Oyonnax weather in May

In May, Oyonnax sees average daytime highs of 18°C and overnight lows near 9°C, with 150 mm of precipitation across 16.4 wet days and about 14.7 hours of daylight. It is the 5th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 20°C by the end. The sky is clear or mostly clear about 21% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 06 min at the start of May to 15 h 18 min by month's end. Set against the rest of the year, May is Oyonnax's 9th-clearest and 4th-windiest month. For the whole year in context, see Oyonnax's year-round climate.

Daytime high
18°
5th warmest
Overnight low
8th coldest
Precipitation
150 mm
16.4 wet days
Daylight
14 h 48 min
5:11 AM – 7:57 PM
Cloud cover
65%
9th clearest
Wind
8 km/h
4th windiest
Solar energy
5.34 kWh/m²
Travel score
4.9
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 16°C in the first days to 20°C by the end.

A typical May day in Oyonnax reaches about 18°C in the afternoon and slips back to 9°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 24°C. Set against its neighbours, May runs about 4°C warmer than April and about 4°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1167
2167
3167
4167
5168
6178
7178
8178
9178
10178
11178
12178
13178
14188
15189
16189
17189
18189
19189
20189
21199
22199
23199
241910
251910
261910
271910
282010
292010
302010
312010

How May really feels in Oyonnax

Once humidity and wind are folded in, May 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

May 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 May compares with the rest of the year at a glance. May is the 5th-warmest and 3rd-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23169
33169
43070
53169
63169
73169
83169
93268
103367
113367
123466
133565
143664
153664
163763
173961
184060
194060
204159
214258
224258
234357
244357
254357
264357
274357
284258
294159
304159
314060

Chance of precipitation in May

Any precipitationSnow

Oyonnax gets around 150 mm of rain and snow over 16.4 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 53% and peaks near 59% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1572
2582
3582
4592
5592
6592
7581
8581
9581
10571
11571
12561
13551
14551
15541
16531
17530
18520
19510
20500
21490
22480
23480
24480
25480
26480
27490
28490
29500
30510
31520

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19910
29910
39910
49910
59820
69820
79820
89820
99730
109730
119730
129730
139730
149640
159640
169550
179550
189460
199370
209370
219280
229190
2390100
2488120
2587130
2686140
2785150
2882171
2981181
3080191
3179201

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 06 min at the start of May to 15 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over May. Sunrise moves from 5:32 AM to 4:56 AM, and sunset from 7:37 PM to 8:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:327:37
214.15:307:39
314.25:297:40
414.25:277:41
514.35:267:43
614.35:247:44
714.45:237:45
814.45:217:47
914.55:207:48
1014.55:187:49
1114.65:177:50
1214.65:167:52
1314.65:147:53
1414.75:137:54
1514.75:127:55
1614.85:117:57
1714.85:097:58
1814.85:087:59
1914.95:078:00
2014.95:068:01
2115.05:058:03
2215.05:048:04
2315.05:038:05
2415.15:028:06
2515.15:018:07
2615.15:008:08
2715.24:598:09
2815.24:598:10
2915.24:588:11
3015.24:578:12
3115.34:568:13

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.34 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 — May's 5.34 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
65.0Bright
75.0Bright
85.0Bright
95.1Bright
105.1Bright
115.1Bright
125.2Bright
135.2Bright
145.3Bright
155.3Bright
165.3Bright
175.4Bright
185.4Bright
195.5Bright
205.5Bright
215.5Bright
225.6Bright
235.6Bright
245.6Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in May

Is May a good time to visit Oyonnax?

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

4.9
Sightseeing
5th-best month of the year
1.6
Beach & pool
5th-best month of the year

May is a reasonable time to visit Oyonnax for sightseeing.

What to pack for Oyonnax in May

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

In May, Oyonnax sees daytime highs around 18°C and nights near 9°C. Pack rain gear. Worth having: sun protection. About 16 days see rain.

rain gearsun protection

UV index in Oyonnax in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — 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 May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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
May 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).