Sierra Vista, AZ climate
Sierra Vista has mild winters and warm summers, with very little rain. A typical July afternoon reaches 91°, a January night drops to 32°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Sierra Vista feels like
Winter
Spring
Summer
Fall
Sierra Vista 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 | 61° | 32° | 0.9" | 0.4" | 4 | 0 | 42° – 51° |
| February | 64° | 35° | 0.7" | 0 | 4 | 0 | 44° – 54° |
| March | 70° | 39° | 0.7" | 0 | 2 | 0 | 49° – 60° |
| April | 77° | 44° | 0.2" | 0 | 1 | 0 | 55° – 66° |
| May | 85° | 51° | 0.2" | 0 | 1 | 0 | 62° – 72° |
| June | 94° | 61° | 0.5" | 0 | 2 | 0 | 72° – 80° |
| July | 91° | 65° | 3.5" | 0 | 12 | 0 | 75° – 82° |
| August | 89° | 64° | 3.3" | 0 | 11 | 0 | 74° – 82° |
| September | 87° | 59° | 1.9" | 0 | 5 | 0 | 69° – 75° |
| October | 79° | 48° | 0.7" | 0 | 3 | 0 | 61° – 68° |
| November | 69° | 38° | 0.5" | 0 | 2 | 0 | 46° – 61° |
| December | 60° | 32° | 1.0" | 0 | 3 | 0 | 42° – 51° |
| Year | 77° | 47° | 14.2" | 0.4" | 51 | 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 Sierra Vista
Sierra Vista gets 14 inches of rain and melted snow a year. July is the wettest month and May the driest. Rain or snow falls on about 51 days a year.
About 216 frost-free days a year
In half of years the last 32° night comes by April 5 and the first one by November 9. That leaves about 216 frost-free days for gardens, longer than 81% of U.S. towns.
Heating and cooling a home in Sierra Vista
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Sierra Vista, 65% of that work is heating and 35% is cooling.
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.
Sierra Vista and its neighbors
Sierra Vista borders 3 towns with climate data. January nights across them vary by 1.1°. Huachuca City has the coldest January nights (31°) and Whetstone the hottest July afternoons (93°). Sierra Vista’s January low is 32° and its July high 91°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Sierra Vista 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 Sierra Vista averaged 1.5° warmer than the 1900s. The biggest change is in March (+2.3°). The shift is larger than in 70% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Sierra Vista’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 46° to 61°. July is the most reliable, staying within 7°.
Common questions about Sierra Vista’s climate
What is the coldest month in Sierra Vista?
December, with a typical high of 60° and a low of 32°.
What is the hottest month in Sierra Vista?
June, with a typical high of 94° and a low of 61°. About 87 days a year reach 90°.
How much snow does Sierra Vista get?
Almost none. A normal year brings 0.4 inches.
When is the first frost in Sierra Vista?
In half of years the first 32° night comes by November 9, and the last spring frost by April 5.
What is the rainiest month in Sierra Vista?
July, with 3.5 inches of rain and melted snow. The year totals 14 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Sierra Vista itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Sierra Vista, AZ (3 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.