Capitol Heights climate

Capitol Heights Weather in August

NOAA 1991-2020 normals for Natl Arboretum Dc, 5.6 km from Capitol Heights

Average highs run from 89°F on August 1 to 87°F on August 31, and lows from 71°F to 67°F. Normal precipitation for the month is 3.67 in over about 10 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 Capitol Heights, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
88°F
Average low
69°F
Precipitation
3.67 in
Record high
102°FAug 16, 1988
Record low
39°FAug 29, 1982
Chance of a freeze
0%
Days of 90°F or more
13.2
Daylight
14 h 10 min to 13 h 03 min
Cloud cover
55%
Humidity
69%
Dew point
64°F
Wind
6.7 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 189°F71°F100°F 199953°F 198134%0%
Aug 289°F70°F100°F 199951°F 199034%0%
Aug 389°F70°F99°F 200650°F 195934%0%
Aug 489°F70°F99°F 200650°F 196634%0%
Aug 589°F70°F98°F 198754°F 198534%0%
Aug 689°F70°F98°F 200248°F 195734%0%
Aug 789°F70°F95°F 197751°F 196433%0%
Aug 889°F70°F95°F 196849°F 198933%0%
Aug 989°F70°F100°F 200747°F 198933%0%
Aug 1089°F70°F95°F 198053°F 196433%0%
Aug 1189°F70°F98°F 201047°F 197233%0%
Aug 1289°F69°F97°F 199949°F 197433%0%
Aug 1389°F69°F97°F 200250°F 197133%0%
Aug 1489°F69°F98°F 200249°F 195733%0%
Aug 1589°F69°F98°F 198541°F 196433%0%
Aug 1689°F69°F102°F 198849°F 197233%0%
Aug 1789°F69°F100°F 199747°F 197933%0%
Aug 1889°F69°F102°F 198840°F 198133%0%
Aug 1988°F69°F97°F 200249°F 196132%0%
Aug 2088°F69°F96°F 200245°F 196432%0%
Aug 2188°F68°F102°F 198343°F 198132%0%
Aug 2288°F68°F95°F 195950°F 197632%0%
Aug 2388°F68°F98°F 198349°F 195732%0%
Aug 2488°F68°F95°F 196847°F 195732%0%
Aug 2588°F68°F95°F 196847°F 197131%0%
Aug 2688°F68°F96°F 200746°F 196331%0%
Aug 2787°F67°F95°F 197548°F 196831%0%
Aug 2887°F67°F97°F 198746°F 196831%0%
Aug 2987°F67°F95°F 197339°F 198231%0%
Aug 3087°F67°F97°F 197340°F 198631%0%
Aug 3187°F67°F96°F 199140°F 198631%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Capitol Heights, 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 (EDT).

August 1
sunrise 6:09 AM, sunset 8:19 PM
August 31
sunrise 6:36 AM, sunset 7:39 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00186350 (Natl Arboretum Dc), public domain. Records: NOAA GHCN-Daily, station USC00189070, 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.