Phoenix
Arizona, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Phoenix, AZ

The city of Phoenix, Arizona, at dusk
The city of Phoenix, Arizona, at dusk
In January, Phoenix is generally pleasant with manageable temperatures between 39.2°F (4°C) and 66.2°F (19°C). It may seem cold, but the sun shines for up to nine hours in the day warming it up even more. January has relatively low humidity reading 34% and is also relatively wet. The rain gauge collects 0.9" (22.9mm), and the rain may fall for an average of four days during the month. Expect the rain to be accompanied by lightning strikes and thunder as well.

What is the temperature in January in Phoenix?

In Phoenix, in January, the average high-temperature is 67.3°F (19.6°C), and the average low-temperature is 45.7°F (7.6°C).

What is the average humidity in January in Phoenix?

In Phoenix, Arizona, the average relative humidity in January is 50.9%.

How much does it rain in Phoenix in January?

In Phoenix, Arizona, in January, it is raining for 4.1 days, with typically 0.9" (23.1mm) of accumulated precipitation.

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

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

How long on average sun shines in January in Phoenix?

The average sunshine in January in Phoenix is 8.3h.

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

Months with the lowest UV index in Phoenix, Arizona, are January and December, with an average maximum UV index of 3.

What is the UV index intensity in January in Phoenix?

In January, the average daily maximum UV index in Phoenix, Arizona, is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in January - Phoenix, AZ
  • Average high temperature in January: 67.2°F

The warmest month (with the highest average high temperature) is July (106.1°F).
The month with the lowest average high temperature is December (66°F).

  • Average low temperature in January: 45.6°F

The month with the highest average low temperature is July (83.5°F).
The coldest month (with the lowest average low temperature) is December (44.8°F).

Average humidity in January - Phoenix, AZ
  • Average humidity in January: 50.9%

The month with the highest relative humidity is December (51.8%).
The month with the lowest relative humidity is June (19.4%).

Average rainfall in January - Phoenix, AZ
  • Average rainfall in January: 0.9"

The wettest month (with the highest rainfall) is July (1.1").
The driest month (with the lowest rainfall) is June (0").

Average rainfall days in January - Phoenix, AZ
  • Average rainfall days in January: 4.1 days

The month with the highest number of rainy days is August (5 days).
The month with the lowest number of rainy days is June (0.5 days).

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 shortest days is December (Average daylight: 10h).

  • Average sunshine in January: 8.3h

The month with most sunshine is June (Average sunshine: 13.6h).
The month with least sunshine is December (Average sunshine: 7.9h).

Average UV index in January - Phoenix, AZ
  • Average UV index in January: 3

The month with the highest UV index is July (UV index 11).
Months with the lowest UV index are January and December (UV index 3).