Climate and monthly weather forecast
Lake San Marcos, CA

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Weather in January

January, like December, in Lake San Marcos, California, is another refreshing winter month, with an average temperature fluctuating between 48.7°F (9.3°C) and 64.9°F (18.3°C). January reports an average high-temperature of a still enjoyable 64.9°F (18.3°C), slightly varied from December's 63.3°F (17.4°C). Weather in January »

Weather in February

February, the last month of the winter in Lake San Marcos, is another comfortable month, with an average temperature fluctuating between 48°F (8.9°C) and 63.3°F (17.4°C). February and December mark Lake San Marcos's lowest temperatures, averaging a high-temperature of 63.3°F (17.4°C). Weather in February »

Weather in March

March, the first month of the spring in Lake San Marcos, is still a comfortable month, with an average temperature varying between 65.8°F (18.8°C) and 49.5°F (9.7°C). The initiation of March records an average high-temperature of a still comfortable 65.8°F (18.8°C), displaying a near consistency with the previous month. Weather in March »

Weather in April

April in Lake San Marcos, California, is a pleasant spring month, with an average temperature ranging between max 68.5°F (20.3°C) and min 51.3°F (10.7°C). April's presence records an average high-temperature of an agreeable 68.5°F (20.3°C), closely mirroring March's climate. Weather in April »

Weather in May

May, the last month of the spring in Lake San Marcos, is another pleasant month, with an average temperature ranging between max 70.3°F (21.3°C) and min 53.6°F (12°C). May observes an average high-temperature of a still pleasant 70.3°F (21.3°C), marking an insignificant difference from April's 68.5°F (20.3°C). Weather in May »

Weather in June

June, the first month of the summer in Lake San Marcos, is a moderately hot month, with an average temperature ranging between min 56.5°F (13.6°C) and max 75.2°F (24°C). The dawn of June sees an average high-temperature of a warm 75.2°F (24°C), subtly contrasting with May's 70.3°F (21.3°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Lake San Marcos, California, with an average temperature fluctuating between 80.2°F (26.8°C) and 62.6°F (17°C). The arrival of July marks a slight shift to an average high-temperature of a still moderately hot 80.2°F (26.8°C) from June's 75.2°F (24°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Lake San Marcos, California, with an average temperature fluctuating between 64.2°F (17.9°C) and 81.9°F (27.7°C). August, with its high-temperature average of 81.9°F (27.7°C) and a low-temperature average of 64.2°F (17.9°C), is the warmest month. The heat index in August is calculated to be 84.2°F (29°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Lake San Marcos, California, with an average temperature fluctuating between 80.8°F (27.1°C) and 63.3°F (17.4°C). The arrival of September marks a slight shift to an average high-temperature of a still warm 80.8°F (27.1°C) from August's 81.9°F (27.7°C). Weather in September »

Weather in October

October, like September, in Lake San Marcos, California, is a moderately hot autumn month, with an average temperature fluctuating between 58.8°F (14.9°C) and 75.4°F (24.1°C). The move into October indicates a slight reduction in the average high-temperature, down from September's warm 80.8°F (27.1°C) to a still moderately hot 75.4°F (24.1°C). Weather in October »

Weather in November

November, the last month of the autumn in Lake San Marcos, is also an agreeable month, with temperature in the range of an average high of 69.4°F (20.8°C) and an average low of 54°F (12.2°C). November marks a gentle change in average high-temperature, declining from October's warm 75.4°F (24.1°C) to an agreeable 69.4°F (20.8°C). Weather in November »

Weather in December

The first month of the winter, December, is still a comfortable month in Lake San Marcos, California, with an average temperature varying between 63.3°F (17.4°C) and 48.2°F (9°C). Lake San Marcos's coldest season falls during February and December, averaging a high-temperature of 63.3°F (17.4°C). Weather in December »
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Frequently asked questions

How many days does it rain in Lake San Marcos?

In Lake San Marcos, during the entire year, the rain falls for 52.1 days and collects up to 6.1" (155mm) of precipitation.

When is the lowest UV index in Lake San Marcos?

The months with the lowest UV index in Lake San Marcos, California, are January through March, November and December, with an average maximum UV index of 4.

What part of the year is the coldest in Lake San Marcos?

February and December are identified as the coldest months in Lake San Marcos, California, with an average high-temperature of 63.3°F (17.4°C).

When is Daylight Saving Time (DST) in Lake San Marcos?

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.

What is the most humid month in Lake San Marcos?

With an average relative humidity of 70%, May is the most humid month in Lake San Marcos, California.

What is the driest month in Lake San Marcos?

The month with the least rainfall in Lake San Marcos, California, is June, when the rain falls for 1.2 days and typically collects 0.08" (2mm) of precipitation.

When are the longest days in Lake San Marcos?

June has the longest days of the year in Lake San Marcos, with an average of 14h and 18min of daylight.

What is the month with the highest UV index in Lake San Marcos?

June through September, with an average maximum UV index of 6, are months with the highest UV index in Lake San Marcos, California.

What month has the most sunshine in Lake San Marcos?

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

What is the warmest month in Lake San Marcos?

August temperatures in Lake San Marcos tend to peak at an average high of 81.9°F (27.7°C) and dip to a low of 64.2°F (17.9°C).

What is the least humid month in Lake San Marcos?

The least humid month is November, with an average relative humidity of 56%.

What is the rainiest month in Lake San Marcos?

The month with the most rainfall is December, when the rain falls for 5.9 days and typically aggregates up to 1.22" (31mm) of precipitation.

What is the month with the shortest days in Lake San Marcos?

The month with the shortest days in Lake San Marcos, California, is December, with an average of 10h and 0min of daylight.

What is the month with the least sunshine in Lake San Marcos?

With an average of 6.8h of sunshine, December has the least sunshine of the year in Lake San Marcos, California.

Average temperature
Lake San Marcos, CA

Average temperature - Lake San Marcos, CA

The warmest month (with the highest average high temperature) is August (81.9°F).
The months with the lowest average high temperature are February and December (63.3°F).

The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is February (48°F).

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Average pressure
Lake San Marcos, CA

Average pressure - Lake San Marcos, CA

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed
Lake San Marcos, CA

Average wind speed - Lake San Marcos, CA

The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is October (4.4mph).

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Average humidity
Lake San Marcos, CA

Average humidity - Lake San Marcos, CA

The month with the highest relative humidity is May (70%).
The month with the lowest relative humidity is November (56%).

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Average rainfall
Lake San Marcos, CA

Average rainfall - Lake San Marcos, CA

The wettest month (with the highest rainfall) is December (1.22").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days
Lake San Marcos, CA

Average rainfall days - Lake San Marcos, CA

The month with the highest number of rainy days is March (7.8 days).
The month with the least rainy days is June (1.2 days).

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Average daylight / Average sunshine
Lake San Marcos, CA

Average daylight / Average sunshine - Lake San Marcos, CA

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).

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Average sunshine days
Lake San Marcos, CA

Average sunshine days - Lake San Marcos, CA

The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is February (20 days).

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Average UV index
Lake San Marcos, CA

Average UV index - Lake San Marcos, CA

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

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Average visibility
Lake San Marcos, CA

Average visibility - Lake San Marcos, 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).

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Lake San Marcos, California, USA

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