Keswick weather in August

In August, Keswick sees average daytime highs of 25°C and overnight lows near 15°C, with 75 mm of rain across 9.6 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 24°C by the end. The sky is clear or mostly clear about 33% of the time in August, and the air most often feels comfortable.

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

Daytime high
25°
2nd warmest
Overnight low
15°
11th coldest
Rainfall
75 mm
9.6 wet days
Daylight
13 h 54 min
5:26 AM – 7:18 PM
Cloud cover
55%
2nd clearest
Wind
11 km/h
12th windiest
Solar energy
5.27 kWh/m²
Travel score
7.0
out of 10

Keswick is human settlement in Georgina, Ontario, Canada.

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 25°C in the first days to 24°C by the end.

A typical August day in Keswick reaches about 25°C in the afternoon and slips back to 15°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 20°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)
12516
22516
32516
42516
52516
62516
72516
82516
92515
102515
112515
122515
132515
142515
152515
162515
172515
182515
192515
202415
212415
222415
232415
242415
252414
262414
272414
282414
292414
302414
312414

How August really feels in Keswick

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.

Keswick 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-3° / -11°5810.610.19.10.0
Feb-2° / -11°478.47.710.20.0
Mar / -5°569.96.111.60.1
Apr11° / 7610.82.613.22.7
May18° / 8010.8014.55.6
Jun23° / 13°8410.6015.36.7
Jul26° / 16°7810.80156.7
Aug25° / 15°759.6013.87.0
Sep21° / 11°729.6012.36.5
Oct13° / 7611.70.410.83.6
Nov / -1°6810.73.99.40.6
Dec / -6°5710.78.68.70.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% 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 45%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25446
35446
45446
55446
65545
75545
85545
95545
105545
115545
125545
135545
145545
155545
165545
175545
185545
195545
205545
215545
225545
235545
245545
255545
265545
275545
285545
295545
305545
315545

Chance of precipitation in August

Any precipitation

Keswick gets around 75 mm of rain over 9.6 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 31% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
134
234
334
434
534
634
733
833
933
1033
1133
1233
1332
1432
1532
1632
1731
1831
1931
2030
2130
2229
2329
2428
2528
2628
2728
2828
2928
3029
3129

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1193429171
2193528171
3203528171
4203528171
5203428171
6213428171
7213328171
8223328161
9223228161
10233228161
11243228161
12243128161
13253128151
14253128151
15263129141
16263129141
17263129141
18273128141
19273028141
20273028141
21283028141
22293027141
23293027131
24303026131
25313026130
26313025130
27323025130
28333024130
29343023131
30352923121
31362922121

Wind in August

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

Across August, daily wind ranges from about 10 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
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

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 5:09 AM to 5:44 AM, and sunset from 7:39 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.55:097:39
214.55:107:38
314.45:117:36
414.45:127:35
514.35:147:34
614.35:157:32
714.35:167:31
814.25:177:30
914.25:187:28
1014.15:197:27
1114.15:207:25
1214.05:227:24
1314.05:237:22
1413.95:247:21
1513.95:257:19
1613.95:267:18
1713.85:287:16
1813.85:297:14
1913.75:307:13
2013.75:317:11
2113.65:327:09
2213.65:337:08
2313.55:357:06
2413.55:367:04
2513.45:377:02
2613.45:387:01
2713.35:396:59
2813.35:416:57
2913.25:426:55
3013.25:436:54
3113.15:446:52

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.27 kWh/m².

For context, solar energy here swings from a low near 1.28 kWh/m² to a high of 6.25 kWh/m² in June across the year — August's 5.27 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
115.4Bright
125.4Bright
135.4Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.2Bright
195.2Bright
205.2Bright
215.1Bright
225.1Bright
235.0Bright
245.0Bright
255.0Bright
264.9Bright
274.9Bright
284.8Bright
294.8Bright
304.8Bright
314.7Bright
Planning a trip in August

Is August a good time to visit Keswick?

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

7.0
Sightseeing
1st-best month of the year
6.1
Beach & pool
2nd-best month of the year

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

What to pack for Keswick in August

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

In August, Keswick sees daytime highs around 25°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Keswick 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 at the nearest coast (about 63 km away) is warmest in August at about 21°C and coldest in March near 3°C.

It's comfortable for a long swim from Jul 27 to Sep 2 — about 1.2 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr4Bracing
May7Bracing
Jun14Bracing
Jul19Cool
Aug21Refreshing
Sep19Cool
Oct13Bracing
Nov8Bracing
Dec5Bracing

UV index in Keswick 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 Keswick 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 21UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5High
May6High
Jun8Very high
Jul8Very high
Aug6High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Keswick 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 Keswick is worst in May — around 19 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (November, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 2019 µg/m³Nov 239 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar16Moderate
Apr17Moderate
May19Moderate
Jun18Moderate
Jul18Moderate
Aug16Moderate
Sep14Moderate
Oct10Good
Nov9Good
Dec9Good
Location & terrain

Where is Keswick?

Keswick sits at 44.3°N, 79.5°W, 230 m above sea level, in Canada. The nearest listed city is Innisfil, 16 km away.

Topography around Keswick

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

Within 3 km, the terrain around Keswick has only modest variations in elevation — a maximum elevation change of 59 m around an average of 234 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 126 m; within 80 km, significant variations in elevation — a maximum elevation change of 532 m.

The land around Keswick is covered by cropland (29%), trees (25%) and water (24%) within 3 km, trees (34%), cropland (27%) and water (22%) within 16 km, and trees (41%) and cropland (23%) within 80 km.

3 km
59 m
16 km
126 m
80 km
532 m
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Innisfil 16 km · East Gwillimbury 17 km · Newmarket 22 km · Barrie 23 km · Aurora 28 km · Whitchurch-Stouffville 30 km · Uxbridge 33 km · Alliston 34 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 Keswick (44.2501°, -79.4663°, elevation 230 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).