Shamrock, TX climate
Shamrock has chilly winters and hot summers. A typical July afternoon reaches 95°, a January night drops to 26°, and about 9 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Shamrock feels like
Winter
Spring
Summer
Fall
Shamrock 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 51° | 26° | 0.8" | 2.7" | 3 | 33° – 47° |
| February | 55° | 29° | 0.9" | 2.1" | 4 | 36° – 50° |
| March | 65° | 37° | 1.6" | 1.6" | 5 | 45° – 59° |
| April | 73° | 45° | 2.3" | 0 | 5 | 52° – 65° |
| May | 82° | 55° | 3.6" | 0 | 8 | 64° – 76° |
| June | 90° | 65° | 3.3" | 0 | 7 | 73° – 86° |
| July | 95° | 69° | 2.5" | 0 | 6 | 78° – 89° |
| August | 94° | 67° | 2.7" | 0 | 7 | 75° – 89° |
| September | 86° | 60° | 2.4" | 0 | 6 | 69° – 79° |
| October | 74° | 47° | 2.1" | 0 | 5 | 55° – 66° |
| November | 62° | 35° | 1.2" | 0.8" | 4 | 42° – 56° |
| December | 52° | 27° | 1.0" | 1.9" | 4 | 32° – 43° |
| Year | 73° | 47° | 24.3" | 9.1" | 62 |
“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 Shamrock
Shamrock gets 24 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 202 frost-free days a year
In half of years the last 32° night comes by April 9 and the first one by October 30. That leaves about 202 frost-free days for gardens, longer than 73% of U.S. towns.
Heating and cooling a home in Shamrock
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Shamrock, 70% of that work is heating and 30% 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 Shamrock 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 Shamrock averaged 1.0° warmer than the 1900s. The biggest change is in March (+2.4°). The shift is smaller than in 71% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Shamrock’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 45° to 59°. September is the most reliable, staying within 11°.
Common questions about Shamrock’s climate
What is the coldest month in Shamrock?
January, with a typical high of 51° and a low of 26°.
What is the hottest month in Shamrock?
July, with a typical high of 95° and a low of 69°. About 82 days a year reach 90°.
How much snow does Shamrock get?
About 9 inches in a normal winter, most of it in January.
When is the first frost in Shamrock?
In half of years the first 32° night comes by October 30, and the last spring frost by April 9.
What is the rainiest month in Shamrock?
May, with 3.6 inches of rain and melted snow. The year totals 24 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Shamrock itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Shamrock #2, TX (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.