Thief River Falls climate

Thief River Falls Weather in May

NOAA 1991-2020 normals for Thief Rvr Falls 2, 1.5 km from Thief River Falls

Average highs run from 62°F on May 1 to 73°F on May 31, and lows from 36°F to 49°F.

May day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Thief River Falls, in °F, with the record for each date.020406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
68°F
Average low
42°F
Snowfall
0.1 in
Record high
102°FMay 30, 1934
Record low
15°FMay 3, 1967
Chance of a freeze
91%
Daylight
14 h 32 min to 15 h 46 min
Cloud cover
66%
Humidity
65%
Dew point
42°F
Wind
11.6 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 162°F36°F89°F 193418°F 19583%
May 262°F37°F90°F 195916°F 19673%
May 363°F37°F90°F 195215°F 19673%
May 463°F37°F91°F 198523°F 19673%
May 563°F38°F95°F 191819°F 19292%
May 664°F38°F91°F 201621°F 19762%
May 764°F39°F90°F 199219°F 19762%
May 865°F39°F90°F 198719°F 19292%
May 965°F39°F89°F 192820°F 19452%
May 1066°F40°F92°F 198724°F 19452%
May 1166°F40°F89°F 198718°F 19462%
May 1266°F41°F95°F 202517°F 19461%
May 1367°F41°F92°F 193223°F 19531%
May 1467°F41°F92°F 202523°F 20161%
May 1568°F42°F92°F 198727°F 19291%
May 1668°F42°F88°F 191823°F 19291%
May 1768°F43°F89°F 197224°F 19251%
May 1869°F43°F89°F 197725°F 19161%
May 1969°F44°F92°F 192524°F 19241%
May 2070°F44°F88°F 198026°F 19581%
May 2170°F44°F96°F 196423°F 19241%
May 2270°F45°F95°F 196425°F 19241%
May 2371°F45°F94°F 192823°F 19680%
May 2471°F46°F90°F 198026°F 19300%
May 2571°F46°F90°F 195928°F 19240%
May 2672°F47°F92°F 192929°F 19610%
May 2772°F47°F94°F 193427°F 19570%
May 2872°F47°F94°F 193424°F 19470%
May 2973°F48°F95°F 193928°F 19470%
May 3073°F48°F102°F 193428°F 19470%
May 3173°F49°F99°F 193432°F 19640%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Thief River Falls, in percent, and of at least 0.1 inch of snowfall.012341102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

May 1
sunrise 6:06 AM, sunset 8:38 PM
May 31
sunrise 5:30 AM, sunset 9:16 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00218247 (Thief Rvr Falls 2), public domain. Records: NOAA GHCN-Daily, station USC00216787, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.