Oyonnax weather in August

In August, Oyonnax sees average daytime highs of 23°C and overnight lows near 14°C, with 124 mm of rain across 12.8 wet days and about 14 hours of daylight. It is the 2nd-warmest and 10th-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 37% 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 Oyonnax's 2nd-clearest and 12th-windiest month. For the whole year in context, see Oyonnax's year-round climate.

Daytime high
23°
2nd warmest
Overnight low
14°
11th coldest
Rainfall
124 mm
12.8 wet days
Daylight
14 hours
5:42 AM – 7:41 PM
Cloud cover
51%
2nd clearest
Wind
7 km/h
12th windiest
Solar energy
5.22 kWh/m²
Travel score
6.6
out of 10

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 Oyonnax reaches about 23°C in the afternoon and slips back to 14°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 29°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
132414
142414
152414
162414
172414
182314
192314
202313
212313
222313
232313
242313
252313
262213
272213
282213
292212
302212
312212

How August really feels in Oyonnax

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.

Oyonnax weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°14113.36.98.80.0
Feb / -1°11711.76.5100.5
Mar11° / 12613.24.411.62.4
Apr14° / 12414.3213.33.7
May18° / 15016.40.314.74.9
Jun22° / 12°13414.5015.55.9
Jul24° / 14°12413.6015.26.6
Aug23° / 14°12412.80146.6
Sep19° / 10°12611.9012.35.8
Oct14° / 13913.40.310.73.9
Nov / 15213.93.59.21.4
Dec / -0°16214.16.48.50.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% 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 43%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35842
45743
55743
65644
75644
85644
95644
105644
115644
125743
135743
145743
155842
165842
175842
185941
195941
205941
215941
225842
235941
245941
255842
265743
275644
285644
295644
305644
315545

Chance of precipitation in August

Any precipitation

Oyonnax gets around 124 mm of rain over 12.8 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 43% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
142
242
342
442
542
643
743
843
943
1043
1143
1242
1342
1442
1541
1641
1741
1841
1940
2040
2140
2240
2340
2439
2539
2639
2738
2838
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 (%)
1314227
2314227
3324127
4324127
5334126
6334026
7344025
8354025
9364024
10364023
11374122
12374121
13384221
14384220
15394219
16394318
17394318
18394417
19404417
20404416
21414316
22424316
23434215
24444115
25464014
26483914
27493713
28513613
29533512
30553411
31583210

Wind in August

Winds average 7 km/h in August, the calmest month.

Across August, 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
57calm
67calm
77calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

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 5:23 AM to 6:01 AM, and sunset from 8:04 PM to 7:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.75:238:04
214.65:248:03
314.65:258:01
414.65:278:00
514.55:287:58
614.55:297:57
714.45:307:56
814.45:327:54
914.35:337:53
1014.35:347:51
1114.25:357:49
1214.25:377:48
1314.15:387:46
1414.15:397:45
1514.05:407:43
1614.05:427:41
1713.95:437:40
1813.95:447:38
1913.85:467:36
2013.85:477:34
2113.75:487:32
2213.75:497:31
2313.65:517:29
2413.65:527:27
2513.55:537:25
2613.55:557:23
2713.45:567:21
2813.45:577:19
2913.35:597:18
3013.36:007:16
3113.26:017:14

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.22 kWh/m².

For context, solar energy here swings from a low near 1.1 kWh/m² to a high of 5.98 kWh/m² in July across the year — August's 5.22 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.6Bright
45.6Bright
55.6Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.4Bright
115.4Bright
125.4Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.2Bright
185.2Bright
195.2Bright
205.1Bright
215.1Bright
225.1Bright
235.0Bright
245.0Bright
254.9Bright
264.9Bright
274.8Bright
284.8Bright
294.7Bright
304.7Bright
314.6Bright
Planning a trip in August

Is August a good time to visit Oyonnax?

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
5.3
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Oyonnax for sightseeing.

What to pack for Oyonnax in August

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

In August, Oyonnax sees daytime highs around 23°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Oyonnax 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 Oyonnax 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
Feb2Low
Mar4Moderate
Apr5High
May6High
Jun7Very high
Jul9Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Oyonnax 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 Oyonnax 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 Oyonnax?

Oyonnax sits at 46.3°N, 5.7°E, 556 m above sea level, in France. The nearest listed city is Meyrin, 33 km away.

Topography around Oyonnax

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

Within 3 km, the terrain around Oyonnax has significant variations in elevation — a maximum elevation change of 587 m around an average of 648 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,257 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,448 m.

The land around Oyonnax is covered by trees (65%) and artificial surfaces (25%) within 3 km, trees (76%) within 16 km, and trees (49%) and grassland (27%) within 80 km.

3 km
587 m
16 km
1,257 m
80 km
2,448 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Meyrin 33 km · Vernier 33 km · Bourg-en-Bresse 34 km · Onex 35 km · Lancy 36 km · Carouge 38 km · Geneva 38 km · Annemasse 45 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 Oyonnax (46.2592°, 5.6573°, elevation 556 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).