Mother Nature obviously hasn’t gotten the message that it is now September and fall is here.  Once again Denver broke a record high temperature – the fourth time we have tied or broken a record this month. 

According to the National Weather Service the temperature at Denver International Airport reached 92 degrees at 3:55pm.  This shatters the old record high for the date of 89 degrees that was set twice, once in 1994 and before than in 1892.

Here in Thornton we were a couple of degrees cooler as we reached a high of 89.7 degrees at 2:41pm.

This is the fourth time this month that we have tied or set a new record high temperature and September 2010 may very well end up as one of the top 10 warmest on record. 

As of midnight the average temperature in Denver during September had been 67.0 degrees.  If the month were to have ended then we would be in a tie with 1939 for the 7th warmest September on record (see list below). 

With temperatures forecast to remain in the mid-80s on Wednesday and around 80 on Thursday it is very possible September 2010 will fit on that top 10 list somewhere.  We are certain to far exceed the average September temperature of 62.4 degrees. 

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DENVER’S 10 WARMEST SEPTEMBERS
(1873-2009)

The Mile High City is on pace to see one of its “top 10 warmest” Septembers on record and that was in full evidence on Sunday.  For the third time this month we have tied or broken a record high temperature. 

• With fall’s arrival, when can Denver expect its first freeze and snow?
• Don’t miss: Do Denver weather and climate records have an asterisk attached?

A sizzling end to summer in the Mile High City!  Following on Sunday’s record setting heat we followed suit again on Monday breaking another high temperature record.

The official high temperature as measured at Denver International Airport reached 94 degrees Monday afternoon at 1:38pm.  This breaks the old high temperature record for the date of 92 degrees set in 1956. 

Here is Thornton we just a slight bit cooler than the official high temperature as ThorntonWeather.com recorded 92.3 degrees as our high temperature. 

The mercury would likely have climbed higher today were it not for some afternoon cloud cover. 

Yesterday Denver reached a high of 96 degrees easily eclipsing the old record for September 19th of 93 set in 1980.  The day also went down in history as the hottest home game temperature in history for the Denver Broncos and the highest temperature ever recorded in Denver this late in the year. 

Tomorrow is the last day of summer but we won’t be breaking any records.  Temperatures will become more seasonal finally as cooler air moves in from the northern plains. 

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Denver is closing out summer in sizzling fashion.  With only three days left in summer the Mile High City shattered the record high temperature for the date and may set another one on Monday.

Today at 2:32pm the temperature at Denver International Airport reached a scorching 96 degrees.  This smashes the old record of 93 degrees set 30 years ago in 1980. 

The 96 degree mark today is also the highest temperature ever recorded in Denver this late in the year.  Previously 96 degrees was recorded on September 13, 1990 and in previous years.

Mercifully here in Thornton we weren’t quite as warm.  We recorded a high of 93.6 degrees at 3:20pm.

• Don’t miss: Do Denver weather and climate records have an asterisk attached?

The temperature today was not a record high for the month of September however.  That mark would be 97 degrees set on the 1st of the month in 1995, the 4th in 1995 and the 5th in 1899. 

More heat is on tap for tomorrow as Denver will approach the 90 degree mark.  The record high for September 20th is  92 degrees set in 1956.

Along with the heat and lack of humidity also comes fire danger.  A Red Flag Warming will go into effect on Monday from noon until 9:00pm.  We have seen how dangerously dry the weather has been with the Fourmile Canyon Fire and the Reservoir Road Fire in the last few weeks.  Please be careful.

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• Do Denver weather and climate records have an asterisk attached?
• Data shows Denver weather records skewed by move to DIA
• Does it matter if Denver weather and climate records are skewed?