Washington State Park, Texas climate: Climate normals at a NOAA weather station
Washington State Park's normal year runs from 38°F January nights to 96°F August afternoons, with 44.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 20.0°C, January lows of 3°C, August highs of 36°C, 1,121 mm of precipitation a year.
- NOAA stationWashington State Park
- Station IDUSC00419491
- Location30.32°N 96.16°W
- Elevation215 ft (66 m)
On October 23, the normal high in Washington State Park is 80°F and the normal low 54°F, and the chance of measurable rain or snow is 22%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Washington State Park.
- Jan 62° 38°
- Feb 65° 42°
- Mar 72° 49°
- Apr 79° 56°
- May 86° 65°
- Jun 91° 71°
- Jul 95° 73°
- Aug 96° 73°
- Sep 91° 67°
- Oct 82° 56°
- Nov 71° 47°
- Dec 64° 40°
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 Washington State Park each month?
August is the warmest month, with normal highs of 96°F; January the coldest, with normal lows of 38°F. The most precipitation falls in May (4.70 in), the least in July (2.23 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 62°F | 38°F | 49.9°F | 3.53 | 9 | <1 | 11 | 10 h 20 min |
| February | 65°F | 42°F | 53.8°F | 3.00 | 9 | <1 | 6 | 11 h 10 min |
| March | 72°F | 49°F | 60.9°F | 3.31 | 8 | <1 | 2 | 12 h |
| April | 79°F | 56°F | 67.3°F | 3.35 | 7 | 2 | <1 | 12 h 50 min |
| May | 86°F | 65°F | 75.1°F | 4.70 | 7 | 10 | <1 | 13 h 40 min |
| June | 91°F | 71°F | 81.1°F | 4.59 | 7 | 23 | <1 | 14 h 10 min |
| July | 95°F | 73°F | 83.8°F | 2.23 | 5 | 28 | <1 | 14 h |
| August | 96°F | 73°F | 84.5°F | 3.31 | 6 | 28 | <1 | 13 h 20 min |
| September | 91°F | 67°F | 78.9°F | 3.82 | 7 | 20 | <1 | 12 h 20 min |
| October | 82°F | 56°F | 69.2°F | 4.69 | 7 | 7 | <1 | 11 h 30 min |
| November | 71°F | 47°F | 59.1°F | 3.98 | 7 | <1 | 3 | 10 h 40 min |
| December | 64°F | 40°F | 52.0°F | 3.64 | 9 | <1 | 10 | 10 h 10 min |
| Year (annual) | 80°F | 56°F | 68.0°F | 44.15 | 87 | 118 | 31 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 16°C | 3°C | 9.9°C | 90 mm |
| February | 19°C | 6°C | 12.1°C | 76 mm |
| March | 22°C | 10°C | 16.1°C | 84 mm |
| April | 26°C | 13°C | 19.6°C | 85 mm |
| May | 30°C | 18°C | 23.9°C | 119 mm |
| June | 33°C | 22°C | 27.3°C | 117 mm |
| July | 35°C | 23°C | 28.8°C | 57 mm |
| August | 36°C | 23°C | 29.2°C | 84 mm |
| September | 33°C | 19°C | 26.1°C | 97 mm |
| October | 28°C | 13°C | 20.7°C | 119 mm |
| November | 22°C | 8°C | 15.1°C | 101 mm |
| December | 18°C | 5°C | 11.1°C | 92 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00419491; 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 Washington State Park?
Normal highs sit between 65°F and 85°F in February, March, April, October and November. Of those, April 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 USC00419491.
When is the last frost at Washington State Park?
In Washington State Park, the last spring frost (32°F) comes after March 7 in half of years and after March 31 in one year in ten; the first autumn frost comes before November 19 in half of years and before November 1 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 71 year in 10 after March 31; 9 in 10 after February 10
- First autumn frost, half of years before
- November 191 year in 10 before November 1; 9 in 10 before December 11
NOAA puts the median frost-free season at 259 days, and the season without a hard freeze (28°F) at 291 days.
A hard freeze (28°F) comes after February 19 in half of springs and before December 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Washington State Park in zone 9a in ZIP code 77880, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 9a: the coldest night of a typical year reaches 21°F (17 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 USC00419491; 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 at Washington State Park?
In a normal year in Washington State Park, 118 days a year reach 90°F (23 of them 100°F or more), 31 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
- 23a normal year
- Nights at 32°F or colder
- 31a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 87a normal year
The highest temperature in this station's record (since 1938) is 118°F, on August 27, 2009; the lowest is 3°F, on December 23, 1989.
The wettest calendar year on that record is 1994, with 57.42 in; the snowiest season is 1972–73, with 4.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00419491; records: ACIS (NOAA Regional Climate Centers), station USC00419491. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Washington State Park?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds at Washington State Park, 4.7 kWh per square metre a day. August is the sunniest month (87%) and February the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 72% | 2.9 |
| February | 66% | 3.4 |
| March | 71% | 4.5 |
| April | 75% | 5.4 |
| May | 77% | 5.9 |
| June | 84% | 6.6 |
| July | 86% | 6.6 |
| August | 87% | 6.2 |
| September | 82% | 5.2 |
| October | 81% | 4.3 |
| November | 76% | 3.2 |
| December | 71% | 2.6 |
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 Washington State Park record?
A normal year at Washington State Park brings 1,750 heating degree days, 67% fewer than the median U.S. place (5,373), and 2,864 cooling degree days, 3.2 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 6,917 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 477 | 9 |
| February | 327 | 15 |
| March | 181 | 54 |
| April | 62 | 130 |
| May | 6 | 319 |
| June | 0 | 485 |
| July | 0 | 584 |
| August | 0 | 606 |
| September | 2 | 419 |
| October | 52 | 182 |
| November | 224 | 47 |
| December | 419 | 14 |
| Year (annual) | 1,750 | 2,864 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00419491. 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 Washington State Park's climate compare?
Washington State Park is warmer than 220 of the 321 places with their own NOAA record in Texas, and wetter than 249. Across the 7,247 U.S. stations with normals, its annual mean of 68.0°F is warmer than 93%.
In the Köppen classification computed from these normals, Washington State Park 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 Washington State Park share this climate record?
6 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.
- Navasota, TX9,471 people · 6 mi NE
- Plantersville, TX519 people · 18 mi E
- Anderson, TX212 people · 15 mi NE
- Todd Mission, TX131 people · 20 mi E
- Pinebrook, TX89 people · 17 mi E
- Clay, TX22 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 Washington State Park's climate
What is the coldest month at Washington State Park?
January, with a normal high of 62°F and a normal low of 38°F. The warmest is August (96°F by day, 73°F at night).
Does it snow at Washington State Park?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month at Washington State Park?
May, with 4.70 in of precipitation in a normal year; the driest is July with 2.23 in.
What plant hardiness zone is Washington State Park in?
The USDA's 2023 map puts Washington State Park in zone 9a in ZIP code 77880, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 21°F (17 years, 1991-2020): zone 9a.
How late can frost come at Washington State Park?
In half of years the last 32°F night comes after March 7; in one year in ten it comes after March 31. Waiting until March 31 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- Brenham, TX18 miles from this station, 68.0°F a year
- Bellville, TX21 miles from this station, 68.8°F a year
- College Station, TX22 miles from this station, 69.4°F a year
- Somerville, TX23 miles from this station, 67.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made