Karnes City, TX Climate: Temperature by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Karnes City's primary NOAA station, KARNES CITY 2N.
The climate verdict for Karnes City
Warm-season cooling demand defines Karnes City, Texas, running at more than twice its heating total. The NOAA normal records an annual average of 70°F. August is the warmest month at 85°F and January the coldest at 54°F.
- 70°F
- yearly average temperature, NOAA normal
- 296 days
- growing season, frost-free days
Karnes City: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00414696 · Karnes City, TX 70°F mean
TEMP-HOT · RANK-WARM · PHOTO-FINISH · PRCP-UNK · SWING-MID · COMF-UNK · LOAD-COOL · STN-1 · BOOK-PART
- TEMP-HOT 70°F
- RANK-WARM #6,518
- PHOTO-FINISH ≈ San Antonio Kel…
- PRCP-UNK Rain n/a
- SWING-MID 32°F
- COMF-UNK Comfort n/a
- LOAD-COOL 3,218 CDD
- STN-1 USC00414696
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: San Antonio Kelly, TX ( -0.2 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every TX station list.
- Hot Houston, TX 71°F
- Karnes City (this station) 70°F
- Cold Chalmette, LA 70°F
- Near San Antonio Kel…, TX 70°F
- Near Poteet, TX 70°F
Karnes City sits in Texas, the #4 hottest U.S. state at 66.2°F statewide annual average - see all 50 hottest states ranked by NOAA normals
Climate Living Index · Karnes City
Karnes City: 83/100 · grade B
Karnes City publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Karnes City, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 296 days/year | 100/100 · A |
| Annual temperature balance | 70.2°F · 2.7° from 67.5°F | 92/100 · A |
| Normal heat + freeze calendar | 115 calendar days | 67/100 · C |
Karnes City · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · cooling-led station
Where Karnes City sits across the climate record
Available NOAA 1991–2020 fields for Karnes City are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- Top 5% warmest
- Among 6,861 stations, Karnes City sits in the warmer third of annual means.
- Seasonal temperature swing
- Narrower than 88%
- Warmest-to-coldest month gap for Karnes City is compact versus 6,861 complete station-years.
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 65°F (18°C) | 43°F (6°C) | 54°F (12°C) | N/A | 4.4 | 0.0 |
| February | 68°F (20°C) | 46°F (8°C) | 57°F (14°C) | N/A | 1.5 | 0.3 |
| March | 74°F (23°C) | 52°F (11°C) | 63°F (17°C) | N/A | 0.4 | 0.2 |
| April | 82°F (28°C) | 59°F (15°C) | 70°F (21°C) | N/A | 0.0 | 3.7 |
| May | 88°F (31°C) | 66°F (19°C) | 77°F (25°C) | N/A | 0.0 | 14.0 |
| June | 93°F (34°C) | 72°F (22°C) | 83°F (28°C) | N/A | 0.0 | 21.5 |
| July | 96°F (35°C) | 74°F (23°C) | 85°F (29°C) | N/A | 0.0 | 27.5 |
| August | 97°F (36°C) | 73°F (23°C) | 85°F (30°C) | N/A | 0.0 | 28.3 |
| September | 91°F (33°C) | 69°F (21°C) | 80°F (27°C) | N/A | 0.0 | 18.3 |
| October | 83°F (28°C) | 60°F (16°C) | 72°F (22°C) | N/A | 0.1 | 5.6 |
| November | 74°F (23°C) | 51°F (11°C) | 63°F (17°C) | N/A | 0.6 | 0.5 |
| December | 66°F (19°C) | 44°F (7°C) | 55°F (13°C) | N/A | 3.7 | 0.0 |
The year, day by day
The year in Karnes City runs from a mild 42°F around January 7 to 98°F at the peak near August 8, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from May 27 through September 18, covering 115 dates. The broader mild season, normal highs of 70°F or more, runs February 27 to November 27.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 42°F around January 7.
The widest day
August 8 carries the biggest normal gap between afternoon and dawn, 24°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Karnes City.
Where Karnes City Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 115 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
Karnes City earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall
Frost Dates & Growing Season
First Fall Freeze
December 9
50% probability date
Last Spring Freeze
February 16
50% probability date
Growing Season
296 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,295
Higher = more heating needed
Cooling Degree Days
3,218
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside TX closest to Karnes City on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (70°F here).
- Roosevelt, AZ 70°F · 0.0°F off
- Superior, AZ 70°F · 0.0°F off
- Wittmann, AZ 70°F · 0.0°F off
- Baker, CA 70°F · 0.1°F off
Data-derived climate profile
How Karnes City's climate pattern fits together
cooling led · mid swing
Air-conditioning demand is the clearest thermal signal here. Karnes City accumulates 3,218 cooling degree days, more than twice its 1,295 heating total; the monthly table shows when that imbalance builds rather than treating it as a year-round condition.
A moisture-range label is withheld because Karnes City's annual precipitation total is unavailable. Monthly source values remain visible where NOAA provides them, and no annual amount is reconstructed from incomplete data.
August and January mark the typical warm and cold ends of the calendar in Karnes City's middle-range seasonal profile. The measured spread is 31.5°F. The annual average is 70°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
The frost-free window extends for about 296 days. That is a long calendar measure, but it is not a forecast and does not combine heat, rainfall, soil, or local elevation into a planting recommendation.
These labels group NOAA 1991-2020 normals from Karnes City's primary station, so the summer figures are a thirty-year average rather than a ceiling: individual years have run hotter and will again. For Karnes City that means a descriptive range only — not an official NOAA classification and not a prediction for next summer.
Questions about Karnes City's climate
How many days above 90°F does Karnes City get? ▼
How much energy does heating and cooling require in Karnes City? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Karnes City's primary station: KARNES CITY 2N (USC00414696). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 4838452). Match rule for Karnes City: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Karnes City comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.