Which municipality in canton Solothurn is the sunniest?

Bättwil 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 →

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

Ranking

MeteoSchweiz · 2025

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