From Roy Spencer, PhD

June 5th, 2025 by Roy W. Spencer, Ph. D.

The Version 6.1 global average lower tropospheric temperature (LT) anomaly for May 2025 was +0.50 deg. C departure from the 1991-2020 mean, down from the April 2025 anomaly of +0.61 deg. C.

The Version 6.1 global area-averaged linear temperature trend (January 1979 through May 2025) remains at +0.15 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 17 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

The full UAH Global Temperature Report, along with the LT global gridpoint anomaly image for May 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:

Lower Troposphere

Mid-Troposphere

Tropopause

Lower Stratosphere