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Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT FRI SEP 18 2026

...Today in metro Denver weather history...

10-18 In 2018...the high temperature equalled or exceeded 90 degrees for 9
        consecutive days; marking the first time such an occurrence has
        taken place in the month of September.  It also brought September
        of 2018 into a 4-way tie for most 90 degree + days in the month.
        Previous years included 2017...2005 and 1895. During the streak...4
        record high temperatures were either tied or broken...and one
        record high minumum temperatures was broken.
15-19 In 1906...rain on 5 consecutive days totaled 1.61 inches.
        A thunderstorm occurred on the 17th.  High temperatures
        ranged from 48 degrees on the 16th to 65 degrees on the
        15th.  Low temperatures were in the lower to mid 40`s.
16-19 In 1971...a record breaking early fall snow storm caused
        extensive damage to trees and utility lines.  The heavy wet
        snow occurred with little wind...but caused record breaking
        cold temperatures for so early in the season.  Snowfall
        totaled 15.6 inches at Stapleton International Airport
        with most of the snowfall...12.0 inches...occurring on the
        17th.  This was the heaviest first snow of the season.
        The maximum snow depth on the ground was 13 inches.
        Record low temperatures were set on three consecutive days:
        31 degrees on the 17th...23 degrees on the 18th...and 20
        degrees on the 19th...which was also a new all-time record
        minimum for the month at that time.  Record low maximum
        temperatures were set on 4 consecutive days:  48 degrees
        on the 16th...35 degrees on the 17th...40 degrees on the 18th...
        and 42 degrees on the 19th.
18    In 1901...northeast winds were sustained to 42 mph with gusts
        to 50 mph behind an apparent cold front.
      In 1948...the low temperature cooled to only 69 degrees...the
        all-time record high minimum for the month.
      In 1988...a strong cold front blasted metro Denver with
        high winds.  Gusts reached 82 mph in Longmont and 81
        mph at Jefferson County Airport near Broomfield where
        the winds flipped over and destroyed a small airplane.
        Wind gusts to 60 mph were recorded in Boulder and Wheat
        Ridge.  West wind gusts to 54 mph were clocked at Stapleton
        International Airport.  The strong winds downed trees and
        power lines and damaged homes and cars.  A Longmont man was
        slightly injured...when a tree fell on top of his car.
      In 1990...a slow moving thunderstorm over southwest metro
        Denver spawned an ominous looking funnel cloud near the
        intersection of Sheridan Blvd. and U.S. Highway 285.  The
        funnel cloud nearly touched down a few times before lifting
        back into the main cloud.  No damage was reported.  Pea to
        marble size hail and 3/4 inch of rain fell over central and
        northeast Denver.  Numerous streets and underpasses became
        flooded on Denver`s south side when the heavy runoff
        backed up storm sewers.  Thunderstorm rainfall totaled
        1.02 inches at Stapleton International Airport.
      In 1993...a severe thunderstorm rolled through southeast metro
        Denver.  Dime size hail was reported in many areas.
        Straight-line winds from the thunderstorm...measured by a
        weather spotter at 70 mph...tore the roof off 6 apartments
        of an apartment complex in Aurora.  Heavy rain which
        accompanied the winds caused major damage to the
        apartments as well as the contents.  Many trees...fences...
        and power poles were knocked down by the strong winds.
        Heavy rain flooded roadways in Denver and Aurora.
        Thunderstorm rainfall totaled 1.08 inches and north winds
        gusted to 44 mph at Stapleton International Airport where
        the visibility was briefly reduced to as low as 1/4 mile
        in heavy rain.
      In 1996...a late summer snowstorm struck the northern
        mountains and Front Range eastern foothills.  Golden
        Gate Canyon received 6 inches of new snow with 5 inches
        reported at both Nederland and Blackhawk.  Thunderstorms
        produced heavy rain across metro Denver...which was mixed
        with snow by late evening.  Rainfall totaled 0.83 inch
        at the site of the former Stapleton International Airport
        and 1.22 inches at Denver International Airport where
        northwest winds gusted to 39 mph.
18-19 In 1955...heavy rains caused flash flooding across portions of
        metro Denver.  Rainfall totaled 1.71 inches at Stapleton
        Airport.

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