Fergus weather in September

In September, Fergus sees average daytime highs of 20°C and overnight lows near 10°C, with 79 mm of rain across 10 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 22°C in the first days to 17°C 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 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 Fergus's 3rd-clearest and 10th-windiest month. For the whole year in context, see Fergus's year-round climate.

Daytime high
20°
4th warmest
Overnight low
10°
9th coldest
Rainfall
79 mm
10 wet days
Daylight
12 h 18 min
6:07 AM – 6:25 PM
Cloud cover
58%
3rd clearest
Wind
12 km/h
10th windiest
Solar energy
4.06 kWh/m²
Travel score
6.2
out of 10

Fergus is town in Wellington 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 22°C in the first days to 17°C by the end.

A typical September day in Fergus reaches about 20°C in the afternoon and slips back to 10°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 26°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)
12312
22212
32212
42212
52212
62212
72212
82111
92111
102111
112111
122111
132110
142010
152010
162010
172010
18209
19199
20199
21199
22199
23188
24188
25188
26188
27178
28177
29177
30177

How September really feels in Fergus

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.

Fergus 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 (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-3° / -11°6711.8129.10.0
Feb-2° / -11°549.18.810.20.0
Mar / -6°6210.46.611.60.2
Apr11° / 86123.213.22.5
May18° / 8911.90.114.55.3
Jun23° / 12°9611.6015.26.5
Jul25° / 15°8411.1014.96.8
Aug24° / 14°7710.5013.86.9
Sep20° / 10°7910012.36.2
Oct13° / 8211.70.710.83.3
Nov / -2°7611.75.39.50.4
Dec-0° / -7°6511.910.68.80.0

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 19% of September, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25545
35545
45446
55446
65347
75347
85248
95149
105050
115050
124951
134951
145050
155050
165050
174951
185050
195050
205050
214951
224951
234852
244852
254753
264753
274753
284456
294456
304456

Chance of precipitation in September

Any precipitation

Fergus gets around 79 mm of rain over 10 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 33% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
132
232
332
433
533
633
733
833
933
1033
1133
1232
1332
1432
1531
1631
1731
1831
1931
2031
2132
2232
2333
2434
2535
2636
2737
2838
2938
3038

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 68% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14924188
25124178
35224168
45423157
55523157
65623147
75922136
85922136
96022126
106122125
116222115
126322114
136521104
146521104
156720103
166720103
17701992
18711892
19721792
20731692
21761581
22761581
23781471
24791371
25801361
26811261
27831151
28831151
29841141
30851041

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

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 5:50 AM to 6:24 AM, and sunset from 6:53 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:506:53
213.05:516:51
313.05:526:49
412.95:536:47
512.95:546:46
612.85:556:44
712.85:576:42
812.75:586:40
912.75:596:38
1012.66:006:36
1112.66:016:34
1212.56:026:32
1312.46:036:30
1412.46:056:29
1512.36:066:27
1612.36:076:25
1712.26:086:23
1812.26:096:21
1912.16:106:19
2012.16:126:17
2112.06:136:15
2212.06:146:13
2311.96:156:11
2411.96:166:09
2511.86:186:08
2611.86:196:06
2711.76:206:04
2811.76:216:02
2911.66:226:00
3011.66:245:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.06 kWh/m².

For context, solar energy here swings from a low near 1.26 kWh/m² to a high of 6.25 kWh/m² in June across the year — September's 4.06 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.6Bright
34.6Bright
44.5Bright
54.5Bright
64.5Bright
74.4Bright
84.4Bright
94.3Bright
104.3Bright
114.2Bright
124.2Bright
134.2Bright
144.1Bright
154.1Bright
164.0Bright
174.0Moderate
184.0Moderate
193.9Moderate
203.9Moderate
213.8Moderate
223.8Moderate
233.7Moderate
243.7Moderate
253.6Moderate
263.6Moderate
273.5Moderate
283.5Moderate
293.4Moderate
303.4Moderate
Planning a trip in September

Is September a good time to visit Fergus?

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

6.2
Sightseeing
4th-best month of the year
3.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Fergus for sightseeing.

What to pack for Fergus in September

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

In September, Fergus sees daytime highs around 20°C and nights near 10°C. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in Fergus 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 Fergus peaks around June 22 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 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 9Jan 11UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May6High
Jun9Very high
Jul8Very high
Aug7High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Fergus 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 Fergus is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1515 µg/m³Nov 218 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar13Moderate
Apr13Moderate
May14Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep13Moderate
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Fergus?

Fergus sits at 43.7°N, 80.4°W, 400 m above sea level, in Canada. The nearest listed city is Guelph, 20 km away.

Topography around Fergus

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

Within 3 km, the terrain around Fergus has only modest variations in elevation — a maximum elevation change of 58 m around an average of 416 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 177 m; within 80 km, significant variations in elevation — a maximum elevation change of 473 m.

The land around Fergus is covered by cropland (43%) and trees (30%) within 3 km, cropland (60%) and trees (28%) within 16 km, and cropland (49%) and trees (30%) within 80 km.

3 km
58 m
16 km
177 m
80 km
473 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Guelph 20 km · Waterloo 29 km · Hespeler 31 km · Orangeville 32 km · Kitchener 33 km · Forest Heights 34 km · Fiddlesticks 35 km · Caledon 36 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 Fergus (43.706°, -80.3776°, elevation 400 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. 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).