Mount Pearl weather in September

In September, Mount Pearl sees average daytime highs of 16°C and overnight lows near 10°C, with 93 mm of rain across 10.7 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 14°C by the end. The sky is clear or mostly clear about 22% 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 Mount Pearl's 1st-clearest and 8th-windiest month. For the whole year in context, see Mount Pearl's year-round climate.

Daytime high
16°
3rd warmest
Overnight low
10°
10th coldest
Rainfall
93 mm
10.7 wet days
Daylight
12 h 18 min
5:45 AM – 6:06 PM
Cloud cover
68%
1st clearest
Wind
18 km/h
8th windiest
Solar energy
3.37 kWh/m²
Travel score
4.7
out of 10

Mount Pearl is city in Newfoundland and Labrador, Canada.

Air quality
Excellent
PM2.5 5 µg/m³ · 2019
Density
1,426/km²
people per km²
Founded
1834

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 18°C in the first days to 14°C by the end.

A typical September day in Mount Pearl reaches about 16°C in the afternoon and slips back to 10°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 20°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11812
21812
31812
41712
51711
61711
71711
81711
91711
101711
111711
121711
131610
141610
151610
161610
171610
181610
191610
201510
211510
22159
23159
24159
25159
26159
27149
28149
29149
30148

How September really feels in Mount Pearl

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.

Mount Pearl weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-0° / -6°12514.411.68.70.0
Feb-1° / -7°10312.8109.90.0
Mar / -5°10512.98.711.60.0
Apr / -1°8712.25.413.30.1
May / 7211.21.214.91.6
Jun13° / 6610.6015.73.5
Jul18° / 12°7810.5015.45.6
Aug19° / 13°8010.4014.15.9
Sep16° / 10°9310.7012.44.7
Oct11° / 10512.50.310.62.4
Nov / 11013.639.10.6
Dec / -3°12715.38.88.30.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13763
23664
33664
43862
53763
63763
73763
83664
93763
103763
113763
123664
133664
143664
153664
163664
173763
183565
193565
203565
213466
223466
233466
243367
253367
263367
273367
283268
293268
303268

Chance of precipitation in September

Any precipitation

Mount Pearl gets around 93 mm of rain over 10.7 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 36% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
137
238
338
438
538
637
737
837
937
1037
1137
1237
1337
1437
1537
1637
1737
1837
1936
2036
2136
2236
2335
2435
2535
2635
2735
2835
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 75% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16028111
26127111
36326101
46326101
5652591
6662491
7662491
8682381
9682381
10692281
11702271
12712171
13732061
14732061
15751951
16761851
17771850
18791740
19801640
20801640
21821530
22831430
23831430
24831430
25841330
26841330
27851230
28871120
29871120
30881020

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light 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 5:25 AM to 6:05 AM, and sunset from 6:37 PM to 5:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:256:37
213.15:266:35
313.15:276:33
413.05:296:31
513.05:306:29
612.95:326:27
712.95:336:25
812.85:346:23
912.75:366:20
1012.75:376:18
1112.65:386:16
1212.65:406:14
1312.55:416:12
1412.55:436:10
1512.45:446:08
1612.35:456:06
1712.35:476:03
1812.25:486:01
1912.25:495:59
2012.15:515:57
2112.05:525:55
2212.05:545:53
2311.95:555:51
2411.95:565:49
2511.85:585:46
2611.85:595:44
2711.76:015:42
2811.66:025:40
2911.66:045:38
3011.56:055:36

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.37 kWh/m².

For context, solar energy here swings from a low near 0.93 kWh/m² to a high of 5.18 kWh/m² in July across the year — September's 3.37 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.9Moderate
23.8Moderate
33.8Moderate
43.8Moderate
53.7Moderate
63.7Moderate
73.7Moderate
83.6Moderate
93.6Moderate
103.6Moderate
113.5Moderate
123.5Moderate
133.5Moderate
143.4Moderate
153.4Moderate
163.3Moderate
173.3Moderate
183.3Moderate
193.2Moderate
203.2Moderate
213.1Moderate
223.1Moderate
233.1Moderate
243.0Moderate
253.0Moderate
262.9Moderate
272.9Moderate
282.9Moderate
292.8Moderate
302.8Moderate
Planning a trip in September

Is September a good time to visit Mount Pearl?

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

4.7
Sightseeing
3rd-best month of the year
0.7
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Mount Pearl for sightseeing.

What to pack for Mount Pearl in September

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

In September, Mount Pearl sees daytime highs around 16°C and nights near 10°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Mount Pearl in September

The nearest coast averages about 12°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 14 km away) is warmest in August at about 14°C and coldest in March near -0°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°5°10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan1Bracing
Feb0Bracing
Mar0Bracing
Apr1Bracing
May3Bracing
Jun6Bracing
Jul11Bracing
Aug14Bracing
Sep12Bracing
Oct9Bracing
Nov6Bracing
Dec3Bracing

UV index in Mount Pearl in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mount Pearl peaks around June 14 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 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 14UV 8Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May7Very high
Jun8Very high
Jul7High
Aug6High
Sep4Moderate
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Mount Pearl?

Mount Pearl sits at 47.5°N, 52.8°W, 109 m above sea level, in Canada. The nearest listed city is St. John's, 8.0 km away.

Corner BrookGlace BaySydneyNew Glasgow

Topography around Mount Pearl

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

Within 3 km, the terrain around Mount Pearl has only modest variations in elevation — a maximum elevation change of 224 m around an average of 134 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 270 m; within 80 km, significant variations in elevation — a maximum elevation change of 327 m.

The land around Mount Pearl is covered by trees (43%), grassland (28%) and artificial surfaces (27%) within 3 km, trees (48%) and water (31%) within 16 km, and water (56%) and trees (26%) within 80 km.

3 km
224 m
16 km
270 m
80 km
327 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: St. John's 8.0 km · Paradise 8.0 km · Conception Bay South 16 km · Saint-Pierre 270 km · Corner Brook 415 km · Glace Bay 565 km · Sydney 583 km · New Glasgow 784 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 Mount Pearl (47.5166°, -52.7814°, elevation 109 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).