East Hartford weather in September

In September, East Hartford sees average daytime highs of 74°F and overnight lows near 56°F, with 3.8 in of rain across 8.7 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 69°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 East Hartford's 2nd-clearest and 9th-windiest month. For the whole year in context, see East Hartford's year-round climate.

Daytime high
74°
4th warmest
Overnight low
56°
9th coldest
Rainfall
3.8 in
8.7 wet days
Daylight
12 h 18 min
5:36 AM – 5:53 PM
Cloud cover
55%
2nd clearest
Wind
6 mph
9th windiest
Solar energy
4.19 kWh/m²
Travel score
7.0
out of 10

East Hartford is town in Hartford County, Connecticut, United States.

Density
1,057/km²
people per km²
Founded
1783

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 69°F by the end.

A typical September day in East Hartford reaches about 74°F in the afternoon and slips back to 56°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 65°F and 83°F. Set against its neighbours, September runs about 7°F cooler than August and about 12°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17960
27860
37860
47860
57859
67759
77759
87758
97658
107658
117657
127557
137557
147456
157456
167456
177355
187355
197355
207254
217254
227253
237153
247153
257152
267052
277052
286951
296951
306851

How September really feels in East Hartford

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.

East Hartford 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
Jan36° / 22°3.39.75.69.30.0
Feb38° / 23°3.08.7510.30.0
Mar46° / 30°4.110.5411.71.4
Apr58° / 40°3.510.90.913.14.3
May68° / 50°3.210.8014.36.1
Jun78° / 59°3.711.50156.5
Jul83° / 65°3.410.4014.75.7
Aug81° / 63°3.910013.76.4
Sep74° / 56°3.88.7012.37.0
Oct62° / 45°4.09.30.210.95.4
Nov51° / 35°3.38.70.99.62.5
Dec41° / 27°4.110.24.390.2

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 14% of September, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25347
35347
45347
55248
65248
75347
85347
95347
105347
115347
125347
135347
145347
155248
165248
175248
185248
195149
205149
215149
225149
235050
245050
255050
265050
275050
285050
295149
305248

Chance of precipitation in September

Any precipitation

East Hartford gets around 3.8 in of rain over 8.7 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
327
427
527
627
728
828
928
1028
1129
1229
1328
1428
1528
1628
1728
1828
1928
2029
2129
2229
2329
2429
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 49% of days. Sticky, muggy-or-worse air turns up on roughly 14% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1332421165
2342421165
3352321165
4362321155
5372321155
6382220155
7392220144
8402220144
9412120144
10422120144
11432119143
12442019133
13462018133
14472018132
15482017132
16501917122
17511916122
18531916111
19541915111
20551815111
21571814101
22571814101
23581813101
2459181391
2562171281
2663171280
2764171270
2865161270
2967161160
3067161160

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 6 mph on the calmest days to 6 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
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 5:21 AM to 5:52 AM, and sunset from 6:20 PM to 5:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:216:20
212.95:226:18
312.95:236:16
412.85:246:15
512.85:256:13
612.85:266:11
712.75:276:09
812.75:286:07
912.65:296:06
1012.65:306:04
1112.55:316:02
1212.55:326:00
1312.45:335:58
1412.45:345:57
1512.35:355:55
1612.35:365:53
1712.25:385:51
1812.25:395:49
1912.15:405:48
2012.15:415:46
2112.05:425:44
2212.05:435:42
2311.95:445:40
2411.95:455:39
2511.85:465:37
2611.85:475:35
2711.75:485:33
2811.75:495:31
2911.75:515:30
3011.65:525:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.19 kWh/m².

For context, solar energy here swings from a low near 1.68 kWh/m² to a high of 5.96 kWh/m² in June across the year — September's 4.19 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.7Bright
34.7Bright
44.7Bright
54.6Bright
64.6Bright
74.5Bright
84.5Bright
94.5Bright
104.4Bright
114.4Bright
124.3Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.2Bright
184.1Bright
194.1Bright
204.0Bright
214.0Bright
224.0Moderate
233.9Moderate
243.9Moderate
253.8Moderate
263.8Moderate
273.7Moderate
283.7Moderate
293.6Moderate
303.6Moderate
Planning a trip in September

Hazard calendar for East Hartford

In seasonPeak

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

East Hartford 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 East Hartford?

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
5.4
Beach & pool
4th-best month of the year

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

What to pack for East Hartford in September

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

In September, East Hartford sees daytime highs around 74°F and nights near 56°F. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in East Hartford 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 East Hartford 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 East Hartford 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 East Hartford is worst in July — around 15 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1615 µg/m³Nov 197 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar12Good
Apr12Good
May13Moderate
Jun14Moderate
Jul15Moderate
Aug13Moderate
Sep11Good
Oct9Good
Nov7Good
Dec8Good
Location & terrain

Where is East Hartford?

East Hartford sits at 41.8°N, 72.6°W, 52 ft above sea level, in United States. The nearest listed city is South Windsor, 3.1 mi away.

Topography around East Hartford

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

Within 2 miles, the terrain around East Hartford has only modest variations in elevation — a maximum elevation change of 295 ft around an average of 82 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 955 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,579 ft.

The land around East Hartford is covered by trees (54%) and artificial surfaces (22%) within 2 miles, trees (69%) within 10 miles, and trees (81%) within 50 miles.

2 miles
295 ft
10 miles
955 ft
50 miles
2,579 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: South Windsor 3.1 mi · Hartford 3.7 mi · Manchester 5.0 mi · Glastonbury 5.0 mi · Windsor 5.0 mi · Wethersfield 5.0 mi · Bloomfield 6.8 mi · West Hartford 6.8 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 East Hartford (41.7823°, -72.612°, elevation 52 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). 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).