Monthly weather forecast and climate
Surprise, AZ

Weather in January

January, like December, in Surprise, Arizona, is another enjoyable winter month, with average temperature varying between 63.3°F (17.4°C) and 46°F (7.8°C). In January, the average high-temperature is essentially the same as in December - a still comfortable 63.3°F (17.4°C). Weather in January »

Weather in February

February, the last month of the winter, in Surprise, is also an enjoyable month, with average temperature varying between 66.2°F (19°C) and 48.7°F (9.3°C). In Surprise, the average high-temperature is practically the same as in January - a still enjoyable 66.2°F (19°C). Weather in February »

Weather in March

The first month of the spring, March, is a moderately hot month in Surprise, Arizona, with average temperature fluctuating between 54.1°F (12.3°C) and 74.7°F (23.7°C). In Surprise, Arizona, the average high-temperature marginally rises, from a comfortable 66.2°F (19°C) in February, to a warm 74.7°F (23.7°C). Weather in March »

Weather in April

April, the same as March, is a moderately hot spring month in Surprise, Arizona, with average temperature varying between 59.4°F (15.2°C) and 81.3°F (27.4°C). In Surprise, the average high-temperature slightly increases, from 74.7°F (23.7°C) in March, to a still moderately hot 81.3°F (27.4°C). Weather in April »

Weather in May

May, the last month of the spring, in Surprise, is a hot month, with average temperature fluctuating between 66°F (18.9°C) and 89.2°F (31.8°C). In Surprise, Arizona, the average high-temperature in May slightly increases, from a warm 81.3°F (27.4°C) in April, to a tropical 89.2°F (31.8°C). Weather in May »

Weather in June

June, the first month of the summer, in Surprise, is a sweltering month, with average temperature varying between 74.1°F (23.4°C) and 100.4°F (38°C). In Surprise, the average high-temperature increases, from a tropical 89.2°F (31.8°C) in May, to a sweltering 100.4°F (38°C). Weather in June »

Weather in July

July, like June, in Surprise, Arizona, is another torrid summer month, with average temperature varying between 101.7°F (38.7°C) and 82.2°F (27.9°C). July is the warmest month, with an average high-temperature of 101.7°F (38.7°C) and an average low-temperature of 82.2°F (27.9°C). In July, the average relative humidity is 29%. Weather in July »

Weather in August

The last month of the summer, August, is another torrid month in Surprise, Arizona, with average temperature varying between 83.1°F (28.4°C) and 100.9°F (38.3°C). In Surprise, the average high-temperature is essentially the same as in July - a still very hot 100.9°F (38.3°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a torrid month in Surprise, Arizona, with average temperature varying between 95°F (35°C) and 77°F (25°C). In Surprise, Arizona, the average high-temperature slightly decreases, from 100.9°F (38.3°C) in August, to a still sweltering 95°F (35°C). Weather in September »

Weather in October

October, like September, in Surprise, Arizona, is a moderately hot autumn month, with average temperature ranging between min 65.5°F (18.6°C) and max 83.5°F (28.6°C). In Surprise, the average high-temperature drops, from a very hot 95°F (35°C) in September, to a moderately hot 83.5°F (28.6°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an agreeable month in Surprise, Arizona, with average temperature varying between 54.7°F (12.6°C) and 72.5°F (22.5°C). In November, the average high-temperature drops, from a warm 83.5°F (28.6°C) in October, to an agreeable 72.5°F (22.5°C). Weather in November »

Weather in December

The first month of the winter, December, is also an enjoyable month in Surprise, Arizona, with average temperature fluctuating between 61.7°F (16.5°C) and 46°F (7.8°C). The coldest month is December, with an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 46°F (7.8°C). Weather in December »
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FAQ

How much does it rain in Surprise?

In Surprise, during the entire year, the rain falls for 60.7 days and collects up to 8.62" (219mm) of precipitation.

What is the least humid month in Surprise?

The least humid month is June, with an average relative humidity of 17%.

What is the driest month in Surprise?

The month with the least rainfall is June when the rain falls for 1.2 days and typically collects 0.12" (3mm) of precipitation.

When are the longest days in Surprise?

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

What month has the most sunshine in Surprise?

With an average of 12.2h of sunshine, June has the most sunshine of the year in Surprise.

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

June through August, with an average maximum UV index of 8, are months with the highest UV index.

What is the warmest month in Surprise?

July is the warmest month, with an average high-temperature of 101.7°F (38.7°C) and an average low-temperature of 82.2°F (27.9°C).

What is the wettest month in Surprise?

The month with the most rainfall is July when the rain falls for 11.4 days and typically aggregates up to 1.3" (33mm) of precipitation.

What is the coldest month in Surprise?

December is the coldest month in Surprise, Arizona, with an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 46°F (7.8°C).

What is the most humid month in Surprise?

December is the most humid month, with an average relative humidity of 44%.

What is the month with the shortest days in Surprise?

The month with the shortest days is December, with an average of 10h of daylight.

What is the month with the least sunshine in Surprise?

December has the least sunshine of the year, with an average of 6.8h of sunshine.

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

With an average maximum UV index of 3, December is the month with the lowest UV index in Surprise, Arizona.

Average temperature
Surprise, AZ

Average temperature - Surprise, AZ

The warmest month (with the highest average high temperature) is July (101.7°F).
The month with the lowest average high temperature is December (61.7°F).

The month with the highest average low temperature is August (83.1°F).
The coldest months (with the lowest average low temperature) are January and December (46°F).

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Average pressure
Surprise, AZ

Average pressure - Surprise, AZ

The month with the highest atmospheric pressure is January (30.09").
The month with the lowest atmospheric pressure is June (29.8").

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Average wind speed
Surprise, AZ

Average wind speed - Surprise, AZ

The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is December (4.7mph).

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Average rainfall
Surprise, AZ

Average rainfall - Surprise, AZ

The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is June (0.12").

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Average rainfall days
Surprise, AZ

Average rainfall days - Surprise, AZ

The month with the highest number of rainy days is July (11.4 days).
The month with the least rainy days is June (1.2 days).

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Average daylight / Average sunshine
Surprise, AZ

Average daylight / Average sunshine - Surprise, AZ

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

The month with the most sunshine is June (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6.8h).

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Average sunshine days
Surprise, AZ

Average sunshine days - Surprise, AZ

The month with the most sunshine days is May (28.2 days).
The month with the least sunshine days is July (15.2 days).

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Average visibility
Surprise, AZ

Average visibility - Surprise, 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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