Flagstaff, AZ – Spotty thunderstorms could begin developing over Flagstaff by midday Thursday, with storm chances continuing through at least Saturday night as monsoon moisture slowly returns to northern Arizona.
According to the National Weather Service in Flagstaff, there’s a 20% chance of showers and thunderstorms beginning after 11 a.m. Thursday, increasing to a 50% chance by Saturday. While rain amounts are expected to remain light, lightning and gusty outflow winds up to 25 mph could impact outdoor activities and travel.
Thursday: Partly cloudy with a high near 90°F. A slight chance of storms after 11 a.m., with gusts up to 24 mph.
Friday: Continued thunder chances with highs in the upper 80s. Afternoon winds from the southwest may reach 22 mph.
Saturday: Highest chance for storms at 50%, especially after 11 a.m. Cooler with highs in the mid-80s and breezy conditions.
Sunday: Rain chances begin tapering off, but isolated storms still possible after 11 a.m. High near 84°F.
Monday: Mostly sunny, drier, and slightly warmer with highs near 87°F and lower wind gusts.
While no official watches or warnings are in place yet, residents and visitors should remain alert for rapid changes in conditions, especially in the afternoons. More consistent storm development could return next week as monsoon moisture deepens across the region.
Five Day Forecast for Flagstaff, AZ
- Thursday: High 90°F / Low 55°F – Slight chance of storms after 11 a.m.
- Friday: High 88°F / Low 54°F – 30% chance of storms, breezy
- Saturday: High 86°F / Low 54°F – 50% chance of thunderstorms
- Sunday: High 84°F / Low 53°F – 20% chance of storms
- Monday: High 87°F / Low 53°F – Mostly sunny, dry conditions
