Oyonnax in Summer
In summer (June, July and August), Oyonnax sees average daytime highs around 23°C and overnight lows near 13°C, with 382 mm of rain over about 41 wet days across the season. It is the warmest season of the year and the driest season of the year.
Across summer, daytime highs hold fairly steady around 23°C. The sky is clear or mostly clear about 35% of the time across summer, and the air most often feels dry.
Summer is Oyonnax's best season of the year to visit on our travel score. For the whole year in context, see Oyonnax's year-round climate.
- Avg daytime high
- 23°C
- warmest season of the year
- Avg overnight low
- 13°C
- Rainfall
- 382 mm
- 41 wet days
- Avg wind
- 7 km/h
- Travel score
- 6.4
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Oyonnax in Summer
Across summer, daytime highs hold fairly steady around 23°C.
A typical summer day in Oyonnax reaches about 23°C and drops to 13°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Oyonnax
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer 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 the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 5° / -1° | 141 | 13.3 | 6.9 | 8.8 | 0.0 |
| Feb | 6° / -1° | 117 | 11.7 | 6.5 | 10 | 0.5 |
| Mar | 11° / 2° | 126 | 13.2 | 4.4 | 11.6 | 2.4 |
| Apr | 14° / 5° | 124 | 14.3 | 2 | 13.3 | 3.7 |
| May | 18° / 9° | 150 | 16.4 | 0.3 | 14.7 | 4.9 |
| Jun | 22° / 12° | 134 | 14.5 | 0 | 15.5 | 5.9 |
| Jul | 24° / 14° | 124 | 13.6 | 0 | 15.2 | 6.6 |
| Aug | 23° / 14° | 124 | 12.8 | 0 | 14 | 6.6 |
| Sep | 19° / 10° | 126 | 11.9 | 0 | 12.3 | 5.8 |
| Oct | 14° / 7° | 139 | 13.4 | 0.3 | 10.7 | 3.9 |
| Nov | 9° / 2° | 152 | 13.9 | 3.5 | 9.2 | 1.4 |
| Dec | 5° / -0° | 162 | 14.1 | 6.4 | 8.5 | 0.1 |
Cloud cover in Summer
The sky is clear or mostly clear about 35% of the time across summer.
Chance of precipitation in Summer
Oyonnax gets around 382 mm of rain over 41 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 7 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 h 18 min in early June to 13 h 12 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.7 kWh/m².
Is summer a good time to visit Oyonnax?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Oyonnax for sightseeing.
What to pack for Oyonnax in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Oyonnax sees daytime highs around 23°C and nights near 13°C. Pack rain gear. Worth having: light clothes and sun protection. About 41 days see rain.
UV index in Oyonnax in Summer
Clear-sky midday UV across summer averages 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 5 | 6 | 7 | 9 | 7 | 5 | 3 | 2 | 1 |
| Level | Low | Low | Moderate | High | High | Very high | Very high | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 4 | Moderate |
| Apr | 5 | High |
| May | 6 | High |
| Jun | 7 | Very high |
| Jul | 9 | Very high |
| Aug | 7 | High |
| Sep | 5 | Moderate |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Air quality in Oyonnax in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 13 | 12 | 15 | 15 | 13 | 15 | 11 | 11 | 11 | 10 | 10 | 11 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 12 | Moderate |
| Mar | 15 | Moderate |
| Apr | 15 | Moderate |
| May | 13 | Moderate |
| Jun | 15 | Moderate |
| Jul | 11 | Good |
| Aug | 11 | Good |
| Sep | 11 | Good |
| Oct | 10 | Good |
| Nov | 10 | Good |
| Dec | 11 | Good |
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.
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 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.