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Hamilton weather

Ontario · 569,353 inhabitants · Thursday, October 29 · updated 16:20

Rain around 17:00 Air: Fair

19°

Rain showers

Feels like 19°C

Wind

26 km/h

Gusts

48 km/h

Humidity

57 %

Pressure

1014 hPa

Clouds

57 %

Storm

Rise 07:50 Set 18:15 Day 10 h 24 min UV 4 · Moderate

Morning, afternoon, evening

Trend

Afternoon

Rain showers

20°19°

Feels like 20°

Wind ↑ SW 27 km/h

Gusts 48 km/h

Humidity 61 %

💧 0.2 mm

Evening

Rain showers

17°16°

Feels like 17°

Wind ↑ WSW 17 km/h

Gusts 35 km/h

Humidity 78 %

💧 0.8 mm

17:00

19°

0.2mm

SW 26

Hamilton forecast in charts · next 7 days

The week ahead: highs and lows

▲ This week runs +6.4° warmer than usual

Highs Lows Usual for the season (1991–2020 average)

Hourly detail

Temperature (°C) Rain (mm) Wind (km/h)

Hamilton climate: what a normal year looks like

The hottest stretch is July, when afternoons average 26 °C; the coldest is January, when nights average −7 °C. Between those two months the average temperature changes by 26 °C.

Nights typically freeze from December to March, the coldest averaging −7 °C in February.

From 15 h 23 min of daylight in late June to 8 h 58 min in late December.

There is no real dry season: monthly rainfall stays between 61 mm and 95 mm on average.

Forecast highs for the coming week average 17 °C, 3 °C warmer than a normal October (14 °C).

30-year averages (1991–2020)
Month	Typical high	Typical low	Rainfall
Jan	−1 °C	−7 °C	77 mm
Feb	0 °C	−7 °C	61 mm
Mar	5 °C	−3 °C	72 mm
Apr	11 °C	2 °C	95 mm
May	18 °C	9 °C	88 mm
Jun	23 °C	14 °C	93 mm
Jul	26 °C	18 °C	83 mm
Aug	25 °C	17 °C	76 mm
Sep	22 °C	13 °C	79 mm
Oct	14 °C	7 °C	86 mm
Nov	8 °C	2 °C	80 mm
Dec	2 °C	−3 °C	75 mm
Whole year	13 °C	5 °C	960 mm

Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 43.25° N, 79.85° W, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.

Air you breathe in Hamilton: pollution and pollen

2/6

Fair

European Air Quality Index (EAQI), from Copernicus CAMS

PM2.518µg/m³

PM1018µg/m³

Copernicus CAMS model, updated several times a day.

Rain radar around Hamilton

Rain observed over the last two hours by official weather radars around Hamilton, followed by the radar forecast for the next hour where the weather service provides one.

Full-screen rain radar and next-hour rain on RainAtlas

Rain radar Last two hours, then forecast where available · drag the timeline

Moon over Hamilton

Waning gibbous

87 % illuminated · 18.3 days

Rise 16:25 Set 08:15

Fri 30/10 79%

Sat 31/10 69%

Sun 1/11 59%

Mon 2/11 49% Last quarter

Tue 3/11 38%

Wed 4/11 28%

Thu 5/11 19%

Fri 6/11 12%

Sat 7/11 6%

Sun 8/11 2%

Mon 9/11 0%

Tue 10/11 1% New moon

Moonrise and moonset in local time (America/Toronto); phase and lit fraction from a synodic calculation.

Look up a past day in Hamilton

Curious about the weather in Hamilton on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.

Hamilton weather at a glance

This page gathers everything about the weather in Hamilton, Ontario: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “rain showers”, it is 19 °C (feels like 19 °C) and the wind blows at 26 km/h.

Expected range today: 12 °C to 20 °C and a dry sky. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.

Other big cities nearby

Mississauga 40 km 20°

Hamilton weather data for developers

Use the Hamilton forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.

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Where does this forecast come from? Our engine, checked every day against 1125 weather stations