Delfzijl weather in September

In September, Delfzijl sees average daytime highs of 18°C and overnight lows near 11°C, with 69 mm of rain across 11.5 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 19°C in the first days to 16°C by the end. The sky is clear or mostly clear about 16% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 30 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Delfzijl's 5th-clearest and 9th-windiest month. For the whole year in context, see Delfzijl's year-round climate.

Daytime high
18°
4th warmest
Overnight low
11°
9th coldest
Rainfall
69 mm
11.5 wet days
Daylight
12 h 24 min
6:14 AM – 6:39 PM
Cloud cover
67%
5th clearest
Wind
14 km/h
9th windiest
Solar energy
2.97 kWh/m²
Travel score
5.4
out of 10

Delfzijl is city in Eemsdelta, Netherlands.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 19°C in the first days to 16°C by the end.

A typical September day in Delfzijl reaches about 18°C in the afternoon and slips back to 11°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 22°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12012
22012
32012
41912
51912
61912
71912
81912
91912
101911
111911
121911
131811
141811
151811
161811
171811
181811
191811
201810
211710
221710
231710
241710
251710
261710
271710
281610
291610
30169

How September really feels in Delfzijl

Once humidity and wind are folded in, September 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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Delfzijl weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 65131.67.80.0
Feb / 5010.629.40.2
Mar / 5311.40.911.51.7
Apr13° / 5310.90.113.73.6
May17° / 6411.9015.65.0
Jun19° / 11°8213.2016.65.5
Jul22° / 14°9414.8016.25.8
Aug21° / 14°8714.4014.65.8
Sep18° / 11°6911.5012.45.4
Oct14° / 6312.5010.33.6
Nov / 5712.50.28.41.4
Dec / 6312.81.87.40.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23565
33664
43664
53664
63664
73565
83664
93763
103763
113763
123664
133664
143664
153763
163763
173763
183763
193763
203664
213664
223565
233367
243367
253367
263268
273169
283169
293169
302971

Chance of precipitation in September

Any precipitation

Delfzijl gets around 69 mm of rain over 11.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 44% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
144
243
342
442
541
640
740
839
939
1039
1138
1238
1337
1437
1536
1636
1736
1836
1936
2037
2137
2238
2339
2439
2540
2641
2742
2843
2943
3044

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 71% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1553591
2563581
3573580
4593470
5593470
6603370
7603370
8623260
9633160
10643060
11652960
12672850
13692650
14712540
15722440
16732340
17752230
18762130
19782020
20782020
21791920
22801910
23801910
24801910
25821800
26821800
27821800
28831700
29831700
30841600

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 30 min at the start of September to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 126 minutes over September. Sunrise moves from 5:47 AM to 6:40 AM, and sunset from 7:17 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:477:17
213.45:497:14
313.35:517:12
413.35:537:09
513.25:557:07
613.15:567:04
713.15:587:02
813.06:006:59
912.96:026:57
1012.86:036:54
1112.86:056:52
1212.76:076:49
1312.66:096:47
1412.66:116:44
1512.56:126:42
1612.46:146:39
1712.36:166:37
1812.36:186:34
1912.26:206:31
2012.16:216:29
2112.16:236:26
2212.06:256:24
2311.96:276:21
2411.86:296:19
2511.86:306:16
2611.76:326:14
2711.66:346:11
2811.56:366:09
2911.56:386:06
3011.46:406:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.97 kWh/m².

For context, solar energy here swings from a low near 0.51 kWh/m² to a high of 5.47 kWh/m² in June across the year — September's 2.97 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.5Moderate
33.5Moderate
43.5Moderate
53.4Moderate
63.4Moderate
73.3Moderate
83.3Moderate
93.2Moderate
103.2Moderate
113.2Moderate
123.1Moderate
133.1Moderate
143.0Moderate
153.0Moderate
163.0Moderate
172.9Moderate
182.9Moderate
192.8Moderate
202.8Moderate
212.8Moderate
222.7Moderate
232.6Moderate
242.6Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.4Moderate
292.4Moderate
302.3Moderate
Planning a trip in September

Is September a good time to visit Delfzijl?

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

5.4
Sightseeing
4th-best month of the year
1.9
Beach & pool
4th-best month of the year

September is a reasonable time to visit Delfzijl for sightseeing.

What to pack for Delfzijl in September

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

In September, Delfzijl sees daytime highs around 18°C and nights near 11°C. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Delfzijl in September

The nearest coast averages about 17°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 19°C and coldest in February near 4°C.

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

0°5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan4Bracing
Feb4Bracing
Mar5Bracing
Apr8Bracing
May12Bracing
Jun15Cool
Jul18Cool
Aug19Cool
Sep17Cool
Oct13Bracing
Nov9Bracing
Dec6Bracing

UV index in Delfzijl in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Delfzijl peaks around June 23 at about 6 (high) — a little sun protection helps at midday. It bottoms out near January 1 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 23UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr3Moderate
May5High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Low
Nov1Low
Dec1Low
Location & terrain

Where is Delfzijl?

Delfzijl sits at 53.3°N, 6.9°E, 0 m above sea level, in The Netherlands. The nearest listed city is Emden, 20 km away.

EmdenHoogezandWinschotenVeendamKorrewegwijkGroningenWeenerNorden

Topography around Delfzijl

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

Within 3 km, the terrain around Delfzijl has only modest variations in elevation — a maximum elevation change of 29 m around an average of 1 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 30 m; within 80 km, only modest variations in elevation — a maximum elevation change of 104 m.

The land around Delfzijl is covered by water (35%) and grassland (34%) within 3 km, cropland (38%), grassland (28%) and water (26%) within 16 km, and grassland (31%), water (31%) and cropland (22%) within 80 km.

3 km
29 m
16 km
30 m
80 km
104 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Emden 20 km · Hoogezand 21 km · Winschoten 22 km · Veendam 25 km · Korrewegwijk 26 km · Groningen 26 km · Weener 34 km · Norden 35 km

The Netherlands travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 84% of US
price level, 2025
GDP per capita
$73,684
2025
Happiness
7.2 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
4
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 624
Religion
none 54%Roman Catholic 20%Protestant 15%other 6%

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 Delfzijl (53.33°, 6.9181°, elevation 0 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).