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 Bättwil (46.1%). Source: MeteoSwiss, nearest station.

Ranking

MeteoSchweiz · 2025

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