Palmer weather in September

In September, Palmer sees average daytime highs of 71°F and overnight lows near 56°F, with 3.6 in of rain across 8.4 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 75°F in the first days to 66°F by the end. The sky is clear or mostly clear about 38% 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 Palmer's 1st-clearest and 10th-windiest month. For the whole year in context, see Palmer's year-round climate.

Daytime high
71°
4th warmest
Overnight low
56°
9th coldest
Rainfall
3.6 in
8.4 wet days
Daylight
12 h 18 min
5:35 AM – 5:52 PM
Cloud cover
55%
1st clearest
Wind
6 mph
10th windiest
Solar energy
4.14 kWh/m²
Travel score
6.9
out of 10

Palmer is census-designated place in Hampden County, Massachusetts, United States.

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 75°F in the first days to 66°F by the end.

A typical September day in Palmer reaches about 71°F in the afternoon and slips back to 56°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 79°F. Set against its neighbours, September runs about 7°F cooler than August and about 12°F warmer than October.

40°50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
17660
27560
37560
47560
57559
67459
77459
87458
97358
107358
117357
127257
137257
147256
157156
167156
177155
187055
197055
206954
216954
226954
236853
246853
256853
266752
276752
286651
296651
306551

How September really feels in Palmer

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.

Palmer 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°3.39.86.39.30.0
Feb35° / 20°3.08.75.710.30.0
Mar43° / 28°4.010.5511.60.6
Apr55° / 39°3.5111.613.13.3
May65° / 49°3.2110.114.45.6
Jun74° / 59°3.611.10156.5
Jul80° / 65°3.49.9014.86.6
Aug78° / 63°3.49.3013.76.9
Sep71° / 56°3.68.4012.36.9
Oct59° / 45°4.09.70.410.84.7
Nov48° / 35°3.391.49.61.8
Dec38° / 26°4.110.35.290.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25644
35545
45545
55446
65446
75446
85545
95446
105446
115446
125545
135446
145446
155446
165446
175347
185347
195347
205248
215248
225347
235248
245248
255248
265248
275248
285248
295248
305248

Chance of precipitation in September

Any precipitation

Palmer gets around 3.6 in of rain over 8.4 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 (%)
125
225
326
426
527
627
727
827
927
1028
1127
1227
1327
1427
1527
1627
1727
1827
1927
2027
2127
2228
2328
2428
2529
2629
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 52% of days. Sticky, muggy-or-worse air turns up on roughly 9% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1322922142
2332922132
3342922132
4352921132
5372821122
6382820122
7392820112
8402720112
9412719112
10432619111
11442619101
12462518101
13472418101
1449241791
1550231791
1652221781
1754221680
1855211680
1957201670
2058201570
2159191570
2261191460
2362181460
2464181350
2565181250
2667171240
2768171140
2870161040
2971161030
307315930

Wind in September

Winds average 6 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
176calm
186calm
196calm
206calm
216calm
226calm
236calm
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 5:19 AM to 5:51 AM, and sunset from 6:19 PM to 5:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:196:19
213.05:206:17
312.95:216:15
412.95:226:14
512.85:236:12
612.85:246:10
712.75:266:08
812.75:276:07
912.65:286:05
1012.65:296:03
1112.55:306:01
1212.55:315:59
1312.45:325:58
1412.45:335:56
1512.35:345:54
1612.35:355:52
1712.25:365:50
1812.25:375:48
1912.15:395:47
2012.15:405:45
2112.05:415:43
2212.05:425:41
2311.95:435:39
2411.95:445:37
2511.85:455:36
2611.85:465:34
2711.75:475:32
2811.75:485:30
2911.65:505:28
3011.65:515:27

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.14 kWh/m².

For context, solar energy here swings from a low near 1.62 kWh/m² to a high of 5.88 kWh/m² in July across the year — September's 4.14 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
84.4Bright
94.4Bright
104.4Bright
114.3Bright
124.3Bright
134.3Bright
144.2Bright
154.2Bright
164.1Bright
174.1Bright
184.1Bright
194.0Bright
204.0Moderate
213.9Moderate
223.9Moderate
233.8Moderate
243.8Moderate
253.7Moderate
263.7Moderate
273.6Moderate
283.6Moderate
293.5Moderate
303.5Moderate
Planning a trip in September

Is September a good time to visit Palmer?

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
4.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Palmer for sightseeing.

What to pack for Palmer in September

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

In September, Palmer sees daytime highs around 71°F and nights near 56°F. Worth packing: rain gear. About 8 days see rain.

rain gear

UV index in Palmer 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 Palmer 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 January 1 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 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar4Moderate
Apr5High
May8Very high
Jun7Very high
Jul8Very high
Aug5High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Palmer?

Palmer sits at 42.2°N, 72.3°W, 344 ft above sea level, in United States. The nearest listed city is Ludlow, 7.5 mi away.

Topography around Palmer

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

Within 2 miles, the terrain around Palmer has only modest variations in elevation — a maximum elevation change of 719 ft around an average of 538 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,155 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,097 ft.

The land around Palmer is covered by trees (85%) within 2 miles, trees (87%) within 10 miles, and trees (91%) within 50 miles.

2 miles
719 ft
10 miles
1,155 ft
50 miles
3,097 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Ludlow 7.5 mi · East Longmeadow 11 mi · Springfield 14 mi · North Chicopee 14 mi · Chicopee 14 mi · South Hadley 14 mi · Longmeadow 15 mi · Holyoke 15 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 Palmer (42.1584°, -72.3287°, elevation 344 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).