select pnm,lnm,st_cd,st_nm,cnty_id,dm,dm_date,dm_hist,avg_tmax_data,avg_tmin_data,avg_prcp_data,rec_hi_data,rec_lo_data,avg_sndp_data,x,y,ff,lf,fd,hz,er,hz_source,kg,hzd,clim_stn_nm,hz12,hz90, feels_like_min,feels_like_max,days_of_prcp,snow,cloud_cover,humidity,wind_speed from worldtg8_pm.pm_climate_points_namer where surl = 'thief-river-falls' and st_surl='minnesota' and iso_cc = 'US' and prim_loc in (1,2) Thief River Falls Minnesota Climate Data - Updated February 2026

Thief River Falls Minnesota Climate Data

Monthly Average Climate Data for Thief River Falls Minnesota

Switch Data to Celsius/Metric Units

Month	Avg. Low	Avg. High	Avg. Precip
January	-4.0 °F	14.1 °F	0.67 in.
February	-1.0 °F	18.9 °F	0.6 in.
March	13.2 °F	32.7 °F	0.79 in.
April	28.9 °F	50.0 °F	1.28 in.
May	41.9 °F	64.6 °F	3.09 in.
June	53.5 °F	73.9 °F	3.95 in.
July	56.4 °F	78.2 °F	3.65 in.
August	53.9 °F	77.6 °F	2.99 in.
September	44.9 °F	68.2 °F	2.83 in.
October	33.0 °F	52.4 °F	2.08 in.
November	18.5 °F	34.6 °F	0.91 in.
December	4.6 °F	20.4 °F	0.79 in.
Annual	28.7 °F	48.8 °F	23.63 in.

Climate Data for Thief River Falls Minnesota

Average First Frost Date	Sep. 21 - Sep. 30
Average Last Frost Date	May 1 - May 10
Average Days With Frost	125-150 Days
Plant Hardiness Zone	Zone 4a : -30°F to -25°F
Plant Hardiness Zone - 2012	Zone 3b : -35°F to -30°F
Current Drought Conditions	Normal
Köppen Climate Classification	Dfb - Humid Continental Mild Summer, Wet All Year

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