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Current weather in Greater Sudbury / Grand Sudbury is clear sky.

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This page shows hourly weather forecast for Greater Sudbury / Grand Sudbury, including temperature, wind, precipitation, humidity and cloud cover.

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Weather data for Greater Sudbury / Grand Sudbury is updated regularly with the latest available observations and forecasts.

Now · 9:25 PM

Greater Sudbury / Grand Sudbury Weather & Hourly Forecast

Canada · Ontario

15°C

Clear night

Feels like: 14°C

💧 Humidity 87% 🌡 Pressure 1014 hPa 💨 Wind 12 km/h 👁 Visibility 41.6 km ☁ Clouds 10% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Greater Sudbury / Grand Sudbury

Today

10:00 PM

Clear night

14° 💧 None 💨 12 km/h H 92%1014 hPa

Tomorrow

1:00 AM

Mostly clear night

14° 💧 None 💨 12 km/h H 93%1014 hPa

4:00 AM

Mostly cloudy night

14° 💧 None 💨 11 km/h H 93%1013 hPa

7:00 AM

Mostly cloudy

14° 💧 None 💨 14 km/h H 94%1012 hPa

10:00 AM

Partly cloudy

19° 💧 0.2 mm 💨 19 km/h H 82%1010 hPa

1:00 PM

Light rain

22° 💧 0.6 mm 💨 26 km/h H 65%1009 hPa

4:00 PM

Mostly cloudy

22° 💧 0.0 mm 💨 25 km/h H 71%1007 hPa

7:00 PM

Mostly cloudy

20° 💧 0.4 mm 💨 18 km/h H 81%1007 hPa

10:00 PM

Mostly cloudy night

18° 💧 None 💨 11 km/h H 95%1008 hPa

Sunday

1:00 AM

Clear night

14° 💧 None 💨 12 km/h H 92%1010 hPa

4:00 AM

Mostly clear night

12° 💧 None 💨 10 km/h H 95%1010 hPa

7:00 AM

Overcast

11° 💧 None 💨 10 km/h H 97%1011 hPa

10:00 AM

Overcast

15° 💧 0.1 mm 💨 11 km/h H 84%1012 hPa

1:00 PM

Light rain

18° 💧 0.3 mm 💨 16 km/h H 61%1010 hPa

4:00 PM

Partly cloudy

19° 💧 4.5 mm 💨 15 km/h H 57%1009 hPa

7:00 PM

Mostly cloudy

13° 💧 0.2 mm 💨 11 km/h H 92%1011 hPa

Today

10:00 PM

Clear night

14° 💧 None 💨 12 km/h H 92%1014 hPa

11:00 PM

Clear night

14° 💧 None 💨 12 km/h H 93%1014 hPa

Tomorrow

12:00 AM

Mostly clear night

14° 💧 None 💨 12 km/h H 93%1014 hPa

1:00 AM

Mostly clear night

14° 💧 None 💨 12 km/h H 93%1014 hPa

2:00 AM

Partly cloudy night

14° 💧 None 💨 11 km/h H 93%1014 hPa

3:00 AM

Overcast night

14° 💧 None 💨 12 km/h H 94%1014 hPa

4:00 AM

Mostly cloudy night

14° 💧 None 💨 11 km/h H 93%1013 hPa

5:00 AM

Partly cloudy night

14° 💧 None 💨 10 km/h H 94%1013 hPa

6:00 AM

Partly cloudy night

13° 💧 None 💨 13 km/h H 93%1012 hPa

7:00 AM

Mostly cloudy

14° 💧 None 💨 14 km/h H 94%1012 hPa

8:00 AM

Mostly cloudy

15° 💧 None 💨 14 km/h H 94%1012 hPa

9:00 AM

Overcast

17° 💧 None 💨 18 km/h H 90%1011 hPa

10:00 AM

Partly cloudy

19° 💧 0.0 mm 💨 19 km/h H 82%1010 hPa

11:00 AM

Mostly cloudy

21° 💧 0.0 mm 💨 25 km/h H 70%1010 hPa

12:00 PM

Light rain

22° 💧 0.1 mm 💨 25 km/h H 66%1009 hPa

1:00 PM

Light rain

22° 💧 0.2 mm 💨 26 km/h H 65%1009 hPa

2:00 PM

Light rain

23° 💧 0.3 mm 💨 27 km/h H 65%1008 hPa

3:00 PM

Overcast

23° 💧 0.1 mm 💨 25 km/h H 68%1008 hPa

4:00 PM

Mostly cloudy

22° 💧 0.0 mm 💨 25 km/h H 71%1007 hPa

5:00 PM

Mostly cloudy

22° 💧 None 💨 23 km/h H 72%1007 hPa

6:00 PM

Mostly sunny

22° 💧 None 💨 20 km/h H 75%1007 hPa

7:00 PM

Mostly cloudy

20° 💧 0.0 mm 💨 18 km/h H 81%1007 hPa

8:00 PM

Light rain

19° 💧 0.3 mm 💨 16 km/h H 89%1007 hPa

9:00 PM

Mostly cloudy night

19° 💧 0.0 mm 💨 14 km/h H 92%1008 hPa

10:00 PM

Mostly cloudy night

18° 💧 None 💨 11 km/h H 95%1008 hPa

11:00 PM

Clear night

17° 💧 None 💨 11 km/h H 97%1009 hPa

Sunday

12:00 AM

Clear night

16° 💧 None 💨 12 km/h H 94%1009 hPa

1:00 AM

Clear night

14° 💧 None 💨 12 km/h H 92%1010 hPa

2:00 AM

Mostly clear night

13° 💧 None 💨 12 km/h H 94%1010 hPa

3:00 AM

Clear night

12° 💧 None 💨 11 km/h H 95%1010 hPa

4:00 AM

Mostly clear night

12° 💧 None 💨 10 km/h H 95%1010 hPa

5:00 AM

Mostly cloudy night

11° 💧 None 💨 9 km/h H 95%1011 hPa

6:00 AM

Mostly cloudy night

11° 💧 None 💨 10 km/h H 96%1011 hPa

7:00 AM

Overcast

11° 💧 None 💨 10 km/h H 97%1011 hPa

8:00 AM

Overcast

12° 💧 None 💨 11 km/h H 96%1012 hPa

9:00 AM

Overcast

13° 💧 None 💨 10 km/h H 92%1012 hPa

10:00 AM

Overcast

15° 💧 None 💨 11 km/h H 84%1012 hPa

11:00 AM

Mostly cloudy

17° 💧 None 💨 14 km/h H 69%1011 hPa

12:00 PM

Overcast

18° 💧 0.1 mm 💨 14 km/h H 62%1011 hPa

1:00 PM

Light rain

18° 💧 0.2 mm 💨 16 km/h H 61%1010 hPa

2:00 PM

Overcast

19° 💧 0.1 mm 💨 16 km/h H 59%1010 hPa

3:00 PM

Overcast

19° 💧 0.1 mm 💨 16 km/h H 59%1010 hPa

4:00 PM

Partly cloudy

19° 💧 0.0 mm 💨 15 km/h H 57%1009 hPa

5:00 PM

Mostly cloudy

19° 💧 0.0 mm 💨 16 km/h H 57%1009 hPa

6:00 PM

Thunderstorms

13° 💧 4.4 mm 💨 12 km/h H 95%1011 hPa

7:00 PM

Mostly cloudy

13° 💧 0.1 mm 💨 11 km/h H 92%1011 hPa

8:00 PM

Overcast night

13° 💧 0.1 mm 💨 7 km/h H 94%1012 hPa

9:00 PM

Overcast night

12° 💧 0.1 mm 💨 6 km/h H 94%1013 hPa

10:00 PM

Overcast night

12° 💧 0.0 mm 💨 8 km/h H 95%1014 hPa

11:00 PM

Clear night

12° 💧 None 💨 10 km/h H 94%1015 hPa

Monday

12:00 AM

Clear night

11° 💧 None 💨 11 km/h H 93%1016 hPa

1:00 AM

Clear night

10° 💧 None 💨 9 km/h H 91%1016 hPa

2:00 AM

Clear night

9° 💧 None 💨 8 km/h H 92%1017 hPa

3:00 AM

Clear night

9° 💧 None 💨 8 km/h H 94%1018 hPa

4:00 AM

Clear night

8° 💧 None 💨 8 km/h H 94%1019 hPa

5:00 AM

Clear night

8° 💧 None 💨 8 km/h H 94%1019 hPa

6:00 AM

Clear night

8° 💧 None 💨 9 km/h H 94%1020 hPa

7:00 AM

Sunny

8° 💧 None 💨 9 km/h H 94%1021 hPa

8:00 AM

Sunny

9° 💧 None 💨 11 km/h H 92%1022 hPa

5:00 PM

Mostly cloudy

17° 💧 None 💨 9 km/h H 45%1022 hPa

8:00 PM

Mostly clear night

14° 💧 None 💨 7 km/h H 74%1022 hPa

11:00 PM

Overcast night

12° 💧 None 💨 8 km/h H 83%1022 hPa

Tuesday

2:00 AM

Overcast night

12° 💧 None 💨 11 km/h H 87%1022 hPa

5:00 AM

Light rain

13° 💧 None 💨 13 km/h H 81%1021 hPa

8:00 AM

Moderate rain

14° 💧 None 💨 23 km/h H 86%1019 hPa

11:00 AM

Moderate rain

16° 💧 None 💨 30 km/h H 89%1018 hPa

2:00 PM

Light rain

17° 💧 None 💨 25 km/h H 88%1016 hPa

5:00 PM

Overcast

18° 💧 None 💨 23 km/h H 90%1015 hPa

8:00 PM

Mostly cloudy night

18° 💧 None 💨 17 km/h H 91%1016 hPa

11:00 PM

Overcast night

17° 💧 None 💨 13 km/h H 96%1018 hPa

Wednesday

2:00 AM

Overcast night

14° 💧 None 💨 9 km/h H 89%1021 hPa

5:00 AM

Clear night

11° 💧 None 💨 8 km/h H 92%1023 hPa

8:00 AM

Sunny

11° 💧 None 💨 9 km/h H 94%1026 hPa

11:00 AM

Mostly sunny

16° 💧 None 💨 9 km/h H 65%1027 hPa

2:00 PM

Mostly cloudy

19° 💧 None 💨 2 km/h H 55%1027 hPa

5:00 PM

Overcast

20° 💧 None 💨 2 km/h H 51%1026 hPa

8:00 PM

Overcast night

16° 💧 None 💨 3 km/h H 69%1026 hPa

11:00 PM

Partly cloudy night

13° 💧 None 💨 3 km/h H 87%1026 hPa

Thursday

2:00 AM

Mostly cloudy night

12° 💧 None 💨 5 km/h H 89%1026 hPa

5:00 AM

Mostly cloudy night

13° 💧 None 💨 2 km/h H 87%1026 hPa

8:00 AM

Sunny

12° 💧 None 💨 6 km/h H 85%1027 hPa

11:00 AM

Sunny

18° 💧 None 💨 3 km/h H 60%1027 hPa

2:00 PM

Sunny

21° 💧 None 💨 1 km/h H 48%1026 hPa

8:00 PM

Clear night

20° 💧 None 💨 11 km/h H 48%1026 hPa

Friday

2:00 AM

Clear night

16° 💧 None 💨 8 km/h H 67%1025 hPa

8:00 AM

Sunny

11° 💧 None 💨 6 km/h H 84%1027 hPa

2:00 PM

Sunny

11° 💧 None 💨 5 km/h H 89%1027 hPa

8:00 PM

Clear night

21° 💧 None 💨 14 km/h H 50%1024 hPa

Saturday

2:00 AM

Clear night

16° 💧 None 💨 11 km/h H 76%1021 hPa

8:00 AM

Mostly sunny

14° 💧 None 💨 9 km/h H 94%1019 hPa

2:00 PM

Mostly cloudy

14° 💧 None 💨 8 km/h H 93%1017 hPa

8:00 PM

Mostly cloudy night

21° 💧 None 💨 18 km/h H 61%1013 hPa

Sunday

2:00 AM

Mostly clear night

16° 💧 None 💨 9 km/h H 86%1012 hPa

8:00 AM

Mostly sunny

14° 💧 None 💨 6 km/h H 96%1012 hPa

2:00 PM

Mostly sunny

12° 💧 None 💨 16 km/h H 86%1016 hPa

8:00 PM

Mostly cloudy night

17° 💧 None 💨 13 km/h H 54%1016 hPa

Monday

2:00 AM

Overcast night

14° 💧 None 💨 7 km/h H 71%1017 hPa

8:00 AM

Overcast

11° 💧 None 💨 13 km/h H 80%1020 hPa

2:00 PM

Overcast

9° 💧 None 💨 17 km/h H 80%1022 hPa

8:00 PM

Overcast night

13° 💧 None 💨 19 km/h H 56%1021 hPa

Tuesday

2:00 AM

Overcast night

11° 💧 None 💨 19 km/h H 66%1020 hPa

8:00 AM

Overcast

10° 💧 None 💨 23 km/h H 65%1020 hPa

2:00 PM

Heavy rain

8° 💧 None 💨 24 km/h H 89%1020 hPa

8:00 PM

Light rain

10° 💧 None 💨 35 km/h H 82%1018 hPa

Wednesday

2:00 AM

Light rain

9° 💧 None 💨 27 km/h H 89%1017 hPa

8:00 AM

Light rain

8° 💧 None 💨 21 km/h H 95%1015 hPa

2:00 PM

Overcast

9° 💧 None 💨 12 km/h H 96%1014 hPa

8:00 PM

Light rain

15° 💧 None 💨 5 km/h H 83%1013 hPa

Thursday

2:00 AM

Mostly clear night

13° 💧 None 💨 5 km/h H 92%1014 hPa

8:00 AM

Partly cloudy

11° 💧 None 💨 6 km/h H 99%1015 hPa

2:00 PM

Overcast

11° 💧 None 💨 8 km/h H 95%1016 hPa

8:00 PM

Overcast night

15° 💧 None 💨 7 km/h H 67%1016 hPa

Friday

2:00 AM

Overcast night

12° 💧 None 💨 12 km/h H 88%1017 hPa

8:00 AM

Light rain

11° 💧 None 💨 16 km/h H 90%1017 hPa

2:00 PM

Mostly cloudy

11° 💧 None 💨 19 km/h H 89%1019 hPa

8:00 PM

Overcast night

14° 💧 None 💨 16 km/h H 73%1020 hPa

Saturday

2:00 AM

Overcast night

13° 💧 None 💨 11 km/h H 77%1022 hPa

8:00 AM

Overcast

11° 💧 None 💨 8 km/h H 87%1023 hPa

2:00 PM

Sunny

9° 💧 None 💨 10 km/h H 88%1025 hPa

In Greater Sudbury / Grand Sudbury and, more broadly, across the province of Ontario: The evening will see mainly clear skies across the region, with temperatures gradually falling to between 16 and 21 degrees Celsius. In many areas, conditions remain dry, and no significant precipitation is expected overnight. Winds are generally light from the east, with speeds reaching up to 12 km/h and gusts possibly hitting around 21 km/h. These gentle breezes are unlikely to cause any hazards, but they may bring a slight cooling effect as the night progresses. Overall, tonight is expected to be calm and mild, with comfortable conditions persisting into the early hours.

15-Day Weather Outlook for Greater Sudbury / Grand Sudbury

Sunday, Sep 13Sun Sep 13

Thunderstorms 19°/11° 💧 None 💨 16 km/h

Monday, Sep 14Mon Sep 14

Overcast 17°/8° 💧 6.4 mm 💨 11 km/h

Tuesday, Sep 15Tue Sep 15

Moderate rain 18°/12° 💧 6.9 mm 💨 30 km/h

Wednesday, Sep 16Wed Sep 16

Overcast 20°/11° 💧 0.1 mm 💨 17 km/h

Thursday, Sep 17Thu Sep 17

Overcast 21°/12° 💧 None 💨 6 km/h

Friday, Sep 18Fri Sep 18

Sunny 20°/11° 💧 2.0 mm 💨 11 km/h

Saturday, Sep 19Sat Sep 19

Mostly sunny 21°/14° 💧 None 💨 14 km/h

Sunday, Sep 20Sun Sep 20

Mostly cloudy 21°/12° 💧 0.0 mm 💨 18 km/h

Monday, Sep 21Mon Sep 21

Mostly cloudy 17°/9° 💧 None 💨 17 km/h

Tuesday, Sep 22Tue Sep 22

Heavy rain 13°/8° 💧 10 mm 💨 24 km/h

Wednesday, Sep 23Wed Sep 23

Light rain 10°/8° 💧 16 mm 💨 35 km/h

Thursday, Sep 24Thu Sep 24

Light rain 15°/11° 💧 0.9 mm 💨 8 km/h

Friday, Sep 25Fri Sep 25

Light rain 15°/11° 💧 1.9 mm 💨 19 km/h

Saturday, Sep 26Sat Sep 26

Overcast 14°/9° 💧 0.1 mm 💨 16 km/h

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Greater Sudbury / Grand Sudbury

Vertical axis: °C · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Greater Sudbury / Grand Sudbury

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 10:00 PM

PM2.5 Fine particles Good 1,2µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 1,3µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 88,9µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 1,2µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Greater Sudbury / Grand Sudbury

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 5,4Moderate 🙂Fair

Tomorrow UV 4,7Moderate 😐Moderate

Sunday UV 4,3Moderate 🙂Fair

Monday UV 5,0Moderate 🙂Fair

Tuesday UV 4,0Moderate 🙂Fair

Wednesday UV 4,0Moderate —Unavailable

Thursday UV 4,0Moderate —Unavailable

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 Greater Sudbury / Grand Sudbury

Vertical axis: km/h · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · GREATER SUDBURY / GRAND SUDBURY, ONTARIO

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 11:00 PM–12:00 AM.

95/100Best-hour score

BEST TIME TONIGHT 11:00 PM–12:00 AM Astronomical darkness: 9:29 PM–5:13 AM

☁ Cloud cover 2% Real hourly forecast for the best viewing hour.

☾ Moonlight 0% New Moon · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 26° 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 min50%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

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

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.

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Forecast data for Greater Sudbury / Grand Sudbury were last refreshed today at 9:25 PM. The current forecast period extends through 13/09/2026 at 7:00 PM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.