Herisau weather in January

In January, Herisau sees average daytime highs of 3°C and overnight lows near -2°C, with 88 mm of precipitation across 12.7 wet days and about 8.7 hours of daylight. It is the 12th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 3°C through the month. The sky is clear or mostly clear about 22% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 18 min at the start of January to 9 h 12 min by month's end. Set against the rest of the year, January is Herisau's 9th-clearest and 6th-windiest month. For the whole year in context, see Herisau's year-round climate.

Daytime high
12th warmest
Overnight low
-2°
1st coldest
Precipitation
88 mm
12.7 wet days
Daylight
8 h 42 min
8:12 AM – 4:52 PM
Cloud cover
67%
9th clearest
Wind
7 km/h
6th windiest
Solar energy
1.31 kWh/m²
Travel score
0.0
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 3°C through the month.

A typical January day in Herisau reaches about 3°C in the afternoon and slips back to -2°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between -2°C and 9°C. Set against its neighbours, January runs on par with December and about 1°C cooler than February.

-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
13-2
23-2
33-2
43-2
53-2
63-2
73-2
83-2
93-2
103-2
113-2
123-2
133-2
143-2
153-2
163-2
173-2
183-2
193-2
203-2
213-2
223-2
233-2
243-2
253-2
263-2
273-2
283-2
293-2
303-2
313-2

How January really feels in Herisau

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 31 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
31
wind chill below the day's low

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Herisau weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°8812.78.48.70.0
Feb / -2°8011.78.39.90.1
Mar / 10014.86.611.61.6
Apr13° / 10314.53.313.33.2
May17° / 10°15517.20.314.94.6
Jun21° / 13°17217.4015.75.3
Jul23° / 15°17417.5015.35.7
Aug22° / 15°17516.8014.15.8
Sep18° / 11°12713.7012.45.2
Oct13° / 10312.90.910.63.4
Nov / 10312.74.89.11.0
Dec / -1°10514.18.68.30.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 13% of January, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23664
33664
43664
53565
63664
73565
83664
93664
103664
113664
123664
133664
143664
153664
163565
173664
183664
193664
203565
213466
223565
233565
243367
253367
263367
273367
283466
293367
303367
313466

Chance of precipitation in January

Any precipitationSnow

Herisau gets around 88 mm of rain and snow over 12.7 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 41% and peaks near 45% on the wettest days, and about 8 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
14527
24526
34426
44425
54425
64325
74324
84224
94124
104124
114125
124025
134026
144027
154027
164028
174028
183929
193929
203930
213930
224030
234030
244030
254030
263930
273930
283930
293930
303930
313930

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in January

Winds average 7 km/h in January.

Across January, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 18 min at the start of January to 9 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over January. Sunrise moves from 8:16 AM to 7:59 AM, and sunset from 4:36 PM to 5:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.38:164:36
28.38:174:36
38.38:174:37
48.48:164:38
58.48:164:39
68.48:164:40
78.48:164:41
88.48:164:42
98.58:164:43
108.58:154:45
118.58:154:46
128.58:144:47
138.68:144:48
148.68:144:49
158.68:134:51
168.78:124:52
178.78:124:53
188.78:114:54
198.88:114:56
208.88:104:57
218.88:094:59
228.98:085:00
238.98:075:01
248.98:075:03
259.08:065:04
269.08:055:06
279.18:045:07
289.18:035:09
299.18:025:10
309.28:015:11
319.27:595:13

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.31 kWh/m².

For context, solar energy here swings from a low near 1.04 kWh/m² to a high of 5.52 kWh/m² in June across the year — January's 1.31 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.1Dim
21.1Dim
31.1Dim
41.1Dim
51.1Dim
61.1Dim
71.1Dim
81.2Dim
91.2Dim
101.2Dim
111.2Dim
121.2Dim
131.3Dim
141.3Dim
151.3Dim
161.3Dim
171.3Dim
181.4Dim
191.4Dim
201.4Dim
211.4Dim
221.4Dim
231.5Dim
241.5Dim
251.5Dim
261.5Dim
271.6Dim
281.6Dim
291.6Dim
301.6Dim
311.7Dim
Planning a trip in January

Is January a good time to visit Herisau?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

0.0
Sightseeing
11th-best month of the year
0.0
Beach & pool
8th-best month of the year

January is a weaker month for outdoor sightseeing in Herisau.

What to pack for Herisau in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Herisau sees daytime highs around 3°C and nights near -2°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 13 days see rain.

a warm layera heavy coatrain gear

UV index in Herisau in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Herisau peaks around July 16 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highModerateLowJul 16UV 8Jan 10UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May7Very high
Jun7Very high
Jul8Very high
Aug7High
Sep4Moderate
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Herisau?

Herisau sits at 47.4°N, 9.3°E, 780 m above sea level, in Switzerland. The nearest listed city is Gossau, 4.0 km away.

WilLustenauFeldkirchKreuzlingenHohenemsKonstanz

Topography around Herisau

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Herisau.

Within 3 km, the terrain around Herisau has significant variations in elevation — a maximum elevation change of 363 m around an average of 781 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,025 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,252 m.

The land around Herisau is covered by grassland (51%) and trees (35%) within 3 km, grassland (53%) and trees (40%) within 16 km, and trees (42%) and grassland (37%) within 80 km.

3 km
363 m
16 km
2,025 m
80 km
3,252 m
treesgrasslandcroplandartificial surfacesbare terrainsnow and icewatermoss and lichen
January weather nearby: Gossau 4.0 km · Saint Gallen 8.0 km · Wil 19 km · Lustenau 29 km · Feldkirch 29 km · Kreuzlingen 30 km · Hohenems 31 km · Konstanz 31 km

Switzerland travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / J
230 V · 50 Hz
Prices
≈ 112% of US
price level, 2025
GDP per capita
$114,769
2025
Happiness
7.0 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
0.6
per 100k, 2023
Road deaths
2.2
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 564
Religion
Roman Catholic 34%none 29%Protestant 23%other Christian 6%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Herisau (47.3862°, 9.2792°, elevation 780 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).