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This page provides an overview of regional forecast skill for the SON 2025 period. Forecast scores are updated automatically every week throughout the competitive period. The current data includes 7 forecasts initialized between Thursday 14th August 2025 and Thursday 25th September 2025 (inclusive). For a detailed description of the outputs, please refer to the section's overview.

Regional skill score files

All regional RPSSs are available to download via the following link:

SON 2025 Regional RPSSs (Excel format)

Regional scores for the top 10 teams of global, period-aggregated, variable-averaged RPSSs

Team name	Team rank	Model name	Model rank	Global	Tropics	NHem. ExTro.	SHem. ExTro.	NHem. Polar	SHem. Polar	Europe	N. Amer.	S. Amer.	Africa	Asia	Oceania
MicroEnsemble	1	MicroDuet	1	0.071	0.108	0.038	0.061	0.035	0.018	0.01	0.052	0.075	0.068	0.074	0.128
MicroEnsemble	1	StillLearning	2	0.065	0.098	0.038	0.053	0.032	0.023	0.013	0.048	0.064	0.09	0.067	0.121
MicroEnsemble	1	Huracan	9	0.03	0.029	0.026	0.043	0.03	0.017	0.002	0.05	-0.0	-0.044	0.046	0.069
CMAandFDU	2	FengshunHybrid	3	0.058	0.103	0.023	0.024	0.017	-0.003	-0.0	0.058	0.091	0.102	0.046	0.052
CMAandFDU	2	FengshunAdjust	4	0.058	0.116	0.015	0.017	-0.009	-0.008	0.009	0.036	0.122	0.104	0.038	0.072
CMAandFDU	2	Fengshun	11	0.001	0.022	-0.007	-0.016	0.001	-0.069	0.012	0.022	0.016	-0.006	0.015	-0.036
LP	3	LPM	5	0.045	0.062	0.034	0.038	0.033	-0.002	-0.006	0.047	0.049	0.029	0.062	0.065
AIFS	4	AIFShera	6	0.04	0.048	0.035	0.023	0.039	0.002	0.019	0.042	0.068	0.026	0.051	0.042
AIFS	4	AIFSgaia	7	0.038	0.063	0.021	0.01	0.022	-0.014	0.013	0.037	0.049	0.045	0.039	0.026
AIFS	4	AIFSthalassa	8	0.03	0.047	0.019	0.018	0.027	-0.006	0.005	0.026	0.042	0.022	0.039	0.033
scienceAI	5	findforecast	10	0.001	0.001	-0.008	0.025	-0.001	0.01	-0.016	0.032	-0.006	-0.013	-0.018	0.039
scienceAI	5	zephyr	12	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0
scienceAI	5	ngcm	12	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0
KITKangu	6	KanguPlusPlus	12	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0
KITKangu	6	KanguParametricPrediction	12	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0
KITKangu	6	KanguS2SEasyUQ	34	-1.074	-1.185	-0.987	-1.039	-0.866	-0.931	-1.017	-0.992	-1.242	-1.2	-0.992	-1.242
CliMA	7	CliMAWeather2	16	-0.12	-0.14	-0.153	-0.117	-0.067	-0.015	-0.104	-0.108	-0.148	-0.192	-0.135	-0.098
CliMA	7	CliMAWeather	21	-0.31	-0.359	-0.323	-0.387	-0.262	-0.145	-0.286	-0.149	-0.338	-0.396	-0.411	-0.449
FengWuW2S	8	FengWu2	17	-0.177	-0.197	-0.257	-0.019	-0.134	-0.015	-0.201	-0.126	-0.097	-0.312	-0.315	-0.131
FengWuW2S	8	FengWu	19	-0.227	-0.326	-0.18	-0.096	-0.061	-0.167	-0.146	-0.137	-0.337	-0.432	-0.242	-0.223
WindBorne	9	WeatherMesh	18	-0.182	-0.16	-0.139	-0.311	-0.129	-0.482	-0.2	-0.202	-0.202	-0.164	-0.105	-0.24
HAPPY	10	AZN	20	-0.233	-0.251	-0.245	-0.491	-0.295	0.084	-0.098	-0.324	-0.257	-0.191	-0.281	-0.515

Team name	Team rank	Model name	Model rank	Global	Tropics	NHem. ExTro.	SHem. ExTro.	NHem. Polar	SHem. Polar	Europe	N. Amer.	S. Amer.	Africa	Asia	Oceania
MicroEnsemble	1	MicroDuet	1	0.054	0.088	0.013	0.061	0.022	0.033	-0.015	0.058	0.061	0.065	0.038	0.101
MicroEnsemble	1	StillLearning	2	0.05	0.082	0.015	0.047	0.022	0.037	-0.017	0.051	0.051	0.08	0.039	0.093
MicroEnsemble	1	Huracan	7	0.017	0.023	-0.004	0.05	0.017	0.021	-0.031	0.055	0.006	-0.034	0.006	0.055
CMAandFDU	2	FengshunAdjust	3	0.043	0.086	0.009	0.008	0.002	0.008	-0.0	0.041	0.065	0.102	0.024	0.047
CMAandFDU	2	FengshunHybrid	4	0.038	0.071	0.009	0.022	0.0	0.019	-0.005	0.051	0.039	0.065	0.018	0.042
CMAandFDU	2	Fengshun	9	0.004	0.019	0.005	-0.01	0.005	-0.054	0.013	0.04	0.011	-0.002	0.006	-0.04
LP	3	LPM	5	0.028	0.046	0.004	0.018	0.022	0.025	-0.033	0.054	0.024	0.018	0.027	0.04
AIFS	4	AIFSgaia	6	0.022	0.043	0.0	-0.004	0.009	0.016	-0.016	0.051	0.054	0.015	0.0	0.015
AIFS	4	AIFShera	8	0.015	0.024	0.001	-0.005	0.014	0.017	-0.006	0.024	0.052	0.013	-0.003	0.027
AIFS	4	AIFSthalassa	15	-0.004	-0.017	-0.003	-0.004	0.014	0.025	-0.014	0.034	0.008	-0.084	-0.007	0.014
KITKangu	5	KanguPlusPlus	10	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0
KITKangu	5	KanguParametricPrediction	10	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0
scienceAI	5	zephyr	10	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0
scienceAI	5	ngcm	10	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0
scienceAI	5	findforecast	14	-0.004	-0.009	-0.006	0.025	0.012	0.004	-0.001	0.032	-0.022	-0.003	-0.021	0.026
KITKangu	5	KanguS2SEasyUQ	32	-1.124	-1.244	-1.05	-1.073	-0.91	-0.99	-0.999	-1.143	-1.171	-1.411	-1.032	-1.132
CliMA	7	CliMAWeather2	16	-0.156	-0.189	-0.212	-0.12	-0.065	-0.022	-0.17	-0.128	-0.18	-0.256	-0.193	-0.163
CliMA	7	CliMAWeather	20	-0.35	-0.403	-0.371	-0.397	-0.287	-0.225	-0.258	-0.154	-0.35	-0.478	-0.483	-0.47
FengWuW2S	8	FengWu2	17	-0.186	-0.251	-0.243	0.029	-0.09	0.08	-0.128	-0.2	-0.125	-0.32	-0.297	-0.122
FengWuW2S	8	FengWu	18	-0.243	-0.371	-0.19	-0.066	-0.051	-0.123	-0.117	-0.185	-0.374	-0.478	-0.228	-0.238
HAPPY	9	AZN	19	-0.261	-0.318	-0.232	-0.604	-0.25	0.007	-0.182	-0.322	-0.429	-0.239	-0.205	-0.544
WindBorne	10	WeatherMesh	21	-0.352	-0.364	-0.193	-0.64	-0.271	-0.732	-0.243	-0.359	-0.369	-0.239	-0.222	-0.628