Flagstaff weather in January
January in Flagstaff: cold, a little rain, with clean air — a fair time to visit.
#12 of 12 months in Flagstaff · #637 of 897 destinations to visit in January · comfort 59/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Flagstaff in January
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Flagstaff climate normals — January
| Daytime high | 6°C / 42°F | 🧥 cold |
|---|---|---|
| Nighttime low | -4°C / 25°F | |
| Rainfall | 53 mm / 2.1 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 66% | 💧 humid |
| Dew point | -7°C / 20°F | |
| Sunshine | 8.4 h/day | |
| Daylight | 10.1 h | |
| Wind | 14 km/h / 9 mph | |
| Snowfall | 33.7 cm / 13.3 in | |
| Air quality (US AQI) | 40 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Flagstaff in January — FAQ
- Is January a good time to visit Flagstaff?
- January in Flagstaff: cold, a little rain, with clean air — a fair time to visit. It ranks #12 of 12 months for Flagstaff on SeasonMap's comfort score (59/100).
- What is the weather like in Flagstaff in January?
- In January, Flagstaff averages a daily high of 5.7°C and a low of -3.8°C, with about 53.2 mm of rain over roughly 7.8 rainy days.
- What is the air quality in Flagstaff in January?
- Flagstaff has a mean US Air Quality Index of about 40 in January.
- Does it snow in Flagstaff in January?
- Flagstaff sees roughly 33.7 cm of snowfall in January.