Saint Jo, TX climate
Saint Jo has mild winters and hot summers. A typical July afternoon reaches 94°, a January night drops to 32°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Saint Jo feels like
Winter
Spring
Summer
Fall
Saint Jo 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 | 54° | 32° | 1.8" | 0.4" | 5 | 0 | 39° – 51° |
| February | 58° | 36° | 2.2" | 0 | 5 | 0 | 39° – 56° |
| March | 66° | 44° | 3.2" | 0 | 5 | 0 | 50° – 63° |
| April | 74° | 51° | 3.3" | 0 | 5 | 0 | 57° – 69° |
| May | 81° | 61° | 5.2" | 0 | 8 | 0 | 67° – 77° |
| June | 89° | 68° | 4.2" | 0 | 6 | 0 | 75° – 85° |
| July | 94° | 72° | 2.6" | 0 | 4 | 0 | 79° – 91° |
| August | 94° | 72° | 2.6" | 0 | 5 | 0 | 77° – 92° |
| September | 86° | 64° | 3.4" | 0 | 5 | 0 | 72° – 82° |
| October | 76° | 54° | 4.0" | 0 | 6 | 0 | 59° – 69° |
| November | 64° | 43° | 2.6" | 0 | 4 | 0 | 47° – 60° |
| December | 55° | 34° | 2.4" | 0.3" | 4 | 0 | 37° – 49° |
| Year | 74° | 53° | 37.4" | 0.7" | 62 | 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 Saint Jo
Saint Jo gets 37 inches of rain and melted snow a year. May is the wettest month and January the driest. Rain or snow falls on about 62 days a year.
About 229 frost-free days a year
In half of years the last 32° night comes by March 24 and the first one by November 8. That leaves about 229 frost-free days for gardens, longer than 86% of U.S. towns.
Heating and cooling a home in Saint Jo
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Saint Jo, 54% of that work is heating and 46% 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 Saint Jo 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 Saint Jo averaged 0.6° warmer than the 1900s. The biggest change is in March (+1.8°). The shift is smaller than in 95% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Saint Jo’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 39° to 56°. May is the most reliable, staying within 9°.
Common questions about Saint Jo’s climate
What is the coldest month in Saint Jo?
January, with a typical high of 54° and a low of 32°.
What is the hottest month in Saint Jo?
August, with a typical high of 94° and a low of 72°. About 89 days a year reach 90°.
How much snow does Saint Jo get?
Almost none. A normal year brings 0.7 inches.
When is the first frost in Saint Jo?
In half of years the first 32° night comes by November 8, and the last spring frost by March 24.
What is the rainiest month in Saint Jo?
May, with 5.2 inches of rain and melted snow. The year totals 37 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Saint Jo itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Bowie, TX (21 mi, snow) and Bonita 7nw, TX (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.