Weather
Flagstaff, AZ Weather: Gentle Warming Trend for Labor Day Sept. 7
Flagstaff, AZ residents can expect a gentle warming trend this Labor Day, September 7. Prepare for mid 70s temperatures with a slight chance of storms.
By Country Herald News Desk · 2026-09-04T04:01:56.223Z
Flagstaff, AZ — Arizona residents can expect a slow, steady climb in temperatures leading into the holiday, offering ideal conditions for outdoor plans across the high country. While the mercury sits in a more moderate range this morning, the arrival of Monday, September 7, brings a gentle nudge toward warmer afternoon readings that will define the holiday experience.
Meteorologists are currently tracking a stable pattern that will keep afternoon highs consistently hovering in the mid to upper 70s throughout the upcoming period. By the time Monday afternoon arrives, residents and visitors planning travel along I 40 should expect mostly sunny skies with temperatures topping out near 77 degrees. It is a classic high country late summer day, perfect for those hoping to soak in the remaining warmth before the season shifts.
While the overall outlook is pleasant, the atmosphere will maintain a slight degree of volatility during the heat of the day. A 20 percent chance of showers and thunderstorms remains in the cards between 11 a.m. and 5 p.m. on Monday. These hit or miss cells are typical for this time of year and could develop quickly, so it is wise to keep an eye on the horizon if you are heading out for a holiday barbecue or a mountain hike.
For those hitting the road, light winds out of the southwest, reaching up to 14 mph, will generally have a minimal impact on travel. However, gusts could briefly pick up to 26 mph during any passing thunderstorm. Always ensure you have a way to receive weather updates if you are venturing into remote areas or planning extensive travel on Monday afternoon. The combination of sun and mild humidity will make for a quintessential late summer feel, so prepare accordingly for sun exposure.
As we look toward the start of the new week, the pattern holds steady, ensuring that the holiday remains largely comfortable for the region. Whether you are enjoying the local trails or relaxing at home, the weather looks to cooperate with your plans. Traveling this weekend? Tell us what conditions you're seeing in your part of the city.
For the latest hyperlocal forecast, radar, and active alerts for Flagstaff, visit the National Weather Service Flagstaff page .
Saturday: Mostly sunny with a slight chance of thunderstorms, High 76/Low 53 Sunday: Partly sunny with a chance of thunderstorms, High 76/Low 52 Labor Day: Mostly sunny with a slight chance of thunderstorms, High 77/Low 52 Tuesday: Sunny with a slight chance of thunderstorms, High 80/Low 55 Wednesday: Mostly sunny with a chance of thunderstorms, High 79/Low 55 Have something happening in your community? Hit the red Post/Submit button above to share events, classifieds, stories and local updates with Country Herald. SUPPORT LOCAL INDEPENDENT NEWS! Have a tip? Message us!