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

Humidity

The average relative humidity in January is 42%.

Rainfall

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

Snowfall

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

Daylight

In Phoenix, the average length of the day in January is 10h and 14min.
On the first day of the month, sunrise is at 7:32 am and sunset at 5:31 pm. On the last day of January, sunrise is at 7:24 am and sunset at 5:58 pm MST.

Sunshine

The average sunshine in January in Phoenix is 7.1h.

UV index

In January, the average daily maximum UV index in Phoenix is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 4 in January transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 average humidity in January in Phoenix?

In Phoenix, Arizona, the average relative humidity in January 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?

January through August, October through December are months without snowfall in Phoenix, Arizona.

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

In Phoenix, Arizona, the average day length in January is 10h and 14min.

When is the sunrise / sunset in January in Phoenix?

In January, on the first day of the month, sunrise is at 7:32 am and sunset at 5:31 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:58 pm MST.

How long on average sun shines in January in Phoenix?

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

What is the UV index intensity in January in Phoenix?

In Phoenix, the average daily maximum UV index in January is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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"Hg

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

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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").
The 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).
The 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: 10h and 14min

The month with the longest days is June (Average daylight: 14h and 20min).
The month with the shortest days is December (Average daylight: 9h and 59min).

  • Average sunshine in January: 7h and 6min

The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).

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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

The 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

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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