Gaithersburg climate

Gaithersburg Weather in August

NOAA 1991-2020 normals for Rockville 1 Ne, 6.5 km from Gaithersburg

Average highs run from 87°F on August 1 to 83°F on August 31, and lows from 69°F to 65°F. Normal precipitation for the month is 3.05 in over about 7 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 Gaithersburg, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
85°F
Average low
67°F
Precipitation
3.05 in
Record high
104°FAug 6, 1918
Record low
39°FAug 17, 1979
Chance of a freeze
0%
Days of 90°F or more
6.3
Daylight
14 h 11 min to 13 h 04 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 187°F69°F100°F 191549°F 191429%0%
Aug 286°F68°F100°F 195551°F 197629%0%
Aug 386°F68°F100°F 195547°F 192029%0%
Aug 486°F68°F99°F 198750°F 192028%0%
Aug 586°F68°F96°F 191851°F 195128%0%
Aug 686°F68°F104°F 191849°F 195128%0%
Aug 786°F68°F104°F 191851°F 199428%0%
Aug 886°F68°F102°F 191847°F 197528%0%
Aug 986°F68°F98°F 198750°F 197528%0%
Aug 1086°F68°F94°F 191450°F 191927%0%
Aug 1186°F68°F95°F 194946°F 197227%0%
Aug 1286°F68°F96°F 191848°F 196827%0%
Aug 1385°F68°F98°F 200244°F 197927%0%
Aug 1485°F67°F97°F 200247°F 191627%0%
Aug 1585°F67°F98°F 198846°F 196427%0%
Aug 1685°F67°F100°F 199742°F 197927%0%
Aug 1785°F67°F98°F 198839°F 197927%0%
Aug 1885°F67°F97°F 191443°F 198126%0%
Aug 1985°F67°F99°F 191448°F 191526%0%
Aug 2085°F67°F99°F 191447°F 191826%0%
Aug 2185°F67°F95°F 191446°F 191826%0%
Aug 2284°F66°F96°F 191646°F 197926%0%
Aug 2384°F66°F97°F 196850°F 197826%0%
Aug 2484°F66°F96°F 196846°F 197126%0%
Aug 2584°F66°F95°F 196846°F 197126%0%
Aug 2684°F66°F97°F 195943°F 197726%0%
Aug 2784°F66°F98°F 198748°F 191926%0%
Aug 2883°F66°F96°F 195349°F 198626%0%
Aug 2983°F65°F95°F 195340°F 198227%0%
Aug 3083°F65°F96°F 198240°F 198627%0%
Aug 3183°F65°F99°F 195344°F 198627%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Gaithersburg, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

August 1
sunrise 6:09 AM, sunset 8:20 PM
August 31
sunrise 6:37 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 USC00187705 (Rockville 1 Ne), public domain. Records: NOAA GHCN-Daily, station USC00187705, 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.