October weather forecast
Portal, AZ

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Weather in October

October's weather in Portal, Arizona, gives a clear indication that Fall is in full swing. There is a significant temperature drop, and the summer heat becomes a distant memory. Similarly, the number of daylight hours decreases, and the winds gain speed, reflecting the seasonal change. One of the striking features of the month is the reduced rainfall of approximately 0.55" (14mm) compared to last month. This reduction in rainfall paves the way for drier and cooler weather ideal for fall activities.

Temperature

Transition from September to October in Portal is accompanied by a temperature drop, with average high-temperatures decreasing from a warm 84.2°F (29°C) to a still moderately hot 74.8°F (23.8°C). October's nights observe an average temperature of 55.9°F (13.3°C).

Humidity

In Portal, the average relative humidity in October is 40%.

Rainfall

In October, the rain falls for 4.9 days. Throughout October, 0.55" (14mm) of precipitation is accumulated. In Portal, Arizona, during the entire year, the rain falls for 73.4 days and collects up to 7.91" (201mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In October, the average length of the day in Portal is 11h and 23min.
On the first day of October in Portal, sunrise is at 6:10 am and sunset at 6:00 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 5:27 pm MST.

Sunshine

In Portal, the average sunshine in October is 7.4h.

UV index

In Portal, the average daily maximum UV index in October is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 4 in October transforms into the following instructions:
Undertake precautions - It is suggested to shield oneself from sunburn. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
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Frequently asked questions

What is the average October temperature in Portal?

The high-temperature, in October, in Portal, records 74.8°F (23.8°C), while the low-temperature is 55.9°F (13.3°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in September is estimated at 84.2°F (29°C).

What is the average humidity in October in Portal?

In October, the average relative humidity in Portal, Arizona, is 40%.

How many days does it rain in October in Portal?

In Portal, Arizona, during October, the rain falls for 4.9 days and regularly aggregates up to 0.55" (14mm) of precipitation.

When it does not snow in Portal?

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

Does it snow in Portal in October?

In Portal, Arizona, in October, it doesn't snow. In November, it regularly snows.

What is the average length of the day in October in Portal?

In Portal, the average day length in October is 11h and 23min.

When are sunrise and sunset in October in Portal?

In October, on the first day of the month, sunrise is at 6:10 am and sunset at 6:00 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 5:27 pm MST.

How long on average sun shines in October in Portal?

In October, the average sunshine duration in Portal, Arizona, is 7.4h.

What is the UV index reading in October in Portal?

In October, the average daily maximum UV index in Portal, Arizona, is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Portal, AZ

Average temperature in October - Portal, AZ
  • Average high temperature in October: 74.8°F

The warmest month (with the highest average high temperature) is June (92.8°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in October: 55.9°F

The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (36.3°F).

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Average pressure in October
Portal, AZ

Average pressure in October - Portal, AZ
  • Average pressure in October: 29.97"Hg

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 in October
Portal, AZ

Average wind speed in October - Portal, AZ
  • Average wind speed in October: 8mph

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 humidity in October
Portal, AZ

Average humidity in October - Portal, AZ
  • Average humidity in October: 40%

The month with the highest relative humidity is December (51%).
The month with the lowest relative humidity is May (21%).

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Average rainfall in October
Portal, AZ

Average rainfall in October - Portal, AZ
  • Average rainfall in October: 0.55"

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 in October
Portal, AZ

Average rainfall days in October - Portal, AZ
  • Average rainfall days in October: 4.9 days

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 in October
Portal, AZ

Average snowfall in October - Portal, AZ
  • Average snowfall in October: 0"

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 in October
Portal, AZ

Average snowfall days in October - Portal, AZ
  • Average snowfall days in October: 0 days

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 in October /
Average sunshine in October
Portal, AZ

Average daylight in October / Average sunshine in October - Portal, AZ
  • Average daylight in October: 11h and 2min

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).

  • Average sunshine in October: 7h and 2min

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 in October
Portal, AZ

Average sunshine days in October - Portal, AZ
  • Average sunshine days in October: 23.7 days

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 UV index in October
Portal, AZ

Average UV index in October - Portal, AZ
  • Average UV index in October: 4

The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in October
Portal, AZ

Average cloud cover in October - Portal, AZ
  • Average cloud cover in October: 11

The months with the most cloud cover are July and December (Cloud cover 20).
The month with the least cloud cover is May (Cloud cover 8).

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Average visibility in October
Portal, AZ

Average visibility in October - Portal, AZ
  • Average visibility in October: 6mi

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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Portal, Arizona, USA

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