Monthly weather forecast and climate
Castroville, CA

Weather in January

January, like December, is a moderate winter month in Castroville, California, with average temperature fluctuating between 44.6°F (7°C) and 59.2°F (15.1°C). In Castroville, the average high-temperature is relatively the same as in December - a still mild 59.2°F (15.1°C). Weather in January »

Weather in February

The last month of the winter, February, is another mild month in Castroville, California, with average temperature ranging between min 44.1°F (6.7°C) and max 59.4°F (15.2°C). In February, the average high-temperature is essentially the same as in January - a still moderate 59.4°F (15.2°C). Weather in February »

Weather in March

The first month of the spring, March, is a comfortable month in Castroville, California, with average temperature ranging between min 44.1°F (6.7°C) and max 61.3°F (16.3°C). In Castroville, the average high-temperature is almost the same as in February - an enjoyable 61.3°F (16.3°C). Weather in March »

Weather in April

April, like March, in Castroville, California, is another enjoyable spring month, with temperature in the range of an average high of 64°F (17.8°C) and an average low of 45.1°F (7.3°C). In April, the average high-temperature is almost the same as in March - a still comfortable 64°F (17.8°C). Weather in April »

Weather in May

May, the last month of the spring, in Castroville, is also an enjoyable month, with average temperature ranging between max 67.3°F (19.6°C) and min 48.4°F (9.1°C). In Castroville, California, the average high-temperature is almost the same as in April - a still enjoyable 67.3°F (19.6°C). Weather in May »

Weather in June

The first month of the summer, June, is a pleasant month in Castroville, California, with average temperature varying between 51.4°F (10.8°C) and 72.5°F (22.5°C). In Castroville, California, the average high-temperature is almost the same as in May - a pleasant 72.5°F (22.5°C). Weather in June »

Weather in July

July is a moderately hot summer month in Castroville, California, with temperature in the range of an average low of 53.8°F (12.1°C) and an average high of 75.9°F (24.4°C). In Castroville, California, the average high-temperature is essentially the same as in June - a moderately hot 75.9°F (24.4°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Castroville, California, with average temperature varying between 76.6°F (24.8°C) and 54.3°F (12.4°C). The warmest month is August, with an average high-temperature of 76.6°F (24.8°C) and an average low-temperature of 54.3°F (12.4°C). Weather in August »

Weather in September

September, the first month of the autumn, in Castroville, is also a moderately hot month, with temperature in the range of an average low of 54.5°F (12.5°C) and an average high of 76.5°F (24.7°C). In September, the average high-temperature is practically the same as in August - a still moderately hot 76.5°F (24.7°C). Weather in September »

Weather in October

October, the same as September, in Castroville, California, is an agreeable autumn month, with average temperature fluctuating between 70.7°F (21.5°C) and 52.3°F (11.3°C). In Castroville, the average high-temperature marginally drops, from a warm 76.5°F (24.7°C) in September, to a pleasant 70.7°F (21.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an enjoyable month in Castroville, California, with average temperature fluctuating between 63.7°F (17.6°C) and 47.7°F (8.7°C). In November, the average high-temperature slightly decreases, from an agreeable 70.7°F (21.5°C) in October, to an enjoyable 63.7°F (17.6°C). Weather in November »

Weather in December

The first month of the winter, December, is still a mild month in Castroville, California, with average temperature ranging between max 57.6°F (14.2°C) and min 43.7°F (6.5°C). The coldest month is December, with an average high-temperature of 57.6°F (14.2°C) and an average low-temperature of 43.7°F (6.5°C). Weather in December »
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FAQ

How much does it rain in Castroville?

Throughout the year, in Castroville, California, there are 53.1 rainfall days, and 5.35" (136mm) of precipitation is accumulated.

When is the lowest UV index in Castroville?

Months with the lowest UV index are February, November and December, with an average maximum UV index of 3.

What is the most humid month in Castroville?

The most humid month in Castroville, California, is March, with an average relative humidity of 75%.

What is the driest month in Castroville?

June through September are months with the least rain in Castroville, California, when the rain falls for 1.1 days and typically aggregates up to 0.04" (1mm) of rain.

When are the longest days in Castroville?

June has the longest days of the year in Castroville, California, with an average of 14.7h of daylight.

When is the highest UV index in Castroville?

Months with the highest UV index are June through September, with an average maximum UV index of 5.

What is the month with the most sunshine in Castroville?

July and August, with an average of 12h of sunshine, are months with the most sunshine in Castroville, California.

What is the warmest month in Castroville?

The warmest month is August, with an average high-temperature of 76.6°F (24.8°C) and an average low-temperature of 54.3°F (12.4°C).

What is the least humid month in Castroville?

October is the least humid month in Castroville, with an average relative humidity of 66%.

What is the coldest month in Castroville?

December is the coldest month, with an average high-temperature of 57.6°F (14.2°C) and an average low-temperature of 43.7°F (6.5°C).

What is the wettest month in Castroville?

The month with the most rainfall in Castroville, California, is December when the rain falls for 7.7 days and typically aggregates up to 1.14" (29mm) of precipitation.

What is the month with the shortest days in Castroville?

The month with the shortest days in Castroville, California, is December, with an average of 9.7h of daylight.

What is the month with the least sunshine in Castroville?

With an average of 6h of sunshine, December has the least sunshine of the year in Castroville, California.

Average temperature
Castroville, CA

Average temperature - Castroville, CA

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).

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
Castroville, CA

Average pressure - Castroville, CA

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

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Average wind speed
Castroville, CA

Average wind speed - Castroville, CA

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 rainfall
Castroville, CA

Average rainfall - Castroville, CA

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
Castroville, CA

Average rainfall days - Castroville, CA

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 / Average sunshine
Castroville, CA

Average daylight / Average sunshine - Castroville, CA

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.7h).

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
Castroville, CA

Average sunshine days - Castroville, CA

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
Castroville, CA

Average UV index - Castroville, CA

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

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Average visibility
Castroville, CA

Average visibility - Castroville, CA

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

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