Tucson Mountains, AZ climate
Tucson Mountains has mild winters and scorching summers, with very little rain. A typical July afternoon reaches 101°, a January night drops to 39°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Tucson Mountains feels like
Winter
Spring
Summer
Fall
Tucson Mountains weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 67° | 39° | 0.9" | 0 | 4 | 0 | 49° – 58° |
| February | 70° | 42° | 1.1" | 0 | 5 | 0 | 50° – 61° |
| March | 76° | 46° | 0.6" | 0 | 4 | 0 | 55° – 67° |
| April | 83° | 52° | 0.3" | 0 | 2 | 0 | 61° – 73° |
| May | 92° | 60° | 0.3" | 0 | 2 | 0 | 71° – 80° |
| June | 102° | 70° | 0.2" | 0 | 2 | 0 | 81° – 89° |
| July | 101° | 75° | 1.8" | 0 | 7 | 0 | 85° – 91° |
| August | 100° | 74° | 2.3" | 0 | 9 | 0 | 84° – 92° |
| September | 96° | 69° | 1.2" | 0 | 4 | 0 | 78° – 85° |
| October | 87° | 57° | 0.6" | 0 | 3 | 0 | 69° – 77° |
| November | 76° | 46° | 0.7" | 0 | 3 | 0 | 52° – 68° |
| December | 66° | 39° | 1.1" | 0 | 5 | 0 | 48° – 57° |
| Year | 85° | 56° | 11.1" | 0.0" | 48 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Tucson Mountains
Tucson Mountains gets 11 inches of rain and melted snow a year. August is the wettest month and June the driest. Rain or snow falls on about 48 days a year.
About 293 frost-free days a year
In half of years the last 32° night comes by February 11 and the first one by December 2. That leaves about 293 frost-free days for gardens, longer than 94% of U.S. towns.
Heating and cooling a home in Tucson Mountains
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Tucson Mountains, 29% of that work is heating and 71% is cooling, so air conditioning is the bigger bill.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Tucson Mountains and its neighbors
Tucson Mountains borders 2 towns with climate data. January nights across them vary by 0.9°. Tucson has the coldest January nights (38°) and Marana the hottest July afternoons (102°). Tucson Mountains’s January low is 39° and its July high 101°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Tucson Mountains compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Tucson Mountains averaged 1.3° warmer than the 1900s. The biggest change is in March (+2.4°). The shift is larger than in 60% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Tucson Mountains’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. November swings the most: between 1991 and 2020 its average temperature ranged from 52° to 68°. July is the most reliable, staying within 6°.
Common questions about Tucson Mountains’s climate
What is the coldest month in Tucson Mountains?
December, with a typical high of 66° and a low of 39°.
What is the hottest month in Tucson Mountains?
June, with a typical high of 102° and a low of 70°. About 167 days a year reach 90°.
How much snow does Tucson Mountains get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Tucson Mountains?
In half of years the first 32° night comes by December 2, and the last spring frost by February 11.
What is the rainiest month in Tucson Mountains?
August, with 2.3 inches of rain and melted snow. The year totals 11 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Tucson Mountains itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Tucson U Of A #1, AZ (5 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.