Hamilton weather in October

In October, Hamilton sees average daytime highs of 15°C and overnight lows near 8°C, with 85 mm of rain across 11 wet days and about 10.8 hours of daylight. It is the 6th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 11°C by the end. The sky is clear or mostly clear about 24% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 30 min at the start of October to 10 h 06 min by month's end. Set against the rest of the year, October is Hamilton's 6th-clearest and 5th-windiest month. For the whole year in context, see Hamilton's year-round climate.

Daytime high
15°
6th warmest
Overnight low
7th coldest
Rainfall
85 mm
11 wet days
Daylight
10 h 48 min
6:41 AM – 5:28 PM
Cloud cover
64%
6th clearest
Wind
15 km/h
5th windiest
Solar energy
2.7 kWh/m²
Travel score
4.2
out of 10

Hamilton is city in Ontario, Canada.

Air quality
Good
PM2.5 8.5 µg/m³ · 2019
Founded
1846

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 18°C in the first days to 11°C by the end.

A typical October day in Hamilton reaches about 15°C in the afternoon and slips back to 8°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 20°C. Set against its neighbours, October runs about 7°C cooler than September and about 7°C warmer than November.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11811
21811
31810
41710
51710
61710
71710
8179
9169
10169
11169
12169
13158
14158
15158
16158
17148
18147
19147
20147
21137
22137
23136
24136
25126
26126
27126
28125
29115
30115
31115

How October really feels in Hamilton

Once humidity and wind are folded in, October 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

October sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Hamilton weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -7°7111.48.19.20.0
Feb / -7°568.56.410.20.0
Mar / -3°699.94.511.60.2
Apr11° / 9411.51.813.22.4
May17° / 8311.2014.55.1
Jun22° / 15°8611.6015.16.5
Jul26° / 18°7710014.96.8
Aug25° / 18°699.4013.87.0
Sep21° / 14°779.3012.36.7
Oct15° / 8511010.84.2
Nov / 7910.32.19.51.2
Dec / -3°7110.55.88.90.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 17% of October, with mostly cloudy or overcast conditions the remaining 59%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34654
44555
54654
64654
74555
84555
94555
104555
114456
124456
134456
144357
154258
164159
174060
183961
193961
203862
213862
223664
233664
243664
253664
263565
273565
283565
293565
303565
313565

Chance of precipitation in October

Any precipitation

Hamilton gets around 85 mm of rain over 11 wet days in October. 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 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
237
337
436
536
636
735
835
935
1034
1134
1234
1334
1434
1535
1635
1736
1836
1937
2037
2137
2237
2337
2437
2537
2636
2736
2836
2935
3034
3134

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the dry band about 88% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1721882
2741772
3741772
4761662
5761662
6781552
7791542
8811441
9821341
10831331
11841231
12851131
13871021
1488921
1589911
1691810
1791810
1892710
1992710
2094600
2194600
2295500
2395500
2496400
2596400
2696400
2796400
2897300
2997300
3097300
3197300

Wind in October

Winds average 15 km/h in October.

Across October, daily wind ranges from about 14 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 30 min at the start of October to 10 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over October. Sunrise moves from 6:22 AM to 7:00 AM, and sunset from 5:54 PM to 5:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:225:54
211.56:245:53
311.46:255:51
411.46:265:49
511.36:275:47
611.36:285:45
711.26:305:44
811.26:315:42
911.16:325:40
1011.16:335:38
1111.06:345:37
1211.06:365:35
1310.96:375:33
1410.96:385:31
1510.86:395:30
1610.86:415:28
1710.76:425:27
1810.76:435:25
1910.66:445:23
2010.66:465:22
2110.66:475:20
2210.56:485:19
2310.56:505:17
2410.46:515:16
2510.46:525:14
2610.36:535:13
2710.36:555:11
2810.26:565:10
2910.26:575:09
3010.16:595:07
3110.17:005:06

Solar energy in October

Daily solar energy (kWh/m²)

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

For context, solar energy here swings from a low near 1.32 kWh/m² to a high of 6.31 kWh/m² in June across the year — October's 2.7 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.4Moderate
23.4Moderate
33.3Moderate
43.3Moderate
53.3Moderate
63.2Moderate
73.2Moderate
83.1Moderate
93.1Moderate
103.0Moderate
113.0Moderate
122.9Moderate
132.9Moderate
142.8Moderate
152.8Moderate
162.7Moderate
172.6Moderate
182.6Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.4Moderate
232.4Moderate
242.3Moderate
252.3Moderate
262.3Moderate
272.2Moderate
282.2Moderate
292.2Moderate
302.1Moderate
312.1Moderate
Planning a trip in October

Is October a good time to visit Hamilton?

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

4.2
Sightseeing
6th-best month of the year
0.5
Beach & pool
6th-best month of the year

October is a reasonable time to visit Hamilton for sightseeing.

What to pack for Hamilton in October

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

In October, Hamilton sees daytime highs around 15°C and nights near 8°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Hamilton in October

The nearest coast averages about 13°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 23 km away) is warmest in August at about 21°C and coldest in February near 3°C.

It's comfortable for a long swim from Jul 22 to Sep 1 — about 1.4 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr4Bracing
May8Bracing
Jun15Cool
Jul20Cool
Aug21Refreshing
Sep19Cool
Oct13Bracing
Nov8Bracing
Dec5Bracing

UV index in Hamilton in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks 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 Hamilton peaks around June 22 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 22UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May6High
Jun8Very high
Jul8Very high
Aug7High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Hamilton?

Hamilton sits at 43.3°N, 79.8°W, 95 m above sea level, in Canada. The nearest listed city is Stoney Creek, 8.0 km away.

Topography around Hamilton

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

Within 3 km, the terrain around Hamilton has only modest variations in elevation — a maximum elevation change of 144 m around an average of 125 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 235 m; within 80 km, significant variations in elevation — a maximum elevation change of 457 m.

The land around Hamilton is covered by artificial surfaces (66%) and trees (25%) within 3 km, trees (28%) and cropland (20%) within 16 km, and cropland (31%), water (29%) and trees (22%) within 80 km.

3 km
144 m
16 km
235 m
80 km
457 m
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Stoney Creek 8.0 km · Waterdown 10 km · Ancaster 12 km · Burlington 15 km · Grimsby 24 km · Oakville 26 km · Milton 30 km · Brantford 36 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 Hamilton (43.2501°, -79.8496°, elevation 95 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).