Aztec, AZ climate
Aztec has warm winters and scorching summers, with very little rain. A typical July afternoon reaches 108°, a January night drops to 41°.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Aztec feels like
Winter
Spring
Summer
Fall
Aztec weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 70° | 41° | 0.6" | 51° – 61° |
| February | 74° | 44° | 0.8" | 53° – 65° |
| March | 81° | 50° | 0.3" | 59° – 72° |
| April | 88° | 54° | 0.1" | 66° – 75° |
| May | 96° | 62° | 0.0" | 74° – 84° |
| June | 105° | 70° | 0.0" | 82° – 91° |
| July | 108° | 79° | 0.4" | 87° – 96° |
| August | 107° | 79° | 0.5" | 89° – 98° |
| September | 102° | 72° | 0.4" | 85° – 91° |
| October | 91° | 60° | 0.4" | 71° – 81° |
| November | 79° | 48° | 0.3" | 56° – 69° |
| December | 69° | 40° | 0.4" | 51° – 58° |
| Year | 89° | 58° | 4.1" |
“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 Aztec
Aztec gets 4 inches of rain and melted snow a year. February is the wettest month and June the driest.
About 324 frost-free days a year
In half of years the last 32° night comes by January 25 and the first one by December 13. That leaves about 324 frost-free days for gardens, longer than 96% of U.S. towns.
Heating and cooling a home in Aztec
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Aztec, 22% of that work is heating and 78% 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.
How Aztec 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 Aztec averaged 2.1° warmer than the 1900s. The biggest change is in March (+2.8°). The shift is larger than in 96% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Aztec’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 56° to 69°. September is the most reliable, staying within 6°.
Common questions about Aztec’s climate
What is the coldest month in Aztec?
December, with a typical high of 69° and a low of 40°.
What is the hottest month in Aztec?
July, with a typical high of 108° and a low of 79°. About 184 days a year reach 90°.
When is the first frost in Aztec?
In half of years the first 32° night comes by December 13, and the last spring frost by January 25.
What is the rainiest month in Aztec?
February, with 0.8 inches of rain and melted snow. The year totals 4 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Aztec itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Dateland Whitewing Rch, AZ (12 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.