Bismarck climate

Bismarck Weather in August

NOAA 1991-2020 normals for Bismarck, 4.5 km from Bismarck

Average highs run from 86°F on August 1 to 80°F on August 31, and lows from 58°F to 52°F. Normal precipitation for the month is 2.50 in over about 8 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 Bismarck, 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
56°F
Precipitation
2.50 in
Record high
104°FAug 3, 2026
Record low
40°FAug 25, 2015
Chance of a freeze
0%
Days of 90°F or more
7.4
Daylight
14 h 52 min to 13 h 22 min
Cloud cover
50%
Humidity
56%
Dew point
52°F
Wind
10.1 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°F58°F97°F 201251°F 201528%0%
Aug 286°F58°F97°F 202449°F 201328%0%
Aug 386°F58°F104°F 202651°F 202027%0%
Aug 486°F58°F100°F 201851°F 202027%0%
Aug 586°F58°F100°F 202247°F 202627%0%
Aug 686°F58°F94°F 202245°F 201227%0%
Aug 786°F58°F95°F 201250°F 202427%0%
Aug 885°F58°F92°F 201848°F 201727%0%
Aug 985°F58°F101°F 202145°F 202426%0%
Aug 1085°F57°F94°F 201843°F 202426%0%
Aug 1185°F57°F96°F 201845°F 202426%0%
Aug 1285°F57°F99°F 201849°F 202426%0%
Aug 1385°F57°F103°F 201850°F 201326%0%
Aug 1484°F57°F96°F 201546°F 202126%0%
Aug 1584°F56°F99°F 201548°F 201626%0%
Aug 1684°F56°F102°F 201548°F 201826%0%
Aug 1784°F56°F101°F 202148°F 201226%0%
Aug 1883°F56°F103°F 202143°F 201226%0%
Aug 1983°F55°F100°F 202145°F 201926%0%
Aug 2083°F55°F97°F 202049°F 201226%0%
Aug 2183°F55°F101°F 201346°F 201526%0%
Aug 2282°F55°F93°F 201545°F 201625%0%
Aug 2382°F54°F94°F 202044°F 201725%0%
Aug 2482°F54°F94°F 202246°F 201525%0%
Aug 2582°F54°F95°F 201240°F 201525%0%
Aug 2681°F53°F97°F 201341°F 202525%0%
Aug 2781°F53°F88°F 202044°F 201425%0%
Aug 2881°F53°F95°F 201347°F 201225%0%
Aug 2980°F52°F92°F 201345°F 201925%0%
Aug 3080°F52°F103°F 201244°F 201825%0%
Aug 3180°F52°F98°F 201544°F 201925%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Bismarck, 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 (CDT).

August 1
sunrise 6:23 AM, sunset 9:15 PM
August 31
sunrise 7:02 AM, sunset 8:24 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024011 (Bismarck), public domain. Records: NOAA GHCN-Daily, station USC00320818, 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.