Solar Energy Summary (w/m²)

Data last updated 9/26/2025 7:55 PM.   Daily Detail Monthly Summary Seasonal Summary

Maximum Solar Energy
Date	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
2025	644	822	1045	1211	1430	1317	1037	1086	1020*	---	---	---	1430*
2024	691	1125	1181	1139	1333	1352	1390	1245	1072	930	614	449	1390
2023	617	1004	1165	1151	1304	1215	1274	1199	970	963	788	504	1304
2022	722	907	1185	1266	1260	1304	1296	1164	1155	1016	715	659	1304
2021	747	1018	1190	1093	1241	1271	1158	1055	1039	967	803	633	1271
2020	770	1039	1132	1310	1257	1273	1283	1164	1007	821	805	603	1310
2019	742	928	1185	1130	1325	1329	1148	1102	1092	654	724	671	1329
2018	631	849	1204	1280	1160	1419	1266	1162	956	842	809	656	1419
2017	779	926	1171	1288	1264	1327	1357	1155	916	838	740	621	1357
2016	693	872	902	1093	1260	1322	1187	1144	830	814	647	584	1322
2015	828	1062	1141	1382	1301	1362	1253	1262	1028	865	689	580	1382
2014	629	962	1144	1215	1362	1461	1296	1195	1065	940	679	629	1461
2013	722	979	1320	1313	1313	1345	1264	1345	1202	981	693	455	1345
2012	708	895	1060	1164	1329	1413	1271	1215	1123	933	759	547	1413
2011	696	1020	1155	1215	1348	1410	1238	1232	1107*	1020*	663*	559	1410*
2010	677	933	997	1229	1403	1287	1246	1167	1109	969	710	601	1403
2009	---	---	---	---	---	---	---	---	1037*	898	846	628	1037*
Max	828	1125	1320	1382	1430	1461	1390	1345	1202	1020	846	671	1461
Average Maximum Solar Energy
Date	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
2025	313	391	617	836	836	862	881	821	745*	---	---	---	702*
2024	288	465	678	771	956	1019	1021	870	742	573	405	246	670
2023	233	546	708	846	1012	935	947	820	697	598	437	110	658
2022	398	601	796	908	921	1009	1000	974	801	651	486	376	744
2021	310	540	738	749	890	1021	682	850	729	581	470	320	657
2020	349	507	559	927	981	1036	1037	970	711	505	426	290	692
2019	349	579	799	760	832	1007	967	901	716	446	413	321	674
2018	367	508	733	782	877	1052	970	897	735	498	351	323	675
2017	396	611	743	840	905	968	978	901	626	580	423	364	695
2016	430	537	606	773	956	980	963	872	689	450	392	177	652
2015	469	608	729	936	997	1005	999	1028	762	566	486	295	740
2014	359	365	680	703	996	1022	1039	947	795	611	404	302	687
2013	333	563	761	913	947	966	1042	1024	854	379	450	60	691
2012	405	570	712	848	979	1016	1046	990	806	596	416	257	720
2011	393	542	697	797	912	1018	1018	931	737*	592*	406*	306	696*
2010	386	449	643	877	996	1007	999	909	715	685	431	324	703
2009	---	---	---	---	---	---	---	---	685*	552	451	359	468*
Avg	361	524	700	829	937	995	974	919	738	554	428	277	687
Minimum Maximum Solar Energy
Date	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
2025	0	0	0	332	209	0	576	302	111*	---	---	---	0*
2024	0	42	123	202	235	328	0	314	0	0	103	0	0
2023	53	97	120	234	529	271	454	135	223	148	0	0	0
2022	58	105	162	148	214	309	0	596	199	220	79	53	0
2021	86	54	105	158	199	466	0	352	176	53	104	0	0
2020	88	63	63	355	404	0	719	360	185	74	86	47	0
2019	60	121	206	220	232	338	306	130	360	130	84	40	40
2018	0	86	35	0	216	221	366	555	213	93	53	33	0
2017	100	109	60	279	251	230	445	591	0	0	0	67	0
2016	142	88	158	91	346	176	329	311	287	0	56	0	0
2015	116	141	287	171	274	199	772	628	304	142	97	65	65
2014	0	0	0	0	0	318	301	359	510	137	30	49	0
2013	0	0	190	211	257	239	338	823	315	0	111	0	0
2012	46	107	0	200	202	322	756	599	120	149	0	0	0
2011	79	51	109	146	153	432	759	149	0*	111*	0*	46	0*
2010	86	60	227	308	657	192	211	221	98	146	118	51	51
2009	---	---	---	---	---	---	---	---	338*	0	118	76	0*
Min	0	0	0	0	0	0	0	130	0	0	0	0	0

Color Key
< 100	100 - 200	200 - 300	300 - 400	400 - 500	500 - 600	600 - 700	700 - 800	800 - 900	900 - 1000	1000 - 1100	1100 - 1200	1200>

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