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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 forecasts initialized between Thursday 14th August 2025 and Thursday 21st August 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
CMAandFDU	1	FengshunAdjust	1	0.086	0.169	0.023	0.006	0.002	-0.059	0.036	0.006	0.15	0.119	0.105	0.13
CMAandFDU	1	FengshunHybrid	2	0.072	0.132	0.026	-0.0	0.028	-0.033	0.038	0.008	0.035	0.123	0.116	0.057
CMAandFDU	1	Fengshun	10	0.016	0.055	-0.006	-0.075	0.032	-0.067	0.021	-0.029	0.02	-0.037	0.083	0.06
MicroEnsemble	2	StillLearning	3	0.072	0.104	0.046	0.027	0.03	0.024	0.067	-0.01	0.038	0.096	0.105	0.071
MicroEnsemble	2	MicroDuet	4	0.072	0.105	0.041	0.026	0.031	0.03	0.061	-0.0	0.037	0.063	0.106	0.077
MicroEnsemble	2	Huracan	9	0.036	0.034	0.039	0.006	0.018	0.022	0.056	-0.009	-0.038	-0.035	0.083	0.033
AIFS	3	AIFSgaia	5	0.065	0.097	0.032	0.011	0.043	-0.009	0.079	-0.069	0.03	0.094	0.113	0.037
AIFS	3	AIFShera	6	0.065	0.082	0.044	0.001	0.032	0.01	0.077	-0.053	0.083	0.045	0.106	0.078
AIFS	3	AIFSthalassa	8	0.048	0.082	0.013	-0.038	0.028	-0.055	0.026	-0.064	0.005	0.067	0.096	-0.024
LP	4	LPM	7	0.061	0.08	0.055	0.038	0.015	-0.003	0.065	-0.002	0.033	0.041	0.103	0.031
KITKangu	5	KanguPlusPlus	11	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	11	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	11	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	11	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	11	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	KanguS2SEasyUQ	38	-1.28	-1.373	-1.141	-1.284	-1.169	-1.235	-1.095	-1.036	-1.403	-1.37	-1.222	-1.826
CliMA	7	CliMAWeather2	16	-0.075	-0.092	-0.09	-0.192	-0.038	0.046	-0.066	-0.109	-0.144	-0.159	-0.065	-0.012
CliMA	7	CliMAWeather	17	-0.078	-0.095	-0.095	-0.197	-0.042	0.045	-0.069	-0.113	-0.143	-0.163	-0.07	-0.019
WindBorne	8	WeatherMesh	18	-0.179	-0.128	-0.237	-0.189	-0.207	-0.337	-0.244	-0.244	-0.139	-0.196	-0.176	-0.183
FengWuW2S	9	FengWu2	19	-0.275	-0.172	-0.467	-0.154	-0.396	-0.224	-0.509	-0.109	-0.056	-0.344	-0.564	-0.245
FengWuW2S	9	FengWu	22	-0.305	-0.381	-0.323	-0.236	-0.181	-0.103	-0.308	-0.199	-0.416	-0.512	-0.412	-0.3
NordicS2S	10	NordicS2S1	20	-0.285	-0.208	-0.372	-0.324	-0.185	-0.39	-0.241	-0.326	-0.226	-0.257	-0.198	-0.399
NordicS2S	10	NordicS2S3	23	-0.421	-0.397	-0.506	-0.378	-0.379	-0.414	-0.409	-0.445	-0.516	-0.42	-0.387	-0.54
NordicS2S	10	NordicS2S2	29	-0.573	-0.634	-0.611	-0.445	-0.418	-0.387	-0.308	-0.715	-0.82	-0.534	-0.535	-0.66

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	StillLearning	1	0.054	0.094	0.026	0.033	0.044	0.001	0.048	0.026	0.089	0.068	0.048	0.123
MicroEnsemble	1	MicroDuet	2	0.052	0.087	0.02	0.053	0.039	0.019	0.038	0.047	0.101	0.034	0.043	0.107
MicroEnsemble	1	Huracan	7	0.016	0.022	0.002	0.057	0.031	-0.005	0.032	0.04	0.047	-0.052	0.0	0.065
CMAandFDU	2	FengshunHybrid	3	0.048	0.075	0.036	0.022	0.009	0.025	0.045	0.03	0.045	0.063	0.056	0.069
CMAandFDU	2	FengshunAdjust	4	0.046	0.08	0.035	0.019	0.017	0.014	0.039	0.048	0.065	0.051	0.053	0.131
CMAandFDU	2	Fengshun	9	0.005	0.018	0.01	0.016	0.013	-0.031	0.02	-0.017	-0.002	-0.014	0.032	0.069
LP	3	LPM	5	0.036	0.065	0.018	0.018	0.032	-0.026	0.024	0.047	0.051	0.031	0.043	0.058
AIFS	4	AIFSgaia	6	0.025	0.046	0.004	0.024	0.012	0.009	0.031	-0.004	0.083	0.016	0.018	0.033
AIFS	4	AIFShera	8	0.012	0.023	-0.004	0.023	0.015	-0.013	0.036	-0.038	0.075	-0.003	0.007	0.051
AIFS	4	AIFSthalassa	10	0.002	-0.01	0.007	-0.004	0.012	0.012	0.02	0.002	0.011	-0.061	0.009	-0.011
KITKangu	5	KanguPlusPlus	11	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	11	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	11	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	11	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	11	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	KanguS2SEasyUQ	38	-1.419	-1.522	-1.373	-1.09	-1.149	-1.365	-1.237	-1.406	-1.511	-1.626	-1.306	-1.299
CliMA	7	CliMAWeather	16	-0.173	-0.221	-0.203	-0.181	-0.094	-0.026	-0.101	-0.103	-0.155	-0.391	-0.247	-0.106
CliMA	7	CliMAWeather2	17	-0.181	-0.227	-0.214	-0.192	-0.1	-0.033	-0.113	-0.111	-0.171	-0.408	-0.251	-0.105
NordicS2S	8	NordicS2S1	18	-0.25	-0.279	-0.192	-0.2	-0.153	-0.319	-0.176	-0.146	-0.284	-0.444	-0.195	-0.228
NordicS2S	8	NordicS2S3	24	-0.473	-0.701	-0.245	-0.14	-0.275	-0.396	-0.214	-0.431	-0.649	-0.821	-0.338	-0.485
NordicS2S	8	NordicS2S2	29	-0.581	-0.69	-0.602	-0.498	-0.299	-0.355	-0.416	-0.628	-0.671	-0.849	-0.465	-0.378
FengWuW2S	9	FengWu2	19	-0.255	-0.224	-0.437	0.032	-0.256	0.018	-0.264	-0.212	-0.066	-0.257	-0.529	-0.247
FengWuW2S	9	FengWu	20	-0.305	-0.408	-0.315	-0.035	-0.138	-0.107	-0.174	-0.214	-0.411	-0.517	-0.398	-0.3
HAPPY	10	AZN	21	-0.418	-0.493	-0.407	-0.788	-0.226	-0.179	-0.326	-0.478	-0.761	-0.353	-0.311	-0.654