Van Alstyne, TX climate
Van Alstyne has mild winters and hot summers. A typical July afternoon reaches 94°, a January night drops to 34°.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Van Alstyne feels like
Winter
Spring
Summer
Fall
Van Alstyne weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 54° | 34° | 2.6" | 40° – 52° |
| February | 58° | 38° | 2.8" | 39° – 56° |
| March | 66° | 45° | 3.9" | 50° – 63° |
| April | 74° | 53° | 3.9" | 58° – 69° |
| May | 81° | 62° | 5.2" | 68° – 76° |
| June | 89° | 70° | 3.8" | 76° – 84° |
| July | 94° | 73° | 2.5" | 79° – 89° |
| August | 94° | 73° | 2.6" | 78° – 91° |
| September | 87° | 65° | 3.4" | 72° – 83° |
| October | 77° | 54° | 4.5" | 60° – 71° |
| November | 65° | 44° | 3.2" | 48° – 60° |
| December | 55° | 36° | 3.5" | 37° – 51° |
| Year | 74° | 54° | 41.8" |
“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 Van Alstyne
Van Alstyne gets 42 inches of rain and melted snow a year. May is the wettest month and July the driest.
About 241 frost-free days a year
In half of years the last 32° night comes by March 17 and the first one by November 15. That leaves about 241 frost-free days for gardens, longer than 89% of U.S. towns.
Heating and cooling a home in Van Alstyne
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Van Alstyne, 50% of that work is heating and 50% 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 Van Alstyne 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 Van Alstyne averaged 0.7° warmer than the 1900s. The biggest change is in January (+1.8°). The shift is smaller than in 89% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Van Alstyne’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°. June is the most reliable, staying within 8°.
Common questions about Van Alstyne’s climate
What is the coldest month in Van Alstyne?
January, with a typical high of 54° and a low of 34°.
What is the hottest month in Van Alstyne?
August, with a typical high of 94° and a low of 73°. About 88 days a year reach 90°.
When is the first frost in Van Alstyne?
In half of years the first 32° night comes by November 15, and the last spring frost by March 17.
What is the rainiest month in Van Alstyne?
May, with 5.2 inches of rain and melted snow. The year totals 42 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Van Alstyne itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Mckinney Municipal Airport, TX (16 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.