Morristown, AZ climate
Morristown has mild winters and scorching summers, with very little rain. A typical July afternoon reaches 104°, a January night drops to 39°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Morristown feels like
Winter
Spring
Summer
Fall
Morristown 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 | 66° | 39° | 1.2" | 0 | 4 | 0 | 49° – 59° |
| February | 68° | 42° | 1.4" | 0 | 4 | 0 | 47° – 61° |
| March | 74° | 46° | 1.1" | 0 | 3 | 0 | 54° – 67° |
| April | 82° | 51° | 0.2" | 0 | 1 | 0 | 60° – 71° |
| May | 91° | 59° | 0.1" | 0 | 1 | 0 | 68° – 80° |
| June | 100° | 68° | 0.1" | 0 | 0 | 0 | 78° – 88° |
| July | 104° | 76° | 0.9" | 0 | 5 | 0 | 85° – 92° |
| August | 102° | 75° | 1.3" | 0 | 5 | 0 | 85° – 93° |
| September | 96° | 69° | 1.0" | 0 | 3 | 0 | 79° – 85° |
| October | 85° | 57° | 0.6" | 0 | 2 | 0 | 67° – 77° |
| November | 74° | 45° | 0.6" | 0 | 2 | 0 | 52° – 66° |
| December | 64° | 38° | 1.1" | 0 | 4 | 0 | 48° – 57° |
| Year | 84° | 55° | 9.6" | 0.0" | 36 | 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 Morristown
Morristown gets 10 inches of rain and melted snow a year. February is the wettest month and June the driest. Rain or snow falls on about 36 days a year.
About 306 frost-free days a year
In half of years the last 32° night comes by February 5 and the first one by December 11. That leaves about 306 frost-free days for gardens, longer than 95% of U.S. towns.
Heating and cooling a home in Morristown
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Morristown, 31% of that work is heating and 69% 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 Morristown 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 Morristown averaged 1.9° warmer than the 1900s. The biggest change is in March (+2.8°). The shift is larger than in 92% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Morristown’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 52° to 66°. September is the most reliable, staying within 6°.
Common questions about Morristown’s climate
What is the coldest month in Morristown?
December, with a typical high of 64° and a low of 38°.
What is the hottest month in Morristown?
July, with a typical high of 104° and a low of 76°. About 157 days a year reach 90°.
How much snow does Morristown get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Morristown?
In half of years the first 32° night comes by December 11, and the last spring frost by February 5.
What is the rainiest month in Morristown?
February, with 1.4 inches of rain and melted snow. The year totals 10 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Morristown itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Wittmann 1se, AZ (7 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.