Glenn Heights reaches 100° on about 22 days a year, more than 96% of U.S. towns
On a normal January night the air cools to about 37°. The gap between a January night and a July afternoon is 59°. In January, nights here are milder than in 84% of U.S. towns. From March to May and October to November, highs of 67–83° make it easy to spend the day outdoors.
A year in Glenn Heights at a glance
Each month’s typical high and low, and what it brings.
What stands out about Glenn Heights’ climate
Compared with towns across the U.S., with Glenn Heights’ place in Texas beside it.
What a year in Glenn Heights feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 253 frost-free days a year
In half of years the last 32° night comes by March 12 and the first by November 19. Frost and day counts come from NOAA’s station at Ferris, TX, 11 miles from the town’s center, 190 ft lower.
The 2023 USDA map puts Glenn Heights’ center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 18°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 40 inches of rain a year
May is the wettest month and July the driest. Rain falls on about 100 days a year. Snow is rare: about 0.0" in a normal year at Midlothian, TX, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Glenn Heights
46% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55° run from December through February.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Ferris, TX.
Living with Glenn Heights’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
253 frost-free days in zone 8b. The last frost comes by Mar 12 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 19.
Months with highs of 62–84° and lows of 40° or more: March, April, May, October and November. 0.3 miles of trails are waiting.
Parks & trails →Heat waves are 34% of the yearly building losses FEMA expects in Glenn Heights from natural hazards, the largest share. Normals are averages; the hazards page covers the extremes.
Natural hazards →Glenn Heights and its neighbors
Every town next door is within a degree of Glenn Heights in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Glenn Heights’, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Glenn Heights, TX | 37° | 95° | 40" | 0.0" |
| Clearlake, CA | 35° | 93° | 40" | 0.4" |
| Dublin, GA | 37° | 93° | 47" | 0.0" |
| Cayce, SC | 35° | 93° | 46" | 1.2" |
| Tecumseh, OK | 28° | 93° | 40" | 1.4" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Glenn Heights averaged 0.6° warmer than the 1900s. The biggest change is in January (+1.7°).
A smaller shift than in 96% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Glenn Heights compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Glenn Heights’ place among Texas’.
Glenn Heights weather by month
Highs, lows and precipitation from NOAA’s grid at Glenn Heights’ center; snow, wet days and snow on the ground from Midlothian, TX. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 57° | 37° | 2.6" | 0.0" | 7 | 0 | 42° – 55° |
| February | 61° | 40° | 2.8" | 0.0" | 9 | 0 | 42° – 59° |
| March | 68° | 48° | 3.6" | 0.0" | 10 | 0 | 52° – 65° |
| April | 76° | 55° | 3.6" | 0.0" | 9 | 0 | 60° – 71° |
| May | 83° | 64° | 4.7" | 0.0" | 10 | 0 | 70° – 79° |
| June | 91° | 71° | 4.1" | 0.0" | 10 | 0 | 78° – 86° |
| July | 95° | 75° | 2.1" | 0.0" | 6 | 0 | 81° – 90° |
| August | 96° | 74° | 2.4" | 0.0" | 7 | 0 | 79° – 93° |
| September | 89° | 67° | 3.2" | 0.0" | 7 | 0 | 74° – 85° |
| October | 79° | 56° | 4.7" | 0.0" | 9 | 0 | 63° – 72° |
| November | 67° | 46° | 2.9" | 0.0" | 8 | 0 | 51° – 62° |
| December | 58° | 38° | 3.1" | 0.0" | 8 | 0 | 40° – 53° |
| Year | 77° | 56° | 39.7" | 0.0" | 100 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 42° to 59°. June is the most reliable, staying within 8°.
Where Glenn Heights’ numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Glenn Heights’ center.
- Snow: Midlothian, TX.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Ferris, TX, 11 miles from the town’s center, 190 ft lower; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Glenn Heights’ climate
What is the weather like in Glenn Heights?
A typical July afternoon reaches 95°, a January night drops to 37°, and snow is almost unheard of. Milder January nights than 84% of U.S. towns; hotter July afternoons than 95% of U.S. towns.
How cold does it get in Glenn Heights in winter?
January nights average 37°. About 40 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 42°.
How much snow does Glenn Heights get?
About 0.0 inches in a normal winter at Midlothian, TX, so most winters see none.
How hot does it get in Glenn Heights?
July, with a typical high of 95° and a low of 75°. About 106 days a year reach 90° and 22 reach 100° (Ferris, TX).
When is the first and last frost in Glenn Heights?
In half of years the last spring frost (32°) comes by March 12 and the first fall frost by November 19, about 253 frost-free days, at Ferris, TX.
What growing zone is Glenn Heights in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 18°.
What is the best time of year to visit Glenn Heights?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Glenn Heights getting warmer?
Yes: 1991–2020 averaged 0.6° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 96% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Glenn Heights.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.