Grapevine Dam, TX Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Grapevine Dam's primary NOAA station, GRAPEVINE DAM.
The climate verdict for Grapevine Dam
Grapevine Dam, Texas has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 65°F. It scores 97/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 97% of them.
- 65°F
- annual average temperature (NOAA normal)
- 97/100
- comfort score, above 97% of station-mapped location scores
- 38.9"
- yearly precipitation total
- 248 days
- frost-free days per growing season
Grapevine Dam: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00413691 · Grapevine Dam, TX 65°F mean · 38.9" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-TOP · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 65°F
- RANK-UPPER #6,106
- PHOTO-FINISH ≈ Augusta Bush Fld
- PRCP-MID 38.9"
- SWING-MID 40°F
- COMF-TOP 97/100
- LOAD-MIX H/C balanced
- STN-1 USC00413691
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Augusta Bush Fld, GA (+ 0 °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.
- Grapevine Dam (this station) 65°F
- Hot Columbus, MS 65°F
- Near Augusta Bush Fld, GA 65°F
- Near Brady, TX 65°F
- Near Carthage, TX 65°F
Grapevine Dam 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 · Grapevine Dam
Grapevine Dam: 86/100 · grade A
Grapevine Dam publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Grapevine Dam, not an official NOAA rating. Rankings still use Comfort Score 97/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 65.4°F · 2.1° from 67.5°F | 93/100 · A |
| Snowfall burden | 0.1 inches/year | 89/100 · A |
| Frost-free season | 248 days/year | 88/100 · A |
| Precipitation balance | 38.9 in · 3.9 from 35 in | 86/100 · A |
| Normal heat + freeze calendar | 93 calendar days | 78/100 · B |
Grapevine Dam · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Grapevine Dam is a temperate Köppen climate: Cfa
Coldest-month mean 44.9°F and warmest-month mean 84.8°F place this station in temperate, no dry season, hot summer climates (Cfa). Class Cfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, hot summer.
- Köppen code
- Cfa
- Group
- Temperate
- Warmest month
- 84.8°F
- Coldest month
- 44.9°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · balanced station
Where Grapevine Dam sits across the climate record
Three NOAA fields for Grapevine Dam's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 11% warmest
- Among 6,861 stations, Grapevine Dam sits in the warmer third of annual means.
- Annual precipitation
- 56th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- 35th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Grapevine Dam compares across U.S. station-mapped locations
Grapevine Dam's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
97 Top 3% score exceeds 97% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). Below this entry.
- 80–90: 921 station-mapped locations (15%). Below this entry.
- 90–100: 564 station-mapped locations (9%). This entry sits in this band.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Grapevine Dam's measured station temperature trend
MethodologyAcross 42 complete annual observations from 1954 to 2018, GRAPEVINE DAM warmed at a fitted rate of 0.04°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Grapevine Dam primary station fitted change +0.04 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 56°F (13°C) | 34°F (1°C) | 45°F (7°C) | 2.6" | 0.0" | 15.4 | 0.0 |
| February | 60°F (16°C) | 38°F (3°C) | 49°F (10°C) | 2.7" | 0.1" | 8.5 | 0.0 |
| March | 68°F (20°C) | 45°F (7°C) | 57°F (14°C) | 3.6" | 0.0" | 3.3 | 0.2 |
| April | 75°F (24°C) | 54°F (12°C) | 64°F (18°C) | 3.5" | 0.0" | 0.4 | 0.6 |
| May | 83°F (28°C) | 63°F (17°C) | 73°F (23°C) | 4.7" | 0.0" | 0.0 | 5.8 |
| June | 91°F (33°C) | 71°F (22°C) | 81°F (27°C) | 3.8" | 0.0" | 0.0 | 21.6 |
| July | 95°F (35°C) | 74°F (23°C) | 85°F (29°C) | 2.3" | 0.0" | 0.0 | 28.3 |
| August | 96°F (35°C) | 74°F (23°C) | 85°F (29°C) | 2.1" | 0.0" | 0.0 | 27.1 |
| September | 89°F (31°C) | 67°F (19°C) | 78°F (25°C) | 3.5" | 0.0" | 0.0 | 16.1 |
| October | 78°F (26°C) | 55°F (13°C) | 67°F (19°C) | 4.5" | 0.0" | 0.2 | 4.6 |
| November | 66°F (19°C) | 45°F (7°C) | 56°F (13°C) | 2.8" | 0.0" | 3.9 | 0.1 |
| December | 58°F (14°C) | 36°F (2°C) | 47°F (8°C) | 2.9" | 0.0" | 12.6 | 0.0 |
The year, day by day
The year in Grapevine Dam runs from a mild 33°F around January 4 to 97°F at the peak near August 1, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from June 10 through September 10, covering 93 dates. The broader mild season, normal highs of 70°F or more, runs March 24 to November 4.
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 33°F around January 4.
Where the wet dates fall
The likeliest wet date is May 11, when 31% of years recorded at least a hundredth of an inch. The driest is July 25 at 16%. Summed across the calendar, that is about 91 wet dates a year.
The widest day
October 11 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 Grapevine Dam.
Where Grapevine Dam Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 93 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
Grapevine Dam 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 and snowfall
8.1 days with precipitation
Snow: 0.1"
7.8 days with precipitation
9.2 days with precipitation
8.0 days with precipitation
9.9 days with precipitation
8.0 days with precipitation
5.2 days with precipitation
5.5 days with precipitation
6.7 days with precipitation
7.7 days with precipitation
7.2 days with precipitation
7.9 days with precipitation
Grapevine Dam spreads its precipitation across the year
Neither half of the year dominates here: June through August take 21% of the annual total and December through February 21%, with neither reaching the 35% that would mark a distinct wet season. Grapevine Dam has no dry season to plan around, though it does carry a 39.9°F seasonal spread.
The gap between the wettest and driest month still matters: May averages 4.7" and August 2.1". The three wettest months together take 33% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Grapevine Dam, it arrives in quantity
38.9" of precipitation falls across only about 91 wet days here, averaging 0.43 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 91 a year, 25% of all days
- Average depth per wet day
- 0.43 inches
- Most wet days
- May, about 10
- Fewest wet days
- July, about 5
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Snow reaches Grapevine Dam, but rarely amounts to much
The normals record 0.1 inches of snow a year here, most likely in February. That is a real but marginal amount: enough that snow is part of the local record, not enough to define the winter.
A figure in this range usually reflects a handful of events that melt quickly rather than a season of accumulation; about 0 days a year record any measurable snow at all.
NOAA 1991-2020 normals. An average across thirty years can smooth away a single heavy winter, so a small annual figure does not mean a significant snowfall is impossible.
Frost Dates & Growing Season
First Fall Freeze
November 17
50% probability date
Last Spring Freeze
March 14
50% probability date
Growing Season
248 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,437
Higher = more heating needed
Cooling Degree Days
2,626
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside TX closest to Grapevine Dam 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 (65°F here).
- Columbus, MS 65°F · 0.0°F off
- Geneva, AL 65°F · 0.0°F off
- Jackson, MS 65°F · 0.0°F off
- Brewton, AL 66°F · 0.1°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (38.9" here), excluding temperature-peer places.
- Osawatomie, KS 38.9" · 0.0" off
- Baraboo, WI 38.9" · 0.0" off
- Hart, MI 38.9" · 0.0" off
- Ukiah, CA 38.9" · 0.0" off
Data-derived climate profile
How Grapevine Dam's climate pattern fits together
mixed demand · moderate · mid swing
August and January mark the typical warm and cold ends of the calendar in Grapevine Dam's middle-range seasonal profile. The measured spread is 39.9°F. The annual average is 65°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Heating and cooling both register in Grapevine Dam's normal, at 2,437 and 2,626 degree days respectively. Neither total exceeds the other by more than two to one, so the record is better read as a mixed-demand calendar than as heating-led or cooling-led.
The frost-free window extends for about 248 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.
Grapevine Dam's 38.9 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Recorded annual snowfall is negligible. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Grapevine Dam's primary station, where heating and cooling demand are close enough that neither season sets the character on its own. On a balanced station like Grapevine Dam, the bands are descriptive ranges rather than an official NOAA classification or a forecast.
Questions about Grapevine Dam's climate
How much rain does Grapevine Dam get? ▼
How many days above 90°F does Grapevine Dam get? ▼
How much energy does heating and cooling require in Grapevine Dam? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Grapevine Dam's primary station: GRAPEVINE DAM (USC00413691). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Grapevine Dam; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Grapevine Dam 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.