Harrisburg climate

Harrisburg Weather in August

NOAA 1991-2020 normals for Eugene Mahlon Sweet AP, 16.7 km from Harrisburg

Average highs run from 86°F on August 1 to 82°F on August 31, and lows from 52°F to 50°F. Normal precipitation for the month is 0.39 in over about 3 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 Harrisburg, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
84°F
Average low
52°F
Precipitation
0.39 in
Record high
108°FAug 9, 1981
Record low
38°FAug 22, 1955
Chance of a freeze
0%
Days of 90°F or more
7.0
Daylight
14 h 37 min to 13 h 15 min
Cloud cover
32%
Humidity
76%
Dew point
55°F
Wind
5.1 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 186°F52°F100°F 201543°F 19577%0%
Aug 286°F52°F102°F 201742°F 20027%0%
Aug 386°F52°F102°F 201742°F 20027%0%
Aug 486°F52°F101°F 201245°F 20067%0%
Aug 586°F52°F98°F 194542°F 19467%0%
Aug 686°F52°F101°F 197242°F 20027%0%
Aug 786°F52°F106°F 197241°F 20028%0%
Aug 886°F52°F104°F 197842°F 20028%0%
Aug 985°F52°F108°F 198143°F 19388%0%
Aug 1085°F52°F106°F 198143°F 20078%0%
Aug 1185°F52°F104°F 199241°F 20078%0%
Aug 1285°F52°F104°F 202141°F 20078%0%
Aug 1385°F52°F104°F 200241°F 19499%0%
Aug 1485°F52°F103°F 202339°F 19559%0%
Aug 1585°F52°F105°F 202339°F 20009%0%
Aug 1684°F52°F105°F 202342°F 20029%0%
Aug 1784°F52°F97°F 194041°F 20009%0%
Aug 1884°F51°F98°F 195039°F 199610%0%
Aug 1984°F51°F104°F 201642°F 194410%0%
Aug 2084°F51°F100°F 201641°F 200010%0%
Aug 2184°F51°F98°F 195039°F 198511%0%
Aug 2284°F51°F99°F 202538°F 195511%0%
Aug 2383°F51°F99°F 202543°F 193811%0%
Aug 2483°F51°F96°F 195841°F 200912%0%
Aug 2583°F51°F97°F 201041°F 195112%0%
Aug 2683°F51°F98°F 201640°F 194612%0%
Aug 2783°F51°F101°F 201940°F 193813%0%
Aug 2883°F51°F99°F 201941°F 196013%0%
Aug 2982°F51°F100°F 194438°F 196913%0%
Aug 3082°F50°F98°F 202242°F 193914%0%
Aug 3182°F50°F102°F 198738°F 200814%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Harrisburg, in percent, and of at least 0.1 inch of snowfall.0510151102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

August 1
sunrise 6:00 AM, sunset 8:37 PM
August 31
sunrise 6:35 AM, sunset 7:50 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024221 (Eugene Mahlon Sweet AP), public domain. Records: NOAA GHCN-Daily, station USW00024221, 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.