Sam Rayburn climate

Sam Rayburn Weather in August

NOAA 1991-2020 normals for Sam Rayburn Dam, 6.2 km from Sam Rayburn

Average highs run from 95°F on August 1 to 93°F on August 31, and lows from 75°F to 74°F. Normal precipitation for the month is 4.98 in over about 9 wet days.

August day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Sam Rayburn, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
95°F
Average low
74°F
Precipitation
4.98 in
Record high
106°FAug 3, 1998
Record low
56°FAug 29, 1992
Chance of a freeze
0%
Days of 90°F or more
25.3
Daylight
13 h 38 min to 12 h 49 min
Cloud cover
49%
Humidity
72%
Dew point
72°F
Wind
3.4 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Aug 195°F75°F105°F 199864°F 198427%0%
Aug 295°F75°F105°F 199865°F 198427%0%
Aug 395°F75°F106°F 199865°F 201827%0%
Aug 495°F75°F102°F 199862°F 197627%0%
Aug 595°F75°F103°F 202363°F 197427%0%
Aug 695°F74°F102°F 202367°F 197427%0%
Aug 795°F74°F102°F 202365°F 200428%0%
Aug 895°F74°F103°F 202365°F 199028%0%
Aug 995°F74°F102°F 202359°F 199028%0%
Aug 1095°F74°F103°F 201161°F 197628%0%
Aug 1195°F74°F104°F 202362°F 198928%0%
Aug 1295°F74°F104°F 202364°F 198929%0%
Aug 1395°F74°F104°F 202361°F 200429%0%
Aug 1495°F74°F104°F 202358°F 200429%0%
Aug 1595°F74°F104°F 202359°F 200429%0%
Aug 1695°F74°F104°F 202362°F 199229%0%
Aug 1795°F74°F104°F 202362°F 200429%0%
Aug 1895°F74°F104°F 201160°F 199230%0%
Aug 1995°F74°F105°F 201164°F 200430%0%
Aug 2095°F74°F104°F 201163°F 197630%0%
Aug 2194°F74°F106°F 202362°F 197630%0%
Aug 2294°F74°F106°F 202363°F 199230%0%
Aug 2394°F74°F105°F 198062°F 197330%0%
Aug 2494°F74°F103°F 201167°F 197630%0%
Aug 2594°F74°F106°F 202363°F 199730%0%
Aug 2694°F74°F104°F 202362°F 199730%0%
Aug 2794°F74°F104°F 202364°F 197030%0%
Aug 2893°F74°F106°F 202362°F 199231%0%
Aug 2993°F74°F102°F 201156°F 199231%0%
Aug 3093°F74°F101°F 200057°F 198630%0%
Aug 3193°F74°F105°F 200060°F 199230%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Sam Rayburn, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 6:33 AM, sunset 8:11 PM
August 31
sunrise 6:52 AM, sunset 7:41 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00417936 (Sam Rayburn Dam), public domain. Records: NOAA GHCN-Daily, station USC00419101, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.