Climate and monthly weather forecast
Portal, AZ

Weather in January

January, like December, in Portal, Arizona, is another fresh winter month, with an average temperature fluctuating between 54.9°F (12.7°C) and 36.3°F (2.4°C). In January, the average high-temperature is essentially 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 moderate month, with an average temperature varying between 40.1°F (4.5°C) and 59.9°F (15.5°C). In Portal, the average high-temperature in February is essentially the same as in January - a mild 59.9°F (15.5°C). Weather in February »

Weather in March

The first month of the spring, March, is a pleasant month in Portal, Arizona, with temperature in the range of an average high of 68.2°F (20.1°C) and an average low of 46.4°F (8°C). In March, the average high-temperature slightly increases from a moderate 59.9°F (15.5°C) in February to a pleasant 68.2°F (20.1°C). Weather in March »

Weather in April

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

Weather in May

May, the last month of the spring in Portal, is also a moderately hot month, with temperature in the range of an average low of 57.7°F (14.3°C) and an average high of 82.9°F (28.3°C). In Portal, the average high-temperature in May 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 an average temperature ranging between max 92.8°F (33.8°C) and min 70°F (21.1°C). The warmest month 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). Weather in June »

Weather in July

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

Weather in August

August, the last month of the summer in Portal, is another hot month, with an average temperature fluctuating between 72°F (22.2°C) and 89.6°F (32°C). In August, the average high-temperature is almost the same as in July - a still tropical 89.6°F (32°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Portal, Arizona, 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 hot 89.6°F (32°C) in August to a warm 84.2°F (29°C). Weather in September »

Weather in October

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

Weather in November

The last month of the autumn, November, is also an enjoyable month in Portal, Arizona, with an average temperature ranging between max 63.9°F (17.7°C) and min 44.1°F (6.7°C). In November, the average high-temperature decreases from a moderately hot 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 an average temperature fluctuating between 37.6°F (3.1°C) and 54.5°F (12.5°C). The coldest month is December, with an average high-temperature of 54.5°F (12.5°C) and an average low-temperature of 37.6°F (3.1°C). 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, 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 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?

In Portal, Arizona, snow does not fall in April through October.

What is the least humid month in Portal?

With an average relative humidity of 21%, May is the least humid month in Portal.

What are the months with the highest UV index in Portal?

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

What is the warmest month in Portal?

With an average high-temperature of 92.8°F (33.8°C) and an average low-temperature of 70°F (21.1°C), June is the warmest month.

When are the longest days in Portal?

With an average of 14h and 12min of daylight, June has the longest days of the year.

What month has the most sunshine in Portal?

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

What is the wettest month in Portal?

The month with the most rainfall in Portal, Arizona, 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?

The coldest month in Portal, Arizona, is December, 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?

The most humid month is December, with an average relative humidity of 51%.

When does it snow the most in Portal?

The month with the most snowfall 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?

With an average of 10h and 6min of daylight, December has the shortest days of the year.

Is there Daylight Saving Time (DST) in Portal?

Portal, Arizona, does not utilize Daylight Saving Time (DST). MST timezone is used throughout the entire year.

What is the month with the least sunshine in Portal?

December has the least sunshine of the year in Portal, with an average of 7h of sunshine.

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

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

Average pressure
Portal, AZ

Average pressure - Portal, AZ

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

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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").
The 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).
The 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: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).

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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

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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