Which municipality in canton Aargau is the sunniest?

Kaiseraugst is the sunniest municipality in canton Aargau, at 42.1% relative sunshine (1991–2020).

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.

← Canton Aargau overview

Ranking · Data 1991–2020 · Source: BFS

The sunniest municipalities in canton Aargau (1991–2020)

National ranking →

Kaiseraugst is the sunniest municipality in canton Aargau: 42.1% of possible sunshine duration (1991–2020 normals). Next come Rheinfelden (41.6%) and Olsberg (41.5%). Source: MeteoSwiss 1 km climate-normals grid.

Ranking

MeteoSchweiz · 1991–2020

Rank	Municipality	Sunshine	Residents
1	Kaiseraugst	42.1%	5'985
2	Rheinfelden	41.6%	14'034
3	Olsberg	41.5%	366
4	Merenschwand	41.4%	3'945
5	Mühlau	41.4%	1'368
6	Magden	41.4%	3'903
7	Möhlin	41.4%	11'351
8	Auw	41.2%	2'325
9	Beinwil (Freiamt)	41.2%	1'318
10	Muri	41.2%	8'850
11	Wallbach	41.2%	2'084
12	Aristau	41.1%	1'655
13	Besenbüren	41.1%	677
14	Geltwil	41.1%	242
15	Oberrüti	41.1%	1'631
16	Rottenschwil	41.1%	1'013
17	Bremgarten	41%	8'902
18	Jonen	41%	2'333
19	Boswil	41%	3'209
20	Buttwil	41%	1'305
21	Sins	41%	4'561
22	Bünzen	40.9%	1'247
23	Zeiningen	40.9%	2'604
24	Oberlunkhofen	40.8%	2'196
25	Unterlunkhofen	40.8%	1'662
26	Zufikon	40.8%	4'960
27	Beinwil am See	40.8%	3'711
28	Abtwil	40.8%	1'107
29	Dietwil	40.8%	1'476
30	Menziken	40.7%	8'909
31	Reinach	40.7%	9'858
32	Brittnau	40.7%	4'350
33	Boniswil	40.6%	1'795
34	Waltenschwil	40.6%	3'291
35	Mumpf	40.6%	1'565
36	Strengelbach	40.6%	5'080
37	Birrwil	40.5%	1'416
38	Leimbach	40.5%	529
39	Kallern	40.5%	419
40	Stein	40.5%	3'660
41	Zuzgen	40.5%	918
42	Reitnau	40.5%	1'663
43	Birmenstorf	40.4%	3'053
44	Arni	40.4%	1'953
45	Eggenwil	40.4%	1'063
46	Oberwil-Lieli	40.4%	2'699
47	Islisberg	40.4%	682
48	Sisseln	40.4%	1'653
49	Wittnau	40.4%	1'449
50	Hallwil	40.4%	1'040
51	Bettwil	40.4%	736
52	Moosleerau	40.4%	945
53	Vordemwald	40.4%	2'026
54	Berikon	40.3%	5'026
55	Fischbach-Göslikon	40.3%	1'887
56	Rudolfstetten-Friedlisberg	40.3%	4'667
57	Uezwil	40.3%	553
58	Widen	40.3%	3'909
59	Birrhard	40.3%	993
60	Mülligen	40.3%	1'124
61	Gontenschwil	40.3%	2'249
62	Leutwil	40.3%	763
63	Gipf-Oberfrick	40.3%	3'886
64	Hellikon	40.3%	837
65	Kirchleerau	40.3%	950
66	Rothrist	40.3%	9'979
67	Staffelbach	40.3%	1'398
68	Biberstein	40.2%	1'653
69	Küttigen	40.2%	7'025
70	Oberentfelden	40.2%	9'061
71	Bergdietikon	40.2%	2'993
72	Mellingen	40.2%	6'324
73	Spreitenbach	40.2%	13'377
74	Wohlenschwil	40.2%	1'876
75	Würenlos	40.2%	7'046
76	Niederwil	40.2%	3'030
77	Tägerig	40.2%	1'528
78	Villmergen	40.2%	8'290
79	Birr	40.2%	4'868
80	Brugg	40.2%	13'615
81	Habsburg	40.2%	430
82	Hausen	40.2%	3'850
83	Lupfig	40.2%	3'484
84	Veltheim	40.2%	1'598
85	Windisch	40.2%	8'286
86	Schinznach	40.2%	2'461
87	Holziken	40.2%	1'768
88	Schlossrued	40.2%	878
89	Unterkulm	40.2%	3'807
90	Zetzwil	40.2%	1'402
91	Frick	40.2%	6'211
92	Münchwilen	40.2%	1'091
93	Herznach-Ueken	40.2%	2'765
94	Brunegg	40.2%	971
95	Egliswil	40.2%	1'627
96	Hendschiken	40.2%	1'399
97	Meisterschwanden	40.2%	3'330
98	Othmarsingen	40.2%	3'301
99	Seon	40.2%	5'716
100	Oftringen	40.2%	15'198
101	Mellikon	40.2%	227
102	Siglistorf	40.2%	871
103	Aarau	40.1%	22'932
104	Erlinsbach	40.1%	4'650
105	Hirschthal	40.1%	1'772
106	Unterentfelden	40.1%	4'579
107	Baden	40.1%	24'012
108	Gebenstorf	40.1%	5'840
109	Killwangen	40.1%	2'272
110	Mägenwil	40.1%	2'305
111	Neuenhof	40.1%	9'306
112	Wettingen	40.1%	22'027
113	Büttikon	40.1%	1'155
114	Auenstein	40.1%	1'747
115	Oberkulm	40.1%	3'026
116	Schmiedrued	40.1%	1'145
117	Schöftland	40.1%	4'658
118	Eiken	40.1%	2'573
119	Oeschgen	40.1%	1'181
120	Böztal	40.1%	2'985
121	Dintikon	40.1%	2'405
122	Fahrwangen	40.1%	2'587
123	Möriken-Wildegg	40.1%	5'025
124	Niederlenz	40.1%	4'998
125	Rupperswil	40.1%	6'317
126	Seengen	40.1%	4'516
127	Obermumpf	40.1%	1'090
128	Aarburg	40.1%	9'040
129	Murgenthal	40.1%	3'188
130	Fisibach	40.1%	595
131	Buchs	40%	8'651
132	Gränichen	40%	8'699
133	Muhen	40%	4'099
134	Suhr	40%	11'760
135	Ennetbaden	40%	3'801
136	Freienwil	40%	1'117
137	Obersiggenthal	40%	9'020
138	Stetten	40%	2'540
139	Ehrendingen	40%	4'919
140	Dottikon	40%	4'240
141	Sarmenstorf	40%	3'194
142	Wohlen	40%	18'162
143	Riniken	40%	1'594
144	Ammerswil	40%	801
145	Holderbank	40%	1'610
146	Lenzburg	40%	11'322
147	Staufen	40%	4'411
148	Bottenwil	40%	862
149	Kölliken	40%	5'133
150	Uerkheim	40%	1'442
151	Wiliberg	40%	175
152	Schneisingen	40%	1'551
153	Zurzach	40%	8'346
154	Fislisbach	39.9%	6'134
155	Hägglingen	39.9%	2'707
156	Oberhof	39.9%	595
157	Wölflinswil	39.9%	1'105
158	Zeihen	39.9%	1'268
159	Schafisheim	39.9%	3'131
160	Schupfart	39.9%	922
161	Zofingen	39.9%	13'054
162	Lengnau	39.9%	2'944
163	Rüfenach	39.8%	869
164	Bözberg	39.8%	1'696
165	Teufenthal	39.8%	1'772
166	Hunzenschwil	39.8%	4'472
167	Wegenstetten	39.8%	1'008
168	Niederrohrdorf	39.7%	4'751
169	Remetschwil	39.7%	2'102
170	Untersiggenthal	39.7%	7'875
171	Thalheim	39.7%	984
172	Dürrenäsch	39.7%	1'393
173	Safenwil	39.7%	4'629
174	Endingen	39.7%	2'758
175	Bellikon	39.6%	1'587
176	Künten	39.6%	1'978
177	Oberrohrdorf	39.6%	4'265
178	Villigen	39.6%	2'257
179	Kaisten	39.6%	3'063
180	Laufenburg	39.6%	3'882
181	Full-Reuenthal	39.6%	1'021
182	Tegerfelden	39.6%	1'326
183	Densbüren	39.5%	784
184	Mönthal	39.5%	391
185	Remigen	39.5%	1'380
186	Würenlingen	39.4%	5'323
187	Schwaderloch	39.4%	727
188	Mettauertal	39.4%	2'156
189	Böttstein	39.4%	4'428
190	Gansingen	39.3%	1'125
191	Koblenz AG	39.3%	1'835
192	Leibstadt	39.3%	1'639
193	Leuggern	39.3%	2'442
194	Döttingen	39.2%	4'525
195	Klingnau	39.2%	3'710
196	Mandach	39%	328

1991–2020 · MeteoSwiss, retrieved 28.08.2026

How we measure this

MeteoSchweiz

Relative sunshine duration (actual as a share of astronomically possible sunshine) from the MeteoSwiss 1 km gridded climate normals — a spatial analysis of the 1991–2020 normals period — read at the municipality's main settlement. The relative figure is topography-fair because it accounts for shorter winter days.

Frequently asked questions

Which municipality in canton Aargau is the sunniest?: Kaiseraugst is the sunniest municipality in canton Aargau, at 42.1% relative sunshine (1991–2020).
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.