Sam Rayburn Dam, TX Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Sam Rayburn Dam's primary NOAA station, SAM RAYBURN DAM.
The climate verdict for Sam Rayburn Dam
Water is the standout signal in Sam Rayburn Dam, Texas: 60.0 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 69°F. It scores 77/100 for climate comfort (good), putting it in the top third of station-mapped location scores and exceeding 70% of them.
- 69°F
- annual average temperature (NOAA normal)
- 77/100
- comfort score, above 70% of station-mapped location scores
- 60.0"
- precipitation, annual total
- 280 days
- growing season, frost-free days
Sam Rayburn Dam: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00417936 · Sam Rayburn Dam, TX 69°F mean · 60.0" precip
TEMP-MILD · RANK-WARM · PHOTO-FINISH · PRCP-WET · SWING-MID · COMF-TOP · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 69°F
- RANK-WARM #6,449
- PHOTO-FINISH ≈ Baton Rouge Ryan
- PRCP-WET 60.0"
- SWING-MID 34°F
- COMF-TOP 77/100
- LOAD-MIX H/C balanced
- STN-1 USC00417936
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Baton Rouge Ryan, LA (+ 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.
- Sam Rayburn Dam (this station) 69°F
- Hot Smithville, TX 69°F
- Near Baton Rouge Ryan, LA 69°F
- Near Biloxi, MS 69°F
- Near Jackson Whiteho…, FL 69°F
Sam Rayburn 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 · Sam Rayburn Dam
Sam Rayburn Dam: 74/100 · grade B
Sam Rayburn 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 Sam Rayburn Dam, not an official NOAA rating. Rankings still use Comfort Score 77/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 280 days/year | 97/100 · A |
| Annual temperature balance | 68.5°F · 1.0° from 67.5°F | 95/100 · A |
| Snowfall burden | 0.0 inches/year | 90/100 · A |
| Normal heat + freeze calendar | 100 calendar days | 76/100 · B |
| Precipitation balance | 60.0 in · 25.0 from 35 in | 12/100 · F |
Sam Rayburn Dam · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Sam Rayburn Dam is a temperate Köppen climate: Cfa
Coldest-month mean 50.7°F and warmest-month mean 84.5°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
- 84.5°F
- Coldest month
- 50.7°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 Sam Rayburn Dam sits across the climate record
Three NOAA fields for Sam Rayburn Dam's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 6% warmest
- Among 6,861 stations, Sam Rayburn Dam sits in the warmer third of annual means.
- Annual precipitation
- Top 5% wettest
- Sam Rayburn Dam's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 85%
- Warmest-to-coldest month gap for Sam Rayburn Dam is compact versus 6,861 complete station-years.
How Sam Rayburn Dam compares across U.S. station-mapped locations
Sam Rayburn Dam's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
77 Top 30% score exceeds 70% 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%). This entry sits in this band.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Sam Rayburn Dam's measured station temperature trend
MethodologyAcross 44 complete annual observations from 1968 to 2020, SAM RAYBURN DAM warmed at a fitted rate of 0.15°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Sam Rayburn Dam primary station fitted change +0.15 °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 | 60°F (16°C) | 41°F (5°C) | 51°F (10°C) | 5.6" | 0.0" | 10.5 | 0.0 |
| February | 64°F (18°C) | 45°F (7°C) | 54°F (12°C) | 4.8" | 0.0" | 5.9 | 0.0 |
| March | 71°F (22°C) | 51°F (11°C) | 61°F (16°C) | 5.4" | 0.0" | 2.0 | 0.1 |
| April | 78°F (26°C) | 58°F (14°C) | 68°F (20°C) | 4.6" | 0.0" | 0.3 | 0.4 |
| May | 85°F (30°C) | 66°F (19°C) | 76°F (24°C) | 4.5" | 0.0" | 0.0 | 6.2 |
| June | 91°F (33°C) | 73°F (23°C) | 82°F (28°C) | 5.5" | 0.0" | 0.0 | 19.1 |
| July | 94°F (34°C) | 75°F (24°C) | 84°F (29°C) | 3.5" | 0.0" | 0.0 | 25.4 |
| August | 95°F (35°C) | 74°F (24°C) | 85°F (29°C) | 5.0" | 0.0" | 0.0 | 25.3 |
| September | 89°F (32°C) | 70°F (21°C) | 80°F (27°C) | 4.4" | 0.0" | 0.0 | 14.8 |
| October | 81°F (27°C) | 59°F (15°C) | 70°F (21°C) | 5.2" | 0.0" | 0.2 | 2.6 |
| November | 70°F (21°C) | 50°F (10°C) | 60°F (15°C) | 5.3" | 0.0" | 2.6 | 0.0 |
| December | 62°F (17°C) | 43°F (6°C) | 53°F (11°C) | 6.1" | 0.0" | 8.2 | 0.0 |
The year, day by day
The year in Sam Rayburn Dam runs from a mild 41°F around January 7 to 95°F at the peak near August 5, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from June 6 through September 13, covering 100 dates. The broader mild season, normal highs of 70°F or more, runs March 12 to November 13.
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 41°F around January 7.
Where the wet dates fall
The likeliest wet date is December 17, when 37% of years recorded at least a hundredth of an inch. The driest is September 30 at 25%. Summed across the calendar, that is about 112 wet dates a year.
The widest day
October 18 carries the biggest normal gap between afternoon and dawn, 22°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Sam Rayburn Dam.
Where Sam Rayburn Dam Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 100 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
This is one of the wettest normals climates ranked: about 60 inches of precipitation in a normal year, a total fewer than one station in ten surpasses.
Sam Rayburn Dam earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall and snowfall
11.3 days with precipitation
9.9 days with precipitation
10.0 days with precipitation
8.0 days with precipitation
9.1 days with precipitation
9.9 days with precipitation
8.8 days with precipitation
9.1 days with precipitation
8.1 days with precipitation
7.9 days with precipitation
9.0 days with precipitation
11.3 days with precipitation
Sam Rayburn Dam spreads its precipitation across the year
Neither half of the year dominates here: June through August take 23% of the annual total and December through February 27%, with neither reaching the 35% that would mark a distinct wet season. Sam Rayburn Dam has no dry season to plan around, though it does carry a 33.8°F seasonal spread.
The gap between the wettest and driest month still matters: December averages 6.1" and July 3.5". The three wettest months together take 29% 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 Sam Rayburn Dam, it arrives in quantity
60.0" of precipitation falls across only about 112 wet days here, averaging 0.53 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 112 a year, 31% of all days
- Average depth per wet day
- 0.53 inches
- Most wet days
- January, about 11
- Fewest wet days
- October, about 8
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.
Sam Rayburn Dam's record shows no measurable snowfall
This station measured snowfall across the 1991-2020 period and recorded none: the annual normal is 0.0 inches. That is a measured zero rather than missing data, which is a meaningful distinction here , most stations in the database simply do not report snow at all, and those pages say nothing about it.
A thirty-year normal of zero describes the typical year at this station. It is not a claim that snow has never fallen in the area.
Frost Dates & Growing Season
First Fall Freeze
December 1
50% probability date
Last Spring Freeze
February 24
50% probability date
Growing Season
280 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,671
Higher = more heating needed
Cooling Degree Days
2,988
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside TX closest to Sam Rayburn 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 (69°F here).
- Biloxi, MS 69°F · 0.0°F off
- Green Valley, AZ 68°F · 0.1°F off
- Marrero, LA 68°F · 0.1°F off
- Pensacola, FL 69°F · 0.1°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (60.0" here), excluding temperature-peer places.
- Cookeville, TN 60.0" · 0.0" off
- Waynesboro, MS 60.0" · 0.0" off
- Rayville, LA 60.0" · 0.0" off
- Gainesville, AL 60.0" · 0.1" off
Data-derived climate profile
How Sam Rayburn Dam's climate pattern fits together
mixed demand · wet · mid swing
Water is prominent even though neither heating nor cooling wholly defines the record. Sam Rayburn Dam averages 60.0 inches of precipitation a year. Recorded annual snowfall is negligible. The monthly table supplies the seasonal distribution hidden by that annual total.
August and January mark the typical warm and cold ends of the calendar in Sam Rayburn Dam's middle-range seasonal profile. The measured spread is 33.8°F. The annual average is 69°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Heating and cooling both register in Sam Rayburn Dam's normal, at 1,671 and 2,988 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 280 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 Sam Rayburn 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 Sam Rayburn Dam, the bands are descriptive ranges rather than an official NOAA classification or a forecast.
Questions about Sam Rayburn Dam's climate
How much rain does Sam Rayburn Dam get? ▼
How many days above 90°F does Sam Rayburn Dam get? ▼
How much energy does heating and cooling require in Sam Rayburn Dam? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Sam Rayburn Dam's primary station: SAM RAYBURN DAM (USC00417936). 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 Sam Rayburn 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 Sam Rayburn 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.