Voiron weather in August

In August, Voiron sees average daytime highs of 25°C and overnight lows near 14°C, with 94 mm of rain across 10.7 wet days and about 13.9 hours of daylight. It is the 2nd-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 43% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 14 h 36 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Voiron's 2nd-clearest and 7th-windiest month. For the whole year in context, see Voiron's year-round climate.

Daytime high
25°
2nd warmest
Overnight low
14°
11th coldest
Rainfall
94 mm
10.7 wet days
Daylight
13 h 54 min
5:44 AM – 7:40 PM
Cloud cover
47%
2nd clearest
Wind
6 km/h
7th windiest
Solar energy
5.43 kWh/m²
Travel score
7.0
out of 10
Air quality
Excellent
PM10 15 µg/m³ · 2019

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 26°C in the first days to 23°C by the end.

A typical August day in Voiron reaches about 25°C in the afternoon and slips back to 14°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 31°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12615
22615
32615
42615
52615
62515
72515
82515
92515
102515
112515
122515
132514
142514
152514
162514
172514
182514
192514
202514
212514
222514
232414
242414
252414
262413
272413
282413
292313
302313
312313

How August really feels in Voiron

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.

Voiron weather by month

How August compares with the rest of the year at a glance. August is the 2nd-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°10512.86.48.90.3
Feb / -1°9211.35.710.10.9
Mar12° / 9612.43.711.62.9
Apr15° / 11213.62.113.24.1
May19° / 13315.30.314.65.3
Jun23° / 13°10813.2015.46.3
Jul25° / 15°9710.9015.17.0
Aug25° / 14°9410.7013.97.0
Sep20° / 11°10310.6012.36.3
Oct16° / 11111.50.310.74.7
Nov10° / 13213.13.39.32.0
Dec / -1°11613.168.60.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% 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 35%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26634
36634
46634
56535
66535
76535
86436
96535
106535
116535
126535
136535
146535
156535
166634
176634
186634
196634
206634
216634
226535
236436
246436
256436
266337
276337
286139
296139
306238
316139

Chance of precipitation in August

Any precipitation

Voiron gets around 94 mm of rain over 10.7 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 34% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
337
437
537
637
737
837
937
1037
1136
1236
1335
1435
1534
1634
1733
1833
1933
2032
2132
2232
2332
2432
2532
2632
2732
2832
2932
3031
3131

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 43% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12744291
22743291
32743301
42842291
52942291
62941291
73041281
83141281
93241271
103341261
113341251
123442241
133542231
143543221
153643211
163644200
173644190
183745180
193746171
203746161
213846161
223846151
233945141
244145141
254244131
264443131
274641121
284840111
295039111
305138101
31533791

Wind in August

Winds average 6 km/h in August.

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 36 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 84 minutes over August. Sunrise moves from 5:26 AM to 6:03 AM, and sunset from 8:02 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.65:268:02
214.65:278:00
314.55:287:59
414.55:297:58
514.45:307:56
614.45:327:55
714.35:337:54
814.35:347:52
914.35:357:51
1014.25:367:49
1114.25:387:48
1214.15:397:46
1314.15:407:44
1414.05:417:43
1514.05:437:41
1613.95:447:40
1713.95:457:38
1813.85:467:36
1913.85:487:35
2013.75:497:33
2113.75:507:31
2213.65:517:29
2313.65:537:28
2413.55:547:26
2513.55:557:24
2613.45:567:22
2713.45:587:20
2813.35:597:18
2913.36:007:17
3013.26:017:15
3113.26:037:13

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.43 kWh/m².

For context, solar energy here swings from a low near 1.21 kWh/m² to a high of 6.23 kWh/m² in July across the year — August's 5.43 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.8Bright
45.8Bright
55.8Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.4Bright
195.4Bright
205.4Bright
215.3Bright
225.3Bright
235.2Bright
245.2Bright
255.1Bright
265.1Bright
275.0Bright
285.0Bright
294.9Bright
304.8Bright
314.8Bright
Planning a trip in August

Is August a good time to visit Voiron?

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

7.0
Sightseeing
1st-best month of the year
6.2
Beach & pool
2nd-best month of the year

August is one of the better times to visit Voiron for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Voiron in August

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

In August, Voiron sees daytime highs around 25°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in Voiron 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 Voiron peaks around July 16 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 16UV 9Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar4Moderate
Apr5High
May7High
Jun7Very high
Jul9Very high
Aug7High
Sep5High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Voiron 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 Voiron is worst in March — around 17 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateMar 2117 µg/m³Aug 1312 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb15Moderate
Mar17Moderate
Apr17Moderate
May14Moderate
Jun16Moderate
Jul12Good
Aug12Good
Sep12Moderate
Oct13Moderate
Nov13Moderate
Dec15Moderate
Location & terrain

Where is Voiron?

Voiron sits at 45.4°N, 5.6°E, 301 m above sea level, in France. The nearest listed city is Saint-Égrève, 16 km away.

Topography around Voiron

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

Within 3 km, the terrain around Voiron has significant variations in elevation — a maximum elevation change of 580 m around an average of 383 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,724 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,838 m.

The land around Voiron is covered by trees (47%), grassland (26%) and artificial surfaces (20%) within 3 km, trees (56%) and grassland (25%) within 16 km, and trees (52%) and grassland (26%) within 80 km.

3 km
580 m
16 km
1,724 m
80 km
3,838 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Saint-Égrève 16 km · Fontaine 21 km · Meylan 23 km · Grenoble 23 km · Saint-Martin-d'Hères 25 km · Échirolles 26 km · Chambéry 34 km · Villefontaine 44 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
Roman Catholic 47%none 33%Muslim 4%Protestant 2%

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 Voiron (45.3647°, 5.5856°, elevation 301 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).