Phoenix weather in January
Long-run climate averages for Phoenix, AZ in January, plus what the forecast models say for the days ahead.
In January, Phoenix averages 62°F by day and 40°F at night. It is the wettest month of the year here.
January in Phoenix averages a daytime high of 62°F and an overnight low of 40°F, which reads as mild for this part of the world. It is the coldest month of the year here. It is also the wettest month, so build rain into any plan. Across the whole year Phoenix sees roughly 8 inches of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like - for that, see the live Phoenix forecast with every model compared and how much they currently agree.
Phoenix weather by month
what to expect in Phoenix through the yearHere is Phoenix's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to Phoenix by season.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Phoenix, scoring 94/100 on our CheckWeather Score, ahead of the American at 73. See the full US accuracy scoreboard for exactly how every model is tested.
Common questions
How warm is Phoenix in January?
Is January a good time to visit Phoenix?
Does it rain a lot in Phoenix in January?
Climate averages from ERA5 reanalysis. Model accuracy re-scored over a rolling 30 days. Page updated .