Monthly weather forecast and climate
Thornton, CA

Weather in January

January in Thornton, California, is a moderate winter month, with temperature in the range of an average low of 41.2°F (5.1°C) and an average high of 56.7°F (13.7°C). In Thornton, the average high-temperature in January is relatively the same as in December - a moderate 56.7°F (13.7°C). Weather in January »

Weather in February

February, the last month of the winter, in Thornton, is also a moderate month, with average temperature fluctuating between 59.7°F (15.4°C) and 41.5°F (5.3°C). In February, the average high-temperature is practically the same as in January - a still moderate 59.7°F (15.4°C). Weather in February »

Weather in March

March, the first month of the spring, in Thornton, is a comfortable month, with temperature in the range of an average high of 63.5°F (17.5°C) and an average low of 43.3°F (6.3°C). In March, the average high-temperature is relatively the same as in February - a comfortable 63.5°F (17.5°C). Weather in March »

Weather in April

April is an agreeable spring month in Thornton, California, with average temperature varying between 69.8°F (21°C) and 46.2°F (7.9°C). In April, the average high-temperature marginally rises, from an enjoyable 63.5°F (17.5°C) in March, to an agreeable 69.8°F (21°C). Weather in April »

Weather in May

May, the last month of the spring, in Thornton, is a warm month, with temperature in the range of an average low of 51.1°F (10.6°C) and an average high of 77.7°F (25.4°C). In May, the average high-temperature marginally rises, from a pleasant 69.8°F (21°C) in April, to a warm 77.7°F (25.4°C). Weather in May »

Weather in June

June, the first month of the summer, in Thornton, is a hot month, with average temperature ranging between min 56.7°F (13.7°C) and max 88.2°F (31.2°C). In June, the average high-temperature increases, from a moderately hot 77.7°F (25.4°C) in May, to a hot 88.2°F (31.2°C). Weather in June »

Weather in July

July, the same as June, in Thornton, California, is another tropical summer month, with average temperature fluctuating between 58.6°F (14.8°C) and 93.9°F (34.4°C). July is the warmest month, with an average high-temperature of 93.9°F (34.4°C) and an average low-temperature of 58.6°F (14.8°C). In July, the average heat index is appraised at a very hot 99.7°F (37.6°C). Weather in July »

Weather in August

August, the last month of the summer, in Thornton, is another hot month, with average temperature ranging between max 93°F (33.9°C) and min 58.8°F (14.9°C). In Thornton, the average high-temperature is essentially the same as in July - a still hot 93°F (33.9°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a hot month in Thornton, California, with average temperature ranging between min 58.6°F (14.8°C) and max 88.5°F (31.4°C). In September, the average high-temperature is relatively the same as in August - a still tropical 88.5°F (31.4°C). Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Thornton, California, with average temperature ranging between max 76.8°F (24.9°C) and min 53.6°F (12°C). In October, the average high-temperature decreases, from a hot 88.5°F (31.4°C) in September, to a warm 76.8°F (24.9°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an enjoyable month in Thornton, California, with temperature in the range of an average low of 45.7°F (7.6°C) and an average high of 64°F (17.8°C). In November, the average high-temperature decreases, from a warm 76.8°F (24.9°C) in October, to a comfortable 64°F (17.8°C). Weather in November »

Weather in December

The first month of the winter, December, is also a fresh month in Thornton, California, with average temperature ranging between max 55°F (12.8°C) and min 41°F (5°C). December is the coldest month, with an average high-temperature of 55°F (12.8°C) and an average low-temperature of 41°F (5°C). Weather in December »
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FAQ

How many days does it rain in Thornton?

Throughout the year, in Thornton, there are 63.8 rainfall days, and 12.6" (320mm) of precipitation is accumulated.

How many days does it snow in Thornton?

Throughout the year, there are 0.1 snowfall days.

When it does not snow in Thornton?

January through November are months without snowfall in Thornton, California.

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

Months with the lowest UV index in Thornton, California, are January, February, November and December, with an average maximum UV index of 3.

What is the wettest month in Thornton?

February is the month with the most rainfall in Thornton, California. Rain falls for 8 days and accumulates 2.4" (61mm) of precipitation.

What is the most humid month in Thornton?

The most humid month is March, with an average relative humidity of 75%.

When are the longest days in Thornton?

With an average of 14.8h of daylight, June has the longest days of the year in Thornton, California.

What is the month with the highest UV index in Thornton?

With an average maximum UV index of 7, June is the month with the highest UV index.

What is the warmest month in Thornton?

July is the warmest month in Thornton, California, with an average high-temperature of 93.9°F (34.4°C) and an average low-temperature of 58.6°F (14.8°C).

What is the least humid month in Thornton?

With an average relative humidity of 45%, July is the least humid month.

What is the driest month in Thornton?

Months with the least rainfall are July and August Rain falls for 1.4 days and accumulates 0.04" (1mm) of rain.

What month has the most sunshine in Thornton?

With an average of 12.1h of sunshine, July has the most sunshine of the year in Thornton, California.

What is the coldest month in Thornton?

December is the coldest month in Thornton, with an average high-temperature of 55°F (12.8°C) and an average low-temperature of 41°F (5°C).

When does it snow in Thornton?

December is the only month when snow falls in Thornton.

What is the snowiest month in Thornton?

December has the most snowfall days of the year in Thornton, California. Snow falls for 0.1 days.

What is the month with the shortest days in Thornton?

The month with the shortest days in Thornton is December, with an average of 9.5h of daylight.

What is the month with the least sunshine in Thornton?

With an average of 5.9h of sunshine, December has the least sunshine of the year in Thornton.

Average temperature
Thornton, CA

Average temperature - Thornton, CA

The warmest month (with the highest average high temperature) is July (93.9°F).
The month with the lowest average high temperature is December (55°F).

The month with the highest average low temperature is August (58.8°F).
The coldest month (with the lowest average low temperature) is December (41°F).

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Average pressure
Thornton, CA

Average pressure - Thornton, CA

The month with the highest atmospheric pressure is January (30.15").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed
Thornton, CA

Average wind speed - Thornton, CA

The windiest months (with the highest average wind speed) are February and June (5.8mph).
The calmest month (with the lowest average wind speed) is November (4.4mph).

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Average rainfall
Thornton, CA

Average rainfall - Thornton, CA

The wettest month (with the highest rainfall) is February (2.4").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days
Thornton, CA

Average rainfall days - Thornton, CA

The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is June (0.9 days).

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Average snowfall days
Thornton, CA

Average snowfall days - Thornton, CA

The month with the highest number of snowfall days is December (0.1 days).
Months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

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Average daylight / Average sunshine
Thornton, CA

Average daylight / Average sunshine - Thornton, CA

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.9h).

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Average sunshine days
Thornton, CA

Average sunshine days - Thornton, CA

The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is March (17.8 days).

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Average visibility
Thornton, CA

Average visibility - Thornton, 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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