Narragansett weather in September

In September, Narragansett sees average daytime highs of 71°F and overnight lows near 61°F, with 3.8 in of rain across 8.8 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 74°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 Narragansett's 2nd-clearest and 9th-windiest month. For the whole year in context, see Narragansett's year-round climate.

Daytime high
71°
4th warmest
Overnight low
61°
10th coldest
Rainfall
3.8 in
8.8 wet days
Daylight
12 h 18 min
5:32 AM – 5:48 PM
Cloud cover
54%
2nd clearest
Wind
8 mph
9th windiest
Solar energy
4.29 kWh/m²
Travel score
6.8
out of 10

Narragansett is town in Washington County, Rhode Island, 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 74°F in the first days to 67°F by the end.

A typical September day in Narragansett reaches about 71°F in the afternoon and slips back to 61°F overnight — a 10°F spread between the day's warmth and the night's chill. On most days the high lands between 64°F and 76°F. Set against its neighbours, September runs about 6°F cooler than August and about 9°F warmer than October.

40°50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
17464
27464
37464
47464
57364
67363
77363
87363
97262
107262
117262
127262
137161
147161
157161
167160
177060
187060
197060
206959
216959
226959
236858
246858
256858
266758
276757
286757
296756
306656

How September really feels in Narragansett

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.

Narragansett 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
Jan38° / 27°3.910.24.89.30.0
Feb38° / 27°3.494.110.30.0
Mar44° / 33°4.510.73.811.70.7
Apr53° / 42°4.0110.613.12.9
May62° / 51°3.410.9014.35.1
Jun71° / 61°3.59.5014.96.6
Jul77° / 67°2.99.5014.76.9
Aug76° / 67°3.69013.77.1
Sep71° / 61°3.88.8012.36.8
Oct61° / 51°4.59.60.110.95.2
Nov51° / 41°3.99.10.49.72.7
Dec43° / 33°4.710.82.99.10.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% 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 46%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15644
25644
35545
45644
55644
65545
75545
85545
95545
105545
115644
125644
135644
145545
155446
165446
175446
185347
195347
205248
215248
225248
235149
245248
255248
265248
275347
285347
295347
305446

Chance of precipitation in September

Any precipitation

Narragansett gets around 3.8 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 34% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
126
227
327
427
527
627
727
827
928
1028
1127
1227
1327
1427
1527
1627
1727
1828
1928
2028
2129
2230
2330
2431
2531
2632
2732
2833
2933
3034

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 33% of days. Sticky, muggy-or-worse air turns up on roughly 20% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1142430248
2162430238
3172429237
4182429227
5192428217
6212428216
7222428216
8232427205
9252327205
10262326204
11272326204
12292326193
13302325193
14322225193
15332224182
16342224182
17362223171
18372323171
19382322171
20392322161
21402321160
22412320150
23422320140
24442419130
25452419120
26462418110
27482418110
28492317100
2951231790
3053231680

Wind in September

Winds average 8 mph in September.

Across September, daily wind ranges from about 8 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze

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 5:16 AM to 5:47 AM, and sunset from 6:15 PM to 5:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:166:15
212.95:176:13
312.95:186:11
412.85:196:10
512.85:206:08
612.75:216:06
712.75:236:04
812.75:246:03
912.65:256:01
1012.65:265:59
1112.55:275:57
1212.55:285:55
1312.45:295:54
1412.45:305:52
1512.35:315:50
1612.35:325:48
1712.25:335:47
1812.25:345:45
1912.15:355:43
2012.15:365:41
2112.05:375:39
2212.05:385:38
2311.95:395:36
2411.95:405:34
2511.85:415:32
2611.85:435:30
2711.85:445:29
2811.75:455:27
2911.75:465:25
3011.65:475:23

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 1.67 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 Narragansett

In seasonPeak

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

Narragansett 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 Narragansett?

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

6.8
Sightseeing
3rd-best month of the year
4.4
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Narragansett for sightseeing.

What to pack for Narragansett in September

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

In September, Narragansett sees daytime highs around 71°F and nights near 61°F. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Narragansett in September

The nearest coast averages about 67°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 69°F and coldest in February near 39°F.

It's comfortable for a long swim from Jul 26 to Aug 30 — about 1.2 months when the water holds above 68°F.

40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°F)Comfort
Jan43Bracing
Feb39Bracing
Mar40Bracing
Apr44Bracing
May51Bracing
Jun60Cool
Jul67Cool
Aug69Refreshing
Sep67Cool
Oct61Cool
Nov55Bracing
Dec49Bracing

UV index in Narragansett 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 Narragansett peaks around July 10 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 10UV 8Dec 23UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr5High
May7Very high
Jun8Very high
Jul8Very high
Aug5High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Narragansett?

Narragansett sits at 41.5°N, 71.4°W, 20 ft above sea level, in United States. The nearest listed city is South Kingstown, 3.7 mi away.

Topography around Narragansett

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

Within 2 miles, the terrain around Narragansett has only modest variations in elevation — a maximum elevation change of 213 ft around an average of 49 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 423 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,217 ft.

The land around Narragansett is covered by trees (44%) and water (37%) within 2 miles, water (51%) and trees (37%) within 10 miles, and trees (48%) and water (46%) within 50 miles.

2 miles
213 ft
10 miles
423 ft
50 miles
1,217 ft
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: South Kingstown 3.7 mi · North Kingstown 6.8 mi · Newport 7.5 mi · Middletown 11 mi · Portsmouth 15 mi · Warwick 17 mi · West Warwick 17 mi · Bristol 18 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 Narragansett (41.4501°, -71.4495°, elevation 20 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).