Climate and monthly weather forecast
Bethel Island, CA

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Weather in January

January in Bethel Island, California, is a refreshing winter month, with an average temperature ranging between max 56.1°F (13.4°C) and min 41.5°F (5.3°C). In January, Bethel Island experiences a minor shift in meteorological conditions with average high-temperatures marked at a mild 56.1°F (13.4°C), closely mirroring the climate in December. Weather in January »

Weather in February

The last month of the winter, February, is another refreshing month in Bethel Island, California, with an average temperature ranging between min 42.4°F (5.8°C) and max 59.7°F (15.4°C). The unfolding of February shows an average high-temperature of a still mild 59.7°F (15.4°C), indicating a slight variance from January's 56.1°F (13.4°C). Weather in February »

Weather in March

March, the first month of the spring in Bethel Island, is a comfortable month, with temperature in the range of an average low of 43.9°F (6.6°C) and an average high of 63.5°F (17.5°C). As February transitions into March, Bethel Island records an average high-temperature of an enjoyable 63.5°F (17.5°C), showing a gentle shift from the preceding month. Weather in March »

Weather in April

April in Bethel Island, California, is a pleasant spring month, with an average temperature ranging between min 46.6°F (8.1°C) and max 69.4°F (20.8°C). Bethel Island in April experiences a slight uptick in the average high-temperature, adjusting from March's refreshing 63.5°F (17.5°C) to an agreeable 69.4°F (20.8°C). Weather in April »

Weather in May

May, the last month of the spring in Bethel Island, is a moderately hot month, with an average temperature ranging between min 50.5°F (10.3°C) and max 75.6°F (24.2°C). As Bethel Island transitions into May, the average high-temperature is observed to slightly rise from an agreeable 69.4°F (20.8°C) in April to a warm 75.6°F (24.2°C). Weather in May »

Weather in June

The first month of the summer, June, is still a warm month in Bethel Island, California, with an average temperature varying between 55°F (12.8°C) and 84.4°F (29.1°C). Bethel Island's June weather indicates a minor increase in high-temperatures, edging from May's warm 75.6°F (24.2°C) to a still moderately hot 84.4°F (29.1°C). Weather in June »

Weather in July

July is a tropical summer month in Bethel Island, California, with temperature in the range of an average high of 88.5°F (31.4°C) and an average low of 56.5°F (13.6°C). With average temperatures fluctuating between a high of 88.5°F (31.4°C) and a low of 56.5°F (13.6°C), July stands out as the warmest month. July's heat index is computed to be a hot 93.2°F (34°C). Weather in July »

Weather in August

The last month of the summer, August, is another hot month in Bethel Island, California, with an average temperature fluctuating between 87.4°F (30.8°C) and 57.4°F (14.1°C). With the start of August, Bethel Island measures an average high-temperature of a still tropical 87.4°F (30.8°C), not significantly differing from July's 88.5°F (31.4°C). Weather in August »

Weather in September

September, the first month of the autumn in Bethel Island, is still a warm month, with an average temperature varying between 57.7°F (14.3°C) and 85.3°F (29.6°C). The advent of September denotes an average high-temperature of a moderately hot 85.3°F (29.6°C), subtly different from August's 87.4°F (30.8°C). Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Bethel Island, California, with an average temperature varying between 54°F (12.2°C) and 75.9°F (24.4°C). Welcoming October, Bethel Island observes a shift in the average high-temperature, falling from September's 85.3°F (29.6°C) to a still warm 75.9°F (24.4°C). Weather in October »

Weather in November

November, the last month of the autumn in Bethel Island, is another refreshing month, with an average temperature varying between 63.9°F (17.7°C) and 46.6°F (8.1°C). The start of November comes with a reduction in the average high-temperature, receding from a warm 75.9°F (24.4°C) in October to a refreshing 63.9°F (17.7°C). Weather in November »

Weather in December

December, the first month of the winter in Bethel Island, is still a cool month, with an average temperature ranging between max 55°F (12.8°C) and min 41.7°F (5.4°C). December proves to be the coldest month, recording an average maximum temperature of 55°F (12.8°C) and a minimum temperature of 41.7°F (5.4°C). Weather in December »

Frequently asked questions

What is the most humid month in Bethel Island?

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

How much does it rain?

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

When it does not snow?

January through November are months without snowfall.

How many days does it snow?

Throughout the year, there are 0.1 snowfall days.

What are the months with the lowest UV index?

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

What is the wettest month?

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 is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.

When are the longest days?

The month with the longest days is June, with an average of 14h and 48min of daylight.

When is the highest UV index?

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

What time of the year is the hottest?

In Bethel Island, the average highest temperatures are observed in July, with a high of 88.5°F (31.4°C) and a low of 56.5°F (13.6°C).

What is the driest month?

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?

July has the most sunshine of the year, with an average of 12.1h of sunshine.

What is the least humid month?

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

What is the coldest month?

In Bethel Island, California, the lowest temperatures are generally noted in December, averaging a high of 55°F (12.8°C) and a low of 41.7°F (5.4°C).

When does it snow in Bethel Island?

The only month with snowfall is December.

What is the snowiest month?

December has the most snowfall days of the year. Snow falls for 0.1 days.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 36min of daylight.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5.8h of sunshine.

Average temperature
Bethel Island, CA

Average temperature - Bethel Island, CA

The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is December (55°F).

The month with the highest average low temperature is September (57.7°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

Average pressure
Bethel Island, CA

Average pressure - Bethel Island, CA

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed
Bethel Island, CA

Average wind speed - Bethel Island, CA

The windiest month (with the highest average wind speed) is June (7.8mph).
The calmest months (with the lowest average wind speed) are January and November (4.5mph).

Average humidity
Bethel Island, CA

Average humidity - Bethel Island, CA

The month with the highest relative humidity is January (74%).
The month with the lowest relative humidity is September (52%).

Average rainfall
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 rainfall days - Bethel Island, CA

The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (0.8 days).

Average snowfall days
Bethel Island, CA

Average snowfall days - Bethel Island, CA

The month with the highest number of snowfall days is December (0.1 days).
The 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

Average daylight / Average sunshine - Bethel Island, CA

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

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 48min).

Average sunshine days
Bethel Island, CA

Average sunshine days - Bethel Island, CA

The month with the most sunshine days is August (29.8 days).
The month with the least sunshine days is March (17.7 days).

Average UV index
Bethel Island, CA

Average UV index - Bethel Island, CA

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 visibility
Bethel Island, CA

Average visibility - Bethel Island, CA

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).

Bethel Island, California, USA

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