Waterford weather in September

In September, Waterford sees average daytime highs of 70°F and overnight lows near 62°F, with 4.2 in of rain across 8.6 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 73°F in the first days to 67°F by the end. The sky is clear or mostly clear about 43% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Waterford's 2nd-clearest and 8th-windiest month. For the whole year in context, see Waterford's year-round climate.

Daytime high
70°
3rd warmest
Overnight low
62°
10th coldest
Rainfall
4.2 in
8.6 wet days
Daylight
12 h 18 min
5:35 AM – 5:51 PM
Cloud cover
52%
2nd clearest
Wind
11 mph
8th windiest
Solar energy
4.42 kWh/m²
Travel score
6.8
out of 10

Waterford is town in New London County, Connecticut, United States.

Founded
1801

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 73°F in the first days to 67°F by the end.

A typical September day in Waterford reaches about 70°F in the afternoon and slips back to 62°F overnight — a 7°F spread between the day's warmth and the night's chill. On most days the high lands between 65°F and 75°F. Set against its neighbours, September runs about 5°F cooler than August and about 9°F warmer than October.

50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
17366
27366
37365
47365
57265
67265
77265
87264
97264
107164
117164
127164
137163
147063
157063
167062
177062
186962
196962
206961
216961
226861
236860
246860
256760
266760
276759
286759
296659
306658

How September really feels in Waterford

Once humidity and wind are folded in, September averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
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.

Waterford weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan38° / 29°3.910.34.79.40.0
Feb38° / 29°3.59.13.910.30.0
Mar43° / 34°4.710.53.511.70.4
Apr51° / 43°4.210.80.513.12.4
May59° / 51°3.510.6014.34.4
Jun68° / 61°3.79.7014.96.3
Jul75° / 68°3.18.9014.77.2
Aug75° / 68°3.89.2013.77.2
Sep70° / 62°4.28.6012.36.8
Oct61° / 53°4.79.70.110.95.2
Nov52° / 43°4.19.40.59.72.8
Dec44° / 35°4.911.42.89.10.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35743
45743
55743
65743
75743
85743
95842
105842
115842
125743
135842
145842
155743
165743
175644
185644
195545
205545
215446
225446
235446
245446
255446
265446
275446
285545
295545
305545

Chance of precipitation in September

Any precipitation

Waterford gets around 4.2 in of rain over 8.6 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 28% and peaks near 33% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
124
224
325
425
525
626
726
826
927
1027
1127
1227
1327
1427
1528
1628
1728
1828
1929
2029
2129
2230
2330
2431
2531
2632
2732
2833
2933
3033

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1142228279
2152228278
3162227268
4172227268
5182227257
6202226257
7212226246
8222225246
9242225245
10252225245
11262224234
12282124234
13292123233
14312123223
15322123213
16332122212
17352122202
18362122201
19372122191
20382122181
21392121181
22402121171
23412220160
24432220150
25442220140
26452219140
27472119130
28482119120
29502118110
30512118100

Wind in September

Winds average 11 mph in September.

Across September, daily wind ranges from about 10 mph on the calmest days to 12 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
811light breeze
911light breeze
1011light breeze
1111light breeze
1211light breeze
1311light breeze
1411light breeze
1511light breeze
1611light breeze
1711light breeze
1811light breeze
1911light breeze
2011light breeze
2111light breeze
2211light breeze
2311light breeze
2411light breeze
2511light breeze
2611light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over September. Sunrise moves from 5:19 AM to 5:50 AM, and sunset from 6:17 PM to 5:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:196:17
212.95:206:16
312.95:216:14
412.85:226:12
512.85:236:10
612.75:246:09
712.75:256:07
812.65:266:05
912.65:276:03
1012.65:286:02
1112.55:306:00
1212.55:315:58
1312.45:325:56
1412.45:335:55
1512.35:345:53
1612.35:355:51
1712.25:365:49
1812.25:375:47
1912.15:385:46
2012.15:395:44
2112.05:405:42
2212.05:415:40
2311.95:425:39
2411.95:435:37
2511.85:445:35
2611.85:455:33
2711.85:465:31
2811.75:475:30
2911.75:485:28
3011.65:505:26

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.42 kWh/m².

For context, solar energy here swings from a low near 1.7 kWh/m² to a high of 6.33 kWh/m² in June across the year — September's 4.42 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.0Bright
35.0Bright
44.9Bright
54.9Bright
64.8Bright
74.8Bright
84.8Bright
94.7Bright
104.7Bright
114.6Bright
124.6Bright
134.5Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.3Bright
214.2Bright
224.2Bright
234.1Bright
244.1Bright
254.0Bright
264.0Moderate
273.9Moderate
283.9Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Waterford

In seasonPeak

In September, Waterford sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Waterford sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Waterford?

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

6.8
Sightseeing
3rd-best month of the year
4.2
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Waterford for sightseeing.

What to pack for Waterford in September

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

In September, Waterford sees daytime highs around 70°F and nights near 62°F. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Waterford in September

The nearest coast averages about 68°F 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 15 mi away) is warmest in August at about 71°F and coldest in February near 39°F.

It's comfortable for a long swim from Jul 15 to Sep 15 — about 2.1 months when the water holds above 68°F.

40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan42Bracing
Feb39Bracing
Mar39Bracing
Apr44Bracing
May52Bracing
Jun61Cool
Jul69Refreshing
Aug71Refreshing
Sep68Refreshing
Oct63Cool
Nov55Bracing
Dec48Bracing

UV index in Waterford in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Waterford peaks around July 10 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 10UV 8Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Waterford in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Waterford is worst in July — around 15 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (November, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1515 µg/m³Nov 206 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb10Good
Mar11Good
Apr12Good
May14Moderate
Jun14Moderate
Jul15Moderate
Aug13Moderate
Sep10Good
Oct7Good
Nov6Good
Dec6Good
Location & terrain

Where is Waterford?

Waterford sits at 41.3°N, 72.1°W, 30 ft above sea level, in United States. The nearest listed city is New London, 1.9 mi away.

Topography around Waterford

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Waterford.

Within 2 miles, the terrain around Waterford has only modest variations in elevation — a maximum elevation change of 282 ft around an average of 102 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 656 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,325 ft.

The land around Waterford is covered by trees (73%) within 2 miles, trees (52%) and water (39%) within 10 miles, and trees (49%) and water (44%) within 50 miles.

2 miles
282 ft
10 miles
656 ft
50 miles
1,325 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: New London 1.9 mi · Ledyard 9.3 mi · Montville Center 9.3 mi · Norwich 13 mi · Westerly 16 mi · Madison 24 mi · Windham 25 mi · Willimantic 25 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 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 Waterford (41.3417°, -72.136°, elevation 30 ft), 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).