Sulphur Springs, Texas climate: Normal weather by month, frost dates and records
Sulphur Springs's normal year runs from 34°F January nights to 94°F July afternoons, with 46.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 18.3°C, January lows of 1°C, July highs of 35°C, 1,181 mm of precipitation a year.
- NOAA stationSulphur Springs
- Station IDUSC00418743
- Location33.15°N 95.63°W
- Elevation495 ft (151 m)
- From the centerunder 1 mile
- Population16,891
On October 23, the normal high in Sulphur Springs is 75°F and the normal low 52°F, and the chance of measurable rain or snow is 28%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Sulphur Springs.
- Jan 55° 34°
- Feb 60° 38°
- Mar 67° 45°
- Apr 75° 52°
- May 82° 62°
- Jun 90° 71°
- Jul 94° 74°
- Aug 95° 73°
- Sep 89° 66°
- Oct 78° 54°
- Nov 66° 44°
- Dec 57° 36°
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 Sulphur Springs each month?
July is the warmest month, with normal highs of 94°F; January the coldest, with normal lows of 34°F. The most precipitation falls in October (4.90 in), the least in August (2.92 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 55°F | 34°F | 44.6°F | 3.30 | 10 | <1 | 15 | 10 h 10 min |
| February | 60°F | 38°F | 48.7°F | 3.63 | 10 | <1 | 10 | 11 h |
| March | 67°F | 45°F | 56.1°F | 4.43 | 10 | <1 | 4 | 12 h |
| April | 75°F | 52°F | 63.7°F | 4.31 | 9 | <1 | 1 | 13 h |
| May | 82°F | 62°F | 72.3°F | 4.30 | 10 | 4 | <1 | 13 h 50 min |
| June | 90°F | 71°F | 80.2°F | 4.27 | 8 | 18 | <1 | 14 h 20 min |
| July | 94°F | 74°F | 84.1°F | 3.03 | 6 | 27 | <1 | 14 h 10 min |
| August | 95°F | 73°F | 84.0°F | 2.92 | 6 | 26 | <1 | 13 h 20 min |
| September | 89°F | 66°F | 77.4°F | 2.96 | 6 | 16 | <1 | 12 h 30 min |
| October | 78°F | 54°F | 66.3°F | 4.90 | 8 | 3 | 1 | 11 h 20 min |
| November | 66°F | 44°F | 55.2°F | 3.98 | 9 | <1 | 6 | 10 h 30 min |
| December | 57°F | 36°F | 46.7°F | 4.47 | 11 | <1 | 13 | 10 h |
| Year (annual) | 76°F | 54°F | 64.9°F | 46.50 | 105 | 94 | 49 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 13°C | 1°C | 7.0°C | 84 mm |
| February | 15°C | 3°C | 9.3°C | 92 mm |
| March | 19°C | 7°C | 13.4°C | 113 mm |
| April | 24°C | 11°C | 17.6°C | 109 mm |
| May | 28°C | 17°C | 22.4°C | 109 mm |
| June | 32°C | 21°C | 26.8°C | 108 mm |
| July | 35°C | 23°C | 28.9°C | 77 mm |
| August | 35°C | 23°C | 28.9°C | 74 mm |
| September | 32°C | 19°C | 25.2°C | 75 mm |
| October | 26°C | 12°C | 19.1°C | 124 mm |
| November | 19°C | 7°C | 12.9°C | 101 mm |
| December | 14°C | 2°C | 8.2°C | 114 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Emory (21 miles away), gets 1 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00418743; 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 Sulphur Springs?
Normal highs sit between 65°F and 85°F in March, April, May, October and November. Of those, October has the fewest days with rain (8).
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 USC00418743.
When is the last frost in Sulphur Springs?
In Sulphur Springs, the last spring frost (32°F) comes after March 15 in half of years and after April 4 in one year in ten; the first autumn frost comes before November 14 in half of years and before October 29 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
- March 151 year in 10 after April 4; 9 in 10 after February 25
- First autumn frost, half of years before
- November 141 year in 10 before October 29; 9 in 10 before December 3
NOAA puts the median frost-free season at 245 days, and the season without a hard freeze (28°F) at 272 days.
A hard freeze (28°F) comes after March 2 in half of springs and before November 28 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Sulphur Springs in zone 8b in ZIP code 75482, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Sulphur Springs's NOAA station is in zone 8b: the coldest night of a typical year reaches 15°F (24 complete years).
Frost dates for every NOAA station in Texas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00418743; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 Sulphur Springs?
In a normal year in Sulphur Springs, 94 days a year reach 90°F (14 of them 100°F or more), 49 nights fall to 32°F or colder and 105 days bring measurable precipitation.
- Days at 90°F or more
- 94a normal year
- Days at 100°F or more
- 14a normal year
- Nights at 32°F or colder
- 49a normal year
- Days that stay below freezing
- 2high of 32°F or less
- Days with 0.01 inch of precipitation
- 105a normal year
The highest temperature in this station's record (since 1893) is 115°F, on August 10, 1969; the lowest is −4°F, on February 16, 2021.
The wettest calendar year on that record is 1957, with 71.09 in; the snowiest season is 1963–64, with 11.7 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00418743; records: ACIS (NOAA Regional Climate Centers), station USC00418743. Records use complete months only; a month missing more than three days is left out.
How sunny is Sulphur Springs?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Sulphur Springs, 4.6 kWh per square metre a day. July is the sunniest month (86%) and February the cloudiest (67%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 72% | 2.7 |
| February | 67% | 3.2 |
| March | 71% | 4.3 |
| April | 74% | 5.3 |
| May | 75% | 5.8 |
| June | 82% | 6.5 |
| July | 86% | 6.6 |
| August | 86% | 6.0 |
| September | 82% | 5.1 |
| October | 79% | 4.0 |
| November | 76% | 3.0 |
| December | 72% | 2.5 |
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 Sulphur Springs need?
A normal year in Sulphur Springs brings 2,514 heating degree days, 53% fewer than the median U.S. place (5,373), and 2,517 cooling degree days, 2.8 times the median (908). Four months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 6,139 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 634 | 2 |
| February | 463 | 5 |
| March | 300 | 24 |
| April | 117 | 76 |
| May | 18 | 244 |
| June | 0 | 456 |
| July | 0 | 591 |
| August | 0 | 589 |
| September | 5 | 375 |
| October | 90 | 129 |
| November | 316 | 22 |
| December | 571 | 4 |
| Year (annual) | 2,514 | 2,517 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00418743. 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 Sulphur Springs been warmer than normal lately?
2025 averaged 65.1°F, 0.2°F above the 1991-2020 normal of 64.9°F. 3 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 63.9°F | −1.0°F | 43.17 |
| 2022 | 64.8°F | −0.1°F | 36.47 |
| 2023 | 66.1°F | +1.2°F | 44.69 |
| 2024 | 66.4°F | +1.5°F | 49.07 |
| 2025 | 65.1°F | +0.2°F | 41.35 |
Over 67 complete years from 1949 to 2025, the station's annual mean temperature rose at a fitted 2.0°F per century (+0.11°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00418743; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Sulphur Springs's climate compare?
Sulphur Springs is warmer than 126 of the other 320 places with their own NOAA record in Texas, and wetter than 259. Across the 7,247 U.S. stations with normals, its annual mean of 64.9°F is warmer than 88%.
In the Köppen classification computed from these normals, Sulphur Springs is Cfa: temperate, no dry season, hot summer. 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 Sulphur Springs 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.
- Como, TX750 people · 11 mi SE
- Cumby, TX715 people · 12 mi W
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 Sulphur Springs's climate
What is the coldest month in Sulphur Springs?
January, with a normal high of 55°F and a normal low of 34°F. The warmest is July (94°F by day, 74°F at night).
Does it snow in Sulphur Springs?
Yes. NOAA publishes no 1991-2020 snowfall normal for Sulphur Springs's NOAA station; the nearest record that keeps one, Emory (21 miles away), records 1 inches of snow in a normal year.
What is the rainiest month in Sulphur Springs?
October, with 4.90 in of precipitation in a normal year; the driest is August with 2.92 in.
What plant hardiness zone is Sulphur Springs in?
The USDA's 2023 map puts Sulphur Springs in zone 8b in ZIP code 75482, the nearest ZIP area. By the same method at Sulphur Springs's NOAA station, the coldest night of a typical year reaches 15°F (24 years, 1991-2020): zone 8b.
How late can frost come in Sulphur Springs?
In half of years the last 32°F night comes after March 15; in one year in ten it comes after April 4. Waiting until April 4 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- Cooper, TX12 miles from this station, 64.6°F a year
- Emory, TX21 miles from this station, 63.4°F a year
- Lake Fork Reservoir, TX23 miles from this station, 64.8°F a year
- Mount Vernon, TX24 miles from this station, 64.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made