Sarnia weather in November

In November, Sarnia sees average daytime highs of 8°C and overnight lows near 2°C, with 66 mm of precipitation across 9.7 wet days and about 9.5 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 10°C in the first days to 5°C by the end. The sky is clear or mostly clear about 16% of the time in November, and the air most often feels dry.

Daylight stretches from about 10 h 06 min at the start of November to 9 h 06 min by month's end. Set against the rest of the year, November is Sarnia's 9th-clearest and 1st-windiest month. For the whole year in context, see Sarnia's year-round climate.

Daytime high
8th warmest
Overnight low
5th coldest
Precipitation
66 mm
9.7 wet days
Daylight
9 h 30 min
7:30 AM – 5:00 PM
Cloud cover
73%
9th clearest
Wind
16 km/h
1st windiest
Solar energy
1.78 kWh/m²
Travel score
1.2
out of 10

Sarnia is city in Ontario, Canada.

Air quality
Good
PM2.5 7 µg/m³ · 2019
Density
440/km²
people per km²
Founded
1830

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in November

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 10°C in the first days to 5°C by the end.

A typical November day in Sarnia reaches about 8°C in the afternoon and slips back to 2°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 2°C and 14°C. Set against its neighbours, November runs about 7°C cooler than October and about 6°C warmer than December.

-10°10°20°151015202530
Avg high (°C)Avg low (°C)
1115
2114
3104
4104
5104
6104
793
893
993
1093
1193
1283
1382
1482
1582
1672
1772
1872
1971
2071
2161
2261
2361
2461
2561
2660
2750
2850
2950
3050

How November really feels in Sarnia

Once humidity and wind are folded in, November averages 0 days that feel above 32°C and 25 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
25
wind chill below the day's low

The story in November is cold — wind chill drags the overnight "feels like" below the raw low.

Sarnia weather by month

How November compares with the rest of the year at a glance. November is the 8th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -7°579.67.39.20.0
Feb / -7°518.46.310.20.0
Mar / -3°579.64.611.60.3
Apr11° / 8511.41.813.12.7
May18° / 10°8512014.45.4
Jun24° / 16°8710.8015.16.7
Jul26° / 18°7111014.86.6
Aug25° / 18°7010.4013.86.9
Sep21° / 14°739.1012.36.7
Oct15° / 7710.80.110.84.3
Nov / 669.72.49.51.2
Dec / -3°569.45.68.90.0

Cloud cover in November

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in November.

Beyond those clear spells, partly cloudy skies cover about 11% of November, with mostly cloudy or overcast conditions the remaining 73%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13169
23169
33070
43169
53268
63268
73169
83169
93169
103169
113169
123070
133070
142971
152971
162971
172872
182872
192674
202674
212476
222476
232476
242377
252278
262278
272080
282080
292080
302080

Chance of precipitation in November

Any precipitationSnow

Sarnia gets around 66 mm of rain and snow over 9.7 wet days in November. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 32% and peaks near 35% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1331
2322
3312
4312
5303
6303
7304
8294
9295
10295
11296
12296
13297
14297
15308
16308
17319
18329
193210
203310
213411
223411
233412
243512
253512
263512
273513
283513
293513
303514

Humidity in November

DryComfortableHumidMuggyOppressiveMiserable

Most of November feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, November lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1982
2982
3982
4991
5991
6991
7991
8991
9991
10991
11991
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000

Wind in November

Winds average 16 km/h in November, the windiest month of the year.

Across November, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2816light breeze
2916light breeze
3016light breeze

Sunrise & sunset in November

DaylightNight

Daylight runs from about 10 h 06 min at the start of November to 9 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over November. Sunrise moves from 7:11 AM to 7:46 AM, and sunset from 5:15 PM to 4:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
110.17:115:15
210.07:125:14
310.07:135:13
49.97:155:12
59.97:165:11
69.97:175:09
79.87:195:08
89.87:205:07
99.77:215:06
109.77:225:05
119.77:245:04
129.67:255:03
139.67:265:02
149.67:285:01
159.57:295:00
169.57:305:00
179.57:314:59
189.47:334:58
199.47:344:57
209.47:354:57
219.37:364:56
229.37:374:55
239.37:394:55
249.27:404:54
259.27:414:54
269.27:424:53
279.27:434:53
289.17:444:52
299.17:454:52
309.17:464:52

Solar energy in November

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in November, about 1.78 kWh/m².

For context, solar energy here swings from a low near 1.36 kWh/m² to a high of 6.37 kWh/m² in June across the year — November's 1.78 kWh/m² sits near the bottom.

0123151015202530
Solar energy (kWh/m²)Level
12.2Moderate
22.1Moderate
32.1Moderate
42.1Moderate
52.1Moderate
62.0Moderate
72.0Moderate
82.0Moderate
92.0Dim
101.9Dim
111.9Dim
121.9Dim
131.9Dim
141.8Dim
151.8Dim
161.8Dim
171.8Dim
181.7Dim
191.7Dim
201.7Dim
211.6Dim
221.6Dim
231.6Dim
241.6Dim
251.5Dim
261.5Dim
271.5Dim
281.5Dim
291.5Dim
301.4Dim
Planning a trip in November

Is November a good time to visit Sarnia?

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

1.2
Sightseeing
8th-best month of the year
0.0
Beach & pool
8th-best month of the year

November is a weaker month for outdoor sightseeing in Sarnia.

What to pack for Sarnia in November

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

In November, Sarnia sees daytime highs around 8°C and nights near 2°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Sarnia in November

The nearest coast averages about 9°C in November — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 16 km away) is warmest in August at about 22°C and coldest in February near 1°C.

It's comfortable for a long swim from Jul 19 to Sep 8 — about 1.7 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan2Bracing
Feb1Bracing
Mar1Bracing
Apr3Bracing
May7Bracing
Jun14Bracing
Jul20Refreshing
Aug22Refreshing
Sep20Cool
Oct14Bracing
Nov9Bracing
Dec5Bracing

UV index in Sarnia in November

LowModerateHighVery highExtreme

Clear-sky midday UV in November peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sarnia peaks around June 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 highHighModerateLowJun 20UV 9Dec 20UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr5High
May7High
Jun9Very high
Jul8Very high
Aug7High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Sarnia?

Sarnia sits at 43.0°N, 82.4°W, 185 m above sea level, in Canada. The nearest listed city is Port Huron, 2.0 km away.

Topography around Sarnia

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sarnia.

Within 3 km, the terrain around Sarnia has only modest variations in elevation — a maximum elevation change of 19 m around an average of 182 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 69 m; within 80 km, only modest variations in elevation — a maximum elevation change of 216 m.

The land around Sarnia is covered by artificial surfaces (52%) and trees (22%) within 3 km, cropland (27%), trees (25%) and water (24%) within 16 km, and cropland (45%) and water (25%) within 80 km.

3 km
19 m
16 km
69 m
80 km
216 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
November weather nearby: Port Huron 2.0 km · Mount Clemens 57 km · Clinton Township 61 km · Shelby 62 km · Strathroy 64 km · Chatham 65 km · Saint Clair Shores 67 km · Sterling Heights 68 km

Canada travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 83% of US
price level, 2025
GDP per capita
$55,698
2025
Happiness
6.7 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
2
per 100k, 2023
Road deaths
5.3
per 100k/yr, 2019
Income group
High
World Bank
Religion
Christian 53%none 35%Muslim 5%Hindu 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 Sarnia (42.9787°, -82.4041°, elevation 185 m), 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).