Niagara Falls weather in August

In August, Niagara Falls sees average daytime highs of 25°C and overnight lows near 18°C, with 86 mm of rain across 11 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 36% 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 Niagara Falls's 1st-clearest and 12th-windiest month. For the whole year in context, see Niagara Falls's year-round climate.

Daytime high
25°
2nd warmest
Overnight low
18°
11th coldest
Rainfall
86 mm
11 wet days
Daylight
13 h 48 min
5:27 AM – 7:14 PM
Cloud cover
52%
1st clearest
Wind
12 km/h
12th windiest
Solar energy
5.35 kWh/m²
Travel score
6.8
out of 10

Niagara Falls is city located in the province of Ontario, Canada.

Density
476/km²
people per km²
Founded
1903

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 25°C through the month.

A typical August day in Niagara Falls reaches about 25°C in the afternoon and slips back to 18°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 28°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12519
22519
32519
42519
52519
62519
72519
82519
92519
102519
112519
122519
132518
142518
152518
162518
172518
182518
192518
202418
212418
222418
232418
242418
252418
262418
272418
282417
292417
302417
312417

How August really feels in Niagara Falls

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 Falls weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-0° / -6°7412.5109.20.0
Feb / -6°6010.27.910.20.0
Mar / -3°7511.45.611.60.2
Apr11° / 9512.21.913.12.5
May18° / 10°8712.4014.45.2
Jun23° / 16°10012.3015.16.5
Jul25° / 19°10312.6014.96.5
Aug25° / 18°8611013.86.8
Sep21° / 14°8510.4012.36.5
Oct14° / 9312.60.110.84.0
Nov / 7911.83.19.51.3
Dec / -2°7812.87.48.90.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% 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 39%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26139
36139
46238
56238
66238
76238
86238
96238
106337
116238
126238
136337
146238
156238
166139
176238
186139
196139
206040
216040
225941
235941
245842
255842
265842
275842
285941
295842
305842
315842

Chance of precipitation in August

Any precipitation

Niagara Falls gets around 86 mm of rain over 11 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
341
440
540
640
739
839
939
1039
1139
1238
1338
1438
1538
1637
1737
1836
1936
2035
2135
2234
2333
2433
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 33% of days. Sticky, muggy-or-worse air turns up on roughly 30% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1102034279
2102034279
3102034279
4102134269
5102134269
6102133269
7112133268
8112233268
9112233268
10122333257
11122333257
12122333256
13122433256
14122433255
15122434255
16132434254
17132434254
18132434244
19132534243
20142534243
21142534243
22152533243
23152533243
24162632233
25172631233
26172631233
27182730223
28182729223
29192729213
30202828213
31212827203

Wind in August

Winds average 12 km/h in August, the calmest month.

Across August, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light 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 5:11 AM to 5:44 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)
114.45:117:34
214.45:127:33
314.35:137:32
414.35:147:31
514.25:157:29
614.25:167:28
714.25:177:27
814.15:187:25
914.15:197:24
1014.05:207:23
1114.05:217:21
1214.05:227:20
1313.95:247:18
1413.95:257:17
1513.85:267:15
1613.85:277:14
1713.75:287:12
1813.75:297:11
1913.65:307:09
2013.65:317:07
2113.65:337:06
2213.55:347:04
2313.55:357:03
2413.45:367:01
2513.45:376:59
2613.35:386:57
2713.35:396:56
2813.25:406:54
2913.25:426:52
3013.15:436:51
3113.15:446:49

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.35 kWh/m².

For context, solar energy here swings from a low near 1.28 kWh/m² to a high of 6.33 kWh/m² in June across the year — August's 5.35 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.6Bright
85.6Bright
95.6Bright
105.5Bright
115.5Bright
125.5Bright
135.4Bright
145.4Bright
155.4Bright
165.3Bright
175.3Bright
185.3Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.1Bright
245.1Bright
255.0Bright
265.0Bright
275.0Bright
284.9Bright
294.9Bright
304.9Bright
314.8Bright
Planning a trip in August

Is August a good time to visit Niagara Falls?

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

6.8
Sightseeing
1st-best month of the year
6.0
Beach & pool
1st-best month of the year

August is a reasonable time to visit Niagara Falls for sightseeing.

What to pack for Niagara Falls in August

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

In August, Niagara Falls sees daytime highs around 25°C and nights near 18°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Niagara Falls 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 at the nearest coast (about 25 km away) 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 Niagara Falls 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 Falls peaks around June 19 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. 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 19UV 8Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May6High
Jun8Very high
Jul7Very high
Aug6High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Niagara Falls?

Niagara Falls sits at 43.1°N, 79.1°W, 184 m above sea level, in Canada. The nearest listed city is Niagara Falls, 1.0 km away.

Topography around Niagara Falls

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

Within 3 km, the terrain around Niagara Falls has only modest variations in elevation — a maximum elevation change of 133 m around an average of 176 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 145 m; within 80 km, significant variations in elevation — a maximum elevation change of 557 m.

The land around Niagara Falls is covered by artificial surfaces (47%) and trees (24%) within 3 km, trees (34%) and grassland (27%) within 16 km, and water (41%) and trees (28%) within 80 km.

3 km
133 m
16 km
145 m
80 km
557 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Niagara Falls 1.0 km · Thorold 11 km · Grand Island 11 km · St. Catharines 16 km · Niagara-on-the-Lake 17 km · North Tonawanda 18 km · Welland 20 km · Kenmore 22 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 Falls (43.1001°, -79.0663°, elevation 184 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).