Climate and monthly weather forecast
Rowland Heights, CA

Weather in January

January, like December, in Rowland Heights, California, is another enjoyable winter month, with an average temperature fluctuating between 66.9°F (19.4°C) and 50.2°F (10.1°C). In January, the average high-temperature is practically the same as in December - a still comfortable 66.9°F (19.4°C). Weather in January »

Weather in February

February, the last month of the winter in Rowland Heights, is also an enjoyable month, with an average temperature fluctuating between 48.9°F (9.4°C) and 66.7°F (19.3°C). In Rowland Heights, the average high-temperature in February is relatively the same as in January - a still comfortable 66.7°F (19.3°C). Weather in February »

Weather in March

The first month of the spring, March, is a pleasant month in Rowland Heights, California, with an average temperature ranging between min 50.7°F (10.4°C) and max 70.2°F (21.2°C). In March, the average high-temperature is practically the same as in February - a pleasant 70.2°F (21.2°C). Weather in March »

Weather in April

April is a moderately hot spring month in Rowland Heights, California, with an average temperature fluctuating between 73.6°F (23.1°C) and 53.2°F (11.8°C). In Rowland Heights, the average high-temperature in April is essentially the same as in March - a warm 73.6°F (23.1°C). Weather in April »

Weather in May

May, the last month of the spring in Rowland Heights, is also a moderately hot month, with temperature in the range of an average high of 75.7°F (24.3°C) and an average low of 55.9°F (13.3°C). In Rowland Heights, the average high-temperature in May is essentially the same as in April - a still warm 75.7°F (24.3°C). Weather in May »

Weather in June

June, the first month of the summer in Rowland Heights, is also a moderately hot month, with temperature in the range of an average high of 80.8°F (27.1°C) and an average low of 59.2°F (15.1°C). In Rowland Heights, the average high-temperature in June is almost the same as in May - a still moderately hot 80.8°F (27.1°C). Weather in June »

Weather in July

July is a hot summer month in Rowland Heights, California, with temperature in the range of an average low of 64.6°F (18.1°C) and an average high of 86.5°F (30.3°C). In July, the average high-temperature marginally rises from a moderately hot 80.8°F (27.1°C) in June to a hot 86.5°F (30.3°C). Weather in July »

Weather in August

August, the last month of the summer in Rowland Heights, is another hot month, with temperature in the range of an average high of 88.3°F (31.3°C) and an average low of 66.2°F (19°C). August is the warmest month, with an average high-temperature of 88.3°F (31.3°C) and an average low-temperature of 66.2°F (19°C). In August, the average heat index is evaluated at a tropical 91.4°F (33°C). Weather in August »

Weather in September

September, the first month of the autumn in Rowland Heights, is still a hot month, with an average temperature varying between 64.8°F (18.2°C) and 86°F (30°C). In September, the average high-temperature is relatively the same as in August - a still hot 86°F (30°C). Weather in September »

Weather in October

October, like September, in Rowland Heights, California, is a moderately hot autumn month, with temperature in the range of an average high of 79.7°F (26.5°C) and an average low of 60.6°F (15.9°C). In October, the average high-temperature slightly decreases from a hot 86°F (30°C) in September to a moderately hot 79.7°F (26.5°C). Weather in October »

Weather in November

November, the last month of the autumn in Rowland Heights, is another pleasant month, with an average temperature fluctuating between 72.7°F (22.6°C) and 54.9°F (12.7°C). In Rowland Heights, the average high-temperature in November marginally drops from a warm 79.7°F (26.5°C) in October to a pleasant 72.7°F (22.6°C). Weather in November »

Weather in December

The first month of the winter, December, is still a comfortable month in Rowland Heights, California, with an average temperature ranging between min 49.5°F (9.7°C) and max 64.9°F (18.3°C). The coldest month is December, with an average high-temperature of 64.9°F (18.3°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 Rowland Heights?

Throughout the year, there are 43.8 rainfall days, and 7.01" (178mm) of precipitation is accumulated.

When is the lowest UV index in Rowland Heights?

The months with the lowest UV index in Rowland Heights are January, February, November and December, with an average maximum UV index of 4.

What are the months with the least sunshine in Rowland Heights?

The months with the least sunshine are February and December, with an average of 6.8h of sunshine.

When is Daylight Saving Time (DST) in Rowland Heights?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts in Rowland Heights, California, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from PDT to PST.

What is the most humid month in Rowland Heights?

June is the most humid month, with an average relative humidity of 59%.

What is the driest month in Rowland Heights?

June and August are months with the least rain in Rowland Heights when the rain falls for 1.1 days and typically aggregates up to 0.04" (1mm) of rain.

When are the longest days in Rowland Heights?

The month with the longest days in Rowland Heights, California, is June, with an average of 14h and 23min of daylight.

What month has the most sunshine in Rowland Heights?

The month with the most sunshine in Rowland Heights is July, with an average of 12.1h of sunshine.

What is the warmest month in Rowland Heights?

The warmest month in Rowland Heights, California, is August, with an average high-temperature of 88.3°F (31.3°C) and an average low-temperature of 66.2°F (19°C).

When is the highest UV index in Rowland Heights?

With an average maximum UV index of 7, August is the month with the highest UV index in Rowland Heights, California.

What is the least humid month in Rowland Heights?

With an average relative humidity of 46%, November is the least humid month in Rowland Heights, California.

What is the coldest month in Rowland Heights?

December is the coldest month, with an average high-temperature of 64.9°F (18.3°C) and an average low-temperature of 49.5°F (9.7°C).

What is the wettest month in Rowland Heights?

December is the month with the most rainfall in Rowland Heights. Rain falls for 6 days and accumulates 1.61" (41mm) of precipitation.

What is the month with the shortest days in Rowland Heights?

With an average of 9h and 56min of daylight, December has the shortest days of the year in Rowland Heights.

Average temperature
Rowland Heights, CA

Average temperature - Rowland Heights, CA

The warmest month (with the highest average high temperature) is August (88.3°F).
The month with the lowest average high temperature is December (64.9°F).

The month with the highest average low temperature is August (66.2°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).

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Average pressure
Rowland Heights, CA

Average pressure - Rowland Heights, CA

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed
Rowland Heights, CA

Average wind speed - Rowland Heights, CA

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.6mph).

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Average humidity
Rowland Heights, CA

Average humidity - Rowland Heights, CA

The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (46%).

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Average rainfall
Rowland Heights, CA

Average rainfall - Rowland Heights, CA

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

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Average rainfall days
Rowland Heights, CA

Average rainfall days - Rowland Heights, CA

The month with the highest number of rainy days is March (6.6 days).
The month with the least rainy days is June (1.1 days).

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Average daylight / Average sunshine
Rowland Heights, CA

Average daylight / Average sunshine - Rowland Heights, CA

The month with the longest days is June (Average daylight: 14h and 23min).
The month with the shortest days is December (Average daylight: 9h and 56min).

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

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Average sunshine days
Rowland Heights, CA

Average sunshine days - Rowland Heights, CA

The month with the most sunshine days is August (28.2 days).
The month with the least sunshine days is February (21.6 days).

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Average UV index
Rowland Heights, CA

Average UV index - Rowland Heights, CA

The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).

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Average visibility
Rowland Heights, CA

Average visibility - Rowland Heights, 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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