Congress, AZ climate
Congress has mild winters and scorching summers, with very little rain. A typical July afternoon reaches 100°, a January night drops to 36°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Congress feels like
Winter
Spring
Summer
Fall
Congress 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 | 63° | 36° | 1.5" | 0 | 4 | 0 | 45° – 56° |
| February | 65° | 38° | 1.7" | 0 | 4 | 0 | 44° – 58° |
| March | 71° | 42° | 1.2" | 0 | 4 | 0 | 50° – 64° |
| April | 78° | 46° | 0.4" | 0 | 2 | 0 | 56° – 67° |
| May | 87° | 54° | 0.2" | 0 | 1 | 0 | 64° – 76° |
| June | 97° | 63° | 0.1" | 0 | 1 | 0 | 74° – 84° |
| July | 100° | 71° | 1.4" | 0 | 3 | 0 | 81° – 88° |
| August | 98° | 70° | 1.9" | 0 | 5 | 0 | 80° – 89° |
| September | 93° | 63° | 1.2" | 0 | 3 | 0 | 74° – 81° |
| October | 82° | 52° | 0.8" | 0 | 2 | 0 | 63° – 73° |
| November | 71° | 41° | 0.7" | 0 | 2 | 0 | 49° – 63° |
| December | 61° | 35° | 1.2" | 0.1" | 3 | 0 | 44° – 54° |
| Year | 80° | 51° | 12.3" | 0.1" | 31 | 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 Congress
Congress gets 12 inches of rain and melted snow a year. August is the wettest month and June the driest. Rain or snow falls on about 31 days a year.
About 254 frost-free days a year
In half of years the last 32° night comes by March 7 and the first one by November 20. That leaves about 254 frost-free days for gardens, longer than 91% of U.S. towns.
Heating and cooling a home in Congress
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Congress, 41% of that work is heating and 59% 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.
How Congress 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 Congress averaged 1.8° warmer than the 1900s. The biggest change is in March (+2.9°). The shift is larger than in 87% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Congress’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. March swings the most: between 1991 and 2020 its average temperature ranged from 50° to 64°. July is the most reliable, staying within 7°.
Common questions about Congress’s climate
What is the coldest month in Congress?
December, with a typical high of 61° and a low of 35°.
What is the hottest month in Congress?
July, with a typical high of 100° and a low of 71°. About 162 days a year reach 90°.
How much snow does Congress get?
Almost none. A normal year brings 0.1 inches.
When is the first frost in Congress?
In half of years the first 32° night comes by November 20, and the last spring frost by March 7.
What is the rainiest month in Congress?
August, with 1.9 inches of rain and melted snow. The year totals 12 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Congress itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Wickenburg, AZ (14 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.