San Jon, NM climate
San Jon has chilly winters and hot summers, with very little rain. A typical July afternoon reaches 94°, a January night drops to 24°, and about 17 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in San Jon feels like
Winter
Spring
Summer
Fall
San Jon 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 | 53° | 24° | 0.6" | 4.3" | 3 | 2 | 31° – 44° |
| February | 58° | 27° | 0.4" | 1.8" | 2 | 2 | 34° – 50° |
| March | 66° | 34° | 1.0" | 2.1" | 3 | 0 | 45° – 56° |
| April | 74° | 41° | 1.0" | 0.9" | 3 | 0 | 49° – 63° |
| May | 83° | 51° | 1.6" | 0.1" | 5 | 0 | 63° – 73° |
| June | 92° | 61° | 2.1" | 0 | 6 | 0 | 71° – 80° |
| July | 94° | 65° | 2.8" | 0 | 7 | 0 | 75° – 84° |
| August | 92° | 64° | 2.7" | 0 | 7 | 0 | 74° – 83° |
| September | 85° | 56° | 1.6" | 0 | 5 | 0 | 65° – 77° |
| October | 74° | 44° | 1.6" | 0.5" | 4 | 0 | 54° – 66° |
| November | 62° | 32° | 0.6" | 2.0" | 3 | 1 | 42° – 53° |
| December | 53° | 24° | 0.7" | 5.4" | 3 | 3 | 32° – 43° |
| Year | 74° | 44° | 16.6" | 17.1" | 51 | 8 |
“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 San Jon
San Jon gets 17 inches of rain and melted snow a year. July is the wettest month and February the driest. Rain or snow falls on about 51 days a year. Snow covers the ground about 8 days of the year.
About 187 frost-free days a year
In half of years the last 32° night comes by April 18 and the first one by October 24. That leaves about 187 frost-free days for gardens, longer than 60% of U.S. towns.
Heating and cooling a home in San Jon
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In San Jon, 66% of that work is heating and 34% 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 San Jon 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 San Jon averaged 1.2° warmer than the 1900s. The biggest change is in March (+2.2°). The shift is larger than in 50% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at San Jon’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 34° to 50°. July is the most reliable, staying within 9°.
Common questions about San Jon’s climate
What is the coldest month in San Jon?
January, with a typical high of 53° and a low of 24°.
What is the hottest month in San Jon?
July, with a typical high of 94° and a low of 65°. About 90 days a year reach 90°.
How much snow does San Jon get?
About 17 inches in a normal winter, most of it in December.
When is the first frost in San Jon?
In half of years the first 32° night comes by October 24, and the last spring frost by April 18.
What is the rainiest month in San Jon?
July, with 2.8 inches of rain and melted snow. The year totals 17 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for San Jon itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at San Jon, NM (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.