Navarro Mills Dam, Texas climate: Climate normals at a NOAA weather station
Navarro Mills Dam's normal year runs from 35°F January nights to 96°F August afternoons, with 40.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 18.8°C, January lows of 2°C, August highs of 35°C, 1,030 mm of precipitation a year.
- NOAA stationNavarro Mills Dam
- Station IDUSC00416210
- Location31.96°N 96.69°W
- Elevation454 ft (138 m)
On October 23, the normal high in Navarro Mills Dam is 77°F and the normal low 52°F, and the chance of measurable rain or snow is 23%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Navarro Mills Dam.
- Jan 57° 35°
- Feb 62° 39°
- Mar 68° 47°
- Apr 76° 53°
- May 83° 63°
- Jun 91° 71°
- Jul 95° 74°
- Aug 96° 73°
- Sep 89° 67°
- Oct 79° 55°
- Nov 68° 45°
- Dec 59° 37°
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 Navarro Mills Dam each month?
August is the warmest month, with normal highs of 96°F; January the coldest, with normal lows of 35°F. The most precipitation falls in October (4.58 in), the least in July (1.88 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 57°F | 35°F | 46.1°F | 2.84 | 7 | <1 | 15 | 10 h 20 min |
| February | 62°F | 39°F | 50.3°F | 3.13 | 7 | <1 | 9 | 11 h |
| March | 68°F | 47°F | 57.4°F | 3.61 | 8 | <1 | 3 | 12 h |
| April | 76°F | 53°F | 64.7°F | 3.36 | 7 | 1 | <1 | 13 h |
| May | 83°F | 63°F | 73.2°F | 4.50 | 8 | 7 | <1 | 13 h 50 min |
| June | 91°F | 71°F | 80.7°F | 4.43 | 7 | 21 | <1 | 14 h 10 min |
| July | 95°F | 74°F | 84.3°F | 1.88 | 5 | 29 | <1 | 14 h |
| August | 96°F | 73°F | 84.5°F | 2.44 | 5 | 28 | <1 | 13 h 20 min |
| September | 89°F | 67°F | 77.9°F | 3.23 | 6 | 18 | <1 | 12 h 20 min |
| October | 79°F | 55°F | 66.9°F | 4.58 | 7 | 5 | <1 | 11 h 30 min |
| November | 68°F | 45°F | 56.1°F | 3.03 | 6 | <1 | 4 | 10 h 30 min |
| December | 59°F | 37°F | 48.1°F | 3.51 | 8 | <1 | 12 | 10 h |
| Year (annual) | 77°F | 55°F | 65.9°F | 40.54 | 81 | 109 | 44 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 14°C | 2°C | 7.8°C | 72 mm |
| February | 17°C | 4°C | 10.2°C | 80 mm |
| March | 20°C | 8°C | 14.1°C | 92 mm |
| April | 24°C | 12°C | 18.2°C | 85 mm |
| May | 28°C | 17°C | 22.9°C | 114 mm |
| June | 33°C | 22°C | 27.1°C | 113 mm |
| July | 35°C | 23°C | 29.1°C | 48 mm |
| August | 35°C | 23°C | 29.2°C | 62 mm |
| September | 32°C | 19°C | 25.5°C | 82 mm |
| October | 26°C | 13°C | 19.4°C | 116 mm |
| November | 20°C | 7°C | 13.4°C | 77 mm |
| December | 15°C | 3°C | 8.9°C | 89 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00416210; 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 Navarro Mills Dam?
Normal highs sit between 65°F and 85°F in March, April, May, October and November. Of those, November has the fewest days with rain (6).
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 USC00416210.
When is the last frost at Navarro Mills Dam?
In Navarro Mills Dam, the last spring frost (32°F) comes after March 13 in half of years and after April 3 in one year in ten; the first autumn frost comes before November 14 in half of years and before October 30 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 131 year in 10 after April 3; 9 in 10 after February 19
- First autumn frost, half of years before
- November 141 year in 10 before October 30; 9 in 10 before December 6
NOAA puts the median frost-free season at 250 days, and the season without a hard freeze (28°F) at 276 days.
A hard freeze (28°F) comes after February 27 in half of springs and before November 29 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Navarro Mills Dam in zone 8b in ZIP code 76639, 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 8b: the coldest night of a typical year reaches 16°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 USC00416210; 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 Navarro Mills Dam?
In a normal year in Navarro Mills Dam, 109 days a year reach 90°F (21 of them 100°F or more), 44 nights fall to 32°F or colder and 81 days bring measurable precipitation.
- Days at 90°F or more
- 109a normal year
- Days at 100°F or more
- 21a normal year
- Nights at 32°F or colder
- 44a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 81a normal year
The highest temperature in this station's record (since 1963) is 112°F, on September 5, 2000; the lowest is −5°F, on December 23, 1989.
The wettest calendar year on that record is 1991, with 54.15 in.
Source: NOAA NCEI 1991-2020 annual normals, station USC00416210; records: ACIS (NOAA Regional Climate Centers), station USC00416210. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Navarro Mills Dam?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds at Navarro Mills Dam, 4.7 kWh per square metre a day. August is the sunniest month (87%) and February the cloudiest (67%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 73% | 2.9 |
| February | 67% | 3.3 |
| March | 71% | 4.4 |
| April | 76% | 5.4 |
| May | 77% | 5.9 |
| June | 84% | 6.6 |
| July | 87% | 6.7 |
| August | 87% | 6.2 |
| September | 83% | 5.2 |
| October | 81% | 4.2 |
| November | 76% | 3.1 |
| December | 72% | 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 Navarro Mills Dam record?
A normal year at Navarro Mills Dam brings 2,291 heating degree days, 57% fewer than the median U.S. place (5,373), and 2,635 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 6,362 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 590 | 3 |
| February | 419 | 7 |
| March | 264 | 28 |
| April | 99 | 90 |
| May | 13 | 267 |
| June | 0 | 473 |
| July | 0 | 600 |
| August | 0 | 604 |
| September | 5 | 393 |
| October | 81 | 140 |
| November | 292 | 25 |
| December | 529 | 5 |
| Year (annual) | 2,291 | 2,635 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00416210. 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 Navarro Mills Dam's climate compare?
Navarro Mills Dam is warmer than 172 of the 321 places with their own NOAA record in Texas, and wetter than 233. Across the 7,247 U.S. stations with normals, its annual mean of 65.9°F is warmer than 90%.
In the Köppen classification computed from these normals, Navarro Mills 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 Navarro Mills Dam share this climate record?
8 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.
- Hubbard, TX1,480 people · 10 mi SW
- Blooming Grove, TX890 people · 9 mi N
- Dawson, TX819 people · 5 mi S
- Coolidge, TX800 people · 15 mi S
- Frost, TX628 people · 11 mi NW
- Mount Calm, TX319 people · 18 mi SW
- Malone, TX250 people · 12 mi W
- Barry, TX246 people · 10 mi N
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 Navarro Mills Dam's climate
What is the coldest month at Navarro Mills Dam?
January, with a normal high of 57°F and a normal low of 35°F. The warmest is August (96°F by day, 73°F at night).
Does it snow at Navarro Mills Dam?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month at Navarro Mills Dam?
October, with 4.58 in of precipitation in a normal year; the driest is July with 1.88 in.
What plant hardiness zone is Navarro Mills Dam in?
The USDA's 2023 map puts Navarro Mills Dam in zone 8b in ZIP code 76639, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 16°F (17 years, 1991-2020): zone 8b.
How late can frost come at Navarro Mills Dam?
In half of years the last 32°F night comes after March 13; in one year in ten it comes after April 3. Waiting until April 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- Corsicana, TX17 miles from this station, 67.0°F a year
- Bardwell, TX21 miles from this station, 65.8°F a year
- Hillsboro, TX25 miles from this station, 66.1°F a year
- Mexia, TX27 miles from this station, 66.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made