Home/BlogThe Version 6.1 global average lower tropospheric temperature (LT) anomaly for June, 2025 was +0.48 deg. C departure from the 1991-2020 mean, down slightly from the May, 2025 anomaly of +0.50 deg. C.
The Version 6.1 global area-averaged linear temperature trend (January 1979 through June 2025) now stands at +0.16 deg/ C/decade (+0.22 C/decade over land, +0.13 C/decade over oceans).
The following table lists various regional Version 6.1 LT departures from the 30-year (1991-2020) average for the last 18 months (record highs are in red).
| YEAR | MO | GLOBE | NHEM. | SHEM. | TROPIC | USA48 | ARCTIC | AUST |
| 2024 | Jan | +0.80 | +1.02 | +0.58 | +1.20 | -0.19 | +0.40 | +1.12 |
| 2024 | Feb | +0.88 | +0.95 | +0.81 | +1.17 | +1.31 | +0.86 | +1.16 |
| 2024 | Mar | +0.88 | +0.96 | +0.80 | +1.26 | +0.22 | +1.05 | +1.34 |
| 2024 | Apr | +0.94 | +1.12 | +0.76 | +1.15 | +0.86 | +0.88 | +0.54 |
| 2024 | May | +0.78 | +0.77 | +0.78 | +1.20 | +0.05 | +0.20 | +0.53 |
| 2024 | June | +0.69 | +0.78 | +0.60 | +0.85 | +1.37 | +0.64 | +0.91 |
| 2024 | July | +0.74 | +0.86 | +0.61 | +0.97 | +0.44 | +0.56 | -0.07 |
| 2024 | Aug | +0.76 | +0.82 | +0.69 | +0.74 | +0.40 | +0.88 | +1.75 |
| 2024 | Sep | +0.81 | +1.04 | +0.58 | +0.82 | +1.31 | +1.48 | +0.98 |
| 2024 | Oct | +0.75 | +0.89 | +0.60 | +0.63 | +1.90 | +0.81 | +1.09 |
| 2024 | Nov | +0.64 | +0.87 | +0.41 | +0.53 | +1.12 | +0.79 | +1.00 |
| 2024 | Dec | +0.62 | +0.76 | +0.48 | +0.52 | +1.42 | +1.12 | +1.54 |
| 2025 | Jan | +0.45 | +0.70 | +0.21 | +0.24 | -1.06 | +0.74 | +0.48 |
| 2025 | Feb | +0.50 | +0.55 | +0.45 | +0.26 | +1.04 | +2.10 | +0.87 |
| 2025 | Mar | +0.57 | +0.74 | +0.41 | +0.40 | +1.24 | +1.23 | +1.20 |
| 2025 | Apr | +0.61 | +0.77 | +0.46 | +0.37 | +0.82 | +0.85 | +1.21 |
| 2025 | May | +0.50 | +0.45 | +0.55 | +0.30 | +0.15 | +0.75 | +0.99 |
| 2025 | June | +0.48 | +0.48 | +0.47 | +0.30 | +0.81 | +0.05 | +0.39 |
The full UAH Global Temperature Report, along with the LT global gridpoint anomaly image for June, 2025, and a more detailed analysis by John Christy, should be available within the next several days here.
The monthly anomalies for various regions for the four deep layers we monitor from satellites will be available in the next several days at the following locations:
Not a scientist here, just a weather enthusiast with a very dated education in weather and climate. A year or two ago, I marked up a copy of this chart noting major El Niño and La Niña events. For me, it explained the cyclical nature of the temperature graph. Last time I looked we were ENSO neutral, but since that phenomenon has a cyclical nature to it, it would not surprise me if we weren’t hading for a La Niña and slower increases.
As an aside, related to UHI, our NWS office – Wilmington, Ohio – noted several temperature records for June in Dayton, Ohio. Every one of them was a record LOW. I know it is anecdotal, but it seems to fit with the idea/theory that UHI is a very important factor in recent warming trends.
I am praying for you, Roy. With God’s grace you will get through this time. I really appreciate your work and how you are trying to make your contribution to a better world.
Second warmest June, beaten only by last year’s.
Year Anomaly
1 2024 0.69
2 2025 0.48
3 1998 0.44
4 2019 0.34
5 2023 0.30
6 2020 0.29
7 2016 0.21
8 1991 0.18
9 2010 0.18
10 2015 0.18
My projection for the year increases slightly to 0.50 +/- 0.12C, with it looking increasingly likely that 2025 will be warmer than 2023. But we will see.
Recent changes at the poles have had a major effect on CFSR data. It will be interesting to see where this goes. It could throw off your “projection” by a significant amount.
https://oz4caster.wordpress.com/wp-content/uploads/2025/07/d1-gfs-gta-daily-2025-07-02.gif
That’s why I said “We will see”.
I was going to mention the big drop in land temperatures as seen here
https://pulse.climate.copernicus.eu/
It certainly looks that much of South America has turned very cold. But I don’t know how much significance to put on 1 day.
Or …. we could see some major cooling.
https://oz4caster.wordpress.com/wp-content/uploads/2025/07/d1-gfs-gta-daily-2025-07-02.gif
Just weather. Antarctica has large variations this time of year.
Think this may be the first time UAH has hit a rate of +0.16C per decade warming for any period exceeding 360 months (30-years).
It’s been +0.16C/dec before a couple of times previously; once in the late 1990s and again in the early 2000s; but never before over a period spanning 30-years or more. (30-years being the standard period of reference in climatology, as far as I’m aware?)
Right, and by 2014 the trend had dropped to +0.11 C/decade. The trend line rises and falls.
https://oz4caster.wordpress.com/wp-content/uploads/2025/07/d4-gfs-gta-daily-2014-2025-07-02.gif
Looks like CFSR is trending lower.