Flagstaff typically begins to see measurable snowfall in late autumn, with first snow often occurring in November. Exact timing varies by year, but patterns suggest that snow can arrive as early as October in rare cases and is commonly seen from November through March, sometimes extending into April or even May with late-season events. For the 2025–26 season, forecasts from local and regional sources indicate a mix of occasional snow events with periods of dry weather, and the heaviest accumulations tending to cluster in February–March under certain atmospheric patterns. If you’re planning activities, monitor local updates from the National Weather Service and Arizona weather outlets for the most current, location-specific snow forecasts and any winter advisories.