Lancy weather in August

In August, Lancy sees average daytime highs of 23°C and overnight lows near 13°C, with 129 mm of rain across 13.2 wet days and about 14 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 22°C by the end. The sky is clear or mostly clear about 36% of the time in August, and the air most often feels comfortable.

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 Lancy's 2nd-clearest and 12th-windiest month. For the whole year in context, see Lancy's year-round climate.

Daytime high
23°
2nd warmest
Overnight low
13°
11th coldest
Rainfall
129 mm
13.2 wet days
Daylight
14 hours
5:40 AM – 7:39 PM
Cloud cover
52%
2nd clearest
Wind
6 km/h
12th windiest
Solar energy
5.19 kWh/m²
Travel score
6.6
out of 10

Lancy is Switzerland.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 22°C by the end.

A typical August day in Lancy reaches about 23°C in the afternoon and slips back to 13°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 28°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12414
22414
32414
42414
52414
62414
72414
82414
92414
102414
112414
122414
132314
142314
152314
162314
172314
182313
192313
202313
212313
222313
232313
242313
252213
262213
272213
282212
292212
302112
312112

How August really feels in Lancy

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.

Lancy weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°12612.87.38.80.0
Feb / -1°10711.26.6100.4
Mar10° / 11912.54.411.62.4
Apr14° / 11513.42.213.33.7
May18° / 14215.90.314.74.9
Jun21° / 12°13014.4015.55.9
Jul24° / 14°13113.5015.26.6
Aug23° / 13°12913.20146.6
Sep19° / 10°12112012.35.7
Oct14° / 12812.90.510.73.9
Nov / 13613.23.69.21.4
Dec / -1°14713.56.88.50.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35743
45743
55644
65644
75545
85545
95545
105545
115545
125545
135545
145545
155644
165743
175743
185743
195743
205842
215842
225842
235743
245743
255743
265644
275644
285644
295446
305446
315446

Chance of precipitation in August

Any precipitation

Lancy gets around 129 mm of rain over 13.2 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 41% and peaks near 44% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
143
243
343
444
544
644
744
844
944
1043
1143
1243
1343
1442
1542
1642
1741
1841
1941
2041
2140
2240
2340
2440
2540
2639
2739
2839
2938
3038
3138

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 40% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12943281
22943281
32942281
43042281
53041281
63141281
73240271
83340261
93440261
103440251
113540241
123541231
133641230
143641220
153742210
163742210
173742200
183742200
193842200
203842200
213942190
224041190
234140180
244240180
254439170
264537170
274736160
284935150
295134150
305333140
315433130

Wind in August

Winds average 6 km/h in August, the calmest month.

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

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

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 5:21 AM to 5:59 AM, and sunset from 8:02 PM to 7:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.75:218:02
214.65:228:01
314.65:247:59
414.55:257:58
514.55:267:56
614.55:277:55
714.45:297:54
814.45:307:52
914.35:317:51
1014.35:327:49
1114.25:347:47
1214.25:357:46
1314.15:367:44
1414.15:377:43
1514.05:397:41
1614.05:407:39
1713.95:417:38
1813.95:437:36
1913.85:447:34
2013.85:457:32
2113.75:467:31
2213.75:487:29
2313.65:497:27
2413.65:507:25
2513.55:527:23
2613.55:537:21
2713.45:547:19
2813.45:567:18
2913.35:577:16
3013.35:587:14
3113.25:597:12

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.19 kWh/m².

For context, solar energy here swings from a low near 1.12 kWh/m² to a high of 5.93 kWh/m² in July across the year — August's 5.19 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.6Bright
55.5Bright
65.5Bright
75.5Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
244.9Bright
254.9Bright
264.8Bright
274.8Bright
284.7Bright
294.7Bright
304.6Bright
314.6Bright
Planning a trip in August

Is August a good time to visit Lancy?

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

6.6
Sightseeing
1st-best month of the year
5.0
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Lancy for sightseeing.

What to pack for Lancy in August

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

In August, Lancy sees daytime highs around 23°C and nights near 13°C. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Lancy in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Lancy peaks around July 15 at about 8 (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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5Moderate
May7High
Jun7Very high
Jul9Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Lancy in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Lancy is worst in April — around 15 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1015 µg/m³Nov 1210 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb12Moderate
Mar15Moderate
Apr15Moderate
May13Moderate
Jun15Moderate
Jul11Good
Aug11Good
Sep11Good
Oct10Good
Nov10Good
Dec11Good
Location & terrain

Where is Lancy?

Lancy sits at 46.2°N, 6.1°E, 421 m above sea level, in Switzerland. The nearest listed city is Onex, 1.0 km away.

NyonAnnecy-le-Vieux

Topography around Lancy

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

Within 3 km, the terrain around Lancy has only modest variations in elevation — a maximum elevation change of 86 m around an average of 406 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,383 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,606 m.

The land around Lancy is covered by artificial surfaces (47%) and trees (37%) within 3 km, trees (43%) and grassland (23%) within 16 km, and trees (53%) and grassland (29%) within 80 km.

3 km
86 m
16 km
1,383 m
80 km
4,606 m
treesgrasslandcroplandartificial surfacesbare terrainsnow and icewater
August weather nearby: Onex 1.0 km · Carouge 2.0 km · Geneva 3.0 km · Vernier 4.0 km · Meyrin 6.0 km · Annemasse 10 km · Nyon 24 km · Annecy-le-Vieux 30 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 Lancy (46.1898°, 6.1144°, elevation 421 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).