Tucson weather in December
December in Tucson: cool, a little rain, with clean air — a great time to visit.
#7 of 12 months in Tucson · #178 of 604 destinations to visit in December · comfort 79/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Tucson climate normals — December
| Daytime high | 19°C / 66°F | 🙂 cool |
|---|---|---|
| Nighttime low | 5°C / 41°F | |
| Feels like (high) | 15°C / 59°F | |
| Rainfall | 32 mm / 1.3 in | 🌦 some rain |
| Rainy days | 4 days | |
| Humidity | 53% | 🍃 comfortable |
| Dew point | 0°C / 32°F | |
| Sunshine | 8.4 h/day | |
| Daylight | 10.1 h | |
| Wind | 14 km/h / 9 mph | |
| Snowfall | 0.2 cm / 0.1 in | |
| Air quality (US AQI) | 29 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Tucson in December — FAQ
- Is December a good time to visit Tucson?
- December in Tucson: cool, a little rain, with clean air — a great time to visit. It ranks #7 of 12 months for Tucson on SeasonMap's comfort score (79/100).
- What is the weather like in Tucson in December?
- In December, Tucson averages a daily high of 18.8°C and a low of 5.1°C, with about 31.8 mm of rain over roughly 4.4 rainy days.
- What is the air quality in Tucson in December?
- Tucson has a mean US Air Quality Index of about 29 in December.