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Now · 8:04 p.m.

Fourth Line Weather & Hourly Forecast

Canada · Ontario

Partly cloudy night
16°C
Partly cloudy night
Feels like: 13°C
💧 Humidity 79% 🌡 Pressure 1020 hPa 💨 Wind 18 km/h 👁 Visibility 8.4 km ☁ Clouds 52% ☀️ UV index 0.0 · Low 🌅 Sunrise 7:19 a.m. 🌇 Sunset 7:21 p.m.

Hourly Forecast for Fourth Line

Today
Mostly clear night · 9:00 p.m. Mostly clear night
16° 💧 0 mm 💨 18 km/h 78%1020 hPa
Tomorrow
Clear night · 12:00 a.m. Clear night
14° 💧 0 mm 💨 11 km/h 81%1020 hPa
Clear night · 3:00 a.m. Clear night
14° 💧 0 mm 💨 10 km/h 87%1019 hPa
Clear night · 6:00 a.m. Clear night
14° 💧 0 mm 💨 12 km/h 90%1018 hPa
Sunny · 9:00 a.m. Sunny
14° 💧 0 mm 💨 12 km/h 87%1018 hPa
Sunny · 12:00 p.m. Sunny
17° 💧 0 mm 💨 16 km/h 81%1018 hPa
Sunny · 3:00 p.m. Sunny
18° 💧 0 mm 💨 23 km/h 80%1016 hPa
Sunny · 6:00 p.m. Sunny
17° 💧 0 mm 💨 23 km/h 85%1016 hPa
Clear night · 9:00 p.m. Clear night
16° 💧 0 mm 💨 19 km/h 90%1016 hPa
Monday
Clear night · 12:00 a.m. Clear night
15° 💧 0 mm 💨 15 km/h 90%1016 hPa
Clear night · 3:00 a.m. Clear night
16° 💧 0 mm 💨 13 km/h 93%1015 hPa
Clear night · 6:00 a.m. Clear night
14° 💧 0 mm 💨 10 km/h 94%1016 hPa
Sunny · 9:00 a.m. Sunny
15° 💧 0 mm 💨 10 km/h 93%1017 hPa
Sunny · 12:00 p.m. Sunny
18° 💧 0 mm 💨 13 km/h 79%1017 hPa
Sunny · 3:00 p.m. Sunny
19° 💧 0 mm 💨 17 km/h 74%1016 hPa
Sunny · 6:00 p.m. Sunny
18° 💧 0 mm 💨 18 km/h 76%1016 hPa

15-Day Weather Outlook for Fourth Line

TomorrowTomorrow Sunny Sunny 18°/13° 💧 0 mm 💨 24 km/h
Monday 28 SeptemberMon 28 Sep. Sunny Sunny 19°/14° 💧 0 mm 💨 19 km/h
Tuesday 29 SeptemberTue 29 Sep. Mostly sunny Mostly sunny 22°/13° 💧 0.0 mm 💨 14 km/h
Wednesday 30 SeptemberWed 30 Sep. Light rain Light rain 19°/16° 💧 8.9 mm 💨 23 km/h
Thursday 1 OctoberThu 1 Oct. Mostly cloudy Mostly cloudy 23°/16° 💧 0.0 mm 💨 15 km/h
Friday 2 OctoberFri 2 Oct. Overcast Overcast 23°/16° 💧 0 mm 💨 6 km/h
Saturday 3 OctoberSat 3 Oct. Moderate rain Moderate rain 19°/15° 💧 16 mm 💨 24 km/h
Sunday 4 OctoberSun 4 Oct. Moderate rain Moderate rain 14°/13° 💧 21 mm 💨 36 km/h
Monday 5 OctoberMon 5 Oct. Mostly sunny Mostly sunny 15°/9° 💧 0.0 mm 💨 22 km/h
Tuesday 6 OctoberTue 6 Oct. Partly cloudy Partly cloudy 17°/7° 💧 0 mm 💨 15 km/h
Wednesday 7 OctoberWed 7 Oct. Moderate rain Moderate rain 18°/10° 💧 3.7 mm 💨 34 km/h
Thursday 8 OctoberThu 8 Oct. Light rain Light rain 12°/9° 💧 8.9 mm 💨 26 km/h
Friday 9 OctoberFri 9 Oct. Partly cloudy Partly cloudy 9°/8° 💧 0.7 mm 💨 26 km/h

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Fourth Line

Vertical axis: °C · Horizontal axis: hours · Color based on temperature
Mostly clear night · 9:00 p.m.
16° Today 9:00 p.m.
Clear night · 10:00 p.m.
16° 10:00 p.m.
Clear night · 11:00 p.m.
15° 11:00 p.m.
Clear night · 12:00 a.m.
14° 12:00 a.m.
Clear night · 1:00 a.m.
14° Tomorrow 1:00 a.m.
Clear night · 2:00 a.m.
14° 2:00 a.m.
Clear night · 3:00 a.m.
14° 3:00 a.m.
Clear night · 4:00 a.m.
14° 4:00 a.m.
Clear night · 5:00 a.m.
14° Tomorrow 5:00 a.m.
Clear night · 6:00 a.m.
14° 6:00 a.m.
Clear night · 7:00 a.m.
13° 7:00 a.m.
Sunny · 8:00 a.m.
13° 8:00 a.m.
Sunny · 9:00 a.m.
14° Tomorrow 9:00 a.m.
Sunny · 10:00 a.m.
15° 10:00 a.m.
Sunny · 11:00 a.m.
16° 11:00 a.m.
Sunny · 12:00 p.m.
17° 12:00 p.m.
Sunny · 1:00 p.m.
17° Tomorrow 1:00 p.m.
Sunny · 2:00 p.m.
18° 2:00 p.m.
Sunny · 3:00 p.m.
18° 3:00 p.m.
Sunny · 4:00 p.m.
18° 4:00 p.m.
Sunny · 5:00 p.m.
17° Tomorrow 5:00 p.m.
Sunny · 6:00 p.m.
17° 6:00 p.m.
Sunny · 7:00 p.m.
16° 7:00 p.m.
Clear night · 8:00 p.m.
16° 8:00 p.m.
Clear night · 9:00 p.m.
16° Tomorrow 9:00 p.m.
Clear night · 10:00 p.m.
16° 10:00 p.m.
Clear night · 11:00 p.m.
16° 11:00 p.m.
Clear night · 12:00 a.m.
15° 12:00 a.m.
Clear night · 1:00 a.m.
16° Monday 1:00 a.m.
Clear night · 2:00 a.m.
16° 2:00 a.m.
Clear night · 3:00 a.m.
16° 3:00 a.m.
Clear night · 4:00 a.m.
15° 4:00 a.m.
Clear night · 5:00 a.m.
15° Monday 5:00 a.m.
Clear night · 6:00 a.m.
14° 6:00 a.m.
Clear night · 7:00 a.m.
14° 7:00 a.m.
Sunny · 8:00 a.m.
14° 8:00 a.m.
Sunny · 9:00 a.m.
15° Monday 9:00 a.m.
Sunny · 10:00 a.m.
16° 10:00 a.m.
Sunny · 11:00 a.m.
17° 11:00 a.m.
Sunny · 12:00 p.m.
18° 12:00 p.m.
Sunny · 1:00 p.m.
18° Monday 1:00 p.m.
Sunny · 2:00 p.m.
19° 2:00 p.m.
Sunny · 3:00 p.m.
19° 3:00 p.m.
Sunny · 4:00 p.m.
19° 4:00 p.m.
Sunny · 5:00 p.m.
19° Monday 5:00 p.m.
Sunny · 6:00 p.m.
18° 6:00 p.m.
Sunny · 7:00 p.m.
17° 7:00 p.m.
Clear night · 8:00 p.m.
17° 8:00 p.m.
Clear night · 9:00 p.m.
17° Monday 9:00 p.m.
Clear night · 10:00 p.m.
17° 10:00 p.m.
Clear night · 11:00 p.m.
16° 11:00 p.m.
Clear night · 12:00 a.m.
16° 12:00 a.m.
Clear night · 1:00 a.m.
15° Tuesday 1:00 a.m.
Clear night · 2:00 a.m.
14° 2:00 a.m.
Clear night · 3:00 a.m.
14° 3:00 a.m.
Mostly clear night · 4:00 a.m.
13° 4:00 a.m.
Mostly clear night · 5:00 a.m.
14° Tuesday 5:00 a.m.
Fog at night · 6:00 a.m.
13° 6:00 a.m.
Fog at night · 7:00 a.m.
13° 7:00 a.m.
Fog · 8:00 a.m.
13° 8:00 a.m.
Mostly sunny · 11:00 a.m.
16° Tuesday 11:00 a.m.
Mostly sunny · 2:00 p.m.
22° 2:00 p.m.
Overcast · 5:00 p.m.
22° 5:00 p.m.
Partly cloudy night · 8:00 p.m.
18° 8:00 p.m.
Mostly cloudy night · 11:00 p.m.
17° Tuesday 11:00 p.m.
Overcast night · 2:00 a.m.
17° 2:00 a.m.
Overcast night · 5:00 a.m.
16° 5:00 a.m.
Light rain · 8:00 a.m.
17° 8:00 a.m.
Light rain · 2:00 p.m.
19° Wednesday 2:00 p.m.
Overcast night · 8:00 p.m.
19° 8:00 p.m.
Mostly cloudy night · 2:00 a.m.
18° 2:00 a.m.
Overcast · 8:00 a.m.
16° 8:00 a.m.
Mostly sunny · 2:00 p.m.
23° Thursday 2:00 p.m.
Partly cloudy night · 8:00 p.m.
20° 8:00 p.m.
Overcast night · 2:00 a.m.
16° 2:00 a.m.
Overcast · 8:00 a.m.
16° 8:00 a.m.
Overcast · 2:00 p.m.
23° Friday 2:00 p.m.
Overcast night · 8:00 p.m.
20° 8:00 p.m.
Light rain · 2:00 a.m.
19° 2:00 a.m.
Light rain · 8:00 a.m.
17° 8:00 a.m.
Light rain · 2:00 p.m.
18° Saturday 2:00 p.m.
Moderate rain · 8:00 p.m.
15° 8:00 p.m.
Light rain · 2:00 a.m.
13° 2:00 a.m.
Moderate rain · 8:00 a.m.
14° 8:00 a.m.
Light rain · 2:00 p.m.
14° Sunday 2:00 p.m.
Mostly clear night · 8:00 p.m.
13° 8:00 p.m.
Clear night · 2:00 a.m.
11° 2:00 a.m.
Mostly sunny · 8:00 a.m.
9° 8:00 a.m.
Mostly sunny · 2:00 p.m.
15° Monday 2:00 p.m.
Mostly clear night · 8:00 p.m.
12° 8:00 p.m.
Partly cloudy night · 2:00 a.m.
9° 2:00 a.m.
Sunny · 8:00 a.m.
7° 8:00 a.m.
Mostly cloudy · 2:00 p.m.
17° Tuesday 2:00 p.m.
Overcast night · 8:00 p.m.
12° 8:00 p.m.
Mostly cloudy night · 2:00 a.m.
10° 2:00 a.m.
Overcast · 8:00 a.m.
12° 8:00 a.m.
Light rain · 2:00 p.m.
18° Wednesday 2:00 p.m.
Moderate rain · 8:00 p.m.
14° 8:00 p.m.
Overcast night · 2:00 a.m.
10° 2:00 a.m.
Overcast · 8:00 a.m.
9° 8:00 a.m.
Overcast · 2:00 p.m.
12° Thursday 2:00 p.m.
Light rain · 8:00 p.m.
10° 8:00 p.m.
Mostly clear night · 2:00 a.m.
9° 2:00 a.m.
Partly cloudy · 8:00 a.m.
8° 8:00 a.m.

AIR QUALITY FORECAST

Air Quality Forecast for Fourth Line

Hourly forecast · Updated every 2 hours
Fair
Nearest forecast value 9:00 p.m.
PM2.5 PM2.5 Good 3,6µg/m³

Air quality is favorable for outdoor activities.

PM10 PM10 Good 4,5µg/m³

Air quality is favorable for outdoor activities.

O₃ O₃ Fair 87,5µg/m³

Air quality is acceptable for most people.

NO₂ NO₂ Good 7,9µg/m³

Air quality is favorable for outdoor activities.

Air quality is acceptable for most people.

HEALTH & EXPOSURE

UV, Sun & Health Outlook in Fourth Line

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.
0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme
Today UV 4,0Moderate 😐Moderate
Tomorrow UV 3,9Moderate 😐Moderate
Tuesday UV 0,1Low 😐Moderate
Hourly UV index tomorrow
7:00 a.m.UV 0,0 8:00 a.m.UV 0,1 9:00 a.m.UV 0,7 10:00 a.m.UV 1,7 11:00 a.m.UV 2,6 12:00 p.m.UV 3,4 1:00 p.m.UV 3,8 2:00 p.m.UV 4,0 3:00 p.m.UV 3,7 4:00 p.m.UV 3,2 5:00 p.m.UV 2,3 6:00 p.m.UV 1,3 7:00 p.m.UV 0,5
Today's weather health advice Open today's recommendations.

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Fourth Line

Vertical axis: km/h · Horizontal axis: hours
Hourly wind speed Chart of sustained wind and maximum gusts in km/h. Today 9:00 p.m. 10:00 p.m. 11:00 p.m. 12:00 a.m. Tomorrow 1:00 a.m. 2:00 a.m. 3:00 a.m. 4:00 a.m. Tomorrow 5:00 a.m. 6:00 a.m. 7:00 a.m. 8:00 a.m. Tomorrow 9:00 a.m. 10:00 a.m. 11:00 a.m. 12:00 p.m. Tomorrow 1:00 p.m. 2:00 p.m. 3:00 p.m. 4:00 p.m. Tomorrow 5:00 p.m. 6:00 p.m. 7:00 p.m. 8:00 p.m. Tomorrow 9:00 p.m. 10:00 p.m. 11:00 p.m. 12:00 a.m. Monday 1:00 a.m. 2:00 a.m. 3:00 a.m. 4:00 a.m. Monday 5:00 a.m. 6:00 a.m. 7:00 a.m. 8:00 a.m. Monday 9:00 a.m. 10:00 a.m. 11:00 a.m. 12:00 p.m. Monday 1:00 p.m. 2:00 p.m. 3:00 p.m. 4:00 p.m. Monday 5:00 p.m. 6:00 p.m. 7:00 p.m. 8:00 p.m. Monday 9:00 p.m. 10:00 p.m. 11:00 p.m. 12:00 a.m. Tuesday 1:00 a.m. 2:00 a.m. 3:00 a.m. 4:00 a.m. Tuesday 5:00 a.m. 6:00 a.m. 7:00 a.m. 8:00 a.m. Tuesday 11:00 a.m. 2:00 p.m. 5:00 p.m. 8:00 p.m. Tuesday 11:00 p.m. 2:00 a.m. 5:00 a.m. 8:00 a.m. Wednesday 2:00 p.m. 8:00 p.m. 2:00 a.m. 8:00 a.m. Thursday 2:00 p.m. 8:00 p.m. 2:00 a.m. 8:00 a.m. Friday 2:00 p.m. 8:00 p.m. 2:00 a.m. 8:00 a.m. Saturday 2:00 p.m. 8:00 p.m. 2:00 a.m. 8:00 a.m. Sunday 2:00 p.m. 8:00 p.m. 2:00 a.m. 8:00 a.m. Monday 2:00 p.m. 8:00 p.m. 2:00 a.m. 8:00 a.m. Tuesday 2:00 p.m. 8:00 p.m. 2:00 a.m. 8:00 a.m. Wednesday 2:00 p.m. 8:00 p.m. 2:00 a.m. 8:00 a.m. Thursday 2:00 p.m. 8:00 p.m. 2:00 a.m. 8:00 a.m.
Sustained wind Max gusts

The technical data used to calculate this forecast for Fourth Line were updated today at 8:04 p.m.. The displayed forecasts cover the period through 28/09/2026 at 6:00 p.m.. Weather and air-quality data provided by WEATHER-INFO.COM. UV-index data derived from ECMWF UVB by WEATHER PORTAL. Weather information is generated automatically and periodically reviewed by our technical team.

NIGHT SKY · FOURTH LINE, ONTARIO

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 6:00 AM–7:00 AM.

91/100Best-hour score
BEST TIME TONIGHT 6:00 AM–7:00 AM Astronomical darkness: 8:54 PM–5:47 AM
☁ Cloud cover 0% Real hourly forecast for the best viewing hour.
☾ Moonlight 99% Full Moon · Moon about 24° above the horizon at the best viewing hour.
☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 56° high at the best hour.
✦ Estimated visible meteors 0–2/hour Local estimate after weather, moonlight and radiant-height adjustments.
Chance ≥1 meteor in 30 min40%
UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.
SEP 20–NOV 20
Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak
ACTIVE NOW
OCT 2–NOV 7
OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak
UPCOMING
OCT 20–DEC 10
Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak
UPCOMING
NOV 6–NOV 30
LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% Moon at peak
UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.