Cool
Average highs are around 18°C, so pack for cooler days.
January verdict
Mixed for holiday weather
Average highs are around 18°C, so pack for cooler days. Sunshine averages 8.1h per day, so bright days are a strong part of the month. Rainfall averages 24mm, which is relatively low for holiday planning.

Monthly averages
Temp
18°C
Rain
24mm
Sun
8.1h
Weather score
49
Mixed
Cool
Average highs are around 18°C, so pack for cooler days.
Drier
Rainfall averages 24mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8.1h per day, so bright days are a strong part of the month.
Map
Compare Tucson, Arizona, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
January18°C average high
January has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
January24mm average rain
January sits near Tucson's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to June and September to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
January8.1 hours average sun
January is one of the less sunny months locally, though average sunshine is still strong by holiday standards.
Brightest monthsMay to June
This stretch has the strongest sunshine in the monthly averages.
January49 weather score
January is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsMay and October
These months have the strongest weather score in the monthly averages.
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