Mid-Missouri's hottest September since 1897, explained

2 months 1 week 1 day ago Monday, September 30 2019 Sep 30, 2019 Monday, September 30, 2019 10:56:00 PM CDT September 30, 2019 in Climate
By: Kenton Gewecke, KOMU 8 Chief Meteorologist
loading

COLUMBIA - The warmest September mid-Missourians will be able to remember just occurred. This is because no one from the 1800s is alive today, and the last time Columbia recorded a September as warm as 2019's was in 1897, a difference of 122 years. However, there are major differences in how both September 1897 and 2019 came to be at the top of the record book.

SEPTEMBER 1897

The month started with three days in the 100s (for actual temperatures, not counting for the heat index). In fact, a total of four days were in the 100s. Still to this day the month holds six high temperature records. There was a cool period that lasted seven days from the 16th to the 22nd when temperatures were either seasonal or below average. During that time, one morning recorded a low of 35º, which still holds the record low for that date. So, you can see, there were large swings in the temperatures throughout the month.

It was a very dry month. A half-inch of rainfall is all that recorded, and that fell over a consecutive 48-hour period in the middle of the month. Every other day was dry.

A reminder that dry conditions will produce large swings in temperatures and can allow temperatures to get both warmer (into the 100s) and cooler (into the 30s in this case) at night.

SEPTEMBER 2019

The only below average day was felt on the first day of the month. The end of August was below average and that carried over into September for one day. Then, everything changed. The remainder of the month experienced above average temperatures with the exception of eight days which were seasonal. While a low temperature was not broken, a highest low temperature was. The last day of the month recorded a low of 69º, which bested the previous 68º highest low from 1971. However, there were zero 100-degree days. In fact, the warmest temperature felt in 2019 as a whole was 95º.

It was a below average month for precipitation with only 2.52" falling over the Columbia weather station, which left the month 1.35" below the 3.87" average. 

The month also saw very little influence from frontal systems. The jet stream, our upper-level winds that tend to steer low-pressure systems our way from the Rocky Mountains, was well north of us. Because of this, nothing was able to stop our continued Summer. Showers every now and then, along with clouds, helped to keep temperatures steadily in the 80s and 90s; playing a role in keeping our low temperatures so warm, too. The steady southerly flow didn't hurt, either.

So, if 1987 had multiple 100-degree days and still holds records and 2019 has zero high temperature records, how are they tied for first place?

LOW TEMPERATURES

The nights over the course of 2019's September were 6.7º warmer than in 1897. Meanwhile, the high temperatures in 2019 were 6.7º cooler than in 1897. Hence, the tie. 

A note on low temperatures: one of the trends we have been seeing prominently in climate has been warmer nights. Since 1970, Columbia's low temperature is, on average, 2.4º warmer.

While summer has held on, Fall weather should finally arrive by the end of the week as the coolest temps since May move into mid-MO. 

Related Stories

More News

Grid
List
COLUMBIA - Missouri's heath department has so far received three reports of flu-associated deaths as peak flu season begins. ... More >>
1 hour ago Monday, December 09 2019 Dec 9, 2019 Monday, December 09, 2019 12:00:00 PM CST December 09, 2019 in News
COLUMBIA - Starting Monday, the City of Columbia Municipal Court will offer a period of warrant amnesty. There will... More >>
9 hours ago Monday, December 09 2019 Dec 9, 2019 Monday, December 09, 2019 3:30:00 AM CST December 09, 2019 in News
COLUMBIA — The Moberly Police Department is asking for help identifying a man who robbed a gas station at gun-point... More >>
15 hours ago Sunday, December 08 2019 Dec 8, 2019 Sunday, December 08, 2019 9:50:00 PM CST December 08, 2019 in News
COLUMBIA - The Missouri Tigers have found their new head football coach. Eli Drinkwitz from Appalachian State will lead... More >>
18 hours ago Sunday, December 08 2019 Dec 8, 2019 Sunday, December 08, 2019 6:47:00 PM CST December 08, 2019 in News
TIPTON - Neighbors are reacting after authorities said Bobby Joe Moore, 43, of Sedalia, shot his ex-girlfriends' mother and hit... More >>
19 hours ago Sunday, December 08 2019 Dec 8, 2019 Sunday, December 08, 2019 6:01:00 PM CST December 08, 2019 in News
LAKE OF THE OZARKS - Restaurant owners are heading into the holiday season ready to handle the winter customers and... More >>
21 hours ago Sunday, December 08 2019 Dec 8, 2019 Sunday, December 08, 2019 3:43:00 PM CST December 08, 2019 in Continuous News
FULTON — Community members can gather at the Field of Joy in Fulton’s Veteran's Park to remember departed loved ones... More >>
22 hours ago Sunday, December 08 2019 Dec 8, 2019 Sunday, December 08, 2019 2:13:00 PM CST December 08, 2019 in News
JEFFERSON CITY - Singing pine trees and dancing blue penguins are now lighting up the night throughout Binder Park in... More >>
1 day ago Sunday, December 08 2019 Dec 8, 2019 Sunday, December 08, 2019 8:00:00 AM CST December 08, 2019 in News
AUXVASSE - A suspect has been taken into custody in Auxvasse on Saturday in relation to a shots fired incident... More >>
1 day ago Saturday, December 07 2019 Dec 7, 2019 Saturday, December 07, 2019 9:19:00 PM CST December 07, 2019 in News
FULTON - The 71st annual Christmas parade took over the streets of Fulton on Saturday afternoon. This year's theme... More >>
1 day ago Saturday, December 07 2019 Dec 7, 2019 Saturday, December 07, 2019 3:40:00 PM CST December 07, 2019 in News
COLUMBIA - Road signs honoring five Boone County veterans killed in combat in Iraq or Afghanistan were revealed Saturday. ... More >>
1 day ago Saturday, December 07 2019 Dec 7, 2019 Saturday, December 07, 2019 3:36:00 PM CST December 07, 2019 in News
CAMDEN COUNTY — One person was transported to the hospital Friday night after being ejected from their vehicle. The... More >>
1 day ago Saturday, December 07 2019 Dec 7, 2019 Saturday, December 07, 2019 3:17:00 PM CST December 07, 2019 in News
TIPTON — A shooting suspect is in the hospital after authorities shot him five times, according to a news release... More >>
2 days ago Saturday, December 07 2019 Dec 7, 2019 Saturday, December 07, 2019 8:50:00 AM CST December 07, 2019 in News
FULTON - Police are investigating after shots were fired at a Break Time in Fulton Friday night. According to... More >>
2 days ago Saturday, December 07 2019 Dec 7, 2019 Saturday, December 07, 2019 1:25:00 AM CST December 07, 2019 in News
COLUMBIA - MU spokesman Christian Basi, confirmed the man who died after being hit by a car on College Ave... More >>
2 days ago Friday, December 06 2019 Dec 6, 2019 Friday, December 06, 2019 9:34:00 PM CST December 06, 2019 in News
COLUMBIA - The Central Missouri Humane Society is waiving adoption fees this weekend, just in time for the holiday season.... More >>
2 days ago Friday, December 06 2019 Dec 6, 2019 Friday, December 06, 2019 6:36:00 PM CST December 06, 2019 in News
MISSOURI - Missouri’s minimum wage rate is set to go up again soon. The state minimum wage will increase... More >>
2 days ago Friday, December 06 2019 Dec 6, 2019 Friday, December 06, 2019 5:21:41 PM CST December 06, 2019 in News
JEFFERSON CITY - Governor Mike Parson and First Lady Teresa Parson are inviting families to join them at the Governor's... More >>
2 days ago Friday, December 06 2019 Dec 6, 2019 Friday, December 06, 2019 3:50:00 PM CST December 06, 2019 in News
Columbia, MO
Broken Clouds 45°
2pm 44°
3pm 39°
4pm 37°
5pm 35°