New River, AZ climate
New River has warm winters and scorching summers, with very little rain. A typical July afternoon reaches 103°, a January night drops to 42°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in New River feels like
Winter
Spring
Summer
Fall
New River 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 | 65° | 42° | 1.6" | 0 | 5 | 0 | 50° – 59° |
| February | 67° | 44° | 1.8" | 0 | 5 | 0 | 49° – 62° |
| March | 74° | 48° | 1.4" | 0 | 4 | 0 | 53° – 68° |
| April | 81° | 53° | 0.4" | 0 | 2 | 0 | 61° – 72° |
| May | 90° | 61° | 0.2" | 0 | 2 | 0 | 69° – 81° |
| June | 100° | 70° | 0.1" | 0 | 1 | 0 | 79° – 89° |
| July | 103° | 77° | 1.1" | 0 | 4 | 0 | 87° – 93° |
| August | 101° | 76° | 1.7" | 0 | 5 | 0 | 85° – 94° |
| September | 96° | 71° | 1.1" | 0 | 3 | 0 | 78° – 86° |
| October | 85° | 59° | 0.8" | 0 | 3 | 0 | 68° – 77° |
| November | 73° | 49° | 0.9" | 0 | 3 | 0 | 53° – 67° |
| December | 64° | 41° | 1.4" | 0 | 4 | 0 | 49° – 58° |
| Year | 83° | 58° | 12.4" | 0.0" | 38 | 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 New River
New River gets 12 inches of rain and melted snow a year. February is the wettest month and June the driest. Rain or snow falls on about 38 days a year.
About 313 frost-free days a year
In half of years the last 32° night comes by February 4 and the first one by December 16. That leaves about 313 frost-free days for gardens, longer than 95% of U.S. towns.
Heating and cooling a home in New River
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In New River, 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.
New River and its neighbors
New River borders 3 towns with climate data. January nights across them vary by 1.3°. Cave Creek has the coldest January nights (41°) and Phoenix the hottest July afternoons (105°). New River’s January low is 42° and its July high 103°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How New River 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 New River averaged 2.0° warmer than the 1900s. The biggest change is in March (+3.0°). The shift is larger than in 94% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at New River’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 53° to 68°. July is the most reliable, staying within 6°.
Common questions about New River’s climate
What is the coldest month in New River?
December, with a typical high of 64° and a low of 41°.
What is the hottest month in New River?
July, with a typical high of 103° and a low of 77°. About 153 days a year reach 90°.
How much snow does New River get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in New River?
In half of years the first 32° night comes by December 16, and the last spring frost by February 4.
What is the rainiest month in New River?
February, with 1.8 inches of rain and melted snow. The year totals 12 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for New River itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Carefree, AZ (11 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.