Stowmarket weather in September

In September, Stowmarket sees average daytime highs of 18°C and overnight lows near 11°C, with 51 mm of rain across 9.8 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 19°C in the first days to 17°C by the end. The sky is clear or mostly clear about 14% 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 24 min by month's end. Set against the rest of the year, September is Stowmarket's 5th-clearest and 9th-windiest month. For the whole year in context, see Stowmarket's year-round climate.

Daytime high
18°
4th warmest
Overnight low
11°
10th coldest
Rainfall
51 mm
9.8 wet days
Daylight
12 h 24 min
5:38 AM – 6:02 PM
Cloud cover
69%
5th clearest
Wind
14 km/h
9th windiest
Solar energy
3.07 kWh/m²
Travel score
5.7
out of 10

Stowmarket is town and civil parish in Mid Suffolk, Suffolk, England.

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 17°C by the end.

A typical September day in Stowmarket 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
31912
41912
51912
61912
71912
81912
91912
101912
111911
121911
131811
141811
151811
161811
171811
181811
191811
201811
211811
221711
231711
241711
251710
261710
271710
281710
291710
301610

How September really feels in Stowmarket

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.

Stowmarket weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 5011.50.980.8
Feb / 419.81.29.51.0
Mar10° / 4310.60.711.52.1
Apr13° / 4710.80.113.63.3
May16° / 5410.7015.44.7
Jun19° / 11°5910.7016.45.7
Jul21° / 13°60120166.1
Aug21° / 13°6510.9014.56.2
Sep18° / 11°519.8012.45.7
Oct14° / 5810.7010.34.0
Nov10° / 5410.50.28.52.2
Dec / 541117.61.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23664
33664
43763
53862
63862
73862
83763
93763
103664
113664
123664
133664
143565
153466
163367
173367
183367
193367
203268
213268
223268
233268
243268
253268
263169
273169
283169
293169
303169

Chance of precipitation in September

Any precipitation

Stowmarket gets around 51 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. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
129
229
329
429
529
629
730
830
931
1031
1131
1232
1332
1432
1532
1633
1733
1833
1934
2034
2134
2235
2335
2435
2535
2636
2736
2836
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 74% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
166304
266304
366304
467294
567294
668284
767285
868275
968275
1069265
1171254
1272244
1372244
1473234
1574224
1675223
1776213
1876213
1977212
2077212
2177212
2278211
2378211
2478211
2578211
2680200
2781190
2881190
2982180
3082180

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
714light breeze
814light breeze
914light 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 24 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 120 minutes over September. Sunrise moves from 5:13 AM to 6:02 AM, and sunset from 6:39 PM to 5:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:136:39
213.45:156:36
313.35:166:34
413.25:186:31
513.25:206:29
613.15:216:27
713.05:236:24
812.95:256:22
912.95:266:19
1012.85:286:17
1112.75:306:14
1212.75:326:12
1312.65:336:10
1412.55:356:07
1512.55:376:05
1612.45:386:02
1712.35:406:00
1812.35:425:57
1912.25:435:55
2012.15:455:52
2112.15:475:50
2212.05:495:48
2311.95:505:45
2411.85:525:43
2511.85:545:40
2611.75:565:38
2711.65:575:35
2811.65:595:33
2911.56:015:31
3011.46:025:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.07 kWh/m².

For context, solar energy here swings from a low near 0.61 kWh/m² to a high of 5.4 kWh/m² in June across the year — September's 3.07 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.6Moderate
33.6Moderate
43.6Moderate
53.5Moderate
63.5Moderate
73.4Moderate
83.4Moderate
93.4Moderate
103.3Moderate
113.3Moderate
123.2Moderate
133.2Moderate
143.1Moderate
153.1Moderate
163.0Moderate
173.0Moderate
183.0Moderate
192.9Moderate
202.9Moderate
212.8Moderate
222.8Moderate
232.7Moderate
242.7Moderate
252.6Moderate
262.6Moderate
272.6Moderate
282.5Moderate
292.5Moderate
302.4Moderate
Planning a trip in September

Is September a good time to visit Stowmarket?

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

5.7
Sightseeing
3rd-best month of the year
2.0
Beach & pool
4th-best month of the year

September is a reasonable time to visit Stowmarket for sightseeing.

What to pack for Stowmarket in September

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

In September, Stowmarket 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 Stowmarket 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 43 km away) is warmest in August at about 18°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°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan7Bracing
Feb6Bracing
Mar7Bracing
Apr8Bracing
May11Bracing
Jun14Bracing
Jul17Cool
Aug18Cool
Sep17Cool
Oct15Cool
Nov12Bracing
Dec9Bracing

UV index in Stowmarket 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 Stowmarket peaks around June 23 at about 6 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 23UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr3Moderate
May6High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Stowmarket?

Stowmarket sits at 52.2°N, 1.0°E, 32 m above sea level, in United Kingdom. The nearest listed city is Ipswich, 18 km away.

Topography around Stowmarket

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

Within 3 km, the terrain around Stowmarket has only modest variations in elevation — a maximum elevation change of 53 m around an average of 47 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 111 m; within 80 km, only modest variations in elevation — a maximum elevation change of 177 m.

The land around Stowmarket is covered by cropland (50%) within 3 km, cropland (67%) within 16 km, and cropland (48%) and water (23%) within 80 km.

3 km
53 m
16 km
111 m
80 km
177 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Ipswich 18 km · Bury St Edmunds 21 km · Sudbury 25 km · Thetford 30 km · Harwich 34 km · Colchester 34 km · Felixstowe 35 km · Haverhill 40 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 Stowmarket (52.1889°, 0.9977°, elevation 32 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).