Leamington weather in September

In September, Leamington sees average daytime highs of 21°C and overnight lows near 18°C, with 80 mm of rain across 8.5 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 19°C by the end. The sky is clear or mostly clear about 44% 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 Leamington's 3rd-clearest and 9th-windiest month. For the whole year in context, see Leamington's year-round climate.

Daytime high
21°
4th warmest
Overnight low
18°
9th coldest
Rainfall
80 mm
8.5 wet days
Daylight
12 h 18 min
6:16 AM – 6:33 PM
Cloud cover
49%
3rd clearest
Wind
20 km/h
9th windiest
Solar energy
4.55 kWh/m²
Travel score
6.9
out of 10

Leamington is municipality in Essex County, Ontario, Canada.

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 23°C in the first days to 19°C by the end.

A typical September day in Leamington reaches about 21°C in the afternoon and slips back to 18°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 25°C. Set against its neighbours, September runs about 4°C cooler than August and about 7°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12420
22420
32420
42320
52320
62319
72319
82319
92319
102219
112219
122218
132218
142218
152118
162118
172117
182117
192117
202017
212017
222016
232016
241916
251916
261915
271915
281915
291815
301815

How September really feels in Leamington

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 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
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.

Leamington weather by month

How September compares with the rest of the year at a glance. September is the 4th-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° / -5°7411.479.30.0
Feb-1° / -6°608.85.610.30.0
Mar / -2°739.7411.70.0
Apr / 9411.7113.11.6
May17° / 13°9112.1014.35.0
Jun23° / 19°10111.50156.6
Jul26° / 22°9211.1014.76.7
Aug25° / 21°8810.2013.77.1
Sep21° / 18°808.5012.36.9
Oct15° / 11°8410.8010.94.3
Nov / 8410.829.61.2
Dec / -1°7811.55.790.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% 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 42%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16337
26238
36238
46337
56238
66238
76238
86139
96139
106040
116139
126040
136040
145941
155941
165842
175743
185743
195743
205644
215644
225644
235545
245545
255545
265545
275446
285446
295446
305446

Chance of precipitation in September

Any precipitation

Leamington gets around 80 mm of rain over 8.5 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 36% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
127
227
327
427
527
627
727
827
926
1026
1126
1226
1326
1426
1526
1626
1727
1827
1927
2028
2129
2230
2331
2432
2533
2634
2735
2835
2936
3036

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 35% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
114202528121
215212527111
317212526111
418222525101
51922252490
62122242480
72223242380
82423242270
92523232260
102723232160
112823232050
123023232050
133123221940
143323221840
153423221730
163623221630
173723211630
183923211520
194023201420
204223201320
214323191320
224523191210
234624181110
244824181010
25492317910
26502317910
27522316810
28552315700
29562215700
30582214600

Wind in September

Winds average 20 km/h in September.

Across September, daily wind ranges from about 19 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
820light breeze
920light breeze
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420breezy
1520breezy
1620breezy
1720breezy
1821breezy
1921breezy
2021breezy
2121breezy
2221breezy
2321breezy
2421breezy
2522breezy
2622breezy
2722breezy
2822breezy
2922breezy
3022breezy

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 6:00 AM to 6:32 AM, and sunset from 7:00 PM to 6:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:007:00
212.96:016:58
312.96:026:56
412.96:036:55
512.86:056:53
612.86:066:51
712.76:076:49
812.76:086:48
912.66:096:46
1012.66:106:44
1112.56:116:42
1212.56:126:40
1312.46:136:39
1412.46:146:37
1512.36:156:35
1612.36:166:33
1712.26:176:31
1812.26:196:29
1912.16:206:28
2012.16:216:26
2112.06:226:24
2212.06:236:22
2311.96:246:20
2411.96:256:19
2511.86:266:17
2611.86:276:15
2711.76:286:13
2811.76:296:11
2911.66:316:10
3011.66:326:08

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.55 kWh/m².

For context, solar energy here swings from a low near 1.45 kWh/m² to a high of 6.68 kWh/m² in June across the year — September's 4.55 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.1Bright
35.1Bright
45.0Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.7Bright
124.7Bright
134.6Bright
144.6Bright
154.5Bright
164.5Bright
174.5Bright
184.4Bright
194.4Bright
204.3Bright
214.3Bright
224.2Bright
234.2Bright
244.2Bright
254.1Bright
264.0Bright
274.0Bright
284.0Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Is September a good time to visit Leamington?

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
4.3
Beach & pool
4th-best month of the year

September is a reasonable time to visit Leamington for sightseeing.

What to pack for Leamington in September

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

In September, Leamington sees daytime highs around 21°C and nights near 18°C. Worth packing: rain gear, sun protection and a windbreaker. About 9 days see rain.

rain gearsun protectiona windbreaker

Sea temperature near Leamington in September

The nearest coast averages about 21°C 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 20 km away) is warmest in August at about 24°C and coldest in February near 1°C.

It's comfortable for a long swim from Jun 23 to Sep 23 — about 3.1 months when the water holds above 20°C.

0°10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan1Bracing
Feb1Bracing
Mar2Bracing
Apr6Bracing
May12Bracing
Jun19Cool
Jul24Refreshing
Aug24Warm
Sep21Refreshing
Oct15Cool
Nov9Bracing
Dec4Bracing

UV index in Leamington 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 Leamington peaks around June 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. 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 highHighModerateLowJun 20UV 9Dec 23UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr6High
May7Very high
Jun9Very high
Jul9Very high
Aug7High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Leamington 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 Leamington is worst in June — around 16 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 1716 µg/m³Oct 248 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar13Moderate
Apr14Moderate
May16Moderate
Jun16Moderate
Jul16Moderate
Aug14Moderate
Sep12Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Leamington?

Leamington sits at 42.1°N, 82.6°W, 188 m above sea level, in Canada. The nearest listed city is Kingsville, 12 km away.

Topography around Leamington

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

Within 3 km, the terrain around Leamington has only modest variations in elevation — a maximum elevation change of 49 m around an average of 188 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 63 m; within 80 km, only modest variations in elevation — a maximum elevation change of 184 m.

The land around Leamington is covered by cropland (31%), artificial surfaces (30%) and grassland (21%) within 3 km, cropland (42%) and water (40%) within 16 km, and water (53%) and cropland (24%) within 80 km.

3 km
49 m
16 km
63 m
80 km
184 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Kingsville 12 km · Tecumseh 38 km · LaSalle 44 km · Windsor 44 km · Detroit 48 km · Trenton 49 km · Wyandotte 49 km · Grosse Pointe Woods 51 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 Leamington (42.0501°, -82.5998°, elevation 188 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. 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).