Sault Ste. Marie weather in September

In September, Sault Ste. Marie sees average daytime highs of 65°F and overnight lows near 51°F, with 4.1 in of rain across 11.8 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 69°F in the first days to 60°F by the end. The sky is clear or mostly clear about 31% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 12 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Sault Ste. Marie's 4th-clearest and 9th-windiest month. For the whole year in context, see Sault Ste. Marie's year-round climate.

Daytime high
65°
4th warmest
Overnight low
51°
9th coldest
Rainfall
4.1 in
11.8 wet days
Daylight
12 h 18 min
6:22 AM – 6:41 PM
Cloud cover
59%
4th clearest
Wind
7 mph
9th windiest
Solar energy
3.9 kWh/m²
Travel score
5.6
out of 10

Sault Ste. Marie is city in Michigan, United States.

Density
265/km²
people per km²
Founded
1668

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 69°F in the first days to 60°F by the end.

A typical September day in Sault Ste. Marie reaches about 65°F in the afternoon and slips back to 51°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 56°F and 74°F. Set against its neighbours, September runs about 7°F cooler than August and about 13°F warmer than October.

30°40°50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
16955
26955
36955
46954
56854
66854
76853
86753
96753
106753
116752
126652
136652
146651
156551
166551
176551
186450
196450
206450
216349
226349
236249
246248
256248
266147
276147
286047
296046
305946

How September really feels in Sault Ste. Marie

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.

Sault Ste. Marie weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan21° / 1.810.112.18.80.0
Feb23° / 1.57.88.5100.0
Mar33° / 17°1.88.6711.60.0
Apr46° / 30°2.610.2413.31.2
May58° / 42°2.99.90.314.84.4
Jun69° / 53°3.310.2015.56.3
Jul73° / 58°3.911.3015.26.7
Aug72° / 58°3.811.10146.6
Sep65° / 51°4.111.8012.45.6
Oct52° / 40°4.013.60.410.72.5
Nov39° / 29°2.6116.39.20.2
Dec28° / 17°2.21110.98.50.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25347
35347
45347
55248
65248
75248
85248
95248
105248
115149
125149
135050
144951
154951
164852
174852
184753
194753
204654
214555
224456
234456
244357
254258
264159
274159
284159
294159
304060

Chance of precipitation in September

Any precipitation

Sault Ste. Marie gets around 4.1 in of rain over 11.8 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
137
237
338
438
538
638
738
838
938
1038
1138
1238
1338
1438
1538
1639
1739
1839
1939
2040
2140
2240
2340
2441
2541
2641
2741
2841
2942
3041

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 64% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14229237
24329226
34528216
44628206
54827196
64927195
75126185
85225185
95425174
105624164
115724154
125924143
136023143
146123133
156223123
166422113
176622102
18682192
19692182
20702082
21721972
22731962
23751852
24771751
25791641
26801541
27821431
28831331
29841231
30861121

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 7 mph on the calmest days to 8 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
147light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 12 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 102 minutes over September. Sunrise moves from 6:02 AM to 6:41 AM, and sunset from 7:12 PM to 6:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:027:12
213.16:037:10
313.16:057:08
413.06:067:06
512.96:077:04
612.96:097:02
712.86:107:00
812.86:116:58
912.76:136:56
1012.76:146:54
1112.66:156:52
1212.66:176:50
1312.56:186:48
1412.46:196:46
1512.46:216:44
1612.36:226:41
1712.36:236:39
1812.26:256:37
1912.26:266:35
2012.16:276:33
2112.06:296:31
2212.06:306:29
2311.96:316:27
2411.96:336:25
2511.86:346:23
2611.86:356:21
2711.76:376:19
2811.66:386:17
2911.66:396:15
3011.56:416:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.9 kWh/m².

For context, solar energy here swings from a low near 1.1 kWh/m² to a high of 6.48 kWh/m² in June across the year — September's 3.9 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.5Bright
44.5Bright
54.5Bright
64.4Bright
74.4Bright
84.3Bright
94.3Bright
104.2Bright
114.2Bright
124.1Bright
134.0Bright
144.0Moderate
153.9Moderate
163.9Moderate
173.8Moderate
183.8Moderate
193.7Moderate
203.6Moderate
213.6Moderate
223.5Moderate
233.5Moderate
243.4Moderate
253.4Moderate
263.3Moderate
273.3Moderate
283.2Moderate
293.2Moderate
303.1Moderate
Planning a trip in September

Is September a good time to visit Sault Ste. Marie?

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

5.6
Sightseeing
4th-best month of the year
2.1
Beach & pool
4th-best month of the year

September is a reasonable time to visit Sault Ste. Marie for sightseeing.

What to pack for Sault Ste. Marie in September

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

In September, Sault Ste. Marie sees daytime highs around 65°F and nights near 51°F. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Sault Ste. Marie in September

The nearest coast averages about 61°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 9 mi away) is warmest in August at about 66°F and coldest in February near 33°F.

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

30°40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°F)Comfort
Jan35Bracing
Feb33Bracing
Mar33Bracing
Apr35Bracing
May41Bracing
Jun51Bracing
Jul63Cool
Aug66Cool
Sep61Cool
Oct53Bracing
Nov44Bracing
Dec38Bracing

UV index in Sault Ste. Marie in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sault Ste. Marie peaks around June 18 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 21 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 18UV 8Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May7High
Jun8Very high
Jul7Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Sault Ste. Marie?

Sault Ste. Marie sits at 46.5°N, 84.3°W, 0 ft above sea level, in United States. The nearest listed city is Sault Ste. Marie, 1.9 mi away.

Topography around Sault Ste. Marie

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

Within 2 miles, the terrain around Sault Ste. Marie has only modest variations in elevation — a maximum elevation change of 197 ft around an average of 627 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 807 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,611 ft.

The land around Sault Ste. Marie is covered by trees (31%), artificial surfaces (25%) and water (25%) within 2 miles, trees (60%) within 10 miles, and trees (64%) and water (31%) within 50 miles.

2 miles
197 ft
10 miles
807 ft
50 miles
1,611 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Sault Ste. Marie 1.9 mi · Mackinac Island 47 mi · Traverse City 135 mi · Marquette 145 mi · Valley East 159 mi · Greater Sudbury 160 mi · Timmins 196 mi · Midland 199 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 Sault Ste. Marie (46.4953°, -84.3453°, elevation 0 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. 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).