Bismarck climate

Bismarck Weather in May

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

Average highs run from 63°F on May 1 to 74°F on May 31, and lows from 36°F to 49°F. Normal precipitation for the month is 2.50 in over about 10 wet days.

May 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.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
68°F
Average low
42°F
Precipitation
2.50 in
Snowfall
0.4 in
Record high
95°FMay 12, 2025
Record low
22°FMay 3, 2013
Chance of a freeze
90%
Days of 90°F or more
0.5
Daylight
14 h 25 min to 15 h 36 min
Cloud cover
63%
Humidity
60%
Dew point
40°F
Wind
11.9 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
May 163°F36°F76°F 202029°F 201731%4%
May 263°F37°F82°F 202125°F 202632%4%
May 363°F37°F85°F 201522°F 201332%4%
May 464°F37°F82°F 202324°F 201332%4%
May 564°F38°F81°F 201622°F 202132%3%
May 665°F38°F89°F 201627°F 201333%3%
May 765°F39°F84°F 201727°F 202633%3%
May 865°F39°F90°F 201724°F 202633%3%
May 966°F39°F83°F 202523°F 202033%3%
May 1066°F40°F86°F 201227°F 201433%2%
May 1167°F40°F89°F 202527°F 202033%2%
May 1267°F41°F95°F 202523°F 202033%2%
May 1367°F41°F95°F 202525°F 201333%2%
May 1468°F42°F91°F 201333°F 201433%2%
May 1568°F42°F80°F 201830°F 201433%2%
May 1668°F43°F85°F 201924°F 201434%2%
May 1769°F43°F87°F 201236°F 202534%1%
May 1869°F43°F85°F 202431°F 201434%1%
May 1970°F44°F79°F 202132°F 201534%1%
May 2070°F44°F84°F 202126°F 201535%1%
May 2170°F45°F84°F 202130°F 201535%1%
May 2271°F45°F83°F 201236°F 202535%1%
May 2371°F45°F87°F 201435°F 202236%1%
May 2471°F46°F89°F 202338°F 201236%1%
May 2572°F46°F84°F 201835°F 201236%1%
May 2672°F47°F91°F 202639°F 202436%1%
May 2772°F47°F92°F 202640°F 201637%0%
May 2873°F47°F91°F 202635°F 202137%0%
May 2973°F48°F88°F 201430°F 202137%0%
May 3073°F48°F90°F 201434°F 201237%0%
May 3174°F49°F87°F 201931°F 201238%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.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

May 1
sunrise 6:28 AM, sunset 8:53 PM
May 31
sunrise 5:53 AM, sunset 9:29 PM

Every day of May: 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.