Dilley, TX climate
Dilley has warm winters and hot summers, with very little rain. A typical July afternoon reaches 98°, a January night drops to 41°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Dilley feels like
Winter
Spring
Summer
Fall
Dilley 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° | 41° | 1.2" | 0 | 5 | 0 | 49° – 60° |
| February | 71° | 46° | 1.2" | 0 | 5 | 0 | 51° – 67° |
| March | 78° | 53° | 1.8" | 0 | 6 | 0 | 58° – 71° |
| April | 85° | 59° | 1.7" | 0 | 4 | 0 | 65° – 78° |
| May | 91° | 67° | 2.9" | 0 | 6 | 0 | 74° – 83° |
| June | 96° | 72° | 2.4" | 0 | 5 | 0 | 80° – 88° |
| July | 98° | 73° | 2.2" | 0 | 4 | 0 | 80° – 89° |
| August | 99° | 73° | 1.9" | 0 | 4 | 0 | 83° – 89° |
| September | 92° | 69° | 3.1" | 0 | 7 | 0 | 77° – 86° |
| October | 85° | 60° | 2.1" | 0 | 5 | 0 | 70° – 78° |
| November | 75° | 50° | 1.3" | 0 | 5 | 0 | 57° – 68° |
| December | 67° | 43° | 1.3" | 0.2" | 6 | 0 | 48° – 59° |
| Year | 84° | 59° | 23.0" | 0.2" | 61 | 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 Dilley
Dilley gets 23 inches of rain and melted snow a year. September is the wettest month and January the driest. Rain or snow falls on about 61 days a year.
About 296 frost-free days a year
In half of years the last 32° night comes by February 16 and the first one by December 6. That leaves about 296 frost-free days for gardens, longer than 95% of U.S. towns.
Heating and cooling a home in Dilley
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Dilley, 26% of that work is heating and 74% 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 Dilley 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 Dilley averaged 1.0° warmer than the 1900s. The biggest change is in February (+2.4°). The shift is smaller than in 66% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Dilley’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 51° to 67°. August is the most reliable, staying within 7°.
Common questions about Dilley’s climate
What is the coldest month in Dilley?
January, with a typical high of 66° and a low of 41°.
What is the hottest month in Dilley?
August, with a typical high of 99° and a low of 73°. About 140 days a year reach 90°.
How much snow does Dilley get?
Almost none. A normal year brings 0.2 inches.
When is the first frost in Dilley?
In half of years the first 32° night comes by December 6, and the last spring frost by February 16.
What is the rainiest month in Dilley?
September, with 3.1 inches of rain and melted snow. The year totals 23 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Dilley itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Dilley, TX (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.