Photo: Billy Hathorn · CC BY-SA 3.0Shamrock reaches 100° on about 16 days a year, more than 94% of U.S. towns
On a normal January night the air cools to about 26°. It is a dry place: less rain and snow fall here than on 88% of U.S. towns. Warming shows here too: 1.0° more than in 1901–2000, led by March. Garden planting can start around April 9; autumn frost returns near October 30.
A year in Shamrock at a glance
Each month’s typical high and low, and what it brings.
What stands out about Shamrock’s climate
Compared with towns across the U.S., with Shamrock’s place in Texas beside it.
What a year in Shamrock feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 202 frost-free days a year
In half of years the last 32° night comes by April 9 and the first by October 30. Frost and day counts come from NOAA’s station at Shamrock #2, TX, 0.2 miles from the town’s center, at about the same height.
The 2023 USDA map puts Shamrock’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 5°. 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 9 inches of snow a winter
Snow, measured at Shamrock #2, TX, falls mostly in January. Precipitation (rain plus melted snow) adds up to 24 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 62 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Shamrock
70% 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 Shamrock #2, TX.
Living with Shamrock’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
202 frost-free days in zone 7a. The last frost comes by Apr 9 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 30.
Months with highs of 62–84° and lows of 40° or more: April, May and October. 0.2 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Shamrock from natural hazards, drought is the largest share (31%); heat waves, cold waves, winter storms and ice storms together are 10%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Shamrock and similar climates
TownRatings has no climate map of the towns around Shamrock yet.
Climates most like Shamrock’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 |
|---|---|---|---|---|
| Shamrock, TX | 26° | 95° | 24" | 9.1" |
| Enid, OK | 25° | 94° | 33" | 9.4" |
| Pratt, KS | 21° | 92° | 27" | 15" |
| Tucumcari, NM | 24° | 95° | 16" | 15" |
| Payson, AZ | 30° | 92° | 20" | 19" |
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 Shamrock averaged 1.0° warmer than the 1900s. The biggest change is in March (+2.4°).
A smaller shift than in 79% 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 Shamrock compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Shamrock’s place among Texas’.
Shamrock weather by month
Highs, lows and precipitation from NOAA’s grid at Shamrock’s center; snow, wet days and snow on the ground from Shamrock #2, TX. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 51° | 26° | 0.8" | 2.7" | 3 | 33° – 47° |
| February | 55° | 29° | 0.9" | 2.1" | 4 | 36° – 50° |
| March | 65° | 37° | 1.6" | 1.6" | 5 | 45° – 59° |
| April | 73° | 45° | 2.3" | 0.0" | 5 | 52° – 65° |
| May | 82° | 55° | 3.6" | 0.0" | 8 | 64° – 76° |
| June | 90° | 65° | 3.3" | 0.0" | 7 | 73° – 86° |
| July | 95° | 69° | 2.5" | 0.0" | 6 | 78° – 89° |
| August | 94° | 67° | 2.7" | 0.0" | 7 | 75° – 89° |
| September | 86° | 60° | 2.4" | 0.0" | 6 | 69° – 79° |
| October | 74° | 47° | 2.1" | 0.0" | 5 | 55° – 66° |
| November | 62° | 35° | 1.2" | 0.8" | 4 | 42° – 56° |
| December | 52° | 27° | 1.0" | 1.9" | 4 | 32° – 43° |
| Year | 73° | 47° | 24.3" | 9.1" | 62 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 45° to 59°. September is the most reliable, staying within 11°.
Where Shamrock’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 Shamrock’s center.
- Snow: Shamrock #2, TX (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Shamrock #2, TX, 0.2 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 Shamrock’s climate
What is the weather like in Shamrock?
A typical July afternoon reaches 95°, a January night drops to 26°, and about 9 inches of snow falls in a normal winter. Milder January nights than 64% of U.S. towns; hotter July afternoons than 94% of U.S. towns.
How cold does it get in Shamrock in winter?
January nights average 26°. About 97 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 33°.
How much snow does Shamrock get?
About 9.1 inches in a normal winter at Shamrock #2, TX, most of it in January.
How hot does it get in Shamrock?
July, with a typical high of 95° and a low of 69°. About 82 days a year reach 90° and 16 reach 100° (Shamrock #2, TX).
When is the first and last frost in Shamrock?
In half of years the last spring frost (32°) comes by April 9 and the first fall frost by October 30, about 202 frost-free days, at Shamrock #2, TX.
What growing zone is Shamrock in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 5°.
What is the best time of year to visit Shamrock?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Shamrock getting warmer?
Yes: 1991–2020 averaged 1.0° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 79% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Shamrock.
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.