Stillhouse Hollow Dam, Texas climate: Climate normals at a NOAA weather station
Stillhouse Hollow Dam's normal year runs from 36°F January nights to 96°F August afternoons, with 37.0 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 19.2°C, January lows of 2°C, August highs of 36°C, 939 mm of precipitation a year.
- NOAA stationStillhouse Hollow Dam
- Station IDUSC00418646
- Location31.04°N 97.53°W
- Elevation706 ft (215 m)
On October 23, the normal high in Stillhouse Hollow Dam is 78°F and the normal low 53°F, and the chance of measurable rain or snow is 25%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Stillhouse Hollow Dam.
- Jan 60° 36°
- Feb 64° 39°
- Mar 71° 46°
- Apr 78° 54°
- May 85° 63°
- Jun 91° 70°
- Jul 95° 72°
- Aug 96° 72°
- Sep 90° 66°
- Oct 81° 56°
- Nov 69° 46°
- Dec 61° 38°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Stillhouse Hollow Dam each month?
August is the warmest month, with normal highs of 96°F; January the coldest, with normal lows of 36°F. The most precipitation falls in May (4.85 in), the least in July (1.85 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 60°F | 36°F | 47.8°F | 2.55 | 8 | <1 | 12 | 10 h 20 min |
| February | 64°F | 39°F | 51.7°F | 2.29 | 8 | <1 | 7 | 11 h |
| March | 71°F | 46°F | 58.3°F | 3.26 | 9 | <1 | 2 | 12 h |
| April | 78°F | 54°F | 65.9°F | 3.10 | 7 | 2 | <1 | 12 h 50 min |
| May | 85°F | 63°F | 73.6°F | 4.85 | 9 | 9 | <1 | 13 h 40 min |
| June | 91°F | 70°F | 80.4°F | 3.43 | 7 | 23 | <1 | 14 h 10 min |
| July | 95°F | 72°F | 83.7°F | 1.85 | 5 | 29 | <1 | 14 h |
| August | 96°F | 72°F | 83.9°F | 2.46 | 5 | 29 | <1 | 13 h 20 min |
| September | 90°F | 66°F | 77.9°F | 3.74 | 7 | 20 | <1 | 12 h 20 min |
| October | 81°F | 56°F | 68.3°F | 4.00 | 7 | 6 | <1 | 11 h 30 min |
| November | 69°F | 46°F | 57.5°F | 2.64 | 8 | <1 | 3 | 10 h 40 min |
| December | 61°F | 38°F | 49.8°F | 2.80 | 8 | <1 | 9 | 10 h 10 min |
| Year (annual) | 78°F | 55°F | 66.6°F | 36.97 | 87 | 118 | 33 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 16°C | 2°C | 8.8°C | 65 mm |
| February | 18°C | 4°C | 10.9°C | 58 mm |
| March | 21°C | 8°C | 14.6°C | 83 mm |
| April | 25°C | 12°C | 18.8°C | 79 mm |
| May | 29°C | 17°C | 23.1°C | 123 mm |
| June | 33°C | 21°C | 26.9°C | 87 mm |
| July | 35°C | 22°C | 28.7°C | 47 mm |
| August | 36°C | 22°C | 28.8°C | 62 mm |
| September | 32°C | 19°C | 25.5°C | 95 mm |
| October | 27°C | 13°C | 20.2°C | 102 mm |
| November | 21°C | 8°C | 14.2°C | 67 mm |
| December | 16°C | 3°C | 9.9°C | 71 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00418646; 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.
Which months are mildest at Stillhouse Hollow Dam?
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 (7).
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 USC00418646.
When is the last frost at Stillhouse Hollow Dam?
In Stillhouse Hollow Dam, the last spring frost (32°F) comes after March 14 in half of years and after April 4 in one year in ten; the first autumn frost comes before November 20 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 141 year in 10 after April 4; 9 in 10 after February 22
- First autumn frost, half of years before
- November 201 year in 10 before October 29; 9 in 10 before December 9
NOAA puts the median frost-free season at 251 days, and the season without a hard freeze (28°F) at 277 days.
A hard freeze (28°F) comes after March 1 in half of springs and before December 1 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Stillhouse Hollow Dam in zone 8b in ZIP code 76513, 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 USC00418646; 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 at Stillhouse Hollow Dam?
In a normal year in Stillhouse Hollow Dam, 118 days a year reach 90°F (20 of them 100°F or more), 33 nights fall to 32°F or colder and 87 days bring measurable precipitation.
- Days at 90°F or more
- 118a normal year
- Days at 100°F or more
- 20a normal year
- Nights at 32°F or colder
- 33a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 87a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00418646.
How sunny is it at Stillhouse Hollow Dam?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds at Stillhouse Hollow Dam, 4.8 kWh per square metre a day. July is the sunniest month (88%) and February the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 3.0 |
| February | 70% | 3.5 |
| March | 73% | 4.5 |
| April | 76% | 5.5 |
| May | 76% | 5.9 |
| June | 85% | 6.8 |
| July | 88% | 6.8 |
| August | 88% | 6.3 |
| September | 83% | 5.2 |
| October | 81% | 4.2 |
| November | 77% | 3.2 |
| December | 74% | 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 many heating and cooling degree days does Stillhouse Hollow Dam record?
A normal year at Stillhouse Hollow Dam brings 2,032 heating degree days, 62% fewer than the median U.S. place (5,373), and 2,630 cooling degree days, 2.9 times the median (908). Three months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 6,498 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 534 | 3 |
| February | 379 | 8 |
| March | 237 | 31 |
| April | 74 | 101 |
| May | 10 | 275 |
| June | 0 | 461 |
| July | 0 | 578 |
| August | 0 | 586 |
| September | 3 | 390 |
| October | 62 | 163 |
| November | 254 | 29 |
| December | 478 | 6 |
| Year (annual) | 2,032 | 2,630 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00418646. 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.
How does Stillhouse Hollow Dam's climate compare?
Stillhouse Hollow Dam is warmer than 191 of the 321 places with their own NOAA record in Texas, and wetter than 203. Across the 7,247 U.S. stations with normals, its annual mean of 66.6°F is warmer than 91%.
In the Köppen classification computed from these normals, Stillhouse Hollow Dam 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 Stillhouse Hollow Dam share this climate record?
7 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.
- Temple, TXalso near: Killeen (18 mi, 66.6°F a year); McGregor (23 mi, 65.4°F a year)96,267 people · 10 mi NE
- Belton, TX25,635 people · 3 mi E
- Morgan's Point Resort, TX4,771 people · 9 mi NE
- Troy, TX3,427 people · 17 mi NE
- Salado, TX2,483 people · 6 mi S
- Little River-Academy, TX2,025 people · 11 mi E
- Pendleton, TX689 people · 16 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 Stillhouse Hollow Dam's climate
What is the coldest month at Stillhouse Hollow Dam?
January, with a normal high of 60°F and a normal low of 36°F. The warmest is August (96°F by day, 72°F at night).
Does it snow at Stillhouse Hollow Dam?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month at Stillhouse Hollow Dam?
May, with 4.85 in of precipitation in a normal year; the driest is July with 1.85 in.
What plant hardiness zone is Stillhouse Hollow Dam in?
The USDA's 2023 map puts Stillhouse Hollow Dam in zone 8b in ZIP code 76513, the nearest ZIP area.
How late can frost come at Stillhouse Hollow Dam?
In half of years the last 32°F night comes after March 14; 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
- Killeen, TX10 miles from this station, 66.6°F a year
- Granger, TX25 miles from this station, 67.5°F a year
- Georgetown, TX27 miles from this station, 67.1°F a year
- Gatesville, TX28 miles from this station, 66.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made