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Flagstaff, Arizona 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Flagstaff AZ
National Weather Service Forecast for: Flagstaff AZ
Issued by: National Weather Service Flagstaff, AZ
Updated: 10:22 am MST Jul 26, 2025
 
Today

Today: Mostly sunny, with a high near 81. Southwest wind 15 to 17 mph, with gusts as high as 28 mph.
Mostly Sunny

Tonight

Tonight: Partly cloudy, with a low around 49. Southwest wind 5 to 8 mph becoming calm.
Partly Cloudy

Sunday

Sunday: Mostly sunny, with a high near 84. Southwest wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.
Mostly Sunny

Sunday
Night
Sunday Night: Partly cloudy, with a low around 53. Southwest wind 5 to 8 mph becoming calm.
Partly Cloudy

Monday

Monday: A 20 percent chance of showers and thunderstorms after 11am.  Mostly sunny, with a high near 87. Southwest wind 7 to 10 mph, with gusts as high as 17 mph.
Slight Chance
T-storms
Monday
Night
Monday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 11pm.  Partly cloudy, with a low around 56. Southwest wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 20%.
Slight Chance
T-storms then
Partly Cloudy
Tuesday

Tuesday: A 40 percent chance of showers and thunderstorms after 11am.  Mostly sunny, with a high near 85. Calm wind becoming south 5 to 7 mph in the morning. Winds could gust as high as 18 mph.
Chance
T-storms
Tuesday
Night
Tuesday Night: A 30 percent chance of showers and thunderstorms before 11pm.  Partly cloudy, with a low around 55. Southwest wind around 6 mph becoming calm  after midnight.
Chance
Showers then
Partly Cloudy
Wednesday

Wednesday: A 50 percent chance of showers and thunderstorms after 11am.  Partly sunny, with a high near 82. Calm wind becoming southwest 5 to 8 mph in the morning. Winds could gust as high as 18 mph.
Chance
T-storms
Hi 81 °F Lo 49 °F Hi 84 °F Lo 53 °F Hi 87 °F Lo 56 °F Hi 85 °F Lo 55 °F Hi 82 °F

 

Today
 
Mostly sunny, with a high near 81. Southwest wind 15 to 17 mph, with gusts as high as 28 mph.
Tonight
 
Partly cloudy, with a low around 49. Southwest wind 5 to 8 mph becoming calm.
Sunday
 
Mostly sunny, with a high near 84. Southwest wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
 
Partly cloudy, with a low around 53. Southwest wind 5 to 8 mph becoming calm.
Monday
 
A 20 percent chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 87. Southwest wind 7 to 10 mph, with gusts as high as 17 mph.
Monday Night
 
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 11pm. Partly cloudy, with a low around 56. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Tuesday
 
A 40 percent chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 85. Calm wind becoming south 5 to 7 mph in the morning. Winds could gust as high as 18 mph.
Tuesday Night
 
A 30 percent chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 55. Southwest wind around 6 mph becoming calm after midnight.
Wednesday
 
A 50 percent chance of showers and thunderstorms after 11am. Partly sunny, with a high near 82. Calm wind becoming southwest 5 to 8 mph in the morning. Winds could gust as high as 18 mph.
Wednesday Night
 
A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Partly cloudy, with a low around 54. West wind 3 to 6 mph. Chance of precipitation is 40%.
Thursday
 
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 80. Light southwest wind becoming south 5 to 9 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
 
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 53. Southwest wind around 6 mph becoming calm in the evening.
Friday
 
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81. Calm wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 20 mph.

 

Forecast from NOAA-NWS for Flagstaff AZ.

Weather Forecast Discussion
552
FXUS65 KFGZ 261743
AFDFGZ

Area Forecast Discussion
National Weather Service Flagstaff AZ
1043 AM MST Sat Jul 26 2025

.SYNOPSIS...Warmer, dry, and breezy conditions set in through
this weekend. Chances for showers and thunderstorms will slowly
spread north and west across the region next week.

&&

.DISCUSSION...An upper low centered over northern California this
morning will continue to produce dry southwesterly flow across our
region through the weekend. Winds are forecast to peak today, with
gusts reaching 25-35 mph especially from Flagstaff north and west.
Along with relative humidity dropping to 7-15%, this will result
in some near-critical fire weather. The flow aloft weakens slightly
on Sunday though it will remain breezy.

Monday through Friday - the strong ridge that has been impacting
the eastern 2/3 of the country will expand westward and result in
warmer daytime temperatures and lighter winds. The flow pattern
should also be more favorable for a slow return of moisture from
the southeast. Models have been indicating an easterly wave
tracking along the southern periphery of the ridge and into our
region late Monday through mid week, and this could act to further
enhance moisture return and storm chances. However, the latest
couple of model cycles have held on to more west coast troughing,
and the track of the wave could stay farther east than previously
expected (previous model cycles showed the wave moving directly
over our forecast area, now shifted more into New Mexico/far
eastern AZ). So while we are forecasting a slow return to shower
and thunderstorm chances, there is still uncertainty on how
extensive this will be and how far west the moisture reaches.

&&

.AVIATION...Saturday 26/18Z through Sunday 27/18Z...Primarily VFR
conditions. Smoke layers and reduced VIS bringing MVFR conditions
just north of KGCN to KPGA through the period. Winds are southwest
10-20 kts gusting to 25-30 kts today, then light and VRB or
terrain driven overnight.

OUTLOOK...Sunday 27/18Z through Tuesday 29/18Z...Primarily VFR
conditions. Smoke layers and reduced VIS bringing MVFR conditions
just north of KGCN to KPGA through the period. Isolated
-SHRA/-TSRA possible Monday afternoon mainly KFLG-KRQE southward.
 Winds are southwest 10-15 kts gusting to 20-25 kts on Sunday,
 then 5-10 kts with gusting to 20 kts on Monday. Winds are light
 and VRB during the overnight periods.

&&

.FIRE WEATHER...Today and Sunday...Warm and dry, with locally
windy conditions. Areas of near critical fire weather conditions
today , mainly over portions of Coconino County. Daytime winds
southwest 10 to 20 mph each day, with gusts from 25 to 35 mph.
Highest wind gusts today, with some decrease Sunday. Minimum
relative humidity values 7 to 15 percent.

Monday through Wednesday...Chances for showers and thunderstorms
slowly spreading back northwest. Daytime southwest winds 10 to 15
mph with gusts to 20 to 25 mph. Minimum relative humidity values
will slowly rise through the period, most places above 15 percent by
Wednesday.

&&

.FGZ WATCHES/WARNINGS/ADVISORIES...None.

&&

$$

PUBLIC...JJ
AVIATION...Lewandowski
FIRE WEATHER...JJ

For Northern Arizona weather information visit
weather.gov/flagstaff
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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