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Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT WED SEP 3 2025

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

1-5   In 1995...record breaking heat occurred on the first 5 days
        of the month when the temperature climbed into the 90`s
        on each day.  Record high temperatures of 97 degrees on
        both the 1st and 4th equaled the all-time record maximum
        for the month.  High temperature of 95 degrees on the 3rd
        was a record for the date.  High temperatures of 94 degrees
        on both the 2nd and the 5th were not records.  The low
        temperature of 64 degrees on the 4th equaled the record
        high minimum for the date.
1-7   In 1978...the temperature reached 90 degrees or more on seven
        consecutive days with the highest temperature...94 degrees...
        recorded on both the 4th and 6th.
1-30  In 2020...a worsening drought that started in the spring and
        continued through September. Outside of an early season
        snow on the 8th...the month of September was another
        unseasonably warm and dry period. The combination
        of hot...mostly dry conditions...and critically dry fuels...
        resulted in a continuation and rapid expansion of several
        massive wildfires. The Cameron Peak fire...which became the
        largest in the state`s history started on August 13th...and
        continued through September. As a result...very poor air
        quality continued to impact Denver and the entire Front
        Range.  Denver recorded the most days ever with a high
        temperature of 90 degrees or better; 75 days.  The last
        of which was 91 degrees on the 24th.  The previous
        record was 73 days set in 2012.
2-3   In 1892...there was a trace of rainfall each day.  This...
        together with a trace of rain on both the 7th and 8th...was
        the only rainfall of the month...making the month the driest
        on record.  The monthly record was equaled in 1944.
3     In 1901...a thunderstorm produced rain...hail of unknown size...
        and south winds sustained to 40 mph with gusts to 43 mph.
      In 1961...the Labor Day weekend snow storm is the earliest
        date of the first snow...trace and measurable...of the season.
        The heavy wet snow broke many limbs from trees that were
        still in full foliage.  The storm produced 4.2 inches of
        snowfall at Stapleton Airport with nearly a foot of snow
        in western suburbs and in the foothills.  Minimum
        temperature of 33 degrees was a record for the date and the
        coldest ever recorded so early in the season.
      In 1999...severe thunderstorms dumped large hail across metro
        Denver.  Hail as large as 1 inch in diameter was measured
        near Cherry Creek in Aurora and near Bennett.  Hail to 3/4
        inch in diameter fell in the City of Denver.
      In 2002...a thunderstorm produced a wind gust to 51 mph at
        Denver International Airport.
      In 2003...very heavy thunderstorm rain washed out parts of
        the Virginia Canyon Road above Idaho Springs.  Up to
        4 feet of mud reportedly washed down the road during the
        storm.  Several vehicles were trapped on the road.  In
        Idaho Springs...several streets...including the main street...
        were also buried in mud and gravel.  Some buildings in
        town experienced minor flooding...including the basement
        of the town library and the police station.
      In 2021...severe thunderstorms produced hail up 1 inch in
        diameter and wind gusts up to 65 mph across parts of
        Arapahoe...Douglas and Jefferson counties. At Denver
        International Aiport...a peak wind gust to 34 mph was
        measured from the northwest...along with 0.05 inch of
        rainfall.
3-6   In 1909...rainfall for the 4 days accumulated to 3.97 inches
        in Boulder...while in Denver rainfall totaled 2.45 inches
        on the 4th...5th...and 6th.

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