Monthly weather forecast and climate
Portal, AZ

Weather in January

January, like December, in Portal, Arizona, is a cool winter month, with average temperature varying between 54.9°F (12.7°C) and 36.3°F (2.4°C). In Portal, the average high-temperature is relatively the same as in December - a still fresh 54.9°F (12.7°C). Weather in January »

Weather in February

February, the last month of the winter, in Portal, is a mild month, with average temperature fluctuating between 59.9°F (15.5°C) and 40.1°F (4.5°C). In Portal, the average high-temperature in February is almost the same as in January - a moderate 59.9°F (15.5°C). Weather in February »

Weather in March

March, the first month of the spring, in Portal, is an agreeable month, with average temperature ranging between min 46.4°F (8°C) and max 68.2°F (20.1°C). In March, the average high-temperature slightly increases, from a mild 59.9°F (15.5°C) in February, to an agreeable 68.2°F (20.1°C). Weather in March »

Weather in April

April in Portal, Arizona, is a warm spring month, with average temperature varying between 51.3°F (10.7°C) and 75.2°F (24°C). In Portal, the average high-temperature in April slightly increases, from a pleasant 68.2°F (20.1°C) in March, to a moderately hot 75.2°F (24°C). Weather in April »

Weather in May

The last month of the spring, May, is another warm month in Portal, Arizona, with average temperature varying between 57.7°F (14.3°C) and 82.9°F (28.3°C). In Portal, the average high-temperature marginally rises, from a moderately hot 75.2°F (24°C) in April, to a still warm 82.9°F (28.3°C). Weather in May »

Weather in June

June, the first month of the summer, in Portal, is a hot month, with average temperature fluctuating between 92.8°F (33.8°C) and 70°F (21.1°C). June is the warmest month, with an average high-temperature of 92.8°F (33.8°C) and an average low-temperature of 70°F (21.1°C). Weather in June »

Weather in July

July, the same as June, in Portal, Arizona, is another tropical summer month, with average temperature ranging between min 73°F (22.8°C) and max 91°F (32.8°C). In Portal, Arizona, the average high-temperature is almost the same as in June - a still tropical 91°F (32.8°C). Weather in July »

Weather in August

The last month of the summer, August, is another hot month in Portal, Arizona, with average temperature ranging between max 89.6°F (32°C) and min 72°F (22.2°C). In Portal, the average high-temperature is essentially the same as in July - a still hot 89.6°F (32°C). Weather in August »

Weather in September

September, the first month of the autumn, in Portal, is still a warm month, with temperature in the range of an average high of 84.2°F (29°C) and an average low of 66.4°F (19.1°C). In September, the average high-temperature slightly decreases, from a tropical 89.6°F (32°C) in August, to a moderately hot 84.2°F (29°C). Weather in September »

Weather in October

October, the same as September, is a moderately hot autumn month in Portal, Arizona, with average temperature varying between 74.8°F (23.8°C) and 55.9°F (13.3°C). In Portal, the average high-temperature in October drops, from 84.2°F (29°C) in September, to a still moderately hot 74.8°F (23.8°C). Weather in October »

Weather in November

November, the last month of the autumn, in Portal, is another comfortable month, with average temperature varying between 63.9°F (17.7°C) and 44.1°F (6.7°C). In Portal, the average high-temperature drops, from a warm 74.8°F (23.8°C) in October, to an enjoyable 63.9°F (17.7°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cool month in Portal, Arizona, with temperature in the range of an average low of 37.6°F (3.1°C) and an average high of 54.5°F (12.5°C). With an average high-temperature of 54.5°F (12.5°C) and an average low-temperature of 37.6°F (3.1°C), December is the coldest month. Weather in December »
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FAQ

How much does it rain in Portal?

Throughout the year, in Portal, Arizona, there are 73.4 rainfall days, and 7.91" (201mm) of precipitation is accumulated.

When does it snow in Portal?

Months with snowfall are January through March, November and December.

How much does it snow in Portal?

In Portal, Arizona, during the entire year, snow falls for 3.5 days, and aggregates up to 1.3" (33mm) of snow.

What is the driest month in Portal?

The month with the least rainfall in Portal is April when the rain falls for 2.8 days and typically collects 0.12" (3mm) of precipitation.

When it does not snow in Portal?

April through October are months without snowfall in Portal, Arizona.

What is the least humid month in Portal?

May is the least humid month, with an average relative humidity of 21%.

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

May through August, with an average maximum UV index of 7, are months with the highest UV index in Portal.

What is the warmest month in Portal?

The warmest month in Portal, Arizona, is June, with an average high-temperature of 92.8°F (33.8°C) and an average low-temperature of 70°F (21.1°C).

When are the longest days in Portal?

June has the longest days of the year in Portal, with an average of 14.2h of daylight.

What month has the most sunshine in Portal?

June has the most sunshine of the year, with an average of 11.9h of sunshine.

What is the wettest month in Portal?

The month with the most rainfall in Portal is July when the rain falls for 15 days and typically aggregates up to 1.81" (46mm) of precipitation.

What is the coldest month in Portal?

December is the coldest month in Portal, Arizona, with an average high-temperature of 54.5°F (12.5°C) and an average low-temperature of 37.6°F (3.1°C).

What is the most humid month in Portal?

With an average relative humidity of 51%, December is the most humid month in Portal.

What is the snowiest month in Portal?

The month with the most snowfall in Portal is December when snow falls for 1.5 days and typically aggregates up to 0.79" (20mm) of snow.

What is the month with the shortest days in Portal?

December has the shortest days of the year in Portal, Arizona, with an average of 10.1h of daylight.

What is the month with the least sunshine in Portal?

With an average of 7h of sunshine, December has the least sunshine of the year.

When is the lowest UV index in Portal?

With an average maximum UV index of 2, December is the month with the lowest UV index in Portal, Arizona.

Average pressure
Portal, AZ

Average pressure - Portal, AZ

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.86").

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Average wind speed
Portal, AZ

Average wind speed - Portal, AZ

The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is January (7.1mph).

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Average rainfall
Portal, AZ

Average rainfall - Portal, AZ

The wettest month (with the highest rainfall) is July (1.81").
The driest month (with the least rainfall) is April (0.12").

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Average rainfall days
Portal, AZ

Average rainfall days - Portal, AZ

The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is May (2.1 days).

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Average snowfall
Portal, AZ

Average snowfall - Portal, AZ

The month with the highest snowfall is December (0.79").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days
Portal, AZ

Average snowfall days - Portal, AZ

The month with the highest number of snowfall days is December (1.5 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Portal, AZ

Average daylight / Average sunshine - Portal, AZ

The month with the longest days is June (Average daylight: 14.2h).
The month with the shortest days is December (Average daylight: 10.1h).

The month with the most sunshine is June (Average sunshine: 11.9h).
The month with the least sunshine is December (Average sunshine: 7h).

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Average sunshine days
Portal, AZ

Average sunshine days - Portal, AZ

The month with the most sunshine days is May (28.5 days).
The month with the least sunshine days is July (9.9 days).

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Average visibility
Portal, AZ

Average visibility - Portal, 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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