Saint-Omer weather in January

In January, Saint-Omer sees average daytime highs of 7°C and overnight lows near 2°C, with 62 mm of precipitation across 12 wet days and about 8.2 hours of daylight. It is the 12th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 7°C through the month. The sky is clear or mostly clear about 15% of the time in January, and the air most often feels dry.

Daylight stretches from about 7 h 48 min at the start of January to 8 h 54 min by month's end. Set against the rest of the year, January is Saint-Omer's 9th-clearest and 1st-windiest month. For the whole year in context, see Saint-Omer's year-round climate.

Daytime high
12th warmest
Overnight low
2nd coldest
Precipitation
62 mm
12 wet days
Daylight
8 h 12 min
8:54 AM – 5:06 PM
Cloud cover
73%
9th clearest
Wind
17 km/h
1st windiest
Solar energy
0.86 kWh/m²
Travel score
0.7
out of 10
Air quality
Good
PM10 19.4 µg/m³ · 2019

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 7°C through the month.

A typical January day in Saint-Omer reaches about 7°C in the afternoon and slips back to 2°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 1°C and 11°C. Set against its neighbours, January runs on par with December and on par with February.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
173
273
373
473
573
673
773
873
973
1073
1173
1273
1373
1473
1573
1673
1773
1872
1972
2072
2172
2272
2372
2462
2562
2662
2762
2862
2962
3062
3172

How January really feels in Saint-Omer

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.

Saint-Omer weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 621218.20.7
Feb / 5310.61.19.71.0
Mar10° / 5110.90.811.52.3
Apr14° / 5211.10.113.53.7
May17° / 6511.3015.25.1
Jun19° / 12°6310.3016.26.0
Jul22° / 14°5911015.86.4
Aug22° / 14°7111.2014.36.4
Sep19° / 12°5710.1012.45.8
Oct15° / 6512010.44.1
Nov10° / 6812.70.38.72.1
Dec / 7512.61.17.80.9

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 13% of January, with mostly cloudy or overcast conditions the remaining 72%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22773
32773
42773
52773
62872
72971
82971
92971
103070
113070
123070
133169
143169
153169
163070
173070
183070
193070
203070
213070
222971
232872
242872
252872
262773
272773
282674
292575
302575
312575

Chance of precipitation in January

Any precipitationSnow

Saint-Omer gets around 62 mm of rain and snow over 12 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 39% and peaks near 42% on the wettest days, and about 1 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1423
2413
3413
4413
5413
6403
7403
8403
9403
10403
11393
12393
13393
14393
15393
16393
17383
18383
19383
20383
21383
22383
23383
24383
25374
26374
27374
28374
29374
30364
31364

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 17 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 7 h 48 min at the start of January to 8 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over January. Sunrise moves from 9:00 AM to 8:39 AM, and sunset from 4:48 PM to 5:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
17.89:004:48
27.89:004:49
37.89:004:50
47.99:004:51
57.98:594:52
67.98:594:53
77.98:594:55
88.08:594:56
98.08:584:57
108.08:584:58
118.08:574:59
128.18:575:01
138.18:565:02
148.18:565:03
158.28:555:05
168.28:545:06
178.28:545:08
188.38:535:09
198.38:525:11
208.48:515:12
218.48:505:14
228.48:495:15
238.58:485:17
248.58:475:18
258.68:465:20
268.68:455:22
278.78:445:23
288.78:425:25
298.88:415:27
308.88:405:28
318.98:395:30

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 0.86 kWh/m².

For context, solar energy here swings from a low near 0.68 kWh/m² to a high of 5.56 kWh/m² in June across the year — January's 0.86 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.7Dim
20.7Dim
30.7Dim
40.7Dim
50.7Dim
60.7Dim
70.7Dim
80.8Dim
90.8Dim
100.8Dim
110.8Dim
120.8Dim
130.8Dim
140.8Dim
150.8Dim
160.8Dim
170.9Dim
180.9Dim
190.9Dim
200.9Dim
210.9Dim
220.9Dim
231.0Dim
241.0Dim
251.0Dim
261.0Dim
271.1Dim
281.1Dim
291.1Dim
301.1Dim
311.2Dim
Planning a trip in January

Is January a good time to visit Saint-Omer?

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

0.7
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 Saint-Omer.

What to pack for Saint-Omer in January

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

In January, Saint-Omer sees daytime highs around 7°C and nights near 2°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 12 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Saint-Omer in January

The nearest coast averages about 8°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 43 km away) is warmest in August at about 18°C and coldest in February near 7°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan8Bracing
Feb7Bracing
Mar7Bracing
Apr9Bracing
May12Bracing
Jun15Bracing
Jul17Cool
Aug18Cool
Sep18Cool
Oct15Cool
Nov13Bracing
Dec10Bracing

UV index in Saint-Omer 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 Saint-Omer peaks around June 22 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 21 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 22UV 6Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun7High
Jul6High
Aug7High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Saint-Omer?

Saint-Omer sits at 50.7°N, 2.3°E, 10 m above sea level, in France. The nearest listed city is Hazebrouck, 20 km away.

Topography around Saint-Omer

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

Within 3 km, the terrain around Saint-Omer has only modest variations in elevation — a maximum elevation change of 85 m around an average of 18 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 206 m; within 80 km, significant variations in elevation — a maximum elevation change of 272 m.

The land around Saint-Omer is covered by trees (25%), artificial surfaces (25%) and grassland (24%) within 3 km, cropland (57%) within 16 km, and cropland (41%) and water (31%) within 80 km.

3 km
85 m
16 km
206 m
80 km
272 m
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: Hazebrouck 20 km · Grande-Synthe 30 km · Coudekerque-Branche 32 km · Saint-Pol-sur-Mer 32 km · Dunkirk 33 km · Poperinge 35 km · Bruay-la-Buissière 36 km · Béthune 36 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 Saint-Omer (50.7483°, 2.2609°, elevation 10 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).