Fog report Mon, 12/15

Name: Fog report Mon, 12/15/2025: sunshine at the SwissMetNet stations
Creator: MeteoSwiss
License: https://creativecommons.org/licenses/by/4.0/

Fog lid at 800–1,400 m, sun above it.

Most sun: Chasseral with 7 h 35 min. On the Swiss Plateau 32 of 44 weather stations saw not a single minute of sun.

Measured on Monday, December 15, 2025 · Source: MeteoSwiss, SwissMetNet stations

Station up to 1,400 mStation above 1,400 mFog lid, measured

Sun staircase · 12/15/2025 · measured

Sun by altitude at 73 weather stations

Each dot is a MeteoSwiss station: up, how high it lies; right, how long it measured sun on Mon, 12/15.

Stations without a minute of sun: 35

Salen-Reutenen719 m0 min
Bière684 m0 min
Fribourg / Grangeneuve651 m0 min
Zürich / Fluntern604 m0 min
Bern / Zollikofen553 m0 min
Aadorf / Tänikon539 m0 min

Longest in the sun

Chasseral1,594 m7 h 35 min
Fahy596 m7 h 8 min
La Chaux-de-Fonds1,017 m7 h
Chaumont1,136 m6 h 56 min

Above the fog lid: summits from 1,500 m

All measurements of Mon, 12/15

Minutes of sun per hour at 73 MeteoSwiss weather stations, sorted by height. Each cell is an hour; the dashed line is the measured fog boundary.

Station · hour ending	9	10	11	12	13	14	15	16	17	Total
Jungfraujoch3,571 m	32 min	60 min	60 min	60 min	59 min	11 min	4 min	0 min	0 min	4 h 46 min
Titlis3,045 m	45 min	60 min	60 min	60 min	60 min	45 min	14 min	0 min	0 min	5 h 44 min
Säntis2,501 m	52 min	59 min	60 min	60 min	9 min	47 min	17 min	0 min	0 min	5 h 4 min
Gütsch, Andermatt2,286 m	3 min	60 min	60 min	60 min	60 min	39 min	0 min	0 min	0 min	4 h 42 min
Pilatus2,105 m	37 min	60 min	60 min	60 min	60 min	47 min	1 min	0 min	0 min	5 h 25 min
Le Moléson1,974 m	26 min	60 min	60 min	52 min	60 min	57 min	50 min	31 min	0 min	6 h 36 min
La Dôle1,670 m	14 min	60 min	60 min	60 min	56 min	36 min	44 min	19 min	0 min	5 h 49 min
Chasseral1,594 m	38 min	60 min	60 min	60 min	60 min	60 min	58 min	55 min	4 min	7 h 35 min
Napf1,404 m	35 min	60 min	60 min	60 min	60 min	46 min	0 min	0 min	0 min	5 h 21 min
Adelboden1,321 m	0 min	0 min	37 min	60 min	48 min	0 min	0 min	0 min	0 min	2 h 25 min
Bullet / La Frétaz1,205 m	24 min	60 min	60 min	60 min	60 min	60 min	60 min	25 min	0 min	6 h 49 min
Chaumont1,136 m	28 min	60 min	60 min	60 min	60 min	60 min	52 min	36 min	0 min	6 h 56 min
Hörnli1,133 m	11 min	60 min	60 min	59 min	45 min	60 min	26 min	0 min	0 min	5 h 21 min
La Brévine1,050 m	0 min	59 min	60 min	60 min	60 min	54 min	57 min	33 min	0 min	6 h 23 min
Plaffeien1,042 m	12 min	60 min	60 min	60 min	42 min	53 min	38 min	7 min	0 min	5 h 32 min
Engelberg1,036 m	0 min	0 min	0 min	2 min	60 min	40 min	11 min	0 min	0 min	1 h 53 min
Château-d'Oex1,028 m	0 min	18 min	60 min	58 min	40 min	55 min	29 min	0 min	0 min	4 h 20 min
La Chaux-de-Fonds1,017 m	10 min	60 min	60 min	60 min	60 min	60 min	58 min	52 min	0 min	7 h
Bantiger942 m	33 min	60 min	60 min	60 min	42 min	10 min	17 min	4 min	0 min	4 h 46 min
Einsiedeln911 m	7 min	60 min	60 min	60 min	60 min	60 min	8 min	0 min	0 min	5 h 15 min
Uetliberg854 m	41 min	60 min	60 min	60 min	60 min	60 min	16 min	0 min	0 min	5 h 57 min
Lägern845 m	8 min	37 min	55 min	60 min	60 min	60 min	39 min	0 min	0 min	5 h 19 min
Oron828 m	0 min	27 min	10 min	2 min	41 min	5 min	4 min	19 min	0 min	1 h 48 min
St. Gallen776 m	0 min	36 min	60 min	57 min	0 min	6 min	0 min	0 min	0 min	2 h 39 min
Frutigen756 m	0 min	0 min	43 min	60 min	55 min	0 min	0 min	0 min	0 min	2 h 38 min
Langnau i.E.744 m	15 min	60 min	60 min	60 min	60 min	30 min	1 min	0 min	0 min	4 h 46 min
Salen-Reutenen719 m	0 min	0 min	0 min	0 min	0 min	0 min	0 min	0 min	0 min	0 min
Bière684 m	0 min	0 min	0 min	0 min	0 min	0 min	0 min	0 min	0 min	0 min
Fribourg / Grangeneuve651 m	0 min	0 min	0 min	0 min	0 min	0 min	0 min	0 min	0 min	0 min
Ebnat-Kappel623 m	17 min	60 min	60 min	60 min	23 min	49 min	5 min	0 min	0 min	4 h 34 min
Rünenberg611 m	0 min	28 min	50 min	60 min	60 min	57 min	16 min	15 min	0 min	4 h 46 min
Zürich / Fluntern604 m	0 min	0 min	0 min	0 min	0 min	0 min	0 min	0 min	0 min	0 min

no sun1–19 min20–44 min45–60 minMeasured fog boundaryMeasurements: MeteoSwiss, SwissMetNet

For the press

Chart and measurements are free to use with a link to this page (CC BY 4.0). Source of the measurements: MeteoSwiss, SwissMetNet stations.

Measurements as CSV

More sea-of-fog days

The days the MeteoSwiss network measured a sea of fog in at least half of the hours with the sun high – each with all its measurements.

Fog level and sea of fog today

Source: MeteoSwiss