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
January, like December, in Phoenix, Arizona, is another enjoyable winter month, with average temperature ranging between min 47.5°F (8.6°C) and max 64.2°F (17.9°C).

Temperature

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

Humidity

The average relative humidity in January is 42%.

Rainfall

In Phoenix, during January, the rain falls for 3 days and regularly aggregates up to 0.28" (7mm) of precipitation. In Phoenix, during the entire year, the rain falls for 44.6 days and collects up to 5.04" (128mm) of precipitation.

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 January is 7.1h.

UV index

The average daily maximum UV index in January is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. 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.

What is the temperature in January in Phoenix?

The average high-temperature, in January, in Phoenix, Arizona, is 64.2°F (17.9°C), while 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 is 42%.

How much does it rain in Phoenix in January?

In Phoenix, in January, it is raining for 3 days, with typically 0.28" (7mm) of accumulated precipitation.

When it does not snow in Phoenix?

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

How many hours of daylight does Phoenix have in January?

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 7.1h.

What is the UV index intensity in January in Phoenix?

The average daily maximum UV index in January in Phoenix, Arizona, is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to the Sun's UV rays.
Average temperature in January - Phoenix, AZ
  • Average high temperature in January: 17.9°C

The warmest month (with the highest average high temperature) is July (39.8°C).
The month with the lowest average high temperature is December (17.2°C).

  • Average low temperature in January: 8.6°C

The month with the highest average low temperature is August (29.3°C).
The coldest month (with the lowest average low temperature) is January (8.6°C).

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%).

Average rainfall in January - Phoenix, AZ
  • Average rainfall in January: 7mm

The wettest month (with the highest rainfall) is July (19mm).
Driest months (with the lowest rainfall) are May and June (2mm).

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 lowest number of rainy days is June (0.8 days).

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

The month with the highest snowfall is September (1mm).
Months with the lowest snowfall are January, February, March, April, May, June, July, August, October, November and December (0mm).

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 lowest number of snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 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: 7.1h

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

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).