Monthly weather forecast and climate
Halcyon, CA

Weather in January

January, like December, in Halcyon, California, is another enjoyable winter month, with average temperature fluctuating between 47.5°F (8.6°C) and 63°F (17.2°C). In January, the average high-temperature is essentially the same as in December - a still enjoyable 63°F (17.2°C). Weather in January »

Weather in February

February, the last month of the winter, in Halcyon, is also an enjoyable month, with average temperature fluctuating between 46°F (7.8°C) and 62.2°F (16.8°C). In February, the average high-temperature is relatively the same as in January - a still comfortable 62.2°F (16.8°C). Weather in February »

Weather in March

March, the first month of the spring, in Halcyon, is also an enjoyable month, with average temperature varying between 46.9°F (8.3°C) and 64.9°F (18.3°C). In Halcyon, the average high-temperature is essentially the same as in February - a still enjoyable 64.9°F (18.3°C). Weather in March »

Weather in April

April, the same as March, is another comfortable spring month in Halcyon, California, with average temperature ranging between min 48.6°F (9.2°C) and max 67.6°F (19.8°C). In April, the average high-temperature is practically the same as in March - a still enjoyable 67.6°F (19.8°C). Weather in April »

Weather in May

May, the last month of the spring, in Halcyon, is an agreeable month, with average temperature fluctuating between 51.4°F (10.8°C) and 70.5°F (21.4°C). In Halcyon, California, the average high-temperature in May is relatively the same as in April - a pleasant 70.5°F (21.4°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Halcyon, California, with temperature in the range of an average low of 55°F (12.8°C) and an average high of 75.4°F (24.1°C). In June, the average high-temperature is essentially the same as in May - a moderately hot 75.4°F (24.1°C). Weather in June »

Weather in July

July, like June, in Halcyon, California, is a moderately hot summer month, with average temperature varying between 58.5°F (14.7°C) and 78.6°F (25.9°C). In Halcyon, California, the average high-temperature in July is almost the same as in June - a still moderately hot 78.6°F (25.9°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Halcyon, California, with average temperature varying between 78.8°F (26°C) and 59.2°F (15.1°C). In Halcyon, the average high-temperature in August is practically the same as in July - a still moderately hot 78.8°F (26°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Halcyon, California, with average temperature ranging between max 79.5°F (26.4°C) and min 59.9°F (15.5°C). The warmest month is September, with an average high-temperature of 79.5°F (26.4°C) and an average low-temperature of 59.9°F (15.5°C). Weather in September »

Weather in October

October, like September, in Halcyon, California, is another warm autumn month, with average temperature varying between 74.3°F (23.5°C) and 56.7°F (13.7°C). In Halcyon, the average high-temperature is essentially the same as in September - a still warm 74.3°F (23.5°C). Weather in October »

Weather in November

November, the last month of the autumn, in Halcyon, is another comfortable month, with average temperature varying between 51.4°F (10.8°C) and 67.8°F (19.9°C). In November, the average high-temperature marginally drops, from a moderately hot 74.3°F (23.5°C) in October, to a comfortable 67.8°F (19.9°C). Weather in November »

Weather in December

The first month of the winter, December, is also an enjoyable month in Halcyon, California, with average temperature varying between 46.8°F (8.2°C) and 61.2°F (16.2°C). December is the coldest month, with an average high-temperature of 61.2°F (16.2°C) and an average low-temperature of 46.8°F (8.2°C). Weather in December »
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FAQ

How many days does it rain in Halcyon?

Throughout the year, there are 47.6 rainfall days, and 6.93" (176mm) of precipitation is accumulated.

What is the month with the lowest UV index in Halcyon?

Months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4.

What is the month with the least sunshine in Halcyon?

February and December, with an average of 6.5h of sunshine, are months with the least sunshine in Halcyon.

What is the most humid month in Halcyon?

With an average relative humidity of 68%, March is the most humid month.

What is the wettest month in Halcyon?

March is the month with the most rainfall in Halcyon, California. Rain falls for 8.4 days and accumulates 1.61" (41mm) of precipitation.

What is the driest month in Halcyon?

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

When are the longest days in Halcyon?

The month with the longest days in Halcyon is June, with an average of 14.5h of daylight.

What are the months with the most sunshine in Halcyon?

Months with the most sunshine are June through August, with an average of 12h of sunshine.

When is the highest UV index in Halcyon?

June and August, with an average maximum UV index of 6, are months with the highest UV index.

What is the warmest month in Halcyon?

With an average high-temperature of 79.5°F (26.4°C) and an average low-temperature of 59.9°F (15.5°C), September is the warmest month in Halcyon.

What is the least humid month in Halcyon?

With an average relative humidity of 58%, October is the least humid month.

What is the coldest month in Halcyon?

The coldest month in Halcyon is December, with an average high-temperature of 61.2°F (16.2°C) and an average low-temperature of 46.8°F (8.2°C).

What is the month with the shortest days in Halcyon?

The month with the shortest days in Halcyon is December, with an average of 9.8h of daylight.

Average temperature
Halcyon, CA

Average temperature - Halcyon, CA

The warmest month (with the highest average high temperature) is September (79.5°F).
The month with the lowest average high temperature is December (61.2°F).

The month with the highest average low temperature is September (59.9°F).
The coldest month (with the lowest average low temperature) is February (46°F).

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Average pressure
Halcyon, CA

Average pressure - Halcyon, CA

The month with the highest atmospheric pressure is January (30.12").
Months with the lowest atmospheric pressure are June, August and September (29.91").

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Average wind speed
Halcyon, CA

Average wind speed - Halcyon, CA

The windiest months (with the highest average wind speed) are April and May (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average rainfall
Halcyon, CA

Average rainfall - Halcyon, CA

The wettest month (with the highest rainfall) is March (1.61").
The driest months (with the least rainfall) are June and August (0.04").

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Average rainfall days
Halcyon, CA

Average rainfall days - Halcyon, CA

The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is August (0.8 days).

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Average daylight / Average sunshine
Halcyon, CA

Average daylight / Average sunshine - Halcyon, CA

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.8h).

Months with the most sunshine are June, July and August (Average sunshine: 12h).
Months with the least sunshine are February and December (Average sunshine: 6.5).

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Average sunshine days
Halcyon, CA

Average sunshine days - Halcyon, CA

The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is February (21 days).

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Average UV index
Halcyon, CA

Average UV index - Halcyon, CA

Months with the highest UV index are June and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average visibility
Halcyon, CA

Average visibility - Halcyon, 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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