Phoenix Weather in January
United States · Hot Desert climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
January in Phoenix sees average temperatures ranging from a low of 5.3°C (41.5°F) to a high of 18.2°C (64.8°F), with a mean of 11.4°C (52.5°F). Compared to the annual average of 23.8°C (74.8°F), this month is 12.4°C cooler than the yearly norm. This is the coldest month of the year, with average lows of 5.3°C (41.5°F). Precipitation averages 31.0mm, making it approximately 6.0mm wetter than the monthly average of 24.0mm. The city receives an average of 8.5 hours of sunshine per day during January, with relative humidity averaging 54.5%. Wind speeds reach an average maximum of 15.1 km/h. For travelers, this month offers a coldest month of the year experience in Phoenix, with wetter-than-average conditions compared to the rest of the year.
Phoenix's hot desert climate is one of the most extreme in the United States. I've studied the summer data and found that temperatures regularly exceed 40°C from June to August. The best time for visiting is November to March, when daytime temperatures are pleasant and the city's outdoor attractions are accessible. The winter months are mild and sunny, making Phoenix a popular winter destination.
January vs Adjacent Months
| Metric | December | January | February |
|---|---|---|---|
| Mean Temp | 13.0°C (55.4°F) | 11.4°C (52.5°F) | 13.4°C (56.1°F) |
| Rainfall | 35.2mm | 31.0mm | 27.3mm |
| Sunshine | 8.3 hrs | 8.5 hrs | 9.8 hrs |
| Humidity | 47.5% | 54.5% | 44.5% |
| Wind | 12.5 km/h | 15.1 km/h | 17.9 km/h |
| Rainy Days | 5.0 | 6.2 | 3.8 |
| Snowfall | 0.0 cm | 0.0 cm | 0.1 cm |
Seasonal Context
January falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Phoenix in January, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Phoenix in January?
The average temperature in Phoenix during January ranges from 5.3°C (41.5°F) to 18.2°C (64.8°F), with a mean of 11.4°C (52.5°F).
How much does it rain in Phoenix in January?
Phoenix receives an average of 31.0mm of precipitation in January, spread across approximately 6.2 rainy days.
What should I pack for Phoenix in January?
Based on January weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is January a good time to visit Phoenix?
January is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Phoenix
Cities with Similar January Climate (Hot Desert)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 33.45°, -112.07°. Timezone: America/Phoenix. Last updated: 2026-07-30.