St. Moritz weather in August

In August, St. Moritz sees average daytime highs of 14°C and overnight lows near 5°C, with 161 mm of precipitation across 18.2 wet days and about 14 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 15°C in the first days to 13°C by the end. The sky is clear or mostly clear about 19% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 42 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is St. Moritz's 5th-clearest and 11th-windiest month. For the whole year in context, see St. Moritz's year-round climate.

Daytime high
14°
2nd warmest
Overnight low
11th coldest
Precipitation
161 mm
18.2 wet days
Daylight
14 hours
5:24 AM – 7:25 PM
Cloud cover
64%
5th clearest
Wind
5 km/h
11th windiest
Solar energy
4.93 kWh/m²
Travel score
3.3
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 15°C in the first days to 13°C by the end.

A typical August day in St. Moritz reaches about 14°C in the afternoon and slips back to 5°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 18°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

-5°10°15°20°151015202531
Avg high (°C)Avg low (°C)
1156
2156
3156
4156
5156
6155
7155
8145
9145
10145
11145
12145
13145
14145
15145
16145
17145
18145
19145
20145
21145
22145
23145
24134
25134
26134
27134
28134
29134
30134
31123

How August really feels in St. Moritz

Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 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
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

St. Moritz weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-7° / -15°751112.68.80.0
Feb-5° / -14°6110.411.6100.0
Mar-1° / -10°741213.711.60.0
Apr / -5°10614.714.113.30.0
May / -1°13318.510.614.80.7
Jun12° / 15619.13.715.52.6
Jul14° / 15819.41.215.23.4
Aug14° / 16118.21.4143.3
Sep10° / 10813.44.112.42.0
Oct / -2°11911.98.110.70.4
Nov-1° / -8°14313.714.19.20.0
Dec-6° / -13°8312.213.48.40.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 22% of August, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24060
33961
44060
54060
63961
73961
83961
93961
103862
113862
123763
133862
143862
153862
163862
173862
183961
194060
204159
214159
224159
234258
244357
254357
264357
274357
284357
294456
304357
314357

Chance of precipitation in August

Any precipitationSnow

St. Moritz gets around 161 mm of rain and snow over 18.2 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 58% and peaks near 61% on the wettest days, and about 1 day brings snow. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1613
2613
3603
4603
5604
6604
7614
8614
9614
10614
11614
12614
13603
14603
15603
16603
17593
18593
19583
20583
21574
22574
23575
24565
25566
26557
27557
28548
29549
305310
315310

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August 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 August

Winds average 5 km/h in August.

Across August, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 42 min at the start of August to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over August. Sunrise moves from 5:05 AM to 5:44 AM, and sunset from 7:48 PM to 6:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.75:057:48
214.75:077:47
314.65:087:45
414.65:097:44
514.55:107:42
614.55:127:41
714.45:137:39
814.45:147:38
914.35:157:36
1014.35:177:35
1114.35:187:33
1214.25:197:32
1314.25:217:30
1414.15:227:28
1514.15:237:27
1614.05:247:25
1714.05:267:23
1813.95:277:22
1913.95:287:20
2013.85:307:18
2113.85:317:16
2213.75:327:14
2313.65:347:13
2413.65:357:11
2513.55:367:09
2613.55:387:07
2713.45:397:05
2813.45:407:03
2913.35:417:01
3013.35:436:59
3113.25:446:57

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.93 kWh/m².

For context, solar energy here swings from a low near 1.49 kWh/m² to a high of 5.98 kWh/m² in May across the year — August's 4.93 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.3Bright
45.3Bright
55.3Bright
65.2Bright
75.2Bright
85.2Bright
95.1Bright
105.1Bright
115.1Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.8Bright
214.8Bright
224.8Bright
234.7Bright
244.7Bright
254.7Bright
264.6Bright
274.6Bright
284.6Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in August

Is August a good time to visit St. Moritz?

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

3.3
Sightseeing
2nd-best month of the year
Beach & pool
never really warm enough

August is a weaker month for outdoor sightseeing in St. Moritz.

What to pack for St. Moritz in August

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

In August, St. Moritz sees daytime highs around 14°C and nights near 5°C. Pack rain gear. Worth having: a warm layer and sun protection. About 18 days see rain.

rain geara warm layersun protection

UV index in St. Moritz in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in St. Moritz peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 9Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar6High
Apr8Very high
May9Very high
Jun9Very high
Jul10Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is St. Moritz?

St. Moritz sits at 46.5°N, 9.8°E, 0 m above sea level, in Switzerland. The nearest listed city is Davos, 34 km away.

DavosSondrioChurBellinzonaBludenzVaduzLeccoFeldkirch

Topography around St. Moritz

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

Within 3 km, the terrain around St. Moritz has large variations in elevation — a maximum elevation change of 1,149 m around an average of 2,048 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,603 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,753 m.

The land around St. Moritz is covered by trees (43%) and grassland (43%) within 3 km, grassland (37%) and bare terrain (21%) within 16 km, and trees (43%) and grassland (35%) within 80 km.

3 km
1,149 m
16 km
2,603 m
80 km
3,753 m
treesgrasslandartificial surfacesbare terrainsnow and icewatermoss and lichen
August weather nearby: Davos 34 km · Sondrio 37 km · Chur 46 km · Bellinzona 72 km · Bludenz 73 km · Vaduz 75 km · Lecco 79 km · Feldkirch 84 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 St. Moritz (46.4994°, 9.8433°, elevation 0 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).