Brockville weather in August

In August, Brockville sees average daytime highs of 25°C and overnight lows near 16°C, with 95 mm of rain across 11.6 wet days and about 13.9 hours of daylight. It is the 2nd-warmest and 5th-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 31% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 30 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Brockville's 2nd-clearest and 12th-windiest month. For the whole year in context, see Brockville's year-round climate.

Daytime high
25°
2nd warmest
Overnight low
16°
11th coldest
Rainfall
95 mm
11.6 wet days
Daylight
13 h 54 min
5:11 AM – 7:03 PM
Cloud cover
57%
2nd clearest
Wind
10 km/h
12th windiest
Solar energy
5.12 kWh/m²
Travel score
6.7
out of 10

Brockville is city in Eastern Ontario, Canada.

Founded
1784

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

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 Brockville reaches about 25°C in the afternoon and slips back to 16°C overnight — a 9°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°151015202531
Avg high (°C)Avg low (°C)
12617
22617
32617
42617
52617
62617
72617
82617
92617
102517
112517
122516
132516
142516
152516
162516
172516
182516
192516
202516
212516
222516
232515
242515
252415
262415
272415
282415
292415
302415
312415

How August really feels in Brockville

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.

Brockville weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-3° / -11°7511.89.790.0
Feb-2° / -11°619.68.210.10.0
Mar / -5°7711.36.511.60.2
Apr12° / 10411.92.513.22.8
May19° / 8911.60.114.65.6
Jun23° / 13°10211.6015.36.5
Jul26° / 17°9611.90156.4
Aug25° / 16°9511.6013.96.7
Sep21° / 12°9410012.36.5
Oct14° / 10812.20.310.73.7
Nov / 8811.83.39.40.8
Dec / -5°8512.88.48.70.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 23% of August, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25446
35446
45446
55446
65446
75446
85347
95347
105347
115347
125347
135347
145347
155347
165347
175347
185347
195347
205347
215347
225347
235347
245446
255446
265446
275446
285347
295347
305248
315248

Chance of precipitation in August

Any precipitation

Brockville gets around 95 mm of rain over 11.6 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 37% 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
441
541
641
741
841
941
1041
1140
1240
1340
1439
1539
1638
1738
1837
1937
2036
2135
2234
2333
2433
2532
2631
2731
2830
2930
3030
3130

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 24% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1112634253
2112734263
3122633253
4122633263
5122632263
6132632263
7132532263
8142532253
9142532253
10152433253
11162433253
12162333243
13172334243
14182334232
15182334232
16192235222
17192235222
18202335212
19202335211
20212334201
21212434201
22222433191
23232532191
24232532191
25242631191
26252730181
27252729181
28262828171
29262927171
30272926171
31283025161

Wind in August

Winds average 10 km/h in August, the calmest month.

Across August, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 30 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 84 minutes over August. Sunrise moves from 4:53 AM to 5:29 AM, and sunset from 7:25 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.54:537:25
214.54:547:23
314.44:557:22
414.44:567:21
514.44:587:19
614.34:597:18
714.35:007:17
814.25:017:15
914.25:027:14
1014.25:037:12
1114.15:057:11
1214.15:067:09
1314.05:077:08
1414.05:087:06
1513.95:097:05
1613.95:117:03
1713.85:127:02
1813.85:137:00
1913.75:146:58
2013.75:156:57
2113.65:176:55
2213.65:186:53
2313.55:196:51
2413.55:206:50
2513.45:216:48
2613.45:236:46
2713.35:246:44
2813.35:256:42
2913.25:266:41
3013.25:276:39
3113.15:296:37

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.12 kWh/m².

For context, solar energy here swings from a low near 1.2 kWh/m² to a high of 5.97 kWh/m² in June across the year — August's 5.12 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.4Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.0Bright
215.0Bright
225.0Bright
234.9Bright
244.9Bright
254.9Bright
264.8Bright
274.8Bright
284.8Bright
294.7Bright
304.7Bright
314.6Bright
Planning a trip in August

Hazard calendar for Brockville

In seasonPeak

In August, Brockville sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Brockville sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Brockville?

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

6.7
Sightseeing
1st-best month of the year
6.0
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Brockville for sightseeing.

What to pack for Brockville in August

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

In August, Brockville sees daytime highs around 25°C and nights near 16°C. Worth packing: light clothes, rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in Brockville in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Brockville peaks around July 13 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 13UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr5Moderate
May7High
Jun7High
Jul8Very high
Aug5Moderate
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Brockville?

Brockville sits at 44.6°N, 75.7°W, 93 m above sea level, in Canada. The nearest listed city is Watertown, 71 km away.

Topography around Brockville

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

Within 3 km, the terrain around Brockville has only modest variations in elevation — a maximum elevation change of 59 m around an average of 92 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 81 m; within 80 km, significant variations in elevation — a maximum elevation change of 597 m.

The land around Brockville is covered by trees (37%) and water (31%) within 3 km, trees (51%) within 16 km, and trees (63%) within 80 km.

3 km
59 m
16 km
81 m
80 km
597 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Watertown 71 km · Kingston 75 km · Stittsville 75 km · Bridlewood 78 km · Kanata 81 km · Nepean 83 km · Gloucester 84 km · Alta Vista 88 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 Brockville (44.5913°, -75.687°, elevation 93 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).