Photo: Walter Curran Mendenhall · Public domainGrandfalls reaches 100° on about 51 days a year, more than all but 148 U.S. towns
Deep winter brings January lows near 31°. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 67° apart. It is a dry place: less rain and snow fall here than on 95% of U.S. towns. Seedlings are safe outdoors from about April 2, with the first autumn frost due around November 3.
A year in Grandfalls at a glance
Each month’s typical high and low, and what it brings.
What stands out about Grandfalls’ climate
Compared with towns across the U.S., with Grandfalls’ place in Texas beside it.
What a year in Grandfalls feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 214 frost-free days a year
In half of years the last 32° night comes by April 2 and the first by November 3. Frost and day counts come from NOAA’s station at Grandfalls 3sse, TX, 3 miles from the town’s center, at about the same height.
The 2023 USDA map puts Grandfalls’ center in zone 8a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 13°. 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 1 inches of snow a winter
Snow, measured at Grandfalls 3sse, TX, falls mostly in January. Precipitation (rain plus melted snow) adds up to 12 inches a year; September is the wettest month and March the driest. Rain or snow falls on about 39 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Grandfalls
50% 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 Grandfalls 3sse, TX.
Living with Grandfalls’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
214 frost-free days in zone 8a. The last frost comes by Apr 2 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 3.
Months with highs of 62–84° and lows of 40° or more: March and October.
Parks & trails →Of the yearly building losses FEMA expects in Grandfalls from natural hazards, river flooding is the largest share (51%); heat waves, cold waves, winter storms and ice storms together are 7%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Grandfalls and similar climates
TownRatings has no climate map of the towns around Grandfalls yet.
Climates most like Grandfalls’, 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 |
|---|---|---|---|---|
| Grandfalls, TX | 31° | 98° | 12" | 1.4" |
| Cottonwood, AZ | 31° | 99° | 14" | 1.0" |
| Ivins, UT | 32° | 100° | 11" | 1.2" |
| Rosamond, CA | 33° | 98° | 8" | 1.2" |
| Sunland Park, NM | 32° | 96° | 9" | 2.0" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Grandfalls averaged 1.8° warmer than the 1900s. The biggest change is in March (+3.0°).
A bigger shift than in 82% 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 Grandfalls compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Grandfalls’ place among Texas’.
Grandfalls weather by month
Highs, lows and precipitation from NOAA’s grid at Grandfalls’ center; snow, wet days and snow on the ground from Grandfalls 3sse, TX. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 62° | 31° | 0.5" | 0.9" | 3 | 0 | 41° – 52° |
| February | 68° | 36° | 0.5" | 0.1" | 3 | 0 | 47° – 58° |
| March | 76° | 43° | 0.5" | 0.0" | 2 | 0 | 54° – 65° |
| April | 84° | 50° | 0.7" | 0.0" | 2 | 0 | 60° – 73° |
| May | 92° | 61° | 1.6" | 0.0" | 4 | 0 | 70° – 82° |
| June | 98° | 69° | 1.5" | 0.0" | 4 | 0 | 80° – 90° |
| July | 98° | 72° | 1.4" | 0.0" | 4 | 0 | 80° – 89° |
| August | 98° | 71° | 1.5" | 0.0" | 4 | 0 | 81° – 89° |
| September | 91° | 64° | 1.7" | 0.0" | 5 | 0 | 72° – 83° |
| October | 82° | 52° | 1.2" | 0.0" | 3 | 0 | 64° – 73° |
| November | 71° | 40° | 0.6" | 0.0" | 2 | 0 | 50° – 61° |
| December | 62° | 32° | 0.7" | 0.4" | 3 | 0 | 43° – 51° |
| Year | 82° | 52° | 12.4" | 1.4" | 39 | 0 |
How much a month can swing
A normal is an average. April swings the most: from 1991 to 2020 its average ranged from 60° to 73°. December is the most reliable, staying within 7°.
Where Grandfalls’ 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 Grandfalls’ center.
- Snow: Grandfalls 3sse, TX.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Grandfalls 3sse, TX, 3 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 Grandfalls’ climate
What is the weather like in Grandfalls?
A typical July afternoon reaches 98°, a January night drops to 31°, and about 1 inches of snow falls in a normal winter. Milder January nights than 74% of U.S. towns; hotter July afternoons than all but 180 U.S. towns.
How cold does it get in Grandfalls in winter?
January nights average 31°. About 76 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 41°.
How much snow does Grandfalls get?
About 1.4 inches in a normal winter at Grandfalls 3sse, TX, most of it in January, with snow on the ground about 0 days a year.
How hot does it get in Grandfalls?
July, with a typical high of 98° and a low of 72°. About 145 days a year reach 90° and 51 reach 100° (Grandfalls 3sse, TX).
When is the first and last frost in Grandfalls?
In half of years the last spring frost (32°) comes by April 2 and the first fall frost by November 3, about 214 frost-free days, at Grandfalls 3sse, TX.
What growing zone is Grandfalls in?
Zone 8a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 13°.
What is the best time of year to visit Grandfalls?
By one simple rule (highs of 62–84° and lows of 40° or more), March and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Grandfalls getting warmer?
Yes: 1991–2020 averaged 1.8° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 82% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Grandfalls.
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.