Climate and Average Weather Year Round in Arizona United States

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

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Phoenix
Arizona, United States
Tucson
Arizona, United States
Flagstaff
Arizona, United States
Map

Average High and Low Temperature in Arizona

Average High and Low Temperature in ArizonaJanFebMarAprMayJunJulAugSepOctNovDec20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°F854510765774210254198141NowNowPhoenixPhoenixTucsonTucsonFlagstaffFlagstaff
The daily average high and low air temperature at 2 meters above the ground.
HighJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix 67°F71°F78°F86°F95°F104°F106°F104°F99°F88°F75°F66°F
Tucson 66°F70°F76°F83°F92°F100°F100°F97°F94°F85°F74°F66°F
Flagstaff 43°F46°F52°F59°F68°F78°F80°F77°F72°F62°F51°F43°F
LowJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix 46°F49°F54°F61°F70°F79°F85°F84°F77°F65°F53°F46°F
Tucson 42°F45°F49°F55°F63°F72°F77°F75°F70°F60°F49°F43°F
Flagstaff 20°F22°F26°F31°F37°F45°F53°F52°F44°F34°F26°F20°F

Phoenix

Average Hourly Temperature in PhoenixJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowcoldcoldcoolcoolwarmwarmhotswelteringcomfortablecoldcoldcomfortable

Tucson

Average Hourly Temperature in TucsonJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowcoldcoldcoolcoolwarmhotswelteringcoldcoldcomfortablevery coldcomfortable

Flagstaff

Average Hourly Temperature in FlagstaffJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingfreezingvery coldcoldcoolcoolcomfortablewarmvery coldfreezingfreezing
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 Arizona

Chance of Clearer Skies in ArizonaJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%8662558459NowNowPhoenixPhoenixTucsonTucsonFlagstaffFlagstaff
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).
Clearer SkiesJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix 66%63%70%75%79%84%70%71%84%80%72%66%
Tucson 65%63%70%76%79%83%62%63%80%80%72%66%
Flagstaff 63%60%65%71%74%81%68%68%82%77%69%64%

Daily Chance of Precipitation in Arizona

Daily Chance of Precipitation in ArizonaJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%19142339PhoenixPhoenixTucsonTucsonFlagstaffFlagstaff
The percentage of days in which precipitation is observed, excluding trace quantities.
Days of Precip.JanFebMarAprMayJunJulAugSepOctNovDec
Phoenix 3.2d3.1d3.0d1.3d0.6d0.7d4.4d5.6d3.2d2.0d2.3d3.3d
Tucson 3.6d3.4d3.0d1.5d1.1d2.4d10.6d11.7d5.3d2.8d2.5d3.9d
Flagstaff 4.5d4.7d4.8d2.6d2.2d2.1d9.5d10.9d5.5d3.6d3.3d4.3d

Average Monthly Rainfall in Arizona

Average Monthly Rainfall in ArizonaJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in1.10.12.21.90.3PhoenixPhoenixTucsonTucsonFlagstaffFlagstaff
The average rainfall accumulated over the course of a sliding 31-day period centered on the day in question.
RainfallJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix 1.0″1.1″0.9″0.3″0.1″0.1″0.6″1.0″0.7″0.5″0.7″1.0″
Tucson 1.0″1.0″0.7″0.3″0.1″0.4″1.9″2.0″1.2″0.7″0.6″1.0″
Flagstaff 0.6″0.8″0.6″0.4″0.4″0.3″1.5″1.9″1.4″0.9″0.8″0.7″

Average Monthly Snowfall in Arizona

Average Monthly Snowfall in ArizonaJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 in8 in8 in7.4NowNowPhoenixPhoenixTucsonTucsonFlagstaffFlagstaff
The average snowfall accumulated over the course of a sliding 31-day period centered on the day in question.
SnowfallJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix 0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″
Tucson 0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″
Flagstaff 7.3″6.8″5.5″2.2″0.3″0.0″0.0″0.0″0.0″0.4″2.2″5.7″

Hours of Daylight in Arizona

Hours of Daylight in ArizonaJanFebMarAprMayJunJulAugSepOctNovDec4 hr4 hr6 hr6 hr8 hr8 hr10 hr10 hr12 hr12 hr14 hr14 hr16 hr16 hr18 hr18 hr20 hr20 hr14.49.9NowNowPhoenixPhoenixFlagstaffFlagstaff
The number of hours during which the Sun is at least partly above the horizon.
DaylightJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix 10.2h11.0h12.0h13.1h13.9h14.3h14.1h13.3h12.3h11.3h10.4h10.0h
Tucson 10.3h11.1h12.0h13.0h13.8h14.2h14.0h13.3h12.3h11.3h10.5h10.1h
Flagstaff 10.1h11.0h12.0h13.1h14.1h14.5h14.2h13.4h12.3h11.2h10.3h9.8h

Chance of Muggy Conditions in Arizona

Chance of Muggy Conditions in ArizonaJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%24NowNowPhoenixPhoenixTucsonTucsonFlagstaffFlagstaff
The percentage of time that is muggy, oppressive, or miserable (i.e., a dew point greater than 65°F).
Muggy daysJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix 0.0d0.0d0.0d0.0d0.0d0.5d5.0d6.9d3.1d0.3d0.0d0.0d
Tucson 0.0d0.0d0.0d0.0d0.0d0.6d4.5d5.9d2.2d0.1d0.0d0.0d
Flagstaff 0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d

Average Wind Speed in Arizona

Average Wind Speed in ArizonaJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mph10 mph10 mph7.55.78.75.39.1NowNowPhoenixPhoenixTucsonTucsonFlagstaffFlagstaff
The average of mean hourly wind speeds at 10 meters above the ground.
Wind Speed (mph)JanFebMarAprMayJunJulAugSepOctNovDec
Phoenix 6.96.76.97.47.47.36.55.86.36.66.86.8
Tucson 8.38.18.38.68.47.86.15.56.67.58.28.3
Flagstaff 7.17.88.49.08.78.26.35.66.56.87.17.1

Tourism Score in Arizona

Tourism Score in ArizonaJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.72.67.46.20.1NowNowPhoenixPhoenixTucsonTucsonFlagstaffFlagstaff
The tourism score, which favors clear, rainless days with perceived temperatures between 65°F and 80°F.

Beach/Pool Score in Arizona

Beach/Pool Score in ArizonaJanFebMarAprMayJunJulAugSepOctNovDec002244668810108.10.33.6NowNowPhoenixPhoenixTucsonTucsonFlagstaffFlagstaff
The beach/pool score, which favors clear, rainless days with perceived temperatures between 75°F and 90°F.

Growing Season in Arizona

Growing Season in ArizonaJanFebMarAprMayJunJulAugSepOctNovDec0%0%20%20%40%40%60%60%80%80%100%100%NowNowPhoenixPhoenixTucsonTucsonFlagstaffFlagstaff
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 Arizona

Growing Degree Days in ArizonaJanFebMarAprMayJunJulAugSepOctNovDec2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°FNowNowPhoenixPhoenixTucsonTucsonFlagstaffFlagstaff
The average growing degree days accumulated over the course of the year, 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 Arizona

Average Daily Incident Shortwave Solar Energy in ArizonaJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh8.53.1NowNowPhoenixPhoenixTucsonTucsonFlagstaffFlagstaff
The average daily shortwave solar energy reaching the ground per square meter.
Solar Energy (kWh)JanFebMarAprMayJunJulAugSepOctNovDec
Phoenix 3.54.45.97.38.18.47.46.76.25.03.83.2
Tucson 3.74.76.17.58.38.36.96.36.15.24.03.4
Flagstaff 3.44.45.97.28.18.57.36.56.15.03.73.1

This report illustrates the typical weather for Phoenix, Tucson, and Flagstaff year round, 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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