Stratford weather in September

In September, Stratford sees average daytime highs of 73°F and overnight lows near 60°F, with 4.0 in of rain across 9.2 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 77°F in the first days to 69°F by the end. The sky is clear or mostly clear about 39% 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 Stratford's 2nd-clearest and 9th-windiest month. For the whole year in context, see Stratford's year-round climate.

Daytime high
73°
4th warmest
Overnight low
60°
9th coldest
Rainfall
4.0 in
9.2 wet days
Daylight
12 h 18 min
5:39 AM – 5:55 PM
Cloud cover
54%
2nd clearest
Wind
7 mph
9th windiest
Solar energy
4.27 kWh/m²
Travel score
6.9
out of 10

Stratford is town in Fairfield County, Connecticut, United States.

Founded
1639

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 77°F in the first days to 69°F by the end.

A typical September day in Stratford reaches about 73°F in the afternoon and slips back to 60°F overnight — a 13°F spread between the day's warmth and the night's chill. On most days the high lands between 65°F and 81°F. Set against its neighbours, September runs about 7°F cooler than August and about 11°F warmer than October.

40°50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
17864
27764
37764
47764
57664
67663
77663
87663
97562
107562
117562
127462
137461
147461
157360
167360
177360
187360
197259
207259
217158
227158
237158
247058
257057
267057
276956
286956
296856
306855

How September really feels in Stratford

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.

Stratford weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 26°3.89.55.19.40.0
Feb38° / 26°3.48.94.310.30.0
Mar45° / 33°4.510.73.511.71.1
Apr56° / 42°4.1110.513.13.7
May66° / 52°3.611.5014.35.8
Jun76° / 62°3.810.9014.96.6
Jul82° / 68°3.410.2014.76.4
Aug80° / 67°4.110.2013.66.6
Sep73° / 60°4.09.2012.36.9
Oct62° / 50°4.59.40.110.95.5
Nov51° / 40°3.790.69.72.7
Dec42° / 32°4.710.43.39.10.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25347
35347
45347
55248
65347
75347
85446
95446
105446
115545
125545
135545
145446
155446
165446
175446
185347
195248
205347
215248
225248
235248
245248
255248
265248
275347
285347
295347
305347

Chance of precipitation in September

Any precipitation

Stratford gets around 4.0 in of rain over 9.2 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 30% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
127
227
327
428
528
628
729
829
929
1030
1130
1230
1330
1430
1530
1630
1730
1830
1930
2030
2131
2231
2331
2431
2531
2631
2731
2831
2931
3031

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 39% of days. Sticky, muggy-or-worse air turns up on roughly 20% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1222325219
2232324219
3242324209
4252324199
5262324199
6272323188
7282423188
8292423187
9302422177
10312422176
11322421176
12332421176
13352320165
14362320165
15382319164
16392319154
17412219153
18422219153
19432218142
20452118142
21462118142
22482117132
23492017131
24512016121
25531916111
26531916111
27541916101
2855191691
2957181591
3058181581

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177light breeze
187light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light 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 5:23 AM to 5:53 AM, and sunset from 6:21 PM to 5:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:236:21
212.95:246:20
312.95:256:18
412.85:266:16
512.85:276:14
612.75:286:13
712.75:296:11
812.65:306:09
912.65:326:07
1012.65:336:06
1112.55:346:04
1212.55:356:02
1312.45:366:00
1412.45:375:59
1512.35:385:57
1612.35:395:55
1712.25:405:53
1812.25:415:51
1912.15:425:50
2012.15:435:48
2112.05:445:46
2212.05:455:44
2311.95:465:43
2411.95:475:41
2511.85:485:39
2611.85:495:37
2711.85:505:35
2811.75:515:34
2911.75:525:32
3011.65:535:30

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.27 kWh/m².

For context, solar energy here swings from a low near 1.71 kWh/m² to a high of 6.11 kWh/m² in June across the year — September's 4.27 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.8Bright
34.8Bright
44.8Bright
54.7Bright
64.7Bright
74.6Bright
84.6Bright
94.5Bright
104.5Bright
114.5Bright
124.4Bright
134.4Bright
144.3Bright
154.3Bright
164.3Bright
174.2Bright
184.2Bright
194.2Bright
204.1Bright
214.1Bright
224.0Bright
234.0Moderate
243.9Moderate
253.9Moderate
263.8Moderate
273.8Moderate
283.7Moderate
293.7Moderate
303.6Moderate
Planning a trip in September

Hazard calendar for Stratford

In seasonPeak

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

Stratford 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 Stratford?

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

6.9
Sightseeing
1st-best month of the year
5.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Stratford for sightseeing.

What to pack for Stratford in September

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

In September, Stratford sees daytime highs around 73°F and nights near 60°F. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

Sea temperature near Stratford in September

The nearest coast averages about 71°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 74°F and coldest in February near 35°F.

It's comfortable for a long swim from Jul 1 to Sep 30 — about 3 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan39Bracing
Feb35Bracing
Mar37Bracing
Apr44Bracing
May54Bracing
Jun65Cool
Jul72Refreshing
Aug74Refreshing
Sep71Refreshing
Oct64Cool
Nov55Bracing
Dec46Bracing

UV index in Stratford 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 Stratford peaks around July 11 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 23 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 11UV 8Dec 23UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May7Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Stratford 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 Stratford is worst in July — around 20 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (November, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateJul 1220 µg/m³Nov 1612 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb16Moderate
Mar17Moderate
Apr17Moderate
May18Moderate
Jun19Moderate
Jul20Moderate
Aug17Moderate
Sep16Moderate
Oct13Moderate
Nov11Good
Dec13Moderate
Location & terrain

Where is Stratford?

Stratford sits at 41.2°N, 73.1°W, 23 ft above sea level, in United States. The nearest listed city is Bridgeport, 3.1 mi away.

Topography around Stratford

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

Within 2 miles, the terrain around Stratford has only modest variations in elevation — a maximum elevation change of 187 ft around an average of 30 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 666 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,913 ft.

The land around Stratford is covered by artificial surfaces (35%) and trees (26%) within 2 miles, water (47%) and trees (38%) within 10 miles, and trees (56%) and water (32%) within 50 miles.

2 miles
187 ft
10 miles
666 ft
50 miles
1,913 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Bridgeport 3.1 mi · City of Milford (balance) 4.3 mi · Milford 5.0 mi · Trumbull 5.6 mi · Fairfield 7.5 mi · Shelton 9.3 mi · West Haven 11 mi · Ansonia 12 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 Stratford (41.1845°, -73.1332°, elevation 23 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).