Oyonnax weather in January

In January, Oyonnax sees average daytime highs of 5°C and overnight lows near -1°C, with 141 mm of precipitation across 13.3 wet days and about 8.8 hours of daylight. It is the 12th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 5°C through the month. The sky is clear or mostly clear about 27% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 30 min at the start of January to 9 h 18 min by month's end. Set against the rest of the year, January is Oyonnax's 8th-clearest and 6th-windiest month. For the whole year in context, see Oyonnax's year-round climate.

Daytime high
12th warmest
Overnight low
-1°
1st coldest
Precipitation
141 mm
13.3 wet days
Daylight
8 h 48 min
8:23 AM – 5:10 PM
Cloud cover
65%
8th clearest
Wind
8 km/h
6th windiest
Solar energy
1.36 kWh/m²
Travel score
0.0
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 5°C through the month.

A typical January day in Oyonnax reaches about 5°C in the afternoon and slips back to -1°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between -0°C and 9°C. Set against its neighbours, January runs on par with December and about 1°C cooler than February.

-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
15-1
25-1
35-1
45-1
55-1
65-1
75-1
85-1
95-1
105-1
115-1
125-1
135-1
145-1
155-1
165-1
175-1
185-1
195-1
205-1
215-1
225-1
234-1
244-1
254-1
265-1
275-1
285-1
295-1
305-1
315-1

How January really feels in Oyonnax

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 31 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
31
wind chill below the day's low

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Oyonnax weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 4th-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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 11% of January, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33466
43466
53466
63565
73664
83763
93763
103862
113862
123961
133961
144060
154060
164159
174159
184159
194159
204060
214060
224060
234060
243961
253961
263961
273961
283862
293961
303961
313862

Chance of precipitation in January

Any precipitationSnow

Oyonnax gets around 141 mm of rain and snow over 13.3 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 43% and peaks near 47% on the wettest days, and about 7 days bring snow. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
14722
24722
34722
44622
54621
64621
74521
84521
94421
104421
114421
124322
134323
144323
154323
164324
174324
184224
194225
204225
214225
224125
234125
244125
254125
264124
274124
284024
294023
304023
314023

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in January

Winds average 8 km/h in January.

Across January, daily wind ranges from about 8 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
318calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 30 min at the start of January to 9 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over January. Sunrise moves from 8:26 AM to 8:11 AM, and sunset from 4:55 PM to 5:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.58:264:55
28.58:264:56
38.58:264:56
48.58:264:57
58.58:264:58
68.68:264:59
78.68:265:00
88.68:265:01
98.68:265:02
108.68:255:03
118.78:255:05
128.78:255:06
138.78:245:07
148.78:245:08
158.88:235:09
168.88:235:10
178.88:225:12
188.98:225:13
198.98:215:14
208.98:205:16
219.08:205:17
229.08:195:18
239.08:185:20
249.18:175:21
259.18:165:22
269.18:165:24
279.28:155:25
289.28:145:27
299.38:135:28
309.38:125:29
319.38:115:31

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.36 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 — January's 1.36 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.1Dim
21.1Dim
31.1Dim
41.1Dim
51.2Dim
61.2Dim
71.2Dim
81.2Dim
91.2Dim
101.2Dim
111.3Dim
121.3Dim
131.3Dim
141.3Dim
151.3Dim
161.4Dim
171.4Dim
181.4Dim
191.4Dim
201.4Dim
211.5Dim
221.5Dim
231.5Dim
241.5Dim
251.6Dim
261.6Dim
271.6Dim
281.6Dim
291.7Dim
301.7Dim
311.7Dim
Planning a trip in January

Is January a good time to visit Oyonnax?

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

0.0
Sightseeing
12th-best month of the year
0.0
Beach & pool
8th-best month of the year

January is a weaker month for outdoor sightseeing in Oyonnax.

What to pack for Oyonnax in January

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

In January, Oyonnax sees daytime highs around 5°C and nights near -1°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 13 days see rain.

a warm layera heavy coatrain gear

UV index in Oyonnax in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 1. 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 January

GoodModeratePoorUnhealthyVery unhealthy

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