Bethel Island
California, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Bethel Island, CA

January is a moderate winter month in Bethel Island, California, with average temperature fluctuating between 41.5°F (5.3°C) and 56.1°F (13.4°C). In January, the average high-temperature is essentially the same as in December - a mild 56.1°F (13.4°C). Weather in January »

February, the last month of the winter, in Bethel Island, is another mild month, with temperature in the range of an average low of 42.4°F (5.8°C) and an average high of 59.7°F (15.4°C). In February, the average high-temperature is almost the same as in January - a still moderate 59.7°F (15.4°C). Weather in February »

March, the first month of the spring, in Bethel Island, is a comfortable month, with average temperature varying between 43.9°F (6.6°C) and 63.5°F (17.5°C). In March, the average high-temperature is almost the same as in February - an enjoyable 63.5°F (17.5°C). Weather in March »

April is an agreeable spring month in Bethel Island, California, with temperature in the range of an average low of 46.6°F (8.1°C) and an average high of 69.4°F (20.8°C). In Bethel Island, the average high-temperature slightly increases, from an enjoyable 63.5°F (17.5°C) in March, to a pleasant 69.4°F (20.8°C). Weather in April »

The last month of the spring, May, is a moderately hot month in Bethel Island, California, with average temperature ranging between max 75.6°F (24.2°C) and min 50.5°F (10.3°C). In Bethel Island, the average high-temperature in May marginally rises, from a pleasant 69.4°F (20.8°C) in April, to a warm 75.6°F (24.2°C). Weather in May »

June, the first month of the summer, in Bethel Island, is still a warm month, with average temperature fluctuating between 55°F (12.8°C) and 84.4°F (29.1°C). In June, the average high-temperature marginally rises, from a warm 75.6°F (24.2°C) in May, to a still moderately hot 84.4°F (29.1°C). Weather in June »

July in Bethel Island, California, is a tropical summer month, with average temperature fluctuating between 88.5°F (31.4°C) and 56.5°F (13.6°C). July is the warmest month, with an average high-temperature of 88.5°F (31.4°C) and an average low-temperature of 56.5°F (13.6°C). The average heat index in July is appraised at a hot 93.2°F (34°C). Weather in July »

The last month of the summer, August, is another hot month in Bethel Island, California, with average temperature ranging between max 87.4°F (30.8°C) and min 57.4°F (14.1°C). In Bethel Island, the average high-temperature is practically the same as in July - a still hot 87.4°F (30.8°C). Weather in August »

The first month of the autumn, September, is still a warm month in Bethel Island, California, with temperature in the range of an average low of 57.7°F (14.3°C) and an average high of 85.3°F (29.6°C). In Bethel Island, California, the average high-temperature in September is practically the same as in August - a warm 85.3°F (29.6°C). Weather in September »

October, the same as September, is another warm autumn month in Bethel Island, California, with average temperature ranging between max 75.9°F (24.4°C) and min 54°F (12.2°C). In Bethel Island, the average high-temperature in October decreases, from 85.3°F (29.6°C) in September, to a still warm 75.9°F (24.4°C). Weather in October »

November, the last month of the autumn, in Bethel Island, is another comfortable month, with average temperature ranging between max 63.9°F (17.7°C) and min 46.6°F (8.1°C). In Bethel Island, the average high-temperature in November decreases, from a moderately hot 75.9°F (24.4°C) in October, to an enjoyable 63.9°F (17.7°C). Weather in November »

December, the first month of the winter, in Bethel Island, is also a fresh month, with average temperature fluctuating between 55°F (12.8°C) and 41.7°F (5.4°C). With an average high-temperature of 55°F (12.8°C) and an average low-temperature of 41.7°F (5.4°C), December is the coldest month. Weather in December »

What is the most humid month in Bethel Island?

With an average relative humidity of 74%, January is the most humid month in Bethel Island, California.

How many days does it rain in Bethel Island?

Throughout the year, there are 62 rainfall days, and 10.16" (258mm) of precipitation is accumulated.

How many days does it snow in Bethel Island?

In Bethel Island, California, during the entire year, snow falls for 0.1 days.

When it does not snow in Bethel Island?

January through November are months without snowfall.

What are the months with the lowest UV index in Bethel Island?

Months with the lowest UV index in Bethel Island, California, are January, February, November and December, with an average maximum UV index of 3.

What is the rainiest month in Bethel Island?

The month with the most rainfall is February when the rain falls for 7.8 days and typically aggregates up to 2.09" (53mm) of precipitation.

When are the longest days in Bethel Island?

The month with the longest days is June, with an average of 14.8h of daylight.

When is the highest UV index in Bethel Island?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Bethel Island.

What is the warmest month in Bethel Island?

July is the warmest month, with an average high-temperature of 88.5°F (31.4°C) and an average low-temperature of 56.5°F (13.6°C).

What is the driest month in Bethel Island?

July and August are months with the least rain when the rain falls for 1.3 days and typically aggregates up to 0.04" (1mm) of rain.

What month has the most sunshine in Bethel Island?

July has the most sunshine of the year in Bethel Island, California, with an average of 12.1h of sunshine.

What is the least humid month in Bethel Island?

With an average relative humidity of 52%, September is the least humid month.

What is the coldest month in Bethel Island?

December is the coldest month, with an average high-temperature of 55°F (12.8°C) and an average low-temperature of 41.7°F (5.4°C).

When does it snow in Bethel Island?

The only month with snowfall is December.

When does it snow the most in Bethel Island?

December has the most snowfall days of the year in Bethel Island, California. Snow falls for 0.1 days.

What is the month with the shortest days in Bethel Island?

With an average of 9.6h of daylight, December has the shortest days of the year in Bethel Island, California.

What is the month with the least sunshine in Bethel Island?

With an average of 5.8h of sunshine, December has the least sunshine of the year in Bethel Island, California.
Average temperature - Bethel Island, CA
Average humidity - Bethel Island, CA
Average rainfall - Bethel Island, CA

The wettest month (with the highest rainfall) is February (2.09").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days - Bethel Island, CA
Average snowfall days - Bethel Island, CA

The month with the highest number of snowfall days is December (0.1 days).
Months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

Average daylight / Average sunshine - Bethel Island, CA

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.8h).

Average UV index - Bethel Island, CA