Barnstaple weather in September

In September, Barnstaple sees average daytime highs of 17°C and overnight lows near 11°C, with 61 mm of rain across 11.1 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 18°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 24 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Barnstaple's 5th-clearest and 8th-windiest month. For the whole year in context, see Barnstaple's year-round climate.

Daytime high
17°
4th warmest
Overnight low
11°
10th coldest
Rainfall
61 mm
11.1 wet days
Daylight
12 h 24 min
5:59 AM – 6:22 PM
Cloud cover
71%
5th clearest
Wind
17 km/h
8th windiest
Solar energy
3.11 kWh/m²
Travel score
5.0
out of 10

Barnstaple is town and civil parish in Devon, England.

Air quality
Good
PM2.5 8.1 µg/m³ · 2019
Density
3,638/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 16°C by the end.

A typical September day in Barnstaple reaches about 17°C in the afternoon and slips back to 11°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 20°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11812
21812
31812
41812
51812
61812
71712
81712
91712
101712
111712
121711
131711
141711
151711
161711
171711
181711
191711
201611
211611
221611
231611
241611
251611
261611
271611
281611
291611
301510

How September really feels in Barnstaple

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.

Barnstaple weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 7914.50.88.21.1
Feb / 6511.80.79.61.2
Mar / 6312.80.511.51.8
Apr12° / 6311.90.113.52.9
May14° / 6312.2015.33.9
Jun17° / 11°6511.9016.25.0
Jul19° / 13°6712.6015.95.6
Aug19° / 13°7112.8014.45.5
Sep17° / 11°6111.1012.45.0
Oct14° / 8414.2010.43.5
Nov11° / 8815.208.72.1
Dec / 9514.60.37.81.3

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 69%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13169
23169
33169
43169
53268
63169
73169
83169
93169
103268
113268
123268
133169
143268
153268
163268
173268
183268
193268
203268
213268
223169
233070
242971
252971
262872
272773
282773
292674
302674

Chance of precipitation in September

Any precipitation

Barnstaple gets around 61 mm of rain over 11.1 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 37% and peaks near 44% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
135
235
335
435
535
635
735
835
935
1035
1135
1235
1335
1435
1536
1636
1736
1836
1937
2037
2138
2238
2339
2440
2541
2642
2743
2843
2944
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 72% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
157394
259383
361363
462353
563343
664333
765323
867303
968293
1069283
1171263
1272253
1373243
1474233
1575223
1676222
1777212
1877212
1977212
2077212
2178211
2278211
2378211
2478211
2578211
2679201
2779201
2880191
2981181
3081181

Wind in September

Winds average 17 km/h in September.

Across September, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light 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
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2918light breeze
3018light breeze

Sunrise & sunset in September

DaylightNight

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

Days shrink by about 114 minutes over September. Sunrise moves from 5:35 AM to 6:22 AM, and sunset from 6:57 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:356:57
213.35:366:55
313.25:386:52
413.25:406:50
513.15:416:48
613.05:436:46
713.05:456:43
812.95:466:41
912.85:486:39
1012.85:496:36
1112.75:516:34
1212.65:536:31
1312.65:546:29
1412.55:566:27
1512.45:576:24
1612.45:596:22
1712.36:016:20
1812.26:026:17
1912.26:046:15
2012.16:066:13
2112.06:076:10
2212.06:096:08
2311.96:106:05
2411.96:126:03
2511.86:146:01
2611.76:155:58
2711.76:175:56
2811.66:195:54
2911.56:205:51
3011.56:225:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.11 kWh/m².

For context, solar energy here swings from a low near 0.67 kWh/m² to a high of 5.43 kWh/m² in June across the year — September's 3.11 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.7Moderate
33.6Moderate
43.6Moderate
53.6Moderate
63.5Moderate
73.5Moderate
83.5Moderate
93.4Moderate
103.4Moderate
113.3Moderate
123.3Moderate
133.3Moderate
143.2Moderate
153.2Moderate
163.1Moderate
173.1Moderate
183.0Moderate
193.0Moderate
202.9Moderate
212.9Moderate
222.8Moderate
232.8Moderate
242.7Moderate
252.7Moderate
262.6Moderate
272.6Moderate
282.5Moderate
292.5Moderate
302.4Moderate
Planning a trip in September

Is September a good time to visit Barnstaple?

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
1.1
Beach & pool
4th-best month of the year

September is a reasonable time to visit Barnstaple for sightseeing.

What to pack for Barnstaple in September

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

In September, Barnstaple sees daytime highs around 17°C and nights near 11°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Barnstaple 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 at the nearest coast (about 23 km away) is warmest in August at about 17°C and coldest in February near 8°C.

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

10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr9Bracing
May11Bracing
Jun14Bracing
Jul16Cool
Aug17Cool
Sep17Cool
Oct15Cool
Nov13Bracing
Dec11Bracing

UV index in Barnstaple 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 Barnstaple peaks around August 13 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. 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 13UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul6High
Aug7High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Barnstaple?

Barnstaple sits at 51.1°N, 4.1°W, 12 m above sea level, in United Kingdom. The nearest listed city is Bideford, 13 km away.

Topography around Barnstaple

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

Within 3 km, the terrain around Barnstaple has only modest variations in elevation — a maximum elevation change of 156 m around an average of 44 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 475 m; within 80 km, large variations in elevation — a maximum elevation change of 652 m.

The land around Barnstaple is covered by grassland (47%) and trees (24%) within 3 km, grassland (60%) within 16 km, and water (42%) and grassland (38%) within 80 km.

3 km
156 m
16 km
475 m
80 km
652 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Bideford 13 km · Tiverton 44 km · Porthcawl 51 km · Exeter 54 km · Heavitree 56 km · Bridgend 58 km · Coity 60 km · Swansea 61 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 Barnstaple (51.0802°, -4.0581°, elevation 12 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).