Niagara weather in August

In August, Niagara sees average daytime highs of 25°C and overnight lows near 16°C, with 66 mm of rain across 8.8 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 24°C by the end. The sky is clear or mostly clear about 35% of the time in August, and the air most often feels comfortable.

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 Niagara's 2nd-clearest and 12th-windiest month. For the whole year in context, see Niagara's year-round climate.

Daytime high
25°
2nd warmest
Overnight low
16°
11th coldest
Rainfall
66 mm
8.8 wet days
Daylight
13 h 48 min
5:27 AM – 7:16 PM
Cloud cover
54%
2nd clearest
Wind
11 km/h
12th windiest
Solar energy
5.3 kWh/m²
Travel score
7.1
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 26°C in the first days to 24°C by the end.

A typical August day in Niagara reaches about 25°C in the afternoon and slips back to 16°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 29°C. Set against its neighbours, August runs about 1°C cooler than July and about 4°C warmer than September.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12617
22617
32617
42616
52616
62616
72616
82616
92616
102616
112616
122616
132516
142516
152516
162516
172516
182516
192516
202516
212516
222516
232515
242515
252515
262515
272515
282415
292415
302415
312415

How August really feels in Niagara

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.

Niagara weather by month

How August compares with the rest of the year at a glance. August is the 2nd-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° / -8°6010.27.29.10.0
Feb-0° / -8°497.86.110.20.0
Mar / -4°579.54.511.60.3
Apr11° / 7710.71.813.22.7
May18° / 7210.1014.55.5
Jun23° / 13°7710.6015.26.7
Jul26° / 16°719.7014.96.8
Aug25° / 16°668.8013.87.1
Sep21° / 12°698.7012.36.7
Oct14° / 7510.50.110.84.1
Nov / 67102.59.51.0
Dec / -4°61105.88.80.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 22% of August, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25743
35743
45743
55743
65743
75743
85743
95743
105743
115743
125743
135743
145644
155644
165644
175644
185644
195644
205644
215644
225644
235545
245644
255644
265644
275644
285644
295644
305644
315644

Chance of precipitation in August

Any precipitation

Niagara gets around 66 mm of rain over 8.8 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 29% and peaks near 33% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
133
233
333
433
533
633
733
833
932
1032
1131
1231
1330
1430
1529
1629
1728
1827
1927
2026
2126
2225
2325
2424
2524
2624
2724
2824
2924
3025
3125

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1182930212
2182929212
3192929212
4192928222
5192928222
6202928222
7202927222
8212927212
9212927212
10222927212
11222927202
12222927202
13232927202
14232927192
15232927192
16232928182
17242928182
18242928182
19242928182
20242928182
21252827182
22252927182
23262927171
24262927171
25272926171
26282926171
27282925171
28292925162
29302924162
30312824152
31322823152

Wind in August

Winds average 11 km/h in August, the calmest month.

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

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

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 5:10 AM to 5:45 AM, and sunset from 7:37 PM to 6:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.45:107:37
214.45:127:36
314.45:137:34
414.35:147:33
514.35:157:32
614.25:167:31
714.25:177:29
814.25:187:28
914.15:197:27
1014.15:207:25
1114.05:227:24
1214.05:237:22
1313.95:247:21
1413.95:257:19
1513.95:267:18
1613.85:277:16
1713.85:287:15
1813.75:307:13
1913.75:317:11
2013.65:327:10
2113.65:337:08
2213.55:347:06
2313.55:357:05
2413.45:377:03
2513.45:387:01
2613.35:397:00
2713.35:406:58
2813.25:416:56
2913.25:426:54
3013.25:436:53
3113.15:456:51

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.3 kWh/m².

For context, solar energy here swings from a low near 1.32 kWh/m² to a high of 6.28 kWh/m² in June across the year — August's 5.3 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.7Bright
35.7Bright
45.7Bright
55.6Bright
65.6Bright
75.6Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.4Bright
135.4Bright
145.4Bright
155.3Bright
165.3Bright
175.3Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.1Bright
235.1Bright
245.0Bright
255.0Bright
265.0Bright
274.9Bright
284.9Bright
294.9Bright
304.8Bright
314.8Bright
Planning a trip in August

Is August a good time to visit Niagara?

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

7.1
Sightseeing
1st-best month of the year
6.4
Beach & pool
2nd-best month of the year

August is one of the better times to visit Niagara for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Niagara in August

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

In August, Niagara sees daytime highs around 25°C and nights near 16°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Niagara in August

The nearest coast averages about 21°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 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 Niagara 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 Niagara peaks around June 21 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May6High
Jun8Very high
Jul8Very high
Aug6High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Niagara 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 Niagara is worst in May — around 22 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMay 2021 µg/m³Dec 1010 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb15Moderate
Mar18Moderate
Apr18Moderate
May22Moderate
Jun20Moderate
Jul20Moderate
Aug17Moderate
Sep17Moderate
Oct11Good
Nov10Good
Dec10Good
Location & terrain

Where is Niagara?

Niagara sits at 43.6°N, 79.4°W, 89 m above sea level, in Canada. The nearest listed city is Trinity-Bellwoods, 0.0 km away.

Topography around Niagara

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

Within 3 km, the terrain around Niagara has only modest variations in elevation — a maximum elevation change of 67 m around an average of 93 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 154 m; within 80 km, significant variations in elevation — a maximum elevation change of 520 m.

The land around Niagara is covered by artificial surfaces (63%) and water (22%) within 3 km, water (45%) and artificial surfaces (35%) within 16 km, and water (29%), trees (26%) and cropland (23%) within 80 km.

3 km
67 m
16 km
154 m
80 km
520 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Trinity-Bellwoods 0.0 km · Kensington-Chinatown 1.0 km · Little Portugal 2.0 km · Bay Street Corridor 2.0 km · Waterfront Communities-The Island 3.0 km · South Parkdale 3.0 km · Church-Yonge Corridor 3.0 km · Annex 3.0 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 Niagara (43.6446°, -79.4071°, elevation 89 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).