Portland, Oregon 2021-10-13 20:27:37 –
Portland, Oregon (KOIN) – You may have noticed that it was very cool at the beginning of October this year.
From September 1st to October 13th, there were only 11 days in the 1970s, but in Portland it’s well below the average for the last two weeks. Talk about the intense summer-autumn jumps in Willamette Valley. It rained on the 70th day.
Most of September should be spent in the 70’s. From the beginning of September to the beginning of October, there should be about 28 days in the 70’s. The average maximum temperature in early October is about 80 degrees Celsius. By the start of December, the average highs will be in the late 40s.
The figure below shows the high climate transition from September to December. The big numbers are the temperatures we are in that month (September = 80, October = 71, November = 58, December = 49). It drops by 30 degrees from the beginning of the autumn month to the beginning of winter.
From that point on, the sunrise and sunset will be from 6:32 am / 7:47 pm to 7:30 am / 4:28 pm. Seasonal changes are reflected in the Pacific Northwest (PNW) temperature.
What happened to the fall transition? How will the average high for the last 30 years fall? Of course, these average high temperatures do not occur each year. The climate is over a period of time, which is an average of 30 years. That is, it can be colder or warmer than the previous year. This year, we’re seeing the pendulum swing in the opposite direction after the summer is above average.
Going back and looking at the coldest October highs over the last three decades and years, temperatures were seen in the late to mid-1950s. There are a handful of years when October may bring a day in the forties. In 1991, there was a day when the daily maximum temperature was 43 degrees Celsius. Talk about a winter day hiding in October. Last year, I was in my 40s, and there were days that were 15 to 20 degrees lower than the average. The maximum daytime temperatures in October are 20% likely to be in your 40s. That hasn’t happened yet in October of this year.
There is a 20% chance that there will be no morning temperatures below 40 degrees Celsius in October. This has happened six times in the last 30 years in Portland. Average temperatures in the morning of October are not below 40 degrees Celsius, but in most years they are in their thirties for at least a day or two. That’s exactly what happened here in Portland the last few mornings. If you have an 80% chance of being in your thirties, what about freezing?
From 1991 to 2020, it reached 26.6% below 32 degrees in October. Only 13.3% fell below 30 degrees in October of that 30-year period. It doesn’t happen often, but Mother Nature can sometimes bring in that icy air. The lowest temperature in October for the last 30 years was 27 degrees Celsius in 1991.
The figure below shows the lowest temperature in October from 1991 to 2020. The lowest temperature in 2014 was 47 degrees (mild). It is worth noting that in the last decade, the coldest mornings in October have had a minimum temperature of more than 40 higher than in the last 20 years. For the past two years, there have been consecutive lows of 29 degrees Celsius in October.
Closed this year!
On October 12, 2021, multiple morning records were broken. It was morning when the windshield of the car and the lawn in the garden were frosted. If you happen to misplace your child’s vehicle, it may also be frosted. In the side photo you can see how frost accumulated on one of those children’s vehicles.
The earliest temperature below 32 degrees Celsius in Portland was October 8, 1985. Extensive frost is expected in the area during this time. We know that it happens in October, so we can emphasize that it happens in November on average. The average first 32 degree day from 1981 to 2010 is November 15th. From 1991 to 2020, the day shifted to November 16th. You can see the difference between the current 30-year average and the current 30-year average by circulating the slideshow below. Previous average.
He recently said he broke the record in the morning. You can swipe a broken morning cold slideshow from around the state. Portland and McMinville set previous records, but many have been lowered, down to Astoria and Central Oregon. Astoria reached 33 degrees, while Sun River was the lowest ever at 10 degrees. It usually takes a sunny night for the temperature to drop so low in October. It usually doesn’t snow in October because the temperature doesn’t drop when it gets damp in the fall. As I said, you already need to clean the sky after a cool afternoon.
Are we pumping in cooler air way too early this fall? Source link Are we pumping in cooler air way too early this fall?