Phoenix
Arizona, USA
Long-term weather forecast
Long-term weather forecast
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January weather forecast and Climate
Phoenix, AZ

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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 in the month. Expect the rain to be accompanied by lightning strikes and thunder as well.
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  • The 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).

  • The 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).

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  • The 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%).

  • The 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").

  • The 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).

  • The average daylight in January: 10h

Months with the longest days are May, June and July (Average daylight: 14h).
Months with shortest days are January, November and December (Average daylight: 10h).

  • The 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).

  • The 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).

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