Easthampton weather in September

In September, Easthampton sees average daytime highs of 72°F and overnight lows near 54°F, with 4.2 in of rain across 8.8 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 76°F in the first days to 67°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 Easthampton's 1st-clearest and 9th-windiest month. For the whole year in context, see Easthampton's year-round climate.

Daytime high
72°
4th warmest
Overnight low
54°
9th coldest
Rainfall
4.2 in
8.8 wet days
Daylight
12 h 18 min
5:37 AM – 5:53 PM
Cloud cover
56%
1st clearest
Wind
6 mph
9th windiest
Solar energy
4.15 kWh/m²
Travel score
6.9
out of 10

Easthampton is city in Massachusetts, United States of America.

Founded
1664

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 76°F in the first days to 67°F by the end.

A typical September day in Easthampton reaches about 72°F in the afternoon and slips back to 54°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 81°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)
17759
27758
37658
47658
57658
67557
77557
87557
97456
107456
117456
127355
137355
147355
157254
167254
177253
187153
197153
207152
217052
227052
236951
246951
256951
266850
276850
286749
296749
306649

How September really feels in Easthampton

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.

Easthampton weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan33° / 19°3.59.66.69.30.0
Feb36° / 20°3.28.96.110.30.0
Mar44° / 28°4.210.95.311.60.8
Apr57° / 39°4.011.31.613.13.8
May67° / 48°3.711.7014.45.9
Jun76° / 58°4.111.70156.4
Jul81° / 63°4.010.8014.86.3
Aug79° / 61°4.110.2013.76.6
Sep72° / 54°4.28.8012.36.9
Oct60° / 43°4.69.50.410.84.9
Nov48° / 33°3.59.21.79.61.9
Dec38° / 25°4.410.45.590.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in September, the clearest month of the year.

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
65149
75149
85149
95248
105248
115248
125248
135347
145347
155446
165446
175446
185446
195446
205347
215347
225347
235347
245248
255248
265248
275248
285248
295248
305248

Chance of precipitation in September

Any precipitation

Easthampton gets around 4.2 in of rain over 8.8 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 29% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
127
227
328
428
528
628
728
828
928
1028
1128
1228
1328
1428
1528
1628
1728
1828
1928
2028
2129
2229
2330
2430
2530
2631
2731
2831
2931
3032

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 55% of days. Sticky, muggy-or-worse air turns up on roughly 10% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1382520143
2392520142
3402520132
4402420132
5412419132
6422419122
7432419122
8442419122
9462318111
10472318111
11482218111
12492218101
13512117101
14512117101
1553201791
1656191690
1757191680
1859181580
1960181570
2061171570
2162171470
2265161360
2365161360
2468151250
2568151250
2669151150
2771151040
2872141040
297314940
307513930

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
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 5:20 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)
113.05:206:20
213.05:216:19
312.95:226:17
412.95:246:15
512.85:256:13
612.85:266:12
712.75:276:10
812.75:286:08
912.65:296:06
1012.65:306:04
1112.55:316:03
1212.55:326:01
1312.45:335:59
1412.45:345:57
1512.35:355:55
1612.35:375:53
1712.25:385:52
1812.25:395:50
1912.15:405:48
2012.15:415:46
2112.05:425:44
2212.05:435:42
2311.95:445:41
2411.95:455:39
2511.85:465:37
2611.85:485:35
2711.75:495:33
2811.75:505:31
2911.65:515:30
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 4.15 kWh/m².

For context, solar energy here swings from a low near 1.62 kWh/m² to a high of 5.91 kWh/m² in July across the year — September's 4.15 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.7Bright
34.7Bright
44.6Bright
54.6Bright
64.5Bright
74.5Bright
84.5Bright
94.4Bright
104.4Bright
114.3Bright
124.3Bright
134.3Bright
144.2Bright
154.2Bright
164.2Bright
174.1Bright
184.1Bright
194.0Bright
204.0Moderate
213.9Moderate
223.9Moderate
233.9Moderate
243.8Moderate
253.8Moderate
263.7Moderate
273.6Moderate
283.6Moderate
293.6Moderate
303.5Moderate
Planning a trip in September

Is September a good time to visit Easthampton?

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
4.9
Beach & pool
4th-best month of the year

September is a reasonable time to visit Easthampton for sightseeing.

What to pack for Easthampton in September

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

In September, Easthampton sees daytime highs around 72°F and nights near 54°F. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in Easthampton 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 Easthampton peaks around July 10 at about 7 (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 7Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr5High
May7Very high
Jun7Very high
Jul8Very high
Aug5High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Easthampton 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 Easthampton 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 Easthampton?

Easthampton sits at 42.3°N, 72.7°W, 161 ft above sea level, in United States. The nearest listed city is Northampton, 4.3 mi away.

Topography around Easthampton

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

Within 2 miles, the terrain around Easthampton has significant variations in elevation — a maximum elevation change of 1,073 ft around an average of 272 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,532 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,586 ft.

The land around Easthampton is covered by trees (70%) within 2 miles, trees (77%) within 10 miles, and trees (90%) within 50 miles.

2 miles
1,073 ft
10 miles
1,532 ft
50 miles
3,586 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Northampton 4.3 mi · South Hadley 5.0 mi · Holyoke 5.0 mi · North Chicopee 6.8 mi · Chicopee 8.7 mi · Amherst 11 mi · Westfield 11 mi · Amherst Center 11 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 Easthampton (42.2668°, -72.669°, elevation 161 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. 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).