Monthly weather forecast and climate
Lake Forest, CA

Weather in January

January, like December, in Lake Forest, California, is another comfortable winter month, with average temperature varying between 50°F (10°C) and 65.1°F (18.4°C). In January, the average high-temperature is relatively the same as in December - a still enjoyable 65.1°F (18.4°C). Weather in January »

Weather in February

February, the last month of the winter, in Lake Forest, is another comfortable month, with average temperature varying between 48.7°F (9.3°C) and 64.2°F (17.9°C). In February, the average high-temperature is almost the same as in January - a still enjoyable 64.2°F (17.9°C). Weather in February »

Weather in March

March, the first month of the spring, in Lake Forest, is still a comfortable month, with average temperature fluctuating between 66.2°F (19°C) and 50.2°F (10.1°C). In March, the average high-temperature is relatively the same as in February - a still comfortable 66.2°F (19°C). Weather in March »

Weather in April

April is an agreeable spring month in Lake Forest, California, with average temperature ranging between max 69.3°F (20.7°C) and min 52.5°F (11.4°C). In Lake Forest, the average high-temperature is almost the same as in March - a pleasant 69.3°F (20.7°C). Weather in April »

Weather in May

May, the last month of the spring, in Lake Forest, is another pleasant month, with average temperature varying between 70.9°F (21.6°C) and 55.2°F (12.9°C). In Lake Forest, the average high-temperature in May is essentially the same as in April - a still agreeable 70.9°F (21.6°C). Weather in May »

Weather in June

June, the first month of the summer, in Lake Forest, is a moderately hot month, with average temperature ranging between min 57.7°F (14.3°C) and max 75.4°F (24.1°C). In Lake Forest, the average high-temperature in June is almost the same as in May - a moderately hot 75.4°F (24.1°C). Weather in June »

Weather in July

July, like June, in Lake Forest, California, is another warm summer month, with temperature in the range of an average low of 63°F (17.2°C) and an average high of 80.4°F (26.9°C). In July, the average high-temperature is practically the same as in June - a still warm 80.4°F (26.9°C). Weather in July »

Weather in August

August, the last month of the summer, in Lake Forest, is also a moderately hot month, with temperature in the range of an average low of 64.4°F (18°C) and an average high of 82°F (27.8°C). August is the warmest month, with an average high-temperature of 82°F (27.8°C) and an average low-temperature of 64.4°F (18°C). The average heat index is calculated to 84.9°F (29.4°C). Weather in August »

Weather in September

September, the first month of the autumn, in Lake Forest, is still a warm month, with average temperature varying between 81°F (27.2°C) and 63.7°F (17.6°C). In September, the average high-temperature is practically the same as in August - a still moderately hot 81°F (27.2°C). Weather in September »

Weather in October

October, the same as September, is a moderately hot autumn month in Lake Forest, California, with average temperature fluctuating between 59.9°F (15.5°C) and 75.9°F (24.4°C). In Lake Forest, the average high-temperature is relatively the same as in September - a still moderately hot 75.9°F (24.4°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an agreeable month in Lake Forest, California, with average temperature ranging between min 54.7°F (12.6°C) and max 70°F (21.1°C). In Lake Forest, the average high-temperature in November marginally drops, from a moderately hot 75.9°F (24.4°C) in October, to an agreeable 70°F (21.1°C). Weather in November »

Weather in December

The first month of the winter, December, is still a comfortable month in Lake Forest, California, with average temperature fluctuating between 49.5°F (9.7°C) and 63.1°F (17.3°C). The coldest month is December, with an average high-temperature of 63.1°F (17.3°C) and an average low-temperature of 49.5°F (9.7°C). Weather in December »
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FAQ

How much does it rain in Lake Forest?

Throughout the year, in Lake Forest, California, there are 65.4 rainfall days, and 9.17" (233mm) of precipitation is accumulated.

When is the lowest UV index in Lake Forest?

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

What is the most humid month in Lake Forest?

Months with the highest humidity are May and June, with an average relative humidity of 69%.

What is the driest month in Lake Forest?

June is the month with the least rainfall in Lake Forest. Rain falls for 2 days and accumulates 0.08" (2mm) of precipitation.

When are the longest days in Lake Forest?

The month with the longest days is June, with an average of 14.4h of daylight.

What are the months with the highest UV index in Lake Forest?

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

What are the months with the most sunshine in Lake Forest?

Months with the most sunshine in Lake Forest are July and August, with an average of 12h of sunshine.

What is the warmest month in Lake Forest?

The warmest month in Lake Forest is August, with an average high-temperature of 82°F (27.8°C) and an average low-temperature of 64.4°F (18°C).

What is the least humid month in Lake Forest?

The least humid month in Lake Forest is November, with an average relative humidity of 55%.

What is the coldest month in Lake Forest?

With an average high-temperature of 63.1°F (17.3°C) and an average low-temperature of 49.5°F (9.7°C), December is the coldest month in Lake Forest, California.

What is the wettest month in Lake Forest?

The month with the most rainfall is December when the rain falls for 6.7 days and typically aggregates up to 1.85" (47mm) of precipitation.

What is the month with the shortest days in Lake Forest?

December has the shortest days of the year in Lake Forest, with an average of 10h of daylight.

What is the month with the least sunshine in Lake Forest?

The month with the least sunshine in Lake Forest is December, with an average of 6.6h of sunshine.

Average temperature
Lake Forest, CA

Average temperature - Lake Forest, CA

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (63.1°F).

The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).

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Average pressure
Lake Forest, CA

Average pressure - Lake Forest, CA

The month with the highest atmospheric pressure is January (30.1").
Months with the lowest atmospheric pressure are June and September (29.88").

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Average wind speed
Lake Forest, CA

Average wind speed - Lake Forest, CA

The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest months (with the lowest average wind speed) are August and September (4.5mph).

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Average humidity
Lake Forest, CA

Average humidity - Lake Forest, CA

Months with the highest relative humidity are May and June (69%).
The month with the lowest relative humidity is November (55%).

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Average rainfall
Lake Forest, CA

Average rainfall - Lake Forest, CA

The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days
Lake Forest, CA

Average rainfall days - Lake Forest, CA

The month with the highest number of rainy days is March (8.1 days).
The month with the least rainy days is June (2 days).

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Average daylight / Average sunshine
Lake Forest, CA

Average daylight / Average sunshine - Lake Forest, CA

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 10h).

Months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.6h).

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Average sunshine days
Lake Forest, CA

Average sunshine days - Lake Forest, CA

Months with the most sunshine days are January and October (24.2 days).
The month with the least sunshine days is May (19.3 days).

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Average UV index
Lake Forest, CA

Average UV index - Lake Forest, CA

Months with the highest UV index are June, July, August and September (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
Lake Forest, CA

Average visibility - Lake Forest, 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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