United States, North America
Flagstaff is located in the United States with varying weather patterns throughout the year. Plan your visit to Flagstaffwith our accurate weather forecasts, including hourly updates, 7-day predictions, and real-time conditions. Whether you're a local or visitor, stay prepared for whatever weather the United States brings.
United States, United States of America
Friday, 28 August 2026 at 23:03
Overcast
Feels like 14°C
Humidity
84%
Wind
7.2 km/h SE
Visibility
10 km
Pressure
1021 mb
* WHAT...Dangerously hot conditions, with temperatures around 105 to 110 expected below 4000 feet. * WHERE...Yavapai County below 4000 feet; including the Verde Valley and Black Canyon City. * WHEN...Until 8 PM MST this evening. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed.
28°/ 14°
Overcast
Updated nowRain Chance
74%
Humidity
50%
Max Wind
37 km/h
Avg Temp
20°C
Sunrise
05:56 AM
Sunset
06:59 PM
06:00 am
17°
07:00 am
19°
08:00 am
22°
09:00 am
24°
10:00 am
26°
11:00 am
27°
12:00 pm
28°
01:00 pm
28°
02:00 pm
27°
03:00 pm
28°
04:00 pm
18°
05:00 pm
14°
06:00 pm
17°
07:00 pm
16°
08:00 pm
15°
09:00 pm
16°
10:00 pm
15°
11:00 pm
15°
12:00 am
18°
01:00 am
18°
02:00 am
18°
03:00 am
18°
04:00 am
18°
05:00 am
17°
Today
Sat, 29 Aug
UV Index
0 Low
Precipitation
0 mm
* WHAT...Dangerously hot conditions expected below 4000 feet, with daytime temperatures ranging from 93 to 97 degrees at Havasupai Gardens, to 106 to 110 degrees at Phantom Ranch. * WHERE...Lower elevations of the Grand Canyon. * WHEN...Until 8 PM MST this evening. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure.
This warning is reserved for only the hottest days of the year and is issued when temperatures are expected to rise to dangerous levels. Day hikers on Bright Angel Trail should descend no farther than 1 1/2 miles from the upper trailhead. Between the hours of 10 AM and 4 PM, hikers should be out of the canyon or at Havasupai Gardens or Bright Angel campgrounds, physical activity is discouraged. All hikers should have adequate gear, including a wide-brimmed hat, sunscreen, salty snacks, sufficient water, and electrolyte mix. Doubling your calorie intake helps maintain your energy. Hike smart. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Sun, 30 Aug
Mon, 31 Aug
Tue, 01 Sept
Wed, 02 Sept
Thu, 03 Sept
Fri, 04 Sept
Sat, 05 Sept
Sun, 06 Sept
Mon, 07 Sept
Tue, 08 Sept
Wed, 09 Sept
Thu, 10 Sept
Sun
Sunrise
05:56 AM
Sunset
06:59 PM
Moon
Moonrise
07:20 PM
Moonset
06:32 AM
Moon Phase
Full Moon
Illumination
98%
Good
Air quality is satisfactory
PM2.5
4.4 μg/m³
PM10
7.2 μg/m³
Ozone (O₃)
75.0 μg/m³
NO₂
5.6 μg/m³
SO₂
0.2 μg/m³
CO
114.0 μg/m³
