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September Weather in Arizona United States

We show the September climate in Arizona by comparing the average September weather in 3 representative places: Phoenix, Tucson, and Flagstaff.

You can add or remove cities to customize the report to your liking. See all locations in Arizona.

Phoenix
United States
Tucson
United States
Flagstaff
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Average High and Low Temperature in September in Arizona

Average High and Low Temperature in September in ArizonaSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303020°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FAugOct8177721029995737166969491484439928736TucsonTucsonPhoenixPhoenix
The daily average high and low air temperature at 2 meters above the ground. The thin dotted lines are the corresponding perceived temperatures.

Phoenix in September

Average Hourly Temperature in Phoenix in SeptemberSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctcoolcomfortablewarmhotswelteringcomfortable

Tucson in September

Average Hourly Temperature in Tucson in SeptemberSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctcoolcomfortablewarmhotcomfortablecoolsweltering

Flagstaff in September

Average Hourly Temperature in Flagstaff in SeptemberSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctvery coldcoldcoolcoolcomfortablevery coldcoldwarm
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Chance of Clearer Skies in September in Arizona

Chance of Clearer Skies in September in ArizonaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOct808584738076FlagstaffFlagstaffTucsonTucsonPhoenixPhoenix
The percentage of time the sky is clear, mostly clear, or partly cloudy (i.e., less than 60% of the sky is covered by clouds).

Daily Chance of Precipitation in September in Arizona

Daily Chance of Precipitation in September in ArizonaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOct15117291712FlagstaffFlagstaffTucsonTucsonPhoenixPhoenix
The percentage of days in which precipitation is observed, excluding trace quantities.

Average Monthly Rainfall in September in Arizona

Average Monthly Rainfall in September in ArizonaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 inAugOct0.80.70.51.61.20.91.41.1FlagstaffFlagstaffTucsonTucsonPhoenixPhoenix
The average rainfall accumulated over the course of a sliding 31-day period centered on the day in question.

Average Monthly Snowfall in September in Arizona

Average Monthly Snowfall in September in ArizonaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300.0 in0.0 in0.2 in0.2 in0.4 in0.4 in0.6 in0.6 in0.8 in0.8 in1.0 in1.0 in1.2 in1.2 inAugOct0.1FlagstaffFlagstaff
The average snowfall accumulated over the course of a sliding 31-day period centered on the day in question.

Hours of Daylight in September in Arizona

Hours of Daylight in September in ArizonaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr0 hr4 hr4 hr8 hr8 hr12 hr12 hr16 hr16 hr20 hr20 hr24 hr24 hrAugOct12.812.411.8FlagstaffFlagstaffPhoenixPhoenix
The number of hours during which the Sun is at least partly above the horizon.

Chance of Muggy Conditions in September in Arizona

Chance of Muggy Conditions in September in ArizonaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOct1810314FlagstaffFlagstaffTucsonTucson
The percentage of time that is muggy, oppressive, or miserable (i.e., a dew point greater than 65°F).

Average Wind Speed in September in Arizona

Average Wind Speed in September in ArizonaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mphAugOct5.96.36.66.77.26.9FlagstaffFlagstaffTucsonTucsonPhoenixPhoenix
The average of mean hourly wind speeds at 10 meters above the ground.

Tourism Score in September in Arizona

Tourism Score in September in ArizonaSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303000224466881010AugOct5.16.27.36.37.04.53.5FlagstaffFlagstaffTucsonTucsonPhoenixPhoenix
The tourism score, which favors clear, rainless days with perceived temperatures between 65°F and 80°F.

Beach/Pool Score in September in Arizona

Beach/Pool Score in September in ArizonaSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303000224466881010AugOct7.37.97.37.26.02.31.81.1FlagstaffFlagstaffPhoenixPhoenix
The beach/pool score, which favors clear, rainless days with perceived temperatures between 75°F and 90°F.

Growing Season in September in Arizona

Growing Season in September in ArizonaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%20%20%40%40%60%60%80%80%100%100%AugOctFlagstaffFlagstaffTucsonTucsonPhoenixPhoenix
The percentage chance that a given day is within the growing season, defined as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Growing Degree Days in September in Arizona

Growing Degree Days in September in ArizonaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°F6,000°F6,000°F7,000°F7,000°F8,000°F8,000°FAugOctFlagstaffFlagstaffTucsonTucsonPhoenixPhoenix
The average growing degree days accumulated over the course of September, where growing degree days are defined as the integral of warmth above a base temperature (50°F in this case).

Average Daily Incident Shortwave Solar Energy in September in Arizona

Average Daily Incident Shortwave Solar Energy in September in ArizonaSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhAugOct6.56.25.7FlagstaffFlagstaffTucsonTucsonPhoenixPhoenix
The average daily shortwave solar energy reaching the ground per square meter.

This report illustrates the typical weather for Phoenix, Tucson, and Flagstaff, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

The details of the data sources used on this page vary between places and are discussed in detail on each place's dedicated page:

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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