Port Colborne weather in August

In August, Port Colborne sees average daytime highs of 24°C and overnight lows near 20°C, with 90 mm of rain across 10.9 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 38% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 24 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Port Colborne's 1st-clearest and 12th-windiest month. For the whole year in context, see Port Colborne's year-round climate.

Daytime high
24°
2nd warmest
Overnight low
20°
11th coldest
Rainfall
90 mm
10.9 wet days
Daylight
13 h 48 min
5:28 AM – 7:14 PM
Cloud cover
51%
1st clearest
Wind
14 km/h
12th windiest
Solar energy
5.39 kWh/m²
Travel score
6.9
out of 10

Port Colborne is city in Niagara Region, Ontario, Canada.

Founded
1830

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 24°C through the month.

A typical August day in Port Colborne reaches about 24°C in the afternoon and slips back to 20°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 27°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12520
22520
32520
42520
52520
62520
72520
82520
92520
102520
112520
122420
132420
142420
152420
162420
172420
182420
192419
202419
212419
222419
232419
242419
252419
262419
272419
282419
292319
302319
312318

How August really feels in Port Colborne

Once humidity and wind are folded in, August 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

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Port Colborne weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -6°7712.48.79.20.0
Feb-1° / -6°609.4710.20.0
Mar / -3°7710.94.811.60.0
Apr / 10011.91.813.11.7
May16° / 11°9012.2014.44.8
Jun22° / 17°10312.1015.16.4
Jul25° / 20°10512014.86.7
Aug24° / 20°9010.9013.86.9
Sep21° / 16°9010.3012.36.4
Oct14° / 10°9812.40.110.83.9
Nov / 8511.62.59.51.2
Dec / -1°83126.88.90.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 24% of August, with mostly cloudy or overcast conditions the remaining 38%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26139
36238
46238
56238
66238
76337
86337
96436
106436
116436
126535
136436
146436
156535
166436
176436
186337
196337
206238
216238
226238
236139
246139
256139
266139
276139
286139
296139
305941
315941

Chance of precipitation in August

Any precipitation

Port Colborne gets around 90 mm of rain over 10.9 wet days in August. 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 41% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
141
241
340
440
540
639
739
839
938
1038
1138
1238
1337
1437
1537
1636
1736
1835
1935
2034
2134
2233
2333
2432
2532
2631
2731
2831
2931
3031
3131

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 34% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
19193329101
29193329101
39203328101
49203228101
510203227101
610203227101
710213227101
811213126101
91121322790
101122312690
111122312690
121222312680
131223312680
141223312680
151223312670
161223322670
171223322660
181223322660
191223322660
201323322660
211323322660
221323322660
231424312560
241424312560
251524302560
261524302460
271625302460
281625292460
291725292360
301825282360
311925282260

Wind in August

Winds average 14 km/h in August, the calmest month.

Across August, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 24 min at the start of August to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over August. Sunrise moves from 5:12 AM to 5:45 AM, and sunset from 7:34 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.45:127:34
214.35:137:33
314.35:147:32
414.35:157:31
514.25:167:29
614.25:177:28
714.15:187:27
814.15:197:26
914.15:207:24
1014.05:217:23
1114.05:227:21
1213.95:247:20
1313.95:257:19
1413.95:267:17
1513.85:277:16
1613.85:287:14
1713.75:297:13
1813.75:307:11
1913.65:317:09
2013.65:327:08
2113.55:347:06
2213.55:357:05
2313.55:367:03
2413.45:377:01
2513.45:387:00
2613.35:396:58
2713.35:406:56
2813.25:416:54
2913.25:436:53
3013.15:446:51
3113.15:456:49

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.39 kWh/m².

For context, solar energy here swings from a low near 1.27 kWh/m² to a high of 6.37 kWh/m² in June across the year — August's 5.39 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.7Bright
65.7Bright
75.7Bright
85.6Bright
95.6Bright
105.6Bright
115.5Bright
125.5Bright
135.5Bright
145.4Bright
155.4Bright
165.4Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.2Bright
225.2Bright
235.2Bright
245.1Bright
255.1Bright
265.0Bright
275.0Bright
285.0Bright
294.9Bright
304.9Bright
314.8Bright
Planning a trip in August

Is August a good time to visit Port Colborne?

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

6.9
Sightseeing
1st-best month of the year
5.9
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Port Colborne for sightseeing.

What to pack for Port Colborne in August

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

In August, Port Colborne sees daytime highs around 24°C and nights near 20°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Port Colborne in August

The nearest coast averages about 23°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 23°C and coldest in February near 1°C.

It's comfortable for a long swim from Jul 4 to Sep 20 — about 2.6 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan3Bracing
Feb1Bracing
Mar1Bracing
Apr3Bracing
May9Bracing
Jun17Cool
Jul22Refreshing
Aug23Refreshing
Sep21Refreshing
Oct16Cool
Nov10Bracing
Dec6Bracing

UV index in Port Colborne in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Port Colborne peaks around June 21 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 21UV 8Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May7High
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Port Colborne in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Port Colborne is worst in July — around 15 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1315 µg/m³Nov 177 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar12Good
Apr12Moderate
May14Moderate
Jun15Moderate
Jul15Moderate
Aug13Moderate
Sep11Good
Oct7Good
Nov7Good
Dec7Good
Location & terrain

Where is Port Colborne?

Port Colborne sits at 42.9°N, 79.2°W, 188 m above sea level, in Canada. The nearest listed city is Welland, 9.0 km away.

Topography around Port Colborne

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

Within 3 km, the terrain around Port Colborne has only modest variations in elevation — a maximum elevation change of 39 m around an average of 180 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 100 m; within 80 km, large variations in elevation — a maximum elevation change of 646 m.

The land around Port Colborne is covered by grassland (28%) and trees (25%) within 3 km, water (37%), trees (24%) and cropland (20%) within 16 km, and water (38%) and trees (32%) within 80 km.

3 km
39 m
16 km
100 m
80 km
646 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Welland 9.0 km · Thorold 24 km · Fort Erie 24 km · Niagara Falls 26 km · Niagara Falls 26 km · Grand Island 27 km · Buffalo 29 km · St. Catharines 30 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 Port Colborne (42.9001°, -79.2329°, 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).