Johnson City, Texas climate: Normal weather by month, frost dates and records
Johnson City's normal year runs from 35°F January nights to 97°F August afternoons, with 33.0 inches of precipitation and less than an inch of snow (0.2 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 19.4°C, January lows of 2°C, August highs of 36°C, 839 mm of precipitation a year.
- NOAA stationJohnson City (2 mi N)
- Station IDUSC00414605
- Location30.30°N 98.41°W
- Elevation1,137 ft (347 m)
- Population2,092
On October 23, the normal high in Johnson City is 80°F and the normal low 52°F, and the chance of measurable rain or snow is 24%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Johnson City.
- Jan 62° 35°
- Feb 66° 39°
- Mar 73° 47°
- Apr 80° 53°
- May 86° 63°
- Jun 92° 69°
- Jul 96° 71°
- Aug 97° 71°
- Sep 90° 64°
- Oct 82° 54°
- Nov 71° 45°
- Dec 64° 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 in Johnson City each month?
August is the warmest month, with normal highs of 97°F; January the coldest, with normal lows of 35°F. The most precipitation falls in May (4.03 in), the least in December (1.85 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 62°F | 35°F | 48.7°F | 2.25 | 7 | <1 | 14 | 10 h 20 min |
| February | 66°F | 39°F | 52.2°F | 2.01 | 8 | <1 | 8 | 11 h 10 min |
| March | 73°F | 47°F | 59.8°F | 2.56 | 8 | 1 | 3 | 12 h |
| April | 80°F | 53°F | 66.5°F | 2.77 | 6 | 2 | <1 | 12 h 50 min |
| May | 86°F | 63°F | 74.5°F | 4.03 | 8 | 9 | <1 | 13 h 40 min |
| June | 92°F | 69°F | 80.8°F | 3.23 | 7 | 23 | <1 | 14 h 10 min |
| July | 96°F | 71°F | 83.4°F | 2.15 | 5 | 27 | <1 | 14 h |
| August | 97°F | 71°F | 83.7°F | 2.21 | 5 | 28 | <1 | 13 h 20 min |
| September | 90°F | 64°F | 77.3°F | 3.36 | 7 | 17 | <1 | 12 h 20 min |
| October | 82°F | 54°F | 68.1°F | 3.62 | 7 | 4 | 1 | 11 h 30 min |
| November | 71°F | 45°F | 58.1°F | 2.98 | 6 | <1 | 5 | 10 h 40 min |
| December | 64°F | 37°F | 50.5°F | 1.85 | 6 | <1 | 12 | 10 h 10 min |
| Year (annual) | 80°F | 54°F | 67.0°F | 33.02 | 80 | 111 | 42 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 17°C | 2°C | 9.3°C | 57 mm |
| February | 19°C | 4°C | 11.2°C | 51 mm |
| March | 23°C | 8°C | 15.4°C | 65 mm |
| April | 27°C | 12°C | 19.2°C | 70 mm |
| May | 30°C | 17°C | 23.6°C | 102 mm |
| June | 34°C | 21°C | 27.1°C | 82 mm |
| July | 35°C | 22°C | 28.6°C | 55 mm |
| August | 36°C | 22°C | 28.7°C | 56 mm |
| September | 32°C | 18°C | 25.2°C | 85 mm |
| October | 28°C | 12°C | 20.1°C | 92 mm |
| November | 22°C | 7°C | 14.5°C | 76 mm |
| December | 18°C | 3°C | 10.3°C | 47 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00414605; 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 Johnson City?
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 (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 USC00414605.
When is the last frost in Johnson City?
In Johnson City, the last spring frost (32°F) comes after March 22 in half of years and after April 11 in one year in ten; the first autumn frost comes before November 9 in half of years and before October 25 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 221 year in 10 after April 11; 9 in 10 after February 27
- First autumn frost, half of years before
- November 91 year in 10 before October 25; 9 in 10 before November 30
NOAA puts the median frost-free season at 235 days, and the season without a hard freeze (28°F) at 260 days.
A hard freeze (28°F) comes after March 6 in half of springs and before November 22 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Johnson City in zone 8b in ZIP code 78636, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Johnson City's NOAA station is in zone 8b: the coldest night of a typical year reaches 16°F (19 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 USC00414605; 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 Johnson City?
In a normal year in Johnson City, 111 days a year reach 90°F (17 of them 100°F or more), 42 nights fall to 32°F or colder and 80 days bring measurable precipitation.
- Days at 90°F or more
- 111a normal year
- Days at 100°F or more
- 17a normal year
- Nights at 32°F or colder
- 42a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 80a normal year
The highest temperature in this station's record (since 1964) is 110°F, on June 28, 1980; the lowest is 1°F, on December 23, 1989.
The wettest calendar year on that record is 1997, with 54.09 in; the snowiest season is 1984–85, with 10.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00414605; records: ACIS (NOAA Regional Climate Centers), station USC00414605. Records use complete months only; a month missing more than three days is left out.
How sunny is Johnson City?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Johnson City, 4.9 kWh per square metre a day. August is the sunniest month (88%) and February the cloudiest (72%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 3.2 |
| February | 72% | 3.8 |
| March | 73% | 4.7 |
| April | 76% | 5.6 |
| May | 76% | 6.0 |
| June | 85% | 6.8 |
| July | 86% | 6.8 |
| August | 88% | 6.4 |
| September | 81% | 5.2 |
| October | 81% | 4.4 |
| November | 77% | 3.3 |
| December | 74% | 2.9 |
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 Johnson City need?
A normal year in Johnson City brings 1,940 heating degree days, 64% fewer than the median U.S. place (5,373), and 2,689 cooling degree days, 3.0 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 6,614 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 509 | 4 |
| February | 367 | 10 |
| March | 206 | 45 |
| April | 75 | 120 |
| May | 10 | 306 |
| June | 0 | 474 |
| July | 0 | 572 |
| August | 0 | 580 |
| September | 4 | 372 |
| October | 66 | 162 |
| November | 247 | 38 |
| December | 456 | 7 |
| Year (annual) | 1,940 | 2,689 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00414605. 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 Johnson City been warmer than normal lately?
2023 averaged 69.8°F, 2.8°F above the 1991-2020 normal of 67.0°F.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 69.8°F | +2.8°F | 21.46 |
Source: observed years: ACIS, station USC00414605. A year counts only with all twelve months complete.
How does Johnson City's climate compare?
Johnson City is warmer than 203 of the other 320 places with their own NOAA record in Texas, and wetter than 175. Across the 7,247 U.S. stations with normals, its annual mean of 67.0°F is warmer than 92%.
In the Köppen classification computed from these normals, Johnson City 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 Johnson City share this climate record?
Round Mountain has no NOAA station with 1991-2020 normals of its 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.
- Round Mountain, TX118 people · 7 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 Johnson City's climate
What is the coldest month in Johnson City?
January, with a normal high of 62°F and a normal low of 35°F. The warmest is August (97°F by day, 71°F at night).
Does it snow in Johnson City?
Rarely: NOAA's normal is 0.2 inch a year.
What is the rainiest month in Johnson City?
May, with 4.03 in of precipitation in a normal year; the driest is December with 1.85 in.
What plant hardiness zone is Johnson City in?
The USDA's 2023 map puts Johnson City in zone 8b in ZIP code 78636, the nearest ZIP area. By the same method at Johnson City's NOAA station, the coldest night of a typical year reaches 16°F (19 years, 1991-2020): zone 8b.
How late can frost come in Johnson City?
In half of years the last 32°F night comes after March 22; in one year in ten it comes after April 11. Waiting until April 11 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- Blanco, TX14 miles from this station, 65.5°F a year
- Dripping Springs, TX25 miles from this station, 67.4°F a year
- Austin (33 mi NW), TX29 miles from this station, 67.4°F a year
- Fredericksburg, TX30 miles from this station, 65.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made