Monthly weather forecast and climate
Round Rock, AZ

Weather in January

January, the same as December, is a wintry winter month in Round Rock, Arizona, with temperature in the range of an average low of 24.6°F (-4.1°C) and an average high of 38.8°F (3.8°C). The coldest month is January, with an average high-temperature of 38.8°F (3.8°C) and an average low-temperature of 24.6°F (-4.1°C). Weather in January »

Weather in February

The last month of the winter, February, is a chilly month in Round Rock, Arizona, with average temperature ranging between min 28.8°F (-1.8°C) and max 44.2°F (6.8°C). In Round Rock, Arizona, the average high-temperature in February slightly increases, from a wintry 38.8°F (3.8°C) in January, to a frosty 44.2°F (6.8°C). Weather in February »

Weather in March

March, the first month of the spring, in Round Rock, is a cool month, with temperature in the range of an average low of 36.3°F (2.4°C) and an average high of 54.9°F (12.7°C). In Round Rock, the average high-temperature in March rises, from a frosty 44.2°F (6.8°C) in February, to a fresh 54.9°F (12.7°C). Weather in March »

Weather in April

April in Round Rock, Arizona, is an enjoyable spring month, with temperature in the range of an average low of 42.3°F (5.7°C) and an average high of 62.2°F (16.8°C). In Round Rock, the average high-temperature slightly increases, from a fresh 54.9°F (12.7°C) in March, to a comfortable 62.2°F (16.8°C). Weather in April »

Weather in May

May, the last month of the spring, in Round Rock, is a pleasant month, with average temperature fluctuating between 50.5°F (10.3°C) and 71.2°F (21.8°C). In May, the average high-temperature rises, from a comfortable 62.2°F (16.8°C) in April, to an agreeable 71.2°F (21.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Round Rock, Arizona, with average temperature fluctuating between 84.7°F (29.3°C) and 62.2°F (16.8°C). In June, the average high-temperature increases, from an agreeable 71.2°F (21.8°C) in May, to a moderately hot 84.7°F (29.3°C). Weather in June »

Weather in July

July is a tropical summer month in Round Rock, Arizona, with average temperature fluctuating between 86.9°F (30.5°C) and 69.1°F (20.6°C). The warmest month is July, with an average high-temperature of 86.9°F (30.5°C) and an average low-temperature of 69.1°F (20.6°C). Weather in July »

Weather in August

August, the last month of the summer, in Round Rock, is another warm month, with average temperature fluctuating between 84.6°F (29.2°C) and 68°F (20°C). In August, the average high-temperature is relatively the same as in July - a warm 84.6°F (29.2°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Round Rock, Arizona, with average temperature fluctuating between 60.1°F (15.6°C) and 77.7°F (25.4°C). In September, the average high-temperature slightly decreases, from a moderately hot 84.6°F (29.2°C) in August, to a still warm 77.7°F (25.4°C). Weather in September »

Weather in October

October, like September, in Round Rock, Arizona, is another comfortable autumn month, with average temperature ranging between max 63.9°F (17.7°C) and min 46°F (7.8°C). In Round Rock, the average high-temperature drops, from a moderately hot 77.7°F (25.4°C) in September, to an enjoyable 63.9°F (17.7°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Round Rock, Arizona, with average temperature fluctuating between 34.7°F (1.5°C) and 52.2°F (11.2°C). In November, the average high-temperature decreases, from an enjoyable 63.9°F (17.7°C) in October, to a fresh 52.2°F (11.2°C). Weather in November »

Weather in December

December, the first month of the winter, in Round Rock, is still a cold month, with average temperature ranging between max 40.1°F (4.5°C) and min 25.7°F (-3.5°C). In Round Rock, Arizona, the average high-temperature in December decreases, from a fresh 52.2°F (11.2°C) in November, to a wintry 40.1°F (4.5°C). Weather in December »
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FAQ

What is the coldest month in Round Rock?

The coldest month in Round Rock, Arizona, is January, with an average high-temperature of 38.8°F (3.8°C) and an average low-temperature of 24.6°F (-4.1°C).

What is the most humid month in Round Rock?

The most humid month in Round Rock is January, with an average relative humidity of 67%.

How much does it rain in Round Rock?

Throughout the year, there are 75.5 rainfall days, and 7.91" (201mm) of precipitation is accumulated.

When does it snow in Round Rock?

January through May, October through December are months with snowfall in Round Rock, Arizona.

How many days does it snow in Round Rock?

In Round Rock, Arizona, during the entire year, snow falls for 20.3 days, and aggregates up to 12.52" (318mm) of snow.

What is the month with the least sunshine in Round Rock?

The month with the least sunshine is January, with an average of 6.7h of sunshine.

What is the month with the lowest UV index in Round Rock?

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the least humid month in Round Rock?

With an average relative humidity of 19%, June is the least humid month in Round Rock, Arizona.

What is the driest month in Round Rock?

June is the month with the least rainfall in Round Rock. Rain falls for 3.3 days and accumulates 0.2" (5mm) of precipitation.

When it does not snow in Round Rock?

June through September are months without snowfall.

When are the longest days in Round Rock?

With an average of 14.6h of daylight, June has the longest days of the year.

What is the warmest month in Round Rock?

With an average high-temperature of 86.9°F (30.5°C) and an average low-temperature of 69.1°F (20.6°C), July is the warmest month in Round Rock.

What is the rainiest month in Round Rock?

July is the month with the most rainfall in Round Rock, Arizona. Rain falls for 13.7 days and accumulates 1.3" (33mm) of precipitation.

What is the month with the highest UV index in Round Rock?

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

What month has the most sunshine in Round Rock?

With an average of 11.9h of sunshine, August has the most sunshine of the year.

What is the snowiest month in Round Rock?

The month with the most snowfall is December when snow falls for 5.8 days and typically aggregates up to 4.8" (122mm) of snow.

What is the month with the shortest days in Round Rock?

The month with the shortest days is December, with an average of 9.7h of daylight.

Average temperature
Round Rock, AZ

Average temperature - Round Rock, AZ

The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (38.8°F).

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).

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Average pressure
Round Rock, AZ

Average pressure - Round Rock, AZ

The month with the highest atmospheric pressure is January (30.2").
The month with the lowest atmospheric pressure is June (29.84").

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Average wind speed
Round Rock, AZ

Average wind speed - Round Rock, AZ

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is January (5.5mph).

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Average rainfall
Round Rock, AZ

Average rainfall - Round Rock, AZ

The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is June (0.2").

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Average rainfall days
Round Rock, AZ

Average rainfall days - Round Rock, AZ

The month with the highest number of rainy days is July (13.7 days).
Months with the least rainy days are February and June (3.3 days).

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Average snowfall
Round Rock, AZ

Average snowfall - Round Rock, AZ

The month with the highest snowfall is December (4.8").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Round Rock, AZ

Average snowfall days - Round Rock, AZ

Months with the highest number of snowfall days are January and December (5.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Round Rock, AZ

Average daylight / Average sunshine - Round Rock, AZ

The month with the longest days is June (Average daylight: 14.6h).
The month with the shortest days is December (Average daylight: 9.7h).

The month with the most sunshine is August (Average sunshine: 11.9h).
The month with the least sunshine is January (Average sunshine: 6.7h).

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Average sunshine days
Round Rock, AZ

Average sunshine days - Round Rock, AZ

The month with the most sunshine days is June (25.4 days).
The month with the least sunshine days is July (13.2 days).

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Average visibility
Round Rock, AZ

Average visibility - Round Rock, AZ

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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