Newburyport weather in September

In September, Newburyport sees average daytime highs of 71°F and overnight lows near 57°F, with 3.4 in of rain across 8.4 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 75°F in the first days to 67°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 Newburyport's 1st-clearest and 9th-windiest month. For the whole year in context, see Newburyport's year-round climate.

Daytime high
71°
4th warmest
Overnight low
57°
9th coldest
Rainfall
3.4 in
8.4 wet days
Daylight
12 h 18 min
5:29 AM – 5:46 PM
Cloud cover
54%
1st clearest
Wind
7 mph
9th windiest
Solar energy
4.16 kWh/m²
Travel score
6.9
out of 10

Newburyport is city in Essex County, Massachusetts, United States.

Density
651/km²
people per km²
Founded
1635

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 67°F by the end.

A typical September day in Newburyport reaches about 71°F in the afternoon and slips back to 57°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 80°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)
17561
27561
37561
47561
57460
67460
77460
87359
97359
107359
117358
127258
137258
147258
157157
167157
177156
187056
197056
207056
216955
226955
236955
246854
256854
266753
276753
286753
296652
306652

How September really feels in Newburyport

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.

Newburyport weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan34° / 21°3.39.66.29.20.0
Feb36° / 22°3.195.810.30.0
Mar43° / 29°4.211.1511.60.5
Apr54° / 40°3.810.71.213.13.2
May64° / 50°3.110.6014.45.5
Jun73° / 59°3.410.8015.16.5
Jul79° / 65°3.210.1014.86.6
Aug78° / 64°3.38.7013.77.0
Sep71° / 57°3.48.4012.36.9
Oct60° / 46°3.99.70.310.84.9
Nov49° / 37°3.59.419.62.1
Dec39° / 27°4.210.34.78.90.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in September, the clearest month of the year.

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 (%)
15743
25644
35545
45545
55446
65446
75446
85347
95347
105347
115347
125446
135446
145446
155347
165347
175347
185347
195347
205248
215248
225248
235248
245149
255149
265149
275149
285149
295248
305248

Chance of precipitation in September

Any precipitation

Newburyport gets around 3.4 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 30% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
125
226
326
427
527
628
728
829
929
1029
1129
1229
1329
1428
1528
1627
1727
1827
1927
2027
2127
2227
2327
2427
2528
2628
2728
2829
2929
3030

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 46% of days. Sticky, muggy-or-worse air turns up on roughly 12% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1263024173
2273023163
3293023163
4302922153
5322922153
6332822143
7342822142
8362722142
9372621132
10392621132
11402521132
12412520121
13432520121
14442419111
15462418111
16472418101
17482417100
18502417100
1952231690
2052231690
2154231580
2254231580
2357221470
2458221370
2560221260
2661211260
2763211150
2865201050
2967191040
306918940

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 7 mph on the calmest days to 7 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
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 5:13 AM to 5:45 AM, and sunset from 6:14 PM to 5:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:136:14
213.05:146:12
312.95:156:10
412.95:166:09
512.85:176:07
612.85:186:05
712.75:196:03
812.75:206:01
912.65:215:59
1012.65:235:58
1112.55:245:56
1212.55:255:54
1312.45:265:52
1412.45:275:50
1512.35:285:48
1612.35:295:46
1712.25:305:45
1812.25:315:43
1912.15:335:41
2012.15:345:39
2112.05:355:37
2212.05:365:35
2311.95:375:33
2411.95:385:32
2511.85:395:30
2611.85:415:28
2711.75:425:26
2811.75:435:24
2911.65:445:22
3011.65:455:21

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.16 kWh/m².

For context, solar energy here swings from a low near 1.57 kWh/m² to a high of 5.97 kWh/m² in July across the year — September's 4.16 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.7Bright
44.7Bright
54.6Bright
64.6Bright
74.5Bright
84.5Bright
94.5Bright
104.4Bright
114.4Bright
124.3Bright
134.3Bright
144.2Bright
154.2Bright
164.2Bright
174.1Bright
184.1Bright
194.0Bright
204.0Moderate
214.0Moderate
223.9Moderate
233.9Moderate
243.8Moderate
253.8Moderate
263.7Moderate
273.7Moderate
283.6Moderate
293.6Moderate
303.5Moderate
Planning a trip in September

Hazard calendar for Newburyport

In seasonPeak

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

Newburyport 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 Newburyport?

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

6.9
Sightseeing
2nd-best month of the year
4.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Newburyport for sightseeing.

What to pack for Newburyport in September

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

In September, Newburyport sees daytime highs around 71°F and nights near 57°F. Worth packing: rain gear. About 8 days see rain.

rain gear

Sea temperature near Newburyport in September

The nearest coast averages about 62°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 14 mi away) is warmest in August at about 65°F and coldest in March near 39°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°F)Comfort
Jan42Bracing
Feb40Bracing
Mar39Bracing
Apr42Bracing
May49Bracing
Jun57Bracing
Jul64Cool
Aug65Cool
Sep62Cool
Oct56Bracing
Nov49Bracing
Dec46Bracing

UV index in Newburyport 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 Newburyport 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 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 highHighHighModerateLowJul 10UV 7Dec 23UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May7High
Jun7High
Jul7Very high
Aug5Moderate
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Newburyport 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 Newburyport is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1715 µg/m³Nov 188 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb13Moderate
Mar13Moderate
Apr13Moderate
May14Moderate
Jun13Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct9Good
Nov8Good
Dec9Good
Location & terrain

Where is Newburyport?

Newburyport sits at 42.8°N, 70.9°W, 36 ft above sea level, in United States. The nearest listed city is Amesbury, 4.3 mi away.

Topography around Newburyport

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

Within 2 miles, the terrain around Newburyport has only modest variations in elevation — a maximum elevation change of 141 ft around an average of 33 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 397 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,952 ft.

The land around Newburyport is covered by trees (44%) within 2 miles, trees (48%) and water (31%) within 10 miles, and trees (60%) and water (32%) within 50 miles.

2 miles
141 ft
10 miles
397 ft
50 miles
1,952 ft
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Amesbury 4.3 mi · Haverhill 11 mi · North Andover 16 mi · Lawrence 16 mi · Salem 17 mi · Danvers 17 mi · Methuen 17 mi · Gloucester 17 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 Newburyport (42.8126°, -70.8773°, elevation 36 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).