Photo: Cohee · CC BY 3.0More precipitation falls on Houston than on 95% of U.S. towns: 57 inches a year
High summer brings afternoon highs near 91°. Its July heat outdoes that of 82% of U.S. towns. Against 1901–2000, the average sits within a fraction of a degree. Radiators earn their keep from December to February, the months that average under 50°.
A year in Houston at a glance
Each month’s typical high and low, and what it brings.
What stands out about Houston’s climate
Compared with towns across the U.S., with Houston’s place in Mississippi beside it.
What a year in Houston feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 220 frost-free days a year
In half of years the last 32° night comes by March 28 and the first by November 1. Frost and day counts come from NOAA’s station at Houston, MS, 1.2 miles from the town’s center, at about the same height.
The 2023 USDA map puts Houston’s center in zone 8a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 12°. 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 57 inches of rain a year
April is the wettest month and September the driest. Rain falls on about 100 days a year. Snow is rare: about 0.8" in a normal year at Houston, MS, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Houston
60% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Houston, MS.
Living with Houston’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
220 frost-free days in zone 8a. The last frost comes by Mar 28 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 1.
Months with highs of 62–84° and lows of 40° or more: March, April, May, October and November. 0.0 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Houston from natural hazards, river flooding is the largest share (23%); heat waves, cold waves, winter storms and ice storms together are 18%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Houston and similar climates
TownRatings has no climate map of the towns around Houston yet.
Climates most like Houston’s, 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 |
|---|---|---|---|---|
| Houston, MS | 33° | 91° | 57" | 0.8" |
| Alexander City, AL | 33° | 91° | 56" | 0.7" |
| Leland, NC | 34° | 90° | 57" | 0.9" |
| Warren, AR | 34° | 92° | 56" | 1.5" |
| Grambling, LA | 35° | 93° | 57" | 0.4" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
About as warm as it used to be
The last 30 years in Houston averaged 0.2° warmer than the 1900s. The biggest change is in February (+0.9°).
A smaller shift than in all but 30 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 Houston compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Houston’s place among Mississippi’s.
Houston weather by month
Highs, lows and precipitation from NOAA’s grid at Houston’s center; snow, wet days and snow on the ground from Houston, MS. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 53° | 33° | 5.0" | 0.6" | 9 | 0 | 36° – 51° |
| February | 58° | 36° | 5.4" | 0.2" | 10 | 0 | 38° – 54° |
| March | 67° | 42° | 5.2" | 0.0" | 10 | 0 | 48° – 64° |
| April | 75° | 50° | 5.6" | 0.0" | 8 | 0 | 57° – 67° |
| May | 82° | 59° | 4.8" | 0.0" | 9 | 0 | 67° – 75° |
| June | 88° | 67° | 4.9" | 0.0" | 9 | 0 | 74° – 82° |
| July | 91° | 70° | 4.4" | 0.0" | 9 | 0 | 76° – 83° |
| August | 91° | 69° | 4.0" | 0.0" | 8 | 0 | 76° – 84° |
| September | 86° | 63° | 3.4" | 0.0" | 5 | 0 | 71° – 81° |
| October | 76° | 50° | 3.8" | 0.0" | 6 | 0 | 59° – 69° |
| November | 64° | 40° | 4.4" | 0.0" | 8 | 0 | 47° – 57° |
| December | 56° | 35° | 5.6" | 0.0" | 10 | 0 | 35° – 55° |
| Year | 74° | 51° | 56.5" | 0.8" | 100 | 1 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 35° to 55°. July is the most reliable, staying within 7°.
Where Houston’s 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 Houston’s center.
- Snow: Houston, MS (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Houston, MS, 1.2 miles from the town’s center, at about the same height; 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 Houston’s climate
What is the weather like in Houston?
A typical July afternoon reaches 91°, a January night drops to 33°, and snow is almost unheard of. Milder January nights than 76% of U.S. towns; hotter July afternoons than 82% of U.S. towns.
How cold does it get in Houston in winter?
January nights average 33°. About 70 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 36°.
How much snow does Houston get?
About 0.8 inches in a normal winter at Houston, MS, so most winters see none.
How hot does it get in Houston?
July, with a typical high of 91° and a low of 70°. About 54 days a year reach 90° (Houston, MS).
When is the first and last frost in Houston?
In half of years the last spring frost (32°) comes by March 28 and the first fall frost by November 1, about 220 frost-free days, at Houston, MS.
What growing zone is Houston in?
Zone 8a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 12°.
What is the best time of year to visit Houston?
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 Houston getting warmer?
Yes: 1991–2020 averaged 0.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than all but 30 U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Houston.
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.