May weather forecast
Castroville, CA

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Weather in May

May, the last month of the spring in Castroville, is another refreshing month, with temperature in the range of an average low of 48.4°F (9.1°C) and an average high of 67.3°F (19.6°C).

Temperature

Castroville records an average high-temperature of a still enjoyable 67.3°F (19.6°C) in May, closely mirroring the climate of the previous month. An average low-temperature of 48.4°F (9.1°C) is observed during May nights.

Humidity

In May, the average relative humidity is 72%.

Rainfall

In Castroville, during May, the rain falls for 3.4 days and regularly aggregates up to 0.24" (6mm) of precipitation. In Castroville, during the entire year, the rain falls for 53.1 days and collects up to 5.35" (136mm) of precipitation.

Daylight

In May, the average length of the day in Castroville is 14h and 9min.
On the first day of May in Castroville, California, sunrise is at 6:11 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:20 pm PDT.

Sunshine

The average sunshine in May is 11h.

UV index

In May, the average daily maximum UV index in Castroville is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: In May, the maximum UV index of 4 translates into these guidelines:
Undertake protective steps - Preventing sun damage is advised. Around midday, solar radiation is most harmful; hence, exposure should be limited. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
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Frequently asked questions

What is the temperature in May in Castroville?

The average high-temperature, in May, in Castroville, is 67.3°F (19.6°C), while the average low-temperature is 48.4°F (9.1°C).

What is the average humidity in May in Castroville?

The average relative humidity in May in Castroville is 72%.

How much does it rain in Castroville in May?

In Castroville, California, during May, the rain falls for 3.4 days and regularly aggregates up to 0.24" (6mm) of precipitation.

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

In May, the average day length is 14h and 9min.

When is the sunrise / sunset in May in Castroville?

In May, on the first day of the month, sunrise is at 6:11 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:20 pm PDT.

How many hours of sunshine does Castroville have in May?

In May, the average sunshine duration in Castroville is 11h.

What is the UV index reading in May in Castroville?

The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Castroville, CA

Average temperature in May - Castroville, CA
  • Average high temperature in May: 67.3°F

The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (57.6°F).

  • Average low temperature in May: 48.4°F

The month with the highest average low temperature is September (54.5°F).
The coldest month (with the lowest average low temperature) is December (43.7°F).

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Average pressure in May
Castroville, CA

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

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

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Average wind speed in May
Castroville, CA

Average wind speed in May - Castroville, CA
  • Average wind speed in May: 6.5mph

The windiest month (with the highest average wind speed) is May (6.5mph).
The calmest month (with the lowest average wind speed) is September (4.9mph).

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Average humidity in May
Castroville, CA

Average humidity in May - Castroville, CA
  • Average humidity in May: 72%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (66%).

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Average rainfall in May
Castroville, CA

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

The wettest month (with the highest rainfall) is December (1.14").
The driest months (with the least rainfall) are June, July, August and September (0.04").

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Average rainfall days in May
Castroville, CA

Average rainfall days in May - Castroville, CA
  • Average rainfall days in May: 3.4 days

The month with the highest number of rainy days is March (10.2 days).
The month with the least rainy days is August (0.7 days).

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

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

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in May: 11h

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

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Average sunshine days in May
Castroville, CA

Average sunshine days in May - Castroville, CA
  • Average sunshine days in May: 26.3 days

The month with the most sunshine days is August (29.8 days).
The month with the least sunshine days is March (20 days).

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Average UV index in May
Castroville, CA

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

The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).

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Average cloud cover in May
Castroville, CA

Average cloud cover in May - Castroville, CA
  • Average cloud cover in May: 23

The month with the most cloud cover is March (Cloud cover 33).
The months with the least cloud cover are July and September (Cloud cover 10).

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Average visibility in May
Castroville, CA

Average visibility in May - Castroville, 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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Castroville, California, USA

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