Wallingford weather in September

In September, Wallingford sees average daytime highs of 74°F and overnight lows near 57°F, with 3.9 in of rain across 8.6 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 78°F in the first days to 70°F by the end. The sky is clear or mostly clear about 37% 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 Wallingford's 2nd-clearest and 9th-windiest month. For the whole year in context, see Wallingford's year-round climate.

Daytime high
74°
4th warmest
Overnight low
57°
9th coldest
Rainfall
3.9 in
8.6 wet days
Daylight
12 h 18 min
5:37 AM – 5:54 PM
Cloud cover
55%
2nd clearest
Wind
7 mph
9th windiest
Solar energy
4.29 kWh/m²
Travel score
7.0
out of 10

Wallingford is town in New Haven County, Connecticut, United States.

Founded
1667

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 78°F in the first days to 70°F by the end.

A typical September day in Wallingford reaches about 74°F in the afternoon and slips back to 57°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 66°F and 82°F. Set against its neighbours, September runs about 7°F cooler than August and about 11°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17962
27862
37861
47861
57861
67760
77760
87760
97660
107659
117659
127559
137558
147558
157458
167457
177457
187356
197356
207356
217255
227255
237155
247155
257154
267054
277053
286953
296953
306952

How September really feels in Wallingford

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.

Wallingford weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 23°3.49.55.49.30.0
Feb39° / 24°3.08.64.610.30.0
Mar47° / 31°4.110.53.611.71.5
Apr58° / 41°3.7110.613.14.2
May68° / 50°3.311.1014.36.0
Jun77° / 60°3.811.7014.96.4
Jul83° / 66°3.610.8014.75.7
Aug81° / 65°4.210.2013.76.4
Sep74° / 57°3.98.6012.37.0
Oct63° / 47°4.19.30.210.95.6
Nov52° / 37°3.48.40.89.72.8
Dec42° / 29°4.210.33.89.10.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15248
25149
35248
45149
55149
65248
75149
85248
95248
105248
115347
125347
135347
145248
155248
165248
175347
185248
195248
205248
215149
225149
235149
245149
255050
265149
275149
285149
295248
305248

Chance of precipitation in September

Any precipitation

Wallingford gets around 3.9 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 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
126
226
326
426
526
626
727
827
927
1027
1127
1227
1327
1427
1527
1627
1728
1828
1928
2029
2129
2229
2330
2430
2530
2630
2730
2830
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 45% of days. Sticky, muggy-or-worse air turns up on roughly 17% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1292322188
2302322188
3312321178
4312321177
5322321177
6332320177
7342320166
8352320166
9362319166
10382219165
11392218165
12402218164
13422118164
14432117153
15452117153
16462016153
17472016142
18482016142
19492015142
20502015132
21522014131
22541914121
23541914121
24561913111
25571913101
26581813101
2759181391
2860181381
2961181381
3064171270

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:22 AM to 5:52 AM, and sunset from 6:20 PM to 5:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:226:20
212.95:236:19
312.95:246:17
412.85:256:15
512.85:266:13
612.75:276:12
712.75:286:10
812.75:296:08
912.65:306:06
1012.65:316:05
1112.55:326:03
1212.55:336:01
1312.45:345:59
1412.45:355:57
1512.35:365:56
1612.35:375:54
1712.25:385:52
1812.25:405:50
1912.15:415:48
2012.15:425:47
2112.05:435:45
2212.05:445:43
2311.95:455:41
2411.95:465:39
2511.85:475:38
2611.85:485:36
2711.85:495:34
2811.75:505:32
2911.75:515:31
3011.65:525:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.29 kWh/m².

For context, solar energy here swings from a low near 1.71 kWh/m² to a high of 6.14 kWh/m² in June across the year — September's 4.29 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.8Bright
44.8Bright
54.7Bright
64.7Bright
74.7Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.5Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.1Bright
214.1Bright
224.0Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.7Moderate
303.7Moderate
Planning a trip in September

Hazard calendar for Wallingford

In seasonPeak

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

Wallingford 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 Wallingford?

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

7.0
Sightseeing
1st-best month of the year
5.5
Beach & pool
4th-best month of the year

September is one of the better times to visit Wallingford for general sightseeing.

What to pack for Wallingford in September

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

In September, Wallingford sees daytime highs around 74°F and nights near 57°F. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

Sea temperature near Wallingford 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 at the nearest coast (about 23 mi away) is warmest in August at about 73°F and coldest in February near 36°F.

It's comfortable for a long swim from Jul 4 to Sep 28 — about 2.9 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan39Bracing
Feb36Bracing
Mar37Bracing
Apr44Bracing
May54Bracing
Jun64Cool
Jul71Refreshing
Aug73Refreshing
Sep71Refreshing
Oct64Cool
Nov55Bracing
Dec46Bracing

UV index in Wallingford 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 Wallingford 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 11UV 8Dec 23UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May7Very high
Jun7Very high
Jul8Very high
Aug5High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Wallingford 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 Wallingford is worst in July — around 20 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (November, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1120 µg/m³Nov 188 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar14Moderate
Apr16Moderate
May19Moderate
Jun20Moderate
Jul20Moderate
Aug17Moderate
Sep13Moderate
Oct9Good
Nov8Good
Dec9Good
Location & terrain

Where is Wallingford?

Wallingford sits at 41.5°N, 72.8°W, 89 ft above sea level, in United States. The nearest listed city is Wallingford Center, 0.6 mi away.

Topography around Wallingford

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

Within 2 miles, the terrain around Wallingford has only modest variations in elevation — a maximum elevation change of 394 ft around an average of 167 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,037 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,923 ft.

The land around Wallingford is covered by trees (67%) within 2 miles, trees (79%) within 10 miles, and trees (68%) and water (22%) within 50 miles.

2 miles
394 ft
10 miles
1,037 ft
50 miles
1,923 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Wallingford Center 0.6 mi · North Haven 5.0 mi · Cheshire 5.0 mi · Meriden 5.6 mi · Hamden 5.6 mi · Southington 9.9 mi · Middletown 12 mi · New Haven 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 Wallingford (41.457°, -72.8232°, elevation 89 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).