Red Rock, AZ climate
Red Rock has chilly winters and warm summers, with very little rain. A typical July afternoon reaches 92°, a January night drops to 19°.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Red Rock feels like
Winter
Spring
Summer
Fall
Red Rock 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 | 43° | 19° | 0.6" | 25° – 38° |
| February | 49° | 23° | 0.4" | 31° – 42° |
| March | 59° | 29° | 0.5" | 40° – 49° |
| April | 66° | 35° | 0.4" | 46° – 55° |
| May | 76° | 43° | 0.5" | 55° – 64° |
| June | 87° | 53° | 0.2" | 66° – 75° |
| July | 92° | 60° | 1.0" | 72° – 79° |
| August | 88° | 58° | 1.2" | 70° – 77° |
| September | 81° | 50° | 0.8" | 60° – 68° |
| October | 69° | 37° | 0.7" | 48° – 57° |
| November | 55° | 27° | 0.4" | 33° – 47° |
| December | 43° | 19° | 0.6" | 25° – 37° |
| Year | 67° | 38° | 7.1" |
“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 Red Rock
Red Rock gets 7 inches of rain and melted snow a year. August is the wettest month and June the driest.
About 163 frost-free days a year
In half of years the last 32° night comes by May 3 and the first one by October 17. That leaves about 163 frost-free days for gardens, shorter than 68% of U.S. towns.
Heating and cooling a home in Red Rock
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Red Rock, 89% of that work is heating and 11% is cooling, so the furnace matters far more than the air conditioner.
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 Red Rock 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 Red Rock averaged 1.6° warmer than the 1900s. The biggest change is in March (+2.8°). The shift is larger than in 78% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Red Rock’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 33° to 47°. July is the most reliable, staying within 8°.
Common questions about Red Rock’s climate
What is the coldest month in Red Rock?
December, with a typical high of 43° and a low of 19°.
What is the hottest month in Red Rock?
July, with a typical high of 92° and a low of 60°. About 22 days a year reach 90°.
When is the first frost in Red Rock?
In half of years the first 32° night comes by October 17, and the last spring frost by May 3.
What is the rainiest month in Red Rock?
August, with 1.2 inches of rain and melted snow. The year totals 7 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Red Rock itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Lukachukai, AZ (15 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.