Buchanan County climate

Buchanan County Weather in May

NOAA 1991-2020 normals for St Joseph Rosecrans AP, 16.1 km from Buchanan County

Average highs run from 71°F on May 1 to 81°F on May 31, and lows from 47°F to 60°F. Normal precipitation for the month is 4.87 in over about 12 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 Buchanan County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
76°F
Average low
54°F
Precipitation
4.87 in
Record high
102°FMay 26, 2018
Record low
29°FMay 3, 2005
Chance of a freeze
16%
Days of 90°F or more
2.1
Daylight
13 h 53 min to 14 h 46 min
Cloud cover
62%
Humidity
74%
Dew point
55°F
Wind
10.5 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
May 171°F47°F89°F 196531°F 196339%0%
May 271°F48°F92°F 196832°F 196639%0%
May 371°F48°F90°F 195229°F 200539%0%
May 472°F49°F91°F 195032°F 195439%0%
May 572°F49°F92°F 196633°F 202140%0%
May 672°F49°F93°F 202337°F 201140%0%
May 773°F50°F95°F 196636°F 197640%0%
May 873°F50°F91°F 196335°F 198040%0%
May 973°F51°F93°F 201133°F 198040%0%
May 1074°F51°F93°F 201137°F 196640%0%
May 1174°F52°F95°F 200034°F 198140%0%
May 1274°F52°F94°F 202232°F 201339%0%
May 1375°F53°F92°F 201834°F 199739%0%
May 1475°F53°F96°F 201338°F 198039%0%
May 1576°F53°F94°F 202635°F 196739%0%
May 1676°F54°F93°F 201933°F 201439%0%
May 1776°F54°F92°F 197135°F 201439%0%
May 1877°F55°F94°F 197537°F 201439%0%
May 1977°F55°F97°F 199839°F 196839%0%
May 2077°F56°F92°F 197538°F 200239%0%
May 2178°F56°F93°F 197032°F 196839%0%
May 2278°F56°F93°F 197036°F 202239%0%
May 2378°F57°F92°F 196737°F 196339%0%
May 2479°F57°F97°F 196739°F 197939%0%
May 2579°F58°F98°F 196741°F 197939%0%
May 2679°F58°F102°F 201843°F 202239%0%
May 2780°F58°F99°F 201842°F 196840%0%
May 2880°F59°F97°F 201838°F 197140%0%
May 2980°F59°F96°F 201843°F 196540%0%
May 3081°F59°F96°F 200046°F 196540%0%
May 3181°F60°F95°F 201844°F 197240%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Buchanan County, 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 6:20 AM, sunset 8:13 PM
May 31
sunrise 5:54 AM, sunset 8:40 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00013993 (St Joseph Rosecrans AP), public domain. Records: NOAA GHCN-Daily, station USW00013993, 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.