: 38.8°F

The months with the highest average low temperature are July and August (51.4°F).
The coldest month (with the lowest average low temperature) is December (26.8°F).

Average pressure in May
Castella, CA

Average pressure in May - Castella, CA
  • Average pressure in May: 29.97"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).

Average wind speed in May
Castella, CA

Average wind speed in May - Castella, CA
  • Average wind speed in May: 5mph

The windiest month (with the highest average wind speed) is March (5.7mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

Average humidity in May
Castella, CA

Average humidity in May - Castella, CA
  • Average humidity in May: 64%

The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is August (44%).

Average rainfall in May
Castella, CA

Average rainfall in May - Castella, CA
  • Average rainfall in May: 2.17"

The wettest month (with the highest rainfall) is March (5.55").
The driest month (with the least rainfall) is July (0.24").

Average rainfall days in May
Castella, CA

Average rainfall days in May - Castella, CA
  • Average rainfall days in May: 11.3 days

The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (2.7 days).

Average snowfall in May
Castella, CA

Average snowfall in May - Castella, CA
  • Average snowfall in May: 0.04"

The month with the highest snowfall is January (12.6").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in May
Castella, CA

Average snowfall days in May - Castella, CA
  • Average snowfall days in May: 0.3 days

The month with the highest number of snowfall days is December (6.4 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in May / Average sunshine in May - Castella, CA
  • 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: 10h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

Average sunshine days in May
Castella, CA

Average sunshine days in May - Castella, CA
  • Average sunshine days in May: 17.3 days

The month with the most sunshine days is August (25.7 days).
The month with the least sunshine days is March (11.1 days).

Average UV index in May
Castella, CA

Average UV index in May - Castella, CA
  • Average UV index in May: 4

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in May
Castella, CA

Average cloud cover in May - Castella, CA
  • Average cloud cover in May: 26

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 6).

Average visibility in May
Castella, CA

Average visibility in May - Castella, CA
  • Average visibility in May: 6mi

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

Castella, California, USA

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