January weather forecast and climate
Phoenix, AZ

The city of Phoenix, Arizona at dusk
The city of Phoenix, Arizona at dusk

Weather in January

January, like December, in Phoenix, Arizona, is another comfortable winter month, with temperature in the range of an average high of 64.2°F (17.9°C) and an average low of 47.5°F (8.6°C).

Temperature

In Phoenix, the average high-temperature is essentially the same as in December - a still enjoyable 64.2°F (17.9°C). In January, the average low-temperature is 47.5°F (8.6°C).

Humidity

The average relative humidity in Phoenix is 42%.

Rainfall

In Phoenix, during January, the rain falls for 3 days and regularly aggregates up to 0.28" (7mm) of precipitation. Throughout the year, in Phoenix, there are 44.6 rainfall days, and 5.04" (128mm) of precipitation is accumulated.

Snowfall

January through August, October through December are months without snowfall.

Daylight

In Phoenix, the average length of the day in January is 10.2h.

Sunshine

The average sunshine in Phoenix is 7.1h.

UV index

The average daily maximum UV index in Phoenix is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in January in Phoenix?

In January, in Phoenix, Arizona, the average high-temperature is 64.2°F (17.9°C), and the average low-temperature is 47.5°F (8.6°C).

What is the average humidity in January in Phoenix?

The average relative humidity in January in Phoenix, Arizona, is 42%.

How many days does it rain in January in Phoenix?

In Phoenix, during January, the rain falls for 3 days and regularly aggregates up to 0.28" (7mm) of precipitation.

When it does not snow in Phoenix?

In Phoenix, Arizona, snow does not fall in January through August, October through December.

What is the average length of the day in January in Phoenix?

In January, the average length of the day in Phoenix, Arizona, is 10.2h.

How many hours of sunshine does Phoenix have in January?

In January, the average sunshine in Phoenix is 7.1h.

What is the UV index reading in January in Phoenix?

The average daily maximum UV index in January is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in January
Phoenix, AZ

Average temperature in January - Phoenix, AZ
  • Average high temperature in January: 64.2°F

The warmest month (with the highest average high temperature) is July (103.6°F).
The month with the lowest average high temperature is December (63°F).

  • Average low temperature in January: 47.5°F

The month with the highest average low temperature is August (84.7°F).
The coldest month (with the lowest average low temperature) is January (47.5°F).

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Average pressure in January
Phoenix, AZ

Average pressure in January - Phoenix, AZ
  • Average pressure in January: 30.09"

The month with the highest atmospheric pressure is January (30.09").
The month with the lowest atmospheric pressure is June (29.81").

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Average wind speed in January
Phoenix, AZ

Average wind speed in January - Phoenix, AZ
  • Average wind speed in January: 4.5mph

The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is December (4.3mph).

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Average humidity in January
Phoenix, AZ

Average humidity in January - Phoenix, AZ
  • Average humidity in January: 42%

The month with the highest relative humidity is December (43%).
The month with the lowest relative humidity is June (16%).

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Average rainfall in January
Phoenix, AZ

Average rainfall in January - Phoenix, AZ
  • Average rainfall in January: 0.28"

The wettest month (with the highest rainfall) is July (0.75").
The driest months (with the least rainfall) are May and June (0.08").

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Average rainfall days in January
Phoenix, AZ

Average rainfall days in January - Phoenix, AZ
  • Average rainfall days in January: 3 days

The month with the highest number of rainy days is July (7.8 days).
The month with the least rainy days is June (0.8 days).

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Average snowfall in January
Phoenix, AZ

Average snowfall in January - Phoenix, AZ
  • Average snowfall in January: 0"

The month with the highest snowfall is September (0.04").
Months with the least snowfall are January, February, March, April, May, June, July, August, October, November and December (0").

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Average snowfall days in January
Phoenix, AZ

Average snowfall days in January - Phoenix, AZ
  • Average snowfall days in January: 0 days

The month with the highest number of snowfall days is September (0.1 days).
Months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).

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Average daylight in January /
Average sunshine in January
Phoenix, AZ

Average daylight in January / Average sunshine in January - Phoenix, AZ
  • Average daylight in January: 10.2h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in January: 7.1h

The month with the most sunshine is June (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.8h).

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Average sunshine days in January
Phoenix, AZ

Average sunshine days in January - Phoenix, AZ
  • Average sunshine days in January: 27.3 days

The month with the most sunshine days is May (29.2 days).
The month with the least sunshine days is July (21.1 days).

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Average UV index in January
Phoenix, AZ

Average UV index in January - Phoenix, AZ
  • Average UV index in January: 4

Months with the highest UV index are May, June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in January
Phoenix, AZ

Average cloud cover in January - Phoenix, AZ
  • Average cloud cover in January: 18

The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 5).

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Average visibility in January
Phoenix, AZ

Average visibility in January - Phoenix, AZ
  • Average visibility in January: 6mi

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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