Keswick in Fall

In fall (September, October and November), Keswick sees average daytime highs around 13°C and overnight lows near 5°C, with 216 mm of precipitation over about 32 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.

Over the season highs ease from about 23°C in early September to 3°C by late November. The sky is clear or mostly clear about 21% of the time across fall, and the air most often feels dry.

Fall is Keswick's 2nd-best season to visit on our travel score. For the whole year in context, see Keswick's year-round climate.

Avg daytime high
13°C
2nd-warmest season
Avg overnight low
5°C
Precipitation
216 mm
32 wet days
Avg wind
13 km/h
Travel score
3.6
2nd-best season
Months
Sep · Oct · Nov

Temperature in Keswick in Fall

Average highAverage lowShaded bands: 10–90% of days

Over the season highs ease from about 23°C in early September to 3°C by late November.

A typical fall day in Keswick reaches about 13°C and drops to 5°C overnight. The warmest of the three months is September, the coolest November.

-10°10°20°30°SepOctNov

How fall really feels in Keswick

Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 37 that feel at or below 0°C.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
37
wind chill below the day's low

The story in fall is cold — wind chill drags the overnight "feels like" below the raw low.

Keswick weather by month

How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.

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 Fall

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time across fall.

0%25%50%75%100%SepOctNov

Chance of precipitation in Fall

Any precipitationSnow

Keswick gets around 216 mm of rain and snow over 32 wet days across fall. The line is the day-by-day chance of measurable precipitation.

0%10%20%30%40%50%SepOctNov

Humidity in Fall

DryComfortableHumidMuggyOppressiveMiserable

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

0%25%50%75%100%SepOctNov

Wind in Fall

Winds average 13 km/h across fall.

05101520SepOctNov

Sunrise & sunset in Fall

DaylightNight

Daylight runs from about 13 h 06 min in early September to 8 h 54 min by late November. The lit band spans sunrise to sunset each day.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMSepOctNov

Solar energy in Fall

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across fall, about 2.7 kWh/m².

024SepOctNov
Planning a trip in fall

Is fall a good time to visit Keswick?

Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

3.6
Sightseeing
2nd-best month of the year
1.3
Beach & pool
2nd-best month of the year

fall is a weaker month for outdoor sightseeing in Keswick.

What to pack for Keswick in Fall

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

In fall, Keswick sees daytime highs around 13°C and nights near 5°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 32 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Keswick in Fall

The nearest coast averages about 13°C across fall — 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 Fall

LowModerateHighVery highExtreme

Clear-sky midday UV across fall averages around 3 — 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 Fall

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where fall 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
Fall 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.