Cranston weather in September

In September, Cranston sees average daytime highs of 73°F and overnight lows near 57°F, with 3.6 in of rain across 8.3 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 77°F in the first days to 69°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 Cranston's 2nd-clearest and 10th-windiest month. For the whole year in context, see Cranston's year-round climate.

Daytime high
73°
4th warmest
Overnight low
57°
9th coldest
Rainfall
3.6 in
8.3 wet days
Daylight
12 h 18 min
5:32 AM – 5:48 PM
Cloud cover
55%
2nd clearest
Wind
7 mph
10th windiest
Solar energy
4.15 kWh/m²
Travel score
7.0
out of 10

Cranston is city in Providence County, Rhode Island, United States.

Density
1,046/km²
people per km²
Founded
1754

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 77°F in the first days to 69°F by the end.

A typical September day in Cranston reaches about 73°F in the afternoon and slips back to 57°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 65°F and 81°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)
17861
27761
37761
47761
57660
67660
77660
87560
97559
107559
117459
127458
137458
147458
157357
167357
177357
187256
197256
207156
217155
227155
237155
247054
257054
266954
276953
286953
296853
306852

How September really feels in Cranston

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.

Cranston weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 23°3.6105.29.30.0
Feb39° / 24°3.18.64.810.30.0
Mar46° / 31°4.410.74.311.71.2
Apr57° / 41°3.810.80.713.13.9
May67° / 50°3.110.8014.35.9
Jun76° / 60°3.510.10156.7
Jul82° / 66°3.210.6014.76.3
Aug80° / 64°3.810.3013.76.5
Sep73° / 57°3.68.3012.37.0
Oct62° / 47°4.19.30.210.95.4
Nov51° / 37°3.58.80.89.62.7
Dec42° / 29°4.310.4490.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% 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 49%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25347
35248
45248
55248
65248
75248
85248
95248
105248
115149
125149
135149
145149
155149
165149
175149
185149
195050
205149
215050
225149
235149
245149
255149
265149
275248
285248
295248
305347

Chance of precipitation in September

Any precipitation

Cranston gets around 3.6 in of rain over 8.3 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 32% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
126
226
326
426
526
627
727
827
927
1027
1127
1226
1326
1426
1526
1626
1726
1826
1927
2027
2127
2228
2328
2429
2530
2630
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 43% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1252723187
2262723187
3272723177
4282722176
5292722166
6302722166
7312622165
8332621155
9342521155
10352421154
11362421154
12382321154
13392320143
14412320143
15422220142
16432219142
17452119132
18462118132
19472118131
20482118131
21492017121
22502017121
23522016111
24522016111
25551915101
2656191591
2757191581
2858191481
2960181471
3063181360

Wind in September

Winds average 7 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
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 5:16 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
312.95:186:12
412.85:196:10
512.85:206:08
612.85:216:06
712.75:226:05
812.75:236:03
912.65:246:01
1012.65:255:59
1112.55:265:57
1212.55:285:56
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
2212.05:385:37
2311.95:395:36
2411.95:405:34
2511.85:415:32
2611.85:435:30
2711.75:445:29
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 4.15 kWh/m².

For context, solar energy here swings from a low near 1.66 kWh/m² to a high of 5.93 kWh/m² in June 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
204.0Bright
214.0Moderate
223.9Moderate
233.9Moderate
243.8Moderate
253.8Moderate
263.7Moderate
273.7Moderate
283.6Moderate
293.6Moderate
303.6Moderate
Planning a trip in September

Hazard calendar for Cranston

In seasonPeak

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

Cranston 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 Cranston?

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
5.2
Beach & pool
4th-best month of the year

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

What to pack for Cranston in September

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

In September, Cranston sees daytime highs around 73°F and nights near 57°F. Worth packing: light clothes and rain gear. About 8 days see rain.

light clothesrain gear

Sea temperature near Cranston 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 at the nearest coast (about 28 mi away) 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 Cranston 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 Cranston 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

Air quality in Cranston 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 Cranston is worst in July — around 16 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1516 µg/m³Nov 189 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar14Moderate
Apr14Moderate
May15Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep12Good
Oct10Good
Nov8Good
Dec10Good
Location & terrain

Where is Cranston?

Cranston sits at 41.8°N, 71.4°W, 62 ft above sea level, in United States. The nearest listed city is Providence, 3.1 mi away.

Topography around Cranston

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

Within 2 miles, the terrain around Cranston has only modest variations in elevation — a maximum elevation change of 220 ft around an average of 69 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 600 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,604 ft.

The land around Cranston is covered by artificial surfaces (55%) and trees (33%) within 2 miles, trees (55%) within 10 miles, and trees (63%) and water (28%) within 50 miles.

2 miles
220 ft
10 miles
600 ft
50 miles
1,604 ft
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Providence 3.1 mi · East Providence 4.3 mi · Johnston 4.3 mi · North Providence 5.0 mi · Warwick 5.6 mi · Barrington 7.5 mi · West Warwick 7.5 mi · Pawtucket 7.5 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 Cranston (41.7798°, -71.4373°, elevation 62 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).