Home/BlogThe Version 6.1 global average lower tropospheric temperature (LT) anomaly for August, 2025 was +0.39 deg. C departure from the 1991-2020 mean, up a little from the July, 2025 anomaly of +0.36 deg. C.
The Version 6.1 global area-averaged linear temperature trend (January 1979 through August 2025) remains 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 20 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 |
| 2025 | July | +0.36 | +0.49 | +0.23 | +0.45 | +0.32 | +0.40 | +0.53 |
| 2025 | Aug | +0.39 | +0.39 | +0.39 | +0.16 | -0.06 | +0.69 | +0.11 |
The full UAH Global Temperature Report, along with the LT global gridpoint anomaly image for August, 2025, and a more detailed analysis by John Christy, should be available within the next several days here.
The anomaly in the tropics (20N – 20S) has dropped considerably, to +0.16 deg. C. The U.S. was below the 30-year average in August.
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:
Thank you Dr Spencer!
Let’s do this no TDS month
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A Republican Minnesota state senator who was caught in a sting operation resigned under fire Thursday after he was charged with soliciting a minor for prostitution, stepping down before the Senate could vote on whether to expel him.
According to Eichorn’s profile, which has now been removed from the Senate website, he is married with four children. He listed his profession as entrepreneur and was first elected in 2016. He got some national attention earlier this month as one sponsor of a not-very-serious bill that would have designated “Donald derangement syndrome” as a mental illness.
https://apnews.com/article/senator-justin-eichorn-resigns-b79bc500b740f61d1e5f280e3822fb9b
Same temperature as August 1998, which makes this the equal third warmest August in the UAH data set.
Year Anomaly
1 2024 0.76
2 2023 0.61
3 1998 0.39
4 2025 0.39
5 2016 0.32
6 2020 0.30
7 2017 0.29
8 2019 0.25
9 2022 0.24
10 2010 0.21
https://oz4caster.wordpress.com/wp-content/uploads/2025/09/d4-gfs-gta-daily-2014-2025-09-01.gif says the same.
The important number is the Tropics. Looks like a new La Nina is getting started which will spread its effects towards the poles over the next 6 months.
I would also expect more cooling from the Hunga-Tonga warming effect dissipating. We might even reach negative anomalies again.
The biggest question is still the AMO. When the AMO phase change takes place we should see an increase in clouds along with further cooling. We are at the same place in the cycle as the early 1960s. We all know what happened then.
https://www.youtube.com/watch?v=RQRqr9_jw5I
You can ‘expect’ all you want, but there wasn’t a H-T warming effect to begin with so there will be no cooling from it either.
The HTE can be seen in the UAH chart above. It correlates well with the early Polar Vortex disruption followed by the Stratospheric water vapor, as shown here:
https://postimg.cc/DWDB8Tww
Now you might say that “correlation is not causation”, which is true. But the causation is backed by solid physics, unlike with the CO2 nonsense.
“But the causation is backed by solid physics”
which you are never able to show us…so this is another post that can be safely ignored.
The important number is the trend. When will that drop to zero? Not in our lifetime.
The LINEAR trend?
I thought the important number was DC, specifically summer days.
Please advise.
LOL!
The old link to data https://www.nsstc.uah.edu/data/msu/v6.0/tlt/
seems dead. The new link http://nsstc.uah.edu/climate/ leads to a global report page. It has a link to data through 2024. Does the change to version 6.1 eliminate the monthly summary files?
Try https://www.nsstc.uah.edu/data/msu/v6.1/tlt/ instead.