January Weather in Tempe, United States

Last updated: June 24, 2025

The average temperature in Tempe, United States during January is a mild 12°C (54°F), with minimums dropping to -1°C (30°F) and maximums reaching 29°C (84°F). Expect about 25 mm (1.0 in) of precipitation spread across 4 days, contributing to an average humidity of 76%.

January Temperature in Tempe

In January in Tempe, the average temperature is 12°C (54°F). Maximum temperatures can reach 29°C (84°F), while minimum temperatures can drop as low as -1°C (30°F). This variation makes it ideal for travelers to pack a range of clothing to accommodate both warm days and chilly nights.

January Weather in Tempe: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Tempe, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tempe, January typically has an average temperature of 12°C (54°F), with highs reaching up to 29°C (84°F) and lows dropping to around -1°C (30°F).

Data source: Temperature data for Tempe generated using information from the Copernicus Climate Change Service.

January Precipitation in Tempe

In Tempe in January, the precipitation amount is 25 mm (1.0 in) over the course of 4 days.

January Precipitation Trends in Tempe

The chart displays monthly precipitation patterns in Tempe, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Tempe, January typically receives around 25 mm (1.0 inches) of precipitation spread over approximately 4 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Tempe

In Tempe in January, humidity is 76%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket enveloping you, making outdoor activities a bit uncomfortable and requiring frequent hydration while exploring.

January Average Humidity in Tempe

This chart illustrates the average monthly humidity levels in Tempe, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Tempe is approximately 76%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Tempe

In Tempe in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Tempe for better planning.

Maximum UV Index Levels in Tempe for January

The chart shows the monthly maximum UV Index (UVI) for Tempe in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Tempe typically reaches 4, which falls under the moderate exposure category.

Data source: Tempe January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Tempe Compares to Other Months

Weather in Tempe varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Tempe, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Tempe, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	25 mm (1.0 inches)	76%	moderate
February Weather	14°C (57°F)	37 mm (1.4 inches)	79%	high
March Weather	18°C (65°F)	29 mm (1.2 inches)	67%	very high
April Weather	24°C (75°F)	1 mm (0.1 inches)	55%	very high
May Weather	28°C (82°F)	2 mm (0.1 inches)	40%	extreme
June Weather	34°C (93°F)	2 mm (0.1 inches)	33%	extreme
July Weather	35°C (95°F)	37 mm (1.4 inches)	34%	extreme
August Weather	35°C (95°F)	39 mm (1.5 inches)	48%	extreme
September Weather	32°C (89°F)	27 mm (1.1 inches)	64%	very high
October Weather	24°C (76°F)	26 mm (1.0 inches)	67%	high
November Weather	18°C (66°F)	21 mm (0.8 inches)	77%	moderate
December Weather	13°C (55°F)	23 mm (0.9 inches)	82%	moderate