Morrow County climate

Morrow County Weather in August

NOAA 1991-2020 normals for Heppner, 6.2 km from Morrow County

Average highs run from 89°F on August 1 to 82°F on August 31, and lows from 57°F to 52°F. Normal precipitation for the month is 0.28 in over about 2 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 Morrow County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
86°F
Average low
55°F
Precipitation
0.28 in
Record high
110°FAug 10, 1898
Record low
35°FAug 24, 1910
Chance of a freeze
0%
Days of 90°F or more
10.5
Daylight
14 h 43 min to 13 h 18 min
Cloud cover
29%
Humidity
46%
Dew point
46°F
Wind
8.5 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°F57°F101°F 200942°F 19638%0%
Aug 289°F57°F105°F 200942°F 19648%0%
Aug 389°F57°F99°F 197843°F 19558%0%
Aug 489°F57°F103°F 196141°F 19508%0%
Aug 589°F57°F108°F 199838°F 19098%0%
Aug 689°F56°F104°F 197240°F 19098%0%
Aug 788°F56°F105°F 197239°F 19468%0%
Aug 888°F56°F104°F 197241°F 19388%0%
Aug 988°F56°F103°F 189841°F 19548%0%
Aug 1088°F56°F110°F 189843°F 19478%0%
Aug 1188°F56°F103°F 199642°F 19078%0%
Aug 1287°F56°F101°F 197142°F 18998%0%
Aug 1387°F55°F102°F 197741°F 19558%0%
Aug 1487°F55°F104°F 199241°F 18998%0%
Aug 1587°F55°F100°F 199240°F 19108%0%
Aug 1686°F55°F102°F 196739°F 19108%0%
Aug 1786°F55°F105°F 189742°F 19118%0%
Aug 1886°F55°F105°F 189739°F 19028%0%
Aug 1986°F54°F105°F 189737°F 19168%0%
Aug 2085°F54°F108°F 189739°F 19488%0%
Aug 2185°F54°F106°F 189739°F 19108%0%
Aug 2285°F54°F102°F 189739°F 19608%0%
Aug 2384°F54°F101°F 189741°F 18998%0%
Aug 2484°F53°F97°F 189835°F 19109%0%
Aug 2584°F53°F100°F 195835°F 19109%0%
Aug 2684°F53°F98°F 195841°F 18959%0%
Aug 2783°F53°F98°F 193438°F 19079%0%
Aug 2883°F53°F99°F 197236°F 19029%0%
Aug 2983°F52°F102°F 191537°F 19809%0%
Aug 3083°F52°F99°F 191935°F 19079%0%
Aug 3182°F52°F97°F 200735°F 19079%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Morrow County, in percent, and of at least 0.1 inch of snowfall.02468101102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

August 1
sunrise 5:43 AM, sunset 8:26 PM
August 31
sunrise 6:19 AM, sunset 7:37 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00353827 (Heppner), public domain. Records: NOAA GHCN-Daily, station USC00353827, 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.