Newmarket weather in September

In September, Newmarket sees average daytime highs of 18°C and overnight lows near 11°C, with 52 mm of rain across 9.3 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 Newmarket's 5th-clearest and 9th-windiest month. For the whole year in context, see Newmarket's year-round climate.

Daytime high
18°
4th warmest
Overnight low
11°
9th coldest
Rainfall
52 mm
9.3 wet days
Daylight
12 h 24 min
5:41 AM – 6:05 PM
Cloud cover
70%
5th clearest
Wind
15 km/h
9th windiest
Solar energy
2.98 kWh/m²
Travel score
5.8
out of 10

Newmarket is market town in Suffolk, England.

Density
1,391/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 17°C by the end.

A typical September day in Newmarket 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
32012
41912
51912
61912
71912
81911
91911
101911
111911
121911
131911
141811
151811
161811
171811
181811
191811
201811
211811
221811
231710
241710
251710
261710
271710
281710
291710
301710

How September really feels in Newmarket

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.

Newmarket 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 / 5211.60.980.8
Feb / 429.71.49.51.1
Mar10° / 4310.70.811.52.2
Apr13° / 48110.113.63.4
May16° / 5510.2015.44.8
Jun19° / 11°6211.2016.45.7
Jul21° / 13°60120166.1
Aug21° / 13°6511014.56.2
Sep18° / 11°529.3012.45.8
Oct14° / 5910.8010.34.0
Nov10° / 5610.80.28.52.2
Dec / 5511.20.97.61.0

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 19% of September, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13466
23466
33565
43664
53664
63664
73664
83664
93565
103565
113565
123565
133466
143466
153466
163268
173268
183268
193169
203169
213169
223169
232971
242872
252872
262971
272971
282971
292971
302971

Chance of precipitation in September

Any precipitation

Newmarket gets around 52 mm of rain over 9.3 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 36% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
130
229
329
429
529
629
729
829
930
1030
1130
1230
1331
1431
1531
1631
1731
1832
1932
2032
2132
2233
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 76% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
168284
269274
369274
470264
571254
671254
772244
873234
973234
1074224
1175214
1275214
1376204
1477203
1578193
1678193
1778193
1879192
1978202
2078202
2179201
2279201
2379201
2479201
2580200
2680200
2781190
2882180
2982180
3083170

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
515light breeze
615light breeze
715light breeze
815light 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 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 5:15 AM to 6:05 AM, and sunset from 6:41 PM to 5:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:156:41
213.45:176:39
313.35:196:36
413.25:206:34
513.25:226:31
613.15:246:29
713.05:256:27
813.05:276:24
912.95:296:22
1012.85:316:19
1112.75:326:17
1212.75:346:14
1312.65:366:12
1412.55:376:10
1512.55:396:07
1612.45:416:05
1712.35:426:02
1812.35:446:00
1912.25:465:57
2012.15:485:55
2112.15:495:52
2212.05:515:50
2311.95:535:48
2411.85:545:45
2511.85:565:43
2611.75:585:40
2711.66:005:38
2811.66:015:35
2911.56:035:33
3011.46:055:31

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.98 kWh/m².

For context, solar energy here swings from a low near 0.61 kWh/m² to a high of 5.21 kWh/m² in June across the year — September's 2.98 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.5Moderate
33.5Moderate
43.5Moderate
53.4Moderate
63.4Moderate
73.3Moderate
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
302.4Moderate
Planning a trip in September

Is September a good time to visit Newmarket?

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

5.8
Sightseeing
3rd-best month of the year
2.1
Beach & pool
4th-best month of the year

September is a reasonable time to visit Newmarket for sightseeing.

What to pack for Newmarket in September

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

In September, Newmarket sees daytime highs around 18°C and nights near 11°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Newmarket in September

The nearest coast averages about 16°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 70 km away) is warmest in August at about 18°C and coldest in February near 5°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
Jan6Bracing
Feb5Bracing
Mar6Bracing
Apr8Bracing
May11Bracing
Jun14Bracing
Jul17Cool
Aug18Cool
Sep16Cool
Oct13Bracing
Nov10Bracing
Dec7Bracing

UV index in Newmarket 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 Newmarket peaks around August 10 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 21 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 10UV 6Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr3Moderate
May6High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Newmarket?

Newmarket sits at 52.2°N, 0.4°E, 28 m above sea level, in United Kingdom. The nearest listed city is Haverhill, 18 km away.

Topography around Newmarket

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

Within 3 km, the terrain around Newmarket has only modest variations in elevation — a maximum elevation change of 97 m around an average of 45 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 148 m; within 80 km, significant variations in elevation — a maximum elevation change of 277 m.

The land around Newmarket is covered by grassland (60%) within 3 km, cropland (59%) and grassland (25%) within 16 km, and cropland (57%) within 80 km.

3 km
97 m
16 km
148 m
80 km
277 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Haverhill 18 km · Ely 20 km · Cambridge 20 km · Bury St Edmunds 21 km · Saffron Walden 27 km · Thetford 30 km · Sudbury 32 km · Saint Ives 34 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 Newmarket (52.2447°, 0.4042°, elevation 28 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).