Dumas, Texas climate: Normal weather by month, frost dates and records
Dumas's normal year runs from 22°F January nights to 92°F July afternoons, with 17.7 inches of precipitation and 9 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.6°C, January lows of −5°C, July highs of 33°C, 450 mm of precipitation a year.
- NOAA stationDumas
- Station IDUSC00412617
- Location35.87°N 101.97°W
- Elevation3,655 ft (1,114 m)
- Population14,834
On October 23, the normal high in Dumas is 69°F and the normal low 40°F, and the chance of measurable rain or snow is 9%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Dumas.
- Jan 49° 22°
- Feb 53° 24°
- Mar 62° 32°
- Apr 70° 39°
- May 79° 50°
- Jun 89° 60°
- Jul 92° 65°
- Aug 90° 64°
- Sep 83° 56°
- Oct 72° 43°
- Nov 59° 31°
- Dec 49° 23°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Dumas each month?
July is the warmest month, with normal highs of 92°F; January the coldest, with normal lows of 22°F. The most precipitation falls in August (2.99 in), the least in January (0.39 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 49°F | 22°F | 35.6°F | 0.39 | 2.2 | 2 | <1 | 28 | 10 h |
| February | 53°F | 24°F | 38.7°F | 0.40 | 0.8 | 2 | <1 | 23 | 10 h 50 min |
| March | 62°F | 32°F | 46.9°F | 0.98 | 1.2 | 3 | <1 | 17 | 11 h 50 min |
| April | 70°F | 39°F | 54.4°F | 1.38 | 0.1 | 4 | 1 | 7 | 13 h |
| May | 79°F | 50°F | 64.4°F | 1.91 | 0.0 | 5 | 6 | 1 | 14 h |
| June | 89°F | 60°F | 74.6°F | 2.27 | 0.0 | 5 | 16 | <1 | 14 h 30 min |
| July | 92°F | 65°F | 78.7°F | 2.72 | 0.0 | 6 | 23 | <1 | 14 h 20 min |
| August | 90°F | 64°F | 77.1°F | 2.99 | 0.0 | 7 | 20 | <1 | 13 h 30 min |
| September | 83°F | 56°F | 69.6°F | 1.66 | 0.0 | 5 | 8 | <1 | 12 h 30 min |
| October | 72°F | 43°F | 57.3°F | 1.80 | 0.4 | 4 | 1 | 4 | 11 h 20 min |
| November | 59°F | 31°F | 45.1°F | 0.52 | 1.3 | 2 | <1 | 17 | 10 h 20 min |
| December | 49°F | 23°F | 36.1°F | 0.68 | 3.1 | 3 | <1 | 28 | 9 h 40 min |
| Year (annual) | 71°F | 42°F | 56.5°F | 17.70 | 9.1 | 47 | 73 | 124 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 10°C | −5°C | 2.0°C | 10 mm | 6 cm |
| February | 12°C | −4°C | 3.7°C | 10 mm | 2 cm |
| March | 17°C | 0°C | 8.3°C | 25 mm | 3 cm |
| April | 21°C | 4°C | 12.4°C | 35 mm | 0 cm |
| May | 26°C | 10°C | 18.0°C | 49 mm | 0 cm |
| June | 32°C | 16°C | 23.7°C | 58 mm | 0 cm |
| July | 33°C | 18°C | 25.9°C | 69 mm | 0 cm |
| August | 32°C | 18°C | 25.1°C | 76 mm | 0 cm |
| September | 28°C | 13°C | 20.9°C | 42 mm | 0 cm |
| October | 22°C | 6°C | 14.1°C | 46 mm | 1 cm |
| November | 15°C | 0°C | 7.3°C | 13 mm | 3 cm |
| December | 9°C | −5°C | 2.3°C | 17 mm | 8 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00412617; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Dumas?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, October has the fewest days with rain (4).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00412617.
When is the last frost in Dumas?
In Dumas, the last spring frost (32°F) comes after April 21 in half of years and after May 9 in one year in ten; the first autumn frost comes before October 24 in half of years and before October 5 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 211 year in 10 after May 9; 9 in 10 after April 4
- First autumn frost, half of years before
- October 241 year in 10 before October 5; 9 in 10 before November 5
NOAA puts the median frost-free season at 183 days, and the season without a hard freeze (28°F) at 203 days.
A hard freeze (28°F) comes after April 10 in half of springs and before November 2 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Dumas in zone 7a in ZIP code 79029, the nearest ZIP area.
Frost dates for every NOAA station in Texas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00412617; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Dumas?
In a normal year in Dumas, 73 days a year reach 90°F (9 of them 100°F or more), 124 nights fall to 32°F or colder and 47 days bring measurable precipitation.
- Days at 90°F or more
- 73a normal year
- Days at 100°F or more
- 9a normal year
- Nights at 32°F or colder
- 124a normal year
- Days that stay below freezing
- 12high of 32°F or less
- Days with 0.01 inch of precipitation
- 47a normal year
- Days with 1 inch of snow or more
- 3a normal year
The highest temperature in this station's record (since 1939) is 109°F, on June 28, 1980; the lowest is −18°F, on January 5, 1959.
The wettest calendar year on that record is 2015, with 31.13 in; the snowiest season is 1982–83, with 51.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00412617; records: ACIS (NOAA Regional Climate Centers), station USC00412617. Records use complete months only; a month missing more than three days is left out.
How sunny is Dumas?
Over a year 85% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Dumas, 5.2 kWh per square metre a day. June is the sunniest month (89%) and February the cloudiest (79%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 83% | 3.1 |
| February | 79% | 3.9 |
| March | 82% | 5.2 |
| April | 83% | 6.4 |
| May | 84% | 7.0 |
| June | 89% | 7.6 |
| July | 89% | 7.3 |
| August | 87% | 6.4 |
| September | 87% | 5.5 |
| October | 83% | 4.3 |
| November | 84% | 3.3 |
| December | 80% | 2.7 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Dumas need?
A normal year in Dumas brings 4,479 heating degree days, 17% fewer than the median U.S. place (5,373), and 1,428 cooling degree days, 57% more than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,137 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 910 | 0 |
| February | 735 | 0 |
| March | 564 | 2 |
| April | 330 | 13 |
| May | 119 | 99 |
| June | 8 | 296 |
| July | 2 | 425 |
| August | 3 | 378 |
| September | 46 | 184 |
| October | 271 | 31 |
| November | 597 | 1 |
| December | 896 | 0 |
| Year (annual) | 4,479 | 1,428 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00412617. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Dumas been warmer than normal lately?
Over 36 complete years from 1958 to 2020, the station's annual mean temperature rose at a fitted 3.0°F per century (+0.16°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Dumas's climate compare?
Dumas is warmer than 5 of the other 320 places with their own NOAA record in Texas, and wetter than 30. Across the 7,247 U.S. stations with normals, its annual mean of 56.5°F is warmer than 65%.
In the Köppen classification computed from these normals, Dumas is BSk: cold semi-arid steppe. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Dumas share this climate record?
2 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Cactus, TX3,149 people · 12 mi N
- Sunray, TX1,735 people · 13 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Dumas's climate
What is the coldest month in Dumas?
January, with a normal high of 49°F and a normal low of 22°F. The warmest is July (92°F by day, 65°F at night).
Does it snow in Dumas?
Yes: 9 inches in a normal year, falling on 4 days with 0.1 inch or more, the most in December (3.1 inches).
What is the rainiest month in Dumas?
August, with 2.99 in of precipitation in a normal year; the driest is January with 0.39 in.
What plant hardiness zone is Dumas in?
The USDA's 2023 map puts Dumas in zone 7a in ZIP code 79029, the nearest ZIP area.
How late can frost come in Dumas?
In half of years the last 32°F night comes after April 21; in one year in ten it comes after May 9. Waiting until May 9 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- Hartley, TX23 miles from this station, 55.8°F a year
- Channing, TX24 miles from this station, 56.5°F a year
- Sanford, TX27 miles from this station, 58.3°F a year
- Boys Ranch, TX29 miles from this station, 58.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made