With the first full month of fall here, October usually brings one of the quietest weather months in the Denver area with plenty of mild, sunny days and clear, cool nights.
October is historically the second sunniest month and conditions are generally calm.
However we also will usually see our first taste of winter during the month with the first freeze and first snowfall of the season. Temperatures as well will start to drop and by the end of the month the average nighttime lows are below freezing.
Thornton, Colorado August 2022 Temperature Summary. (ThorntonWeather.com)
Looking back on August 2022, by far the most notable weather feature was the temperatures. They were stubbornly warm, refusing to show the usual decrease toward the end of the month we expect to see.
Thornton’s overall average temperature for the month came in at 73.7 degrees. This was well above our 16-year running average for August of 71.6 degrees. This put it in the books as Thornton’s fourth warmest August out of the past 16.
Denver was considerably warmer with an average temperature of 76.1 degrees for the month. This was well above the Mile High City’s historical average of 72.9 degrees (1991 – 2020). August 2022 goes into the books as the fourth warmest August on record in Denver.
Precipitation was fleeting and came in spurts during the month but Thornton’s rain bucket tallied near normal precipitation. We recorded 1.43 inches, a bit above the 1.23 inches average for August over the past 16 years. More than half of that fell on the 15th and 16th of the month.
Denver pretty much matched our total with 1.45 inches of rain. That was slightly less than the historical August average for the Mile High City of 1.58 inches.
Following an August that was unseasonably warm and dry, we find ourselves heading into September hoping for relief. The month can bring plenty of rain and even our first snow of the season but more often than not, it is one of the most pleasant along the Colorado Front Range.
As temperatures start to drop, September usually reminds us that summer is at an end and fall is now here. Sunshine is predominant though as the month actually has the highest percentage of sun out of any month. Sunny days and clear, cool nights are the standard weather pattern for the month.
The month can bring extremes however. We will of course forever remember 2013’s devastating floods brought on by record-setting rain. Longtime residents might remember September 1971 which brought over 17 inches of snowfall.
Thornton, Colorado June 2022 Temperature Summary. Click for larger view.
Last month was one of relatively little drama. Normally we expect June to bring plenty of severe weather but that just was not the case this year. That was, in part, due to a lack of moisture.
Thornton saw only 0.52 inches in the rain bucket, well-below average. While we did see some hot temperatures (two 98 degree readings being tops), overall the monthly average temp came in right near Thornton’s running 16 year average.
Change is of course the one constant in Denver’s weather but come July, things actually get pretty consistent.
The standard formula for a day in July is a sunny morning, clouds developing in the late morning and early afternoon. Come mid-afternoon, thunderstorms are rolling off of the foothills and into the metro area and the eastern plains. These storms do occasionally reach severe status containing hail, gusty winds and heavy downpours of rain.
Extreme weather can occur during in month in Colorado we well know. June however is when traditional spring severe weather arrives in the state oftentimes with hail, damaging wind and tornadoes.
Over 40 percent of the tornadoes that occur in Colorado happen during the month of June. Far more common are thunderstorms with hail and wind, each responsible for extensive damage each year.
While severe weather is common, so too are brilliantly sunny and mild days as we close out spring and enter summer. If you are looking for cold, it isn’t likely but it is possible as the Denver area has seen freezing temperatures and yes, even snow, during the month.
Colorado’s famously highly variable weather seems to showcase itself during the month of May when a variety of weather conditions can be seen.
Winter-like temperatures and snow are possible as are mid-summer like temperatures or the more typical spring severe weather.
As the month starts out in 2022 we are going to enjoy some much-needed precipitation. Long range forecasts however portend a potentially drier than normal month.
The month can certainly bring extremes. Snow is not entirely uncommon during the month, oftentimes causing damage to newly bloomed trees. More common however is severe weather, particularly in the latter half of the month. Thunderstorms become more frequent and their associated hazards – lightning, wind, hail and tornadoes – are usual visitors.
We knew it was going to be extraordinarily warm and blustery today, particularly for April. The numbers bear it out as Denver set a record high temperature for the date, one that also tied for the second warmest April reading on record.
As measured at Denver International Airport, the Mile High City topped out at 89 degrees. That bests the previous record high for April 22nd of 88 degrees set in 1989. The reading was also the second warmest April temperature recorded in Denver history coming in second to a 90 degree reading on April 30, 1992.
Here in Thornton we were just a hair cooler with a high of 88 degrees.
The 2008 Windsor Tornado highlights the very real danger twisters present in Colorado. Do you know when to do when one strikes?
One fact that may surprise those new to Colorado is that we are actually on the western edge of the infamous Tornado Alley. This large swath of land comprises much of the nation’s midsection and is a unique place as the United States sees more tornadoes than any other place on earth. In fact, tornadoes have been recorded in all 50 states including Alaska and Hawaii.
Closer to home, Colorado sees our share of these storms. In fact, one metro area county – Weld County – holds the distinction of being the “tornado capital of the world.” With 252 tornados from 1950-2011, no single county in the nation has had more tornadoes! Adams County is number two in the state and isn’t far behind with 156 over that same period. Granted these numbers are skewed a bit simply due to the sheer size of those counties, but it does serve to highlight the real danger that tornadoes present.
One common myth is that tornadoes don’t strike metropolitan areas. This has been disproved many times including here in Colorado in 1981 when an F2 tornado struck Thornton. Image courtesy the City of Thornton archives.
The most well known tornado outbreak in the metro area occurred on June 15, 1988. Five tornadoes resulted in seven injuries and damage in excess of $15 million.
The greatest threat for tornadoes occurs during late spring and early summer when you have a combination of heat and moisture in the lower atmosphere. Here in Colorado, tornadoes are frequent from May through August with June being the most active month.
Colorado ranks 10th in terms of the number of tornadoes with 1,911 events from 1950-2011. One good thing is that our high altitude and drier air do make it harder for the monster supercells that spawn the biggest tornadoes to form. Most of our tornadoes are small and short lived. Further, thanks to the wide open spaces of the eastern half of our state, many strike sparsely populated areas. This is reflected in the fact that we rank 38th for tornado related deaths.
April marks a transition between winter and summer for most of the country but for Denver it is especially true as we can see a stunning variety of weather.
The proverbial April showers are certainly a possibility for Denver. Snow? Tornadoes? Thunderstorms? You bet – all can happen!
For good measure throw in a chance for hail and even dust storms and April gives every type of weather condition you could like – or hate.
With the first full month of fall here, October usually brings one of the quietest weather months in the Denver area with plenty of mild, sunny days and clear, cool nights.
Following an August that was unseasonably warm and dry, we find ourselves heading into September hoping for relief. The month can bring plenty of rain and even our first snow of the season but more often than not, it is one of the most pleasant along the Colorado Front Range.
Extreme weather can occur during in month in Colorado we well know. June however is when traditional spring severe weather arrives in the state oftentimes with hail, damaging wind and tornadoes.
