Chamonix weather in August

In August, Chamonix sees average daytime highs of 17°C and overnight lows near 7°C, with 157 mm of precipitation across 17.8 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 18°C in the first days to 16°C by the end. The sky is clear or mostly clear about 28% 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 Chamonix's 2nd-clearest and 12th-windiest month. For the whole year in context, see Chamonix's year-round climate.

Daytime high: 17°; 2nd warmest
Overnight low: 7°; 11th coldest
Precipitation: 157 mm; 17.8 wet days
Daylight: 14 hours; 5:38 AM – 7:36 PM
Cloud cover: 59%; 2nd clearest
Wind: 4 km/h; 12th windiest
Solar energy: 5.07 kWh/m²
Travel score: 4.7; out of 10

Chamonix is commune in Haute-Savoie, France.

Density: 91/km²; people per km²
Founded: 1091

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

← July Chamonix year-round climate September →Best places to visit in August

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 18°C in the first days to 16°C by the end.

A typical August day in Chamonix reaches about 17°C in the afternoon and slips back to 7°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 22°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	17	17	17	17	17	17	17	17	17	17	17	16	16	16	16
Avg low (°C)	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	7	7	7	7	7	7	7	7	7	7	7	7	6	6	6	6

	Avg high (°C)	Avg low (°C)
1	18	8
2	18	8
3	18	8
4	18	8
5	18	8
6	18	8
7	18	8
8	18	8
9	18	8
10	18	8
11	18	8
12	18	8
13	18	8
14	18	8
15	18	8
16	18	7
17	17	7
18	17	7
19	17	7
20	17	7
21	17	7
22	17	7
23	17	7
24	17	7
25	17	7
26	17	7
27	17	7
28	16	6
29	16	6
30	16	6
31	16	6

How August really feels in Chamonix

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

heat index over the day's high

Days feeling ≤ 0°C

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.

Chamonix 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.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	-3° / -11°	174	13.6	13.9	8.9	0.0
Feb	-1° / -10°	144	11.9	12.3	10	0.0
Mar	3° / -6°	142	13.9	13.2	11.6	0.0
Apr	7° / -3°	124	15.4	10.3	13.3	0.7
May	12° / 2°	182	20.1	5.7	14.7	2.3
Jun	16° / 6°	163	19.4	1	15.5	3.8
Jul	18° / 8°	167	19.1	0.5	15.2	4.7
Aug	17° / 7°	157	17.8	0.3	14	4.7
Sep	14° / 4°	123	15.1	2.1	12.3	3.5
Oct	10° / 0°	121	12.7	4.8	10.7	2.0
Nov	3° / -6°	146	13.7	11.5	9.3	0.1
Dec	-2° / -10°	178	14	14	8.5	0.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 53%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	46	47	46	46	46	46	46	46	46	45	45	46	46	46	48	47	48	48	49	49	48	47	48	48	48	48	48	48	48	47	47
Cloudier (%)	54	53	54	54	54	54	54	54	54	55	55	54	54	54	52	53	52	52	51	51	52	53	52	52	52	52	52	52	52	53	53

	Clearer (%)	Cloudier (%)
1	46	54
2	47	53
3	46	54
4	46	54
5	46	54
6	46	54
7	46	54
8	46	54
9	46	54
10	45	55
11	45	55
12	46	54
13	46	54
14	46	54
15	48	52
16	47	53
17	48	52
18	48	52
19	49	51
20	49	51
21	48	52
22	47	53
23	48	52
24	48	52
25	48	52
26	48	52
27	48	52
28	48	52
29	48	52
30	47	53
31	47	53

Chance of precipitation in August

Any precipitationSnow

Chamonix gets around 157 mm of rain and snow over 17.8 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 57% and peaks near 62% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	62	62	61	61	61	60	60	60	60	60	59	59	59	58	58	57	57	56	56	56	55	55	55	54	54	54	53	53	52	52	52
Snow chance (%)	0	0	0	0	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	3	3	3

	Rain chance (%)	Snow chance (%)
1	62	0
2	62	0
3	61	0
4	61	0
5	61	1
6	60	1
7	60	1
8	60	1
9	60	1
10	60	1
11	59	1
12	59	1
13	59	1
14	58	1
15	58	1
16	57	1
17	57	1
18	56	1
19	56	1
20	56	1
21	55	1
22	55	1
23	55	1
24	54	2
25	54	2
26	54	2
27	53	2
28	53	2
29	52	3
30	52	3
31	52	3

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	96	96	96	96	96	96	96	96	96	96	97	97	97	98	98	98	98	99	99	99	99	99	99	99	99	99	99	99	99	99	100
Comfortable (%)	4	4	4	4	4	4	4	4	4	4	3	3	3	2	2	2	2	1	1	1	1	1	1	1	1	1	1	1	1	1	0

	Dry (%)	Comfortable (%)
1	96	4
2	96	4
3	96	4
4	96	4
5	96	4
6	96	4
7	96	4
8	96	4
9	96	4
10	96	4
11	97	3
12	97	3
13	97	3
14	98	2
15	98	2
16	98	2
17	98	2
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	100	0

Wind in August

Winds average 4 km/h in August, the calmest month.

Across August, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	4	calm
2	4	calm
3	4	calm
4	4	calm
5	4	calm
6	4	calm
7	4	calm
8	4	calm
9	4	calm
10	4	calm
11	4	calm
12	4	calm
13	4	calm
14	4	calm
15	4	calm
16	4	calm
17	4	calm
18	4	calm
19	4	calm
20	4	calm
21	4	calm
22	4	calm
23	4	calm
24	4	calm
25	4	calm
26	4	calm
27	4	calm
28	4	calm
29	4	calm
30	4	calm
31	4	calm

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 5:19 AM to 5:57 AM, and sunset from 7:58 PM to 7:08 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	14.7	14.6	14.6	14.5	14.5	14.4	14.4	14.3	14.3	14.3	14.2	14.2	14.1	14.1	14.0	14.0	13.9	13.9	13.8	13.8	13.7	13.7	13.6	13.6	13.5	13.5	13.4	13.4	13.3	13.2	13.2
Sunrise (AM)	5:19	5:20	5:21	5:23	5:24	5:25	5:26	5:28	5:29	5:30	5:31	5:33	5:34	5:35	5:36	5:38	5:39	5:40	5:41	5:43	5:44	5:45	5:46	5:48	5:49	5:50	5:52	5:53	5:54	5:55	5:57
Sunset (PM)	7:58	7:57	7:55	7:54	7:53	7:51	7:50	7:48	7:47	7:45	7:44	7:42	7:41	7:39	7:37	7:36	7:34	7:32	7:31	7:29	7:27	7:25	7:23	7:22	7:20	7:18	7:16	7:14	7:12	7:10	7:08

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.7	5:19	7:58
2	14.6	5:20	7:57
3	14.6	5:21	7:55
4	14.5	5:23	7:54
5	14.5	5:24	7:53
6	14.4	5:25	7:51
7	14.4	5:26	7:50
8	14.3	5:28	7:48
9	14.3	5:29	7:47
10	14.3	5:30	7:45
11	14.2	5:31	7:44
12	14.2	5:33	7:42
13	14.1	5:34	7:41
14	14.1	5:35	7:39
15	14.0	5:36	7:37
16	14.0	5:38	7:36
17	13.9	5:39	7:34
18	13.9	5:40	7:32
19	13.8	5:41	7:31
20	13.8	5:43	7:29
21	13.7	5:44	7:27
22	13.7	5:45	7:25
23	13.6	5:46	7:23
24	13.6	5:48	7:22
25	13.5	5:49	7:20
26	13.5	5:50	7:18
27	13.4	5:52	7:16
28	13.4	5:53	7:14
29	13.3	5:54	7:12
30	13.2	5:55	7:10
31	13.2	5:57	7:08

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.07 kWh/m².

For context, solar energy here swings from a low near 1.37 kWh/m² to a high of 5.84 kWh/m² in June across the year — August's 5.07 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	5.5	5.4	5.4	5.4	5.3	5.3	5.3	5.3	5.2	5.2	5.2	5.2	5.2	5.2	5.1	5.1	5.1	5.1	5.0	5.0	5.0	4.9	4.9	4.9	4.8	4.8	4.7	4.7	4.7	4.6	4.6
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.5	Bright
2	5.4	Bright
3	5.4	Bright
4	5.4	Bright
5	5.3	Bright
6	5.3	Bright
7	5.3	Bright
8	5.3	Bright
9	5.2	Bright
10	5.2	Bright
11	5.2	Bright
12	5.2	Bright
13	5.2	Bright
14	5.2	Bright
15	5.1	Bright
16	5.1	Bright
17	5.1	Bright
18	5.1	Bright
19	5.0	Bright
20	5.0	Bright
21	5.0	Bright
22	4.9	Bright
23	4.9	Bright
24	4.9	Bright
25	4.8	Bright
26	4.8	Bright
27	4.7	Bright
28	4.7	Bright
29	4.7	Bright
30	4.6	Bright
31	4.6	Bright

Planning a trip in August

Is August a good time to visit Chamonix?

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

4.7

Sightseeing

1st-best month of the year

1.3

Beach & pool

2nd-best month of the year

August is a reasonable time to visit Chamonix for sightseeing.

What to pack for Chamonix in August

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

In August, Chamonix sees daytime highs around 17°C and nights near 7°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 Chamonix in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Chamonix peaks around July 13 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	3	5	5	7	9	9	8	6	4	2	1
Level	Low	Moderate	Moderate	High	Very high	Very high	Very high	Very high	High	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	3	Moderate
Mar	5	Moderate
Apr	5	High
May	7	Very high
Jun	9	Very high
Jul	9	Very high
Aug	8	Very high
Sep	6	High
Oct	4	Moderate
Nov	2	Low
Dec	1	Low

Location & terrain

Where is Chamonix?

Chamonix sits at 45.9°N, 6.9°E, 0 m above sea level, in France. The nearest listed city is Sallanches, 19 km away.

Topography around Chamonix

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

Within 3 km, the terrain around Chamonix has very significant variations in elevation — a maximum elevation change of 1,463 m around an average of 1,562 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 4,245 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,495 m.

The land around Chamonix is covered by trees (61%) and grassland (25%) within 3 km, trees (28%), grassland (26%) and snow and ice (24%) within 16 km, and trees (41%) and grassland (34%) within 80 km.

3 km

1,463 m

trees 61%

16 km

4,245 m

trees 28%

80 km

4,495 m

trees 41%

treesgrasslandcroplandartificial surfacesbare terrainsnow and icewatermoss and lichen

← July Chamonix year-round climate September →Best places to visit in August

August weather nearby: Sallanches 19 km · Martigny-Ville 25 km · Cluses 27 km · Monthey 37 km · Aosta 40 km · Albertville 46 km · Sitten 50 km · Annecy-le-Vieux 56 km

France travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / E; 230 V · 50 Hz
Prices: ≈ 77% of US; price level, 2025
GDP per capita: $48,986; 2025
Happiness: 6.6 / 10; World Happiness, 2025
Safe drinking water: 100%; of population, 2024
Homicide rate: 1.3; per 100k, 2023
Road deaths: 5.1; per 100k/yr, 2019
Income group: High; World Bank
English: Moderate; EF EPI 539
Religion

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 Chamonix (45.9237°, 6.8693°, 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).

	Avg high (°C)	Avg low (°C)
1	18	8
2	18	8
3	18	8
4	18	8
5	18	8
6	18	8
7	18	8
8	18	8
9	18	8
10	18	8
11	18	8
12	18	8
13	18	8
14	18	8
15	18	8
16	18	7
17	17	7
18	17	7
19	17	7
20	17	7
21	17	7
22	17	7
23	17	7
24	17	7
25	17	7
26	17	7
27	17	7
28	16	6
29	16	6
30	16	6
31	16	6

	Clearer (%)	Cloudier (%)
1	46	54
2	47	53
3	46	54
4	46	54
5	46	54
6	46	54
7	46	54
8	46	54
9	46	54
10	45	55
11	45	55
12	46	54
13	46	54
14	46	54
15	48	52
16	47	53
17	48	52
18	48	52
19	49	51
20	49	51
21	48	52
22	47	53
23	48	52
24	48	52
25	48	52
26	48	52
27	48	52
28	48	52
29	48	52
30	47	53
31	47	53

	Rain chance (%)	Snow chance (%)
1	62	0
2	62	0
3	61	0
4	61	0
5	61	1
6	60	1
7	60	1
8	60	1
9	60	1
10	60	1
11	59	1
12	59	1
13	59	1
14	58	1
15	58	1
16	57	1
17	57	1
18	56	1
19	56	1
20	56	1
21	55	1
22	55	1
23	55	1
24	54	2
25	54	2
26	54	2
27	53	2
28	53	2
29	52	3
30	52	3
31	52	3

	Dry (%)	Comfortable (%)
1	96	4
2	96	4
3	96	4
4	96	4
5	96	4
6	96	4
7	96	4
8	96	4
9	96	4
10	96	4
11	97	3
12	97	3
13	97	3
14	98	2
15	98	2
16	98	2
17	98	2
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	100	0

	Avg high (°C)	Avg low (°C)
1	18	8
2	18	8
3	18	8
4	18	8
5	18	8
6	18	8
7	18	8
8	18	8
9	18	8
10	18	8
11	18	8
12	18	8
13	18	8
14	18	8
15	18	8
16	18	7
17	17	7
18	17	7
19	17	7
20	17	7
21	17	7
22	17	7
23	17	7
24	17	7
25	17	7
26	17	7
27	17	7
28	16	6
29	16	6
30	16	6
31	16	6

	Clearer (%)	Cloudier (%)
1	46	54
2	47	53
3	46	54
4	46	54
5	46	54
6	46	54
7	46	54
8	46	54
9	46	54
10	45	55
11	45	55
12	46	54
13	46	54
14	46	54
15	48	52
16	47	53
17	48	52
18	48	52
19	49	51
20	49	51
21	48	52
22	47	53
23	48	52
24	48	52
25	48	52
26	48	52
27	48	52
28	48	52
29	48	52
30	47	53
31	47	53

	Rain chance (%)	Snow chance (%)
1	62	0
2	62	0
3	61	0
4	61	0
5	61	1
6	60	1
7	60	1
8	60	1
9	60	1
10	60	1
11	59	1
12	59	1
13	59	1
14	58	1
15	58	1
16	57	1
17	57	1
18	56	1
19	56	1
20	56	1
21	55	1
22	55	1
23	55	1
24	54	2
25	54	2
26	54	2
27	53	2
28	53	2
29	52	3
30	52	3
31	52	3

	Dry (%)	Comfortable (%)
1	96	4
2	96	4
3	96	4
4	96	4
5	96	4
6	96	4
7	96	4
8	96	4
9	96	4
10	96	4
11	97	3
12	97	3
13	97	3
14	98	2
15	98	2
16	98	2
17	98	2
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	100	0

	Avg high (°C)	Avg low (°C)
1	18	8
2	18	8
3	18	8
4	18	8
5	18	8
6	18	8
7	18	8
8	18	8
9	18	8
10	18	8
11	18	8
12	18	8
13	18	8
14	18	8
15	18	8
16	18	7
17	17	7
18	17	7
19	17	7
20	17	7
21	17	7
22	17	7
23	17	7
24	17	7
25	17	7
26	17	7
27	17	7
28	16	6
29	16	6
30	16	6
31	16	6

	Clearer (%)	Cloudier (%)
1	46	54
2	47	53
3	46	54
4	46	54
5	46	54
6	46	54
7	46	54
8	46	54
9	46	54
10	45	55
11	45	55
12	46	54
13	46	54
14	46	54
15	48	52
16	47	53
17	48	52
18	48	52
19	49	51
20	49	51
21	48	52
22	47	53
23	48	52
24	48	52
25	48	52
26	48	52
27	48	52
28	48	52
29	48	52
30	47	53
31	47	53

	Rain chance (%)	Snow chance (%)
1	62	0
2	62	0
3	61	0
4	61	0
5	61	1
6	60	1
7	60	1
8	60	1
9	60	1
10	60	1
11	59	1
12	59	1
13	59	1
14	58	1
15	58	1
16	57	1
17	57	1
18	56	1
19	56	1
20	56	1
21	55	1
22	55	1
23	55	1
24	54	2
25	54	2
26	54	2
27	53	2
28	53	2
29	52	3
30	52	3
31	52	3

	Dry (%)	Comfortable (%)
1	96	4
2	96	4
3	96	4
4	96	4
5	96	4
6	96	4
7	96	4
8	96	4
9	96	4
10	96	4
11	97	3
12	97	3
13	97	3
14	98	2
15	98	2
16	98	2
17	98	2
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	100	0