Which municipality in canton Solothurn is the sunniest?

Gempen is the sunniest municipality in canton Solothurn, at 46.1% relative sunshine (2025).

What does relative sunshine duration mean?

The share of actual sunshine hours against the maximum possible. It makes places with short winter days fairly comparable with very sunny locations.

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Ranking · Data 2025 · Source: BFS

The sunniest municipalities in canton Solothurn (2025)

National ranking →

Gempen is the sunniest municipality in canton Solothurn: 46.1% of possible sunshine duration (2025). Next come Himmelried (46.1%) and Büren (46.1%). Source: MeteoSwiss, nearest station.

Ranking

MeteoSchweiz · 2025

Rank	Municipality	Sunshine	Residents
1	Gempen	46.1%	932
2	Himmelried	46.1%	977
3	Büren	46.1%	1'055
4	Hochwald	46.1%	1'266
5	Nuglar-St. Pantaleon	46.1%	1'546
6	Fehren	46.1%	595
7	Meltingen	46.1%	645
8	Bättwil	46.1%	1'191
9	Breitenbach	46.1%	4'304
10	Zullwil	46.1%	675
11	Nunningen	46.1%	1'973
12	Witterswil	46.1%	1'467
13	Dornach	46.1%	6'862
14	Metzerlen-Mariastein	46.1%	973
15	Hofstetten-Flüh	46.1%	3'401
16	Rodersdorf	46.1%	1'418
17	Seewen	46.1%	1'064
18	Zuchwil	44.5%	9'452
19	Etziken	44.5%	1'070
20	Recherswil	44.5%	2'180
21	Subingen	44.5%	3'285
22	Drei Höfe	44.5%	742
23	Hubersdorf	44.5%	717
24	Bolken	44.5%	593
25	Gerlafingen	44.5%	5'794
26	Horriwil	44.5%	911
27	Obergerlafingen	44.5%	1'262
28	Lohn-Ammannsegg	44.5%	2'976
29	Biberist	44.5%	9'345
30	Kriegstetten	44.5%	1'427
31	Flumenthal	44.5%	1'043
32	Derendingen	44.5%	7'008
33	Aeschi	44.5%	1'329
34	Deitingen	44.5%	2'340
35	Luterbach	44.5%	3'640
36	Hüniken	44.5%	160
37	Hauenstein-Ifenthal	44.4%	325
38	Kienberg	44.4%	528
39	Wisen	44.4%	443
40	Grindel	43.3%	517
41	Beinwil	43.3%	274
42	Erschwil	43.3%	960
43	Kleinlützel	43.3%	1'197
44	Bärschwil	43.3%	794
45	Büsserach	43.3%	2'431
46	Mümliswil-Ramiswil	43.2%	2'451
47	Holderbank	43.2%	753
48	Kammersrohr	43.2%	31
49	Hägendorf	43.2%	5'277
50	Fulenbach	43.2%	1'808
51	Aedermannsdorf	43.2%	599
52	Matzendorf	43.2%	1'374
53	Egerkingen	43.2%	4'300
54	Neuendorf	43.2%	2'404
55	Boningen	43.2%	807
56	Oensingen	43.2%	6'636
57	Wolfwil	43.2%	2'401
58	Herbetswil	43.2%	605
59	Laupersdorf	43.2%	1'897
60	Oberbuchsiten	43.2%	2'386
61	Härkingen	43.2%	1'767
62	Kappel	43.2%	3'511
63	Balsthal	43.2%	6'501
64	Gunzgen	43.2%	1'712
65	Kestenholz	43.2%	1'881
66	Niederbuchsiten	43.2%	1'301
67	Eppenberg-Wöschnau	42.6%	326
68	Stüsslingen	41.8%	1'257
69	Trimbach	41.8%	6'667
70	Starrkirch-Wil	41.8%	1'956
71	Wangen bei Olten	41.8%	5'539
72	Rickenbach	41.8%	1'198
73	Lostorf	41.8%	4'088
74	Niedergösgen	41.8%	4'197
75	Dulliken	41.8%	5'396
76	Olten	41.8%	18'715
77	Erlinsbach	41.8%	3'691
78	Walterswil	41.8%	749
79	Däniken	41.8%	3'041
80	Schönenwerd	41.8%	5'201
81	Obergösgen	41.8%	2'457
82	Winznau	41.8%	2'058
83	Gretzenbach	41.8%	2'800
84	Unterramsern	39%	220
85	Oberdorf	39%	1'859
86	Grenchen	39%	18'295
87	Rüttenen	39%	1'541
88	Solothurn	39%	16'855
89	Welschenrohr-Gänsbrunnen	39%	1'205
90	Lüterkofen-Ichertswil	39%	904
91	Lüsslingen-Nennigkofen	39%	1'140
92	Buchegg	39%	2'926
93	Bettlach	39%	4'978
94	Lommiswil	39%	1'630
95	Riedholz	39%	2'313
96	Schnottwil	39%	1'150
97	Biezwil	39%	354
98	Günsberg	39%	1'185
99	Balm bei Günsberg	39%	226
100	Messen	39%	1'496
101	Langendorf	39%	3'858
102	Feldbrunnen-St. Niklaus	39%	1'027
103	Selzach	39%	3'682
104	Bellach	39%	5'453

How we measure this

MeteoSchweiz

Relative sunshine duration (actual as a share of astronomically possible sunshine) from the nearest MeteoSwiss station, at most 25 km away, averaged up to 2025. The relative figure is topography-fair because it accounts for shorter winter days.

Frequently asked questions

Which municipality in canton Solothurn is the sunniest?: Gempen is the sunniest municipality in canton Solothurn, at 46.1% relative sunshine (2025).
What does relative sunshine duration mean?: The share of actual sunshine hours against the maximum possible. It makes places with short winter days fairly comparable with very sunny locations.