Aurora weather in September

In September, Aurora sees average daytime highs of 21°C and overnight lows near 10°C, with 73 mm of rain across 9.2 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 23°C in the first days to 18°C by the end. The sky is clear or mostly clear about 30% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Aurora's 3rd-clearest and 10th-windiest month. For the whole year in context, see Aurora's year-round climate.

Daytime high
21°
4th warmest
Overnight low
10°
9th coldest
Rainfall
73 mm
9.2 wet days
Daylight
12 h 18 min
6:03 AM – 6:21 PM
Cloud cover
58%
3rd clearest
Wind
11 km/h
10th windiest
Solar energy
4.13 kWh/m²
Travel score
6.6
out of 10

Aurora is town in York Region, Ontario, Canada.

Density
1,112/km²
people per km²
Founded
1854

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 18°C by the end.

A typical September day in Aurora reaches about 21°C in the afternoon and slips back to 10°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 27°C. Set against its neighbours, September runs about 4°C cooler than August and about 7°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12413
22413
32413
42312
52312
62312
72312
82312
92212
102211
112211
122211
132211
142211
152110
162110
172110
182110
192010
20209
21209
22209
23209
24199
25198
26198
27188
28188
29188
30187

How September really feels in Aurora

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.

Aurora 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 (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-2° / -11°5710.18.89.10.0
Feb-1° / -11°467.96.810.20.0
Mar / -5°5610.15.811.60.3
Apr12° / 7711.42.313.23.0
May19° / 8011.2014.55.8
Jun24° / 13°8811.2015.26.6
Jul26° / 15°8410.80156.6
Aug25° / 14°789.6013.86.9
Sep21° / 10°739.2012.36.6
Oct14° / 75110.410.83.8
Nov / -1°6810.23.49.40.7
Dec / -7°579.97.38.80.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 51%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25446
35347
45347
55347
65347
75248
85248
95149
105149
115050
125050
134951
144951
154951
164951
174951
184852
194852
204753
214654
224654
234654
244456
254456
264456
274357
284357
294357
304357

Chance of precipitation in September

Any precipitation

Aurora gets around 73 mm of rain over 9.2 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 31% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
129
229
330
430
530
630
731
831
931
1030
1130
1230
1330
1430
1529
1629
1729
1829
1929
2029
2130
2230
2331
2431
2532
2633
2734
2834
2935
3035

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 63% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1422819111
2442718111
3452717101
4472617100
549261690
651251590
751251590
854241480
954241480
1057231370
1157231370
1259221360
1360221260
1462211250
1562211250
1664201240
1764201240
1867191130
1967191130
2068181130
2171171020
2271171020
2373161010
247416910
257515910
267714810
277714810
288013700
298013700
308212600

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2912calm
3012calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 min 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 90 minutes over September. Sunrise moves from 5:46 AM to 6:20 AM, and sunset from 6:50 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:466:50
213.05:476:48
313.05:486:46
412.95:496:44
512.95:506:42
612.85:516:40
712.85:536:38
812.75:546:36
912.75:556:35
1012.65:566:33
1112.65:576:31
1212.55:596:29
1312.56:006:27
1412.46:016:25
1512.46:026:23
1612.36:036:21
1712.26:046:19
1812.26:066:17
1912.16:076:15
2012.16:086:13
2112.06:096:12
2212.06:106:10
2311.96:126:08
2411.96:136:06
2511.86:146:04
2611.86:156:02
2711.76:166:00
2811.76:185:58
2911.66:195:56
3011.66:205:54

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.13 kWh/m².

For context, solar energy here swings from a low near 1.29 kWh/m² to a high of 6.32 kWh/m² in June across the year — September's 4.13 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
134.2Bright
144.2Bright
154.2Bright
164.1Bright
174.1Bright
184.0Bright
194.0Moderate
203.9Moderate
213.9Moderate
223.8Moderate
233.8Moderate
243.7Moderate
253.7Moderate
263.6Moderate
273.6Moderate
283.5Moderate
293.5Moderate
303.4Moderate
Planning a trip in September

Is September a good time to visit Aurora?

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

6.6
Sightseeing
2nd-best month of the year
4.0
Beach & pool
4th-best month of the year

September is a reasonable time to visit Aurora for sightseeing.

What to pack for Aurora in September

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

In September, Aurora sees daytime highs around 21°C and nights near 10°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Aurora in September

The nearest coast averages about 19°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 42 km away) is warmest in August at about 21°C and coldest in February near 3°C.

It's comfortable for a long swim from Jul 20 to Sep 2 — about 1.5 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr4Bracing
May7Bracing
Jun15Bracing
Jul20Cool
Aug21Refreshing
Sep19Cool
Oct13Bracing
Nov8Bracing
Dec5Bracing

UV index in Aurora 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 Aurora peaks around June 22 at about 8 (very high) — sunscreen, a hat and midday shade are essential. 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 22UV 8Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May6High
Jun8Very high
Jul8Very high
Aug6High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Aurora 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 Aurora is worst in May — around 19 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (November, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 2019 µg/m³Nov 239 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar16Moderate
Apr17Moderate
May19Moderate
Jun18Moderate
Jul18Moderate
Aug16Moderate
Sep14Moderate
Oct10Good
Nov9Good
Dec9Good
Location & terrain

Where is Aurora?

Aurora sits at 44.0°N, 79.5°W, 266 m above sea level, in Canada. The nearest listed city is Newmarket, 6.0 km away.

Topography around Aurora

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

Within 3 km, the terrain around Aurora has only modest variations in elevation — a maximum elevation change of 98 m around an average of 277 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 188 m; within 80 km, significant variations in elevation — a maximum elevation change of 532 m.

The land around Aurora is covered by trees (39%), artificial surfaces (33%) and grassland (23%) within 3 km, trees (39%), cropland (24%) and grassland (23%) within 16 km, and trees (31%), cropland (25%) and water (24%) within 80 km.

3 km
98 m
16 km
188 m
80 km
532 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Newmarket 6.0 km · East Gwillimbury 11 km · Whitchurch-Stouffville 12 km · Richmond Hill 15 km · Stouffville 18 km · Vaughan 18 km · Markham 22 km · Hillcrest Village 23 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 Aurora (44.0001°, -79.4663°, elevation 266 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).