Are you saying that the increase in average temperature between 1895 and 2026 was 4 degrees F?
And that somehow that's a huge difference?
And please provide links to the data you're using to claim that average temperatures have increased significantly over whatever period of time you choose.
I got it from playing around with 12 month average temperatures going back to 1895 with the NOAA calculator and plotting the data. You can set US wide and whether you are looking at a particular month or a prior 12 month period. It will plot the data for you. Other agencies all over the globe record changes too, some significantly greater such as North Africa and Western Europe, some less significant. The common factor though are the changes tend to higher temperature changes, seasonal drift, rain fall changes and so on. Similar tools provided by the European Environment Agency (EEA), the UK Met Office, the Copernicus Climate Change Service (C3S)/European Center for Medium-Range Weather Forecasts (ECMWF) and other noted organizations across the globe actually show very similar results which is good to know the data is fairly accurate and validated.
https://www.ncei.noaa.gov/access/mo...e/national/time-series/110/tavg/1/8/2020-2026
4F might not seem like a lot, but it doesn't take average temperatures to vary by that many degrees to make it possible or impossible to grow certain crops in certain regions. The extra energy in the atmosphere actually becomes significant. It can also affect rainfall patterns and jet stream movement. It affects and is affected by ocean temperatures too, so for places that rely on the gulf stream may experience climate changes and not necessarily warming. Of course it has a measurable affect on Glaciers well as Arctic and Antarctic ice packs. We have adapted in some ways to these changes by developing changes in the genetic makeup of our crops to make them more temperature increase and drought resistant. Without these changes many of our crop yields would have been much lower.
If you look at the year of 1816, the "Year Without a Summer" after the Mount Tambora eruption of 1815 which spilled huge quantities of ash into the atmosphere, the annual average temperature of the US fell about 2F to 4F, yet most of that growing season's harvest's failed. Global famines were recorded for the two or three years following 1816. That all from a mere 4F lowering of average annual temperatures.
Changes of 4F average over a large continent like the US will have knock on effects in northern hemisphere changes. Note, this is changes. Not everywhere will experience warmer climates, some regions of the globe might experience lowered temperatures. It's change that is the significant word here.
Now, are these changes man-made or part of the normal earth's natural climate changes over geological timescales? I don't want to debate that because everyone probably has their opinions and I for one don't have a scientific answer, I'm not a climatologist. We have similar data for CO2 concentrations, ocean temperatures and levels, sea water salinity and pH, and even solar activity. In countries like the UK and the EU we have accurate data going back 400 years or more to the time of Sir Isaac Newton and the Royal Society. The data is there and historically accurate as it is easy to measure. The science as to why is a whole different matter.
All we can say is that the measured temperate averages for the US as a whole has increased in average annual temperature by about 4F since 1895. Utah has seen a higher change of over 6F. These numbers rise and fall in the short term, i.e. year to year, but over the past 125 years we have seen a gradual increase in temperature that is slowly increasing in the rate of change, i.e. the average increase is not a straight line but is a shallow curve upwards over 125 years. The rate of change is greater now than it has ever been if we smooth the line.
So, that's the raw data. Like I say, the explanations behind it are for the climatologists, the chemists, weather scientists and the sophisticated computer modellers to figure out. I have a PhD with a background in computer modelling but I would even begin to know how to model climate changes.
