Newtownards weather in September

In September, Newtownards sees average daytime highs of 15°C and overnight lows near 11°C, with 76 mm of rain across 13.2 wet days and about 12.5 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 16°C in the first days to 14°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 Newtownards's 9th-clearest and 8th-windiest month. For the whole year in context, see Newtownards's year-round climate.

Daytime high
15°
3rd warmest
Overnight low
11°
10th coldest
Rainfall
76 mm
13.2 wet days
Daylight
12 h 24 min
6:04 AM – 6:30 PM
Cloud cover
75%
9th clearest
Wind
18 km/h
8th windiest
Solar energy
2.71 kWh/m²
Travel score
4.2
out of 10

Newtownards is town in County Down, Northern Ireland, UK.

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 16°C in the first days to 14°C by the end.

A typical September day in Newtownards reaches about 15°C in the afternoon and slips back to 11°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 17°C. Set against its neighbours, September runs about 1°C cooler than August and about 3°C warmer than October.

10°15°20°151015202530
Avg high (°C)Avg low (°C)
11612
21612
31612
41612
51612
61612
71612
81612
91612
101612
111612
121612
131612
141611
151511
161511
171511
181511
191511
201511
211511
221511
231511
241511
251511
261511
271511
281511
291411
301411

How September really feels in Newtownards

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.

Newtownards weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 8615.30.57.61.1
Feb / 68130.89.31.1
Mar / 6613.80.511.51.5
Apr11° / 6412.90.113.72.3
May13° / 6913.8015.83.2
Jun15° / 11°7412.9016.94.1
Jul17° / 12°8214.5016.44.6
Aug17° / 13°8214.3014.74.7
Sep15° / 11°7613.2012.54.2
Oct13° / 9714.3010.23.1
Nov10° / 9715.10.28.22.0
Dec / 9314.70.37.11.3

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 16% of September, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12773
22773
32773
42773
52773
62773
72773
82674
92674
102674
112674
122773
132773
142773
152674
162773
172773
182773
192674
202674
212674
222674
232575
242575
252575
262575
272674
282575
292575
302575

Chance of precipitation in September

Any precipitation

Newtownards gets around 76 mm of rain over 13.2 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 44% and peaks near 47% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
141
241
342
442
543
643
744
844
944
1044
1144
1244
1344
1444
1543
1643
1743
1842
1942
2042
2142
2243
2343
2444
2544
2645
2746
2846
2947
3047

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 85% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
178211
278211
379201
479201
579201
680191
780191
881181
982171
1083161
1183161
1285150
1386140
1486140
1587130
1687130
1787130
1887130
1988120
2088120
2188120
2288120
2388120
2488120
2589110
2689110
2789110
2890100
2990100
309190

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 17 km/h on the calmest days to 19 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
918light breeze
1018light breeze
1118light 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
2719light breeze
2819light breeze
2919light breeze
3019light 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 5:36 AM to 6:31 AM, and sunset from 7:09 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:367:09
213.55:387:07
313.45:397:04
413.35:417:02
513.35:436:59
613.25:456:56
713.15:476:54
813.05:496:51
913.05:516:49
1012.95:536:46
1112.85:556:43
1212.75:566:41
1312.75:586:38
1412.66:006:35
1512.56:026:33
1612.46:046:30
1712.46:066:27
1812.36:086:25
1912.26:106:22
2012.16:126:20
2112.16:146:17
2212.06:156:14
2311.96:176:12
2411.86:196:09
2511.86:216:06
2611.76:236:04
2711.66:256:01
2811.56:275:59
2911.56:295:56
3011.46:315:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.71 kWh/m².

For context, solar energy here swings from a low near 0.48 kWh/m² to a high of 4.97 kWh/m² in May across the year — September's 2.71 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.3Moderate
23.2Moderate
33.2Moderate
43.1Moderate
53.1Moderate
63.1Moderate
73.0Moderate
83.0Moderate
93.0Moderate
102.9Moderate
112.9Moderate
122.9Moderate
132.8Moderate
142.8Moderate
152.8Moderate
162.7Moderate
172.7Moderate
182.6Moderate
192.6Moderate
202.6Moderate
212.5Moderate
222.5Moderate
232.4Moderate
242.4Moderate
252.4Moderate
262.3Moderate
272.3Moderate
282.2Moderate
292.2Moderate
302.1Moderate
Planning a trip in September

Is September a good time to visit Newtownards?

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

4.2
Sightseeing
3rd-best month of the year
Beach & pool
never really warm enough

September is a reasonable time to visit Newtownards for sightseeing.

What to pack for Newtownards in September

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

In September, Newtownards sees daytime highs around 15°C and nights near 11°C. Worth packing: a warm layer and rain gear. About 13 days see rain.

a warm layerrain gear

Sea temperature near Newtownards 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 21 km away) is warmest in August at about 14°C and coldest in March near 8°C.

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

6°8°10°12°14°16°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr8Bracing
May10Bracing
Jun12Bracing
Jul13Bracing
Aug14Bracing
Sep14Bracing
Oct14Bracing
Nov12Bracing
Dec11Bracing

UV index in Newtownards 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 Newtownards peaks around July 24 at about 5 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 5 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 24UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5High
Jun5High
Jul5High
Aug5High
Sep3Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Newtownards?

Newtownards sits at 54.6°N, 5.7°W, 9 m above sea level, in United Kingdom. The nearest listed city is Bangor, 8.0 km away.

Topography around Newtownards

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

Within 3 km, the terrain around Newtownards has only modest variations in elevation — a maximum elevation change of 152 m around an average of 42 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 235 m; within 80 km, large variations in elevation — a maximum elevation change of 860 m.

The land around Newtownards is covered by grassland (43%) within 3 km, grassland (38%) and water (38%) within 16 km, and water (52%) and grassland (41%) within 80 km.

3 km
152 m
16 km
235 m
80 km
860 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Bangor 8.0 km · Castlereagh 13 km · Belfast 15 km · Carrickfergus 16 km · Newtownabbey 16 km · Lisburn 23 km · Larne 30 km · Antrim 36 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 Newtownards (54.5924°, -5.6909°, elevation 9 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).