Cleethorpes weather in September

In September, Cleethorpes sees average daytime highs of 18°C and overnight lows near 11°C, with 56 mm of rain across 9.8 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 5th-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 13% 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 Cleethorpes's 7th-clearest and 8th-windiest month. For the whole year in context, see Cleethorpes's year-round climate.

Daytime high
18°
4th warmest
Overnight low
11°
10th coldest
Rainfall
56 mm
9.8 wet days
Daylight
12 h 24 min
5:42 AM – 6:07 PM
Cloud cover
71%
7th clearest
Wind
17 km/h
8th windiest
Solar energy
2.99 kWh/m²
Travel score
5.5
out of 10

Cleethorpes is seaside resort town in North East Lincolnshire, England.

Density
4,149/km²
people per km²

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 Cleethorpes 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 14°C and 21°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)
11912
21912
31912
41912
51912
61912
71911
81811
91811
101811
111811
121811
131811
141811
151811
161811
171811
181711
191711
201711
211710
221710
231710
241710
251710
261710
271610
281610
291610
301610

How September really feels in Cleethorpes

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.

Cleethorpes weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 4911.20.97.80.8
Feb / 409.71.19.41.1
Mar10° / 4311.10.611.51.9
Apr12° / 4811.20.113.73.0
May15° / 5210.9015.64.3
Jun18° / 11°6511.9016.75.3
Jul20° / 13°7012.8016.35.8
Aug20° / 13°6611.7014.65.9
Sep18° / 11°569.8012.55.5
Oct14° / 5910.8010.33.8
Nov10° / 55120.28.32.1
Dec / 5211.217.31.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 70%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13268
23268
33268
43268
53268
63367
73268
83268
93268
103268
113268
123268
133268
143268
153169
163070
173070
182971
192971
202971
212971
222971
232971
242872
252773
262872
272872
282872
292872
302872

Chance of precipitation in September

Any precipitation

Cleethorpes gets around 56 mm of rain over 9.8 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 33% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
135
234
334
434
533
633
733
833
933
1032
1132
1232
1332
1432
1532
1631
1731
1831
1931
2032
2132
2232
2333
2433
2534
2634
2735
2835
2936
3036

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 80% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
171254
273243
373243
473243
574233
674233
775223
875223
976213
1077203
1178193
1278193
1379183
1481172
1582162
1683152
1783152
1884151
1984151
2084151
2184151
2284151
2385150
2485150
2585150
2685150
2786140
2886140
2987130
3087130

Wind in September

Winds average 17 km/h in September.

Across September, daily wind ranges from about 17 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
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
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light 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 5:15 AM to 6:07 AM, and sunset from 6:45 PM to 5:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:156:45
213.45:176:42
313.45:186:40
413.35:206:37
513.25:226:35
613.15:246:32
713.15:266:30
813.05:276:27
912.95:296:25
1012.95:316:22
1112.85:336:20
1212.75:356:17
1312.65:366:15
1412.65:386:12
1512.55:406:10
1612.45:426:07
1712.35:446:04
1812.35:466:02
1912.25:475:59
2012.15:495:57
2112.15:515:54
2212.05:535:52
2311.95:555:49
2411.85:565:47
2511.85:585:44
2611.76:005:42
2711.66:025:39
2811.56:045:36
2911.56:065:34
3011.46:075:31

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.99 kWh/m².

For context, solar energy here swings from a low near 0.56 kWh/m² to a high of 5.23 kWh/m² in June across the year — September's 2.99 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.5Moderate
43.5Moderate
53.5Moderate
63.4Moderate
73.4Moderate
83.3Moderate
93.3Moderate
103.2Moderate
113.2Moderate
123.1Moderate
133.1Moderate
143.0Moderate
153.0Moderate
163.0Moderate
172.9Moderate
182.9Moderate
192.8Moderate
202.8Moderate
212.7Moderate
222.7Moderate
232.6Moderate
242.6Moderate
252.6Moderate
262.5Moderate
272.5Moderate
282.4Moderate
292.4Moderate
302.3Moderate
Planning a trip in September

Is September a good time to visit Cleethorpes?

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

5.5
Sightseeing
3rd-best month of the year
1.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Cleethorpes for sightseeing.

What to pack for Cleethorpes in September

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

In September, Cleethorpes sees daytime highs around 18°C and nights near 11°C. Worth packing: rain gear. About 10 days see rain.

rain gear

Sea temperature near Cleethorpes in September

The nearest coast averages about 14°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 13 km away) is warmest in August at about 15°C and coldest in February near 6°C.

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

5°10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan7Bracing
Feb6Bracing
Mar6Bracing
Apr8Bracing
May9Bracing
Jun12Bracing
Jul14Bracing
Aug15Bracing
Sep14Bracing
Oct13Bracing
Nov10Bracing
Dec8Bracing

UV index in Cleethorpes 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 Cleethorpes peaks around August 12 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 12UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr3Moderate
May5High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Low
Nov1Low
Dec1Low
Location & terrain

Where is Cleethorpes?

Cleethorpes sits at 53.6°N, 0.0°W, 13 m above sea level, in United Kingdom. The nearest listed city is Grimsby, 3.0 km away.

Topography around Cleethorpes

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

Within 3 km, the terrain around Cleethorpes has only modest variations in elevation — a maximum elevation change of 27 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 140 m; within 80 km, significant variations in elevation — a maximum elevation change of 268 m.

The land around Cleethorpes is covered by water (44%) and artificial surfaces (30%) within 3 km, cropland (43%) and water (35%) within 16 km, and cropland (49%) and water (30%) within 80 km.

3 km
27 m
16 km
140 m
80 km
268 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Grimsby 3.0 km · Louth 22 km · Kingston upon Hull 29 km · Brough 40 km · Beverley 41 km · Scunthorpe 41 km · Lincoln 50 km · Skegness 52 km

United Kingdom travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type D / G / M
230 V · 50 Hz
Prices
≈ 89% of US
price level, 2025
GDP per capita
$57,602
2025
Happiness
6.7 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2021
Road deaths
3.2
per 100k/yr, 2019
Income group
High
World Bank
Religion
Christian 60%none 26%Muslim 4%other 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 Cleethorpes (53.5605°, -0.0323°, elevation 13 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).