Darlington weather in September

In September, Darlington sees average daytime highs of 16°C and overnight lows near 10°C, with 56 mm of rain across 9.5 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 15°C by the end. The sky is clear or mostly clear about 10% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Darlington's 7th-clearest and 8th-windiest month. For the whole year in context, see Darlington's year-round climate.

Daytime high
16°
4th warmest
Overnight low
10°
9th coldest
Rainfall
56 mm
9.5 wet days
Daylight
12 h 24 min
5:48 AM – 6:14 PM
Cloud cover
73%
7th clearest
Wind
15 km/h
8th windiest
Solar energy
2.7 kWh/m²
Travel score
5.0
out of 10

Darlington is town in County Durham, England.

Density
4,681/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 18°C in the first days to 15°C by the end.

A typical September day in Darlington reaches about 16°C in the afternoon and slips back to 10°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 20°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)
11811
21811
31810
41810
51810
61710
71710
81710
91710
101710
111710
121710
131710
141710
151710
161610
17169
18169
19169
20169
21169
22169
23169
24169
25159
26159
27159
28159
29159
30158

How September really feels in Darlington

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.

Darlington weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 5512.62.37.60.5
Feb / 50112.39.30.8
Mar / 4710.61.411.51.7
Apr11° / 5511.20.413.72.7
May14° / 5111.4015.74.0
Jun17° / 10°6511.8016.95.0
Jul19° / 12°6411.9016.45.7
Aug19° / 12°6611.7014.75.7
Sep16° / 10°569.5012.55.0
Oct13° / 5811.30.110.23.3
Nov / 6111.80.78.21.7
Dec / 6212.61.77.10.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 75%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12773
22773
32773
42773
52773
62773
72773
82674
92674
102674
112674
122674
132674
142575
152575
162476
172476
182476
192377
202476
212476
222476
232476
242476
252575
262575
272575
282575
292674
302674

Chance of precipitation in September

Any precipitation

Darlington gets around 56 mm of rain over 9.5 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 32% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
132
232
332
432
532
632
732
833
933
1032
1132
1232
1332
1432
1531
1631
1731
1831
1930
2030
2130
2230
2331
2431
2532
2632
2733
2833
2934
3034

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 89% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
182171
282171
383161
483161
583161
683161
784151
884151
984151
1085141
1185141
1286131
1387121
1488120
1589110
1690100
1790100
189190
199190
209280
219280
229280
239370
249370
259370
269460
279460
289460
299550
309550

Wind in September

Winds average 15 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
714light breeze
814light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 36 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 132 minutes over September. Sunrise moves from 5:19 AM to 6:14 AM, and sunset from 6:53 PM to 5:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:196:53
213.55:216:50
313.45:236:47
413.35:256:45
513.35:276:42
613.25:296:40
713.15:316:37
813.05:326:35
913.05:346:32
1012.95:366:29
1112.85:386:27
1212.75:406:24
1312.75:426:21
1412.65:446:19
1512.55:466:16
1612.45:486:14
1712.45:496:11
1812.35:516:08
1912.25:536:06
2012.15:556:03
2112.15:576:00
2212.05:595:58
2311.96:015:55
2411.86:035:52
2511.86:055:50
2611.76:065:47
2711.66:085:45
2811.56:105:42
2911.56:125:39
3011.46:145:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.7 kWh/m².

For context, solar energy here swings from a low near 0.46 kWh/m² to a high of 4.84 kWh/m² in May across the year — September's 2.7 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.3Moderate
23.2Moderate
33.2Moderate
43.2Moderate
53.1Moderate
63.1Moderate
73.0Moderate
83.0Moderate
93.0Moderate
102.9Moderate
112.9Moderate
122.9Moderate
132.8Moderate
142.8Moderate
152.7Moderate
162.7Moderate
172.6Moderate
182.6Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.4Moderate
232.4Moderate
242.3Moderate
252.3Moderate
262.3Moderate
272.2Moderate
282.2Moderate
292.1Moderate
302.1Moderate
Planning a trip in September

Is September a good time to visit Darlington?

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

5.0
Sightseeing
3rd-best month of the year
0.9
Beach & pool
4th-best month of the year

September is a reasonable time to visit Darlington for sightseeing.

What to pack for Darlington in September

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

In September, Darlington sees daytime highs around 16°C and nights near 10°C. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

Sea temperature near Darlington 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 30 km away) is warmest in August at about 15°C and coldest in March near 7°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
Feb7Bracing
Mar7Bracing
Apr7Bracing
May10Bracing
Jun12Bracing
Jul14Bracing
Aug15Bracing
Sep14Bracing
Oct12Bracing
Nov10Bracing
Dec9Bracing

UV index in Darlington in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Darlington peaks around August 10 at about 6 (high) — a little sun protection helps at midday. It bottoms out near December 20 at about 0 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 10UV 6Dec 20UV 0
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr3Moderate
May5High
Jun5High
Jul6High
Aug6High
Sep3Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Darlington?

Darlington sits at 54.5°N, 1.6°W, 40 m above sea level, in United Kingdom. The nearest listed city is Newton Aycliffe, 11 km away.

Topography around Darlington

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

Within 3 km, the terrain around Darlington has only modest variations in elevation — a maximum elevation change of 44 m around an average of 49 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 231 m; within 80 km, large variations in elevation — a maximum elevation change of 906 m.

The land around Darlington is covered by artificial surfaces (43%), grassland (25%) and trees (24%) within 3 km, cropland (50%) and grassland (31%) within 16 km, and grassland (54%) within 80 km.

3 km
44 m
16 km
231 m
80 km
906 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Newton Aycliffe 11 km · Yarm 13 km · Stockton-on-Tees 16 km · Thornaby-on-Tees 16 km · Bishop Auckland 17 km · Billingham 18 km · Spennymoor 20 km · Middlesbrough 21 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 Darlington (54.5243°, -1.5504°, elevation 40 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).