Climate and monthly weather forecastBethel Island, CA
Climate and monthly weather forecast
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 »Updated: Aug 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The most humid month in Bethel Island, California, is January, with an average relative humidity of 74%.
Throughout the year, there are 62 rainfall days, and 10.16" (258mm) of precipitation is accumulated.
January through November are months without snowfall.
Throughout the year, there are 0.1 snowfall days.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3.
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.
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.
The month with the longest days is June, with an average of 14h and 48min of daylight.
The months with the highest UV index in Bethel Island are June through August, with an average maximum UV index of 6.
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).
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.
July has the most sunshine of the year, with an average of 12.1h of sunshine.
September is the least humid month, with an average relative humidity of 52%.
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).
The only month with snowfall is December.
December has the most snowfall days of the year. Snow falls for 0.1 days.
The month with the shortest days is December, with an average of 9h and 36min of daylight.
The month with the least sunshine is December, with an average of 5.8h of sunshine.
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 in January:
30.14"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.92"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.11"Hg
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 in January:
4.5mph - Average wind speed in February:
5.7mph - Average wind speed in March:
6mph - Average wind speed in April:
6.8mph - Average wind speed in May:
7.6mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
7.5mph - Average wind speed in August:
7mph - Average wind speed in September:
6.2mph - Average wind speed in October:
5.5mph - Average wind speed in November:
4.5mph - Average wind speed in December:
5mph
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
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 in January:
1.89" - Average rainfall in February:
2.09" - Average rainfall in March:
1.77" - Average rainfall in April:
0.55" - Average rainfall in May:
0.43" - Average rainfall in June:
0.08"
- Average rainfall in July:
0.04" - Average rainfall in August:
0.04" - Average rainfall in September:
0.08" - Average rainfall in October:
0.51" - Average rainfall in November:
1.1" - Average rainfall in December:
1.57"
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 in January:
8.6 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
6.3 days - Average rainfall days in May:
4 days - Average rainfall days in June:
1.3 days
- Average rainfall days in July:
1.3 days - Average rainfall days in August:
0.8 days - Average rainfall days in September:
1.3 days - Average rainfall days in October:
3.3 days - Average rainfall days in November:
5.7 days - Average rainfall days in December:
9.3 days
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 in January:
0 days - Average snowfall days in February:
0 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0.1 days
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 in January:
9h and 54min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 12min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 30min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 36min
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).
- Average sunshine in January:
6h and 0min - Average sunshine in February:
6h and 6min - Average sunshine in March:
7h and 54min - Average sunshine in April:
10h and 18min - Average sunshine in May:
11h and 12min - Average sunshine in June:
11h and 48min
- Average sunshine in July:
12h and 6min - Average sunshine in August:
11h and 54min - Average sunshine in September:
11h and 12min - Average sunshine in October:
7h and 12min - Average sunshine in November:
6h and 36min - Average sunshine in December:
5h and 48min
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 in January:
21.8 days - Average sunshine days in February:
19.8 days - Average sunshine days in March:
17.7 days - Average sunshine days in April:
22.8 days - Average sunshine days in May:
26.6 days - Average sunshine days in June:
28.5 days
- Average sunshine days in July:
29.7 days - Average sunshine days in August:
29.8 days - Average sunshine days in September:
28.5 days - Average sunshine days in October:
26.9 days - Average sunshine days in November:
23.7 days - Average sunshine days in December:
21.1 days
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
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 cloud cover
Bethel Island, CA
The months with the most cloud cover are March and December (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 5).
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).
