Climateby Month

Tucson, AZ climate by month

NOAA 1991-2020 normals · 2,481 ft elevation

Tucson has very hot summers and mild winters. Highs peak at 101°F in June and fall to 66°F in December. The wettest month is July (about 9 wet days) and the driest is May (about 1). Snow is rare. By our comfort score the best months are January, February and March.

Warmest month
101°F
June normal high
Coldest month
41°F
December normal low
Wet days a year
47
10.6 in of precipitation
Muggy days a year
10
dew point 65°F or higher

How warm is Tucson?

Normal highs range from 66°F in December to 101°F in June.

40°60°80°100°120° January: normal high 67°F (19°C), low 41°F (5°C) February: normal high 69°F (21°C), low 43°F (6°C) March: normal high 76°F (24°C), low 48°F (9°C) April: normal high 83°F (28°C), low 53°F (12°C) May: normal high 92°F (33°C), low 62°F (17°C) June: normal high 101°F (38°C), low 71°F (22°C) 101° 71° July: normal high 100°F (38°C), low 76°F (24°C) August: normal high 99°F (37°C), low 75°F (24°C) September: normal high 95°F (35°C), low 70°F (21°C) October: normal high 86°F (30°C), low 59°F (15°C) November: normal high 75°F (24°C), low 48°F (9°C) December: normal high 66°F (19°C), low 41°F (5°C) 66° 41° JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Tucson?

July has the most wet days (about 9); the year brings about 11 in of precipitation.

January: 4 wet days February: 4 wet days March: 3 wet days April: 2 wet days May: 1 wet days 1 June: 2 wet days July: 9 wet days 9 August: 9 wet days September: 4 wet days October: 3 wet days November: 3 wet days December: 4 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How humid is Tucson?

Muggy days peak in August, at about 4 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 0 muggy days June: 0 muggy days July: 4 muggy days August: 4 muggy days 4 September: 2 muggy days October: 0 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Tucson International Airport, 6.4 mi SSW of the city center.

How much daylight?

Daylight ranges from about 10.1 hours in December to 14.2 hours in June.

January: 10.3 hours of daylight February: 11.1 hours of daylight March: 12.0 hours of daylight April: 13.0 hours of daylight May: 13.8 hours of daylight June: 14.2 hours of daylight 14.2 July: 14.0 hours of daylight August: 13.3 hours of daylight September: 12.4 hours of daylight October: 11.4 hours of daylight November: 10.5 hours of daylight December: 10.1 hours of daylight 10.1 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Tucson, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 67°F41°F 0.8 in4 0.0 in 0 10.3 h
February 69°F43°F 0.8 in4 0.1 in 0 11.1 h
March 76°F48°F 0.6 in3 0.0 in 0 12.0 h
April 83°F53°F 0.2 in2 0.0 in 0 13.0 h
May 92°F62°F 0.2 in1 0.0 in 0 13.8 h
June 101°F71°F 0.2 in2 0.0 in 0 14.2 h
July 100°F76°F 2.2 in9 0.0 in 4 14.0 h
August 99°F75°F 2.0 in9 0.0 in 4 13.3 h
September 95°F70°F 1.3 in4 0.0 in 2 12.4 h
October 86°F59°F 0.7 in3 0.0 in 0 11.4 h
November 75°F48°F 0.6 in3 0.0 in 0 10.5 h
December 66°F41°F 1.0 in4 0.0 in 0 10.1 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Tucson

By our comfort score, the best months are January, February and March.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 711920
Feb 731720
Mar 711621
Apr 61918
May 462122
Jun 380129
Jul 350530
Aug 330429
Sep 340226
Oct 496213
Nov 691711
Dec 681830

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Tucson

The last spring frost typically comes around Feb 5, and the first fall frost around Dec 9, leaving 307 frost-free days in a typical year.

Frost and freeze dates for Tucson
Typical date1 year in 10
Last spring frost (32°F)Feb 5after Mar 2
First fall frost (32°F)Dec 9before Nov 21
Last hard freeze (28°F)Jan 11after Feb 17
First hard freeze (28°F)Dec 26before Nov 30
Frost-free season307 daysunder 274 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Tucson Intl Airport (USW00023160), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Arizona.

Hottest and coldest readings, 1991-2020

The highest reading was 116°F (June 20, 2017, and 1 other day); the lowest was 17°F (January 15, 2013).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Tucson

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain, snowfall, snow depth and frost dates: Tucson Intl Airport (USW00023160), 6.5 mi SSW of the city center, 2,549 ft (68 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Humidity and wind by hour and cloud cover: Davis Monthan AFB (USW00023109), 4.6 mi SSE of the city center, 2,654 ft (173 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Tucson International Airport (722740-23160), 6.4 mi SSW of the city center, 2,551 ft (70 ft higher than the city). Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error