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Current weather in Gravenhurst is clear sky.

Where can I find the hourly weather forecast for Gravenhurst?

This page shows hourly weather forecast for Gravenhurst, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Gravenhurst updated regularly?

Weather data for Gravenhurst is updated regularly with the latest available observations and forecasts.

Now · 3:46 AM

Gravenhurst Weather & Hourly Forecast

Canada · Ontario

8°C

Clear night

Feels like: 4°C

💧 Humidity 84% 🌡 Pressure 1033 hPa 💨 Wind 13 km/h 👁 Visibility 39.2 km ☁ Clouds 0% ☀️ UV index 0.0 · Low 🌅 Sunrise 7:04 AM 🌇 Sunset 7:14 PM

Hourly Forecast for Gravenhurst

Today

4:00 AM

Clear night

8° 💧 None 💨 13 km/h H 84%1033 hPa

7:00 AM

Clear night

7° 💧 None 💨 13 km/h H 81%1034 hPa

10:00 AM

Sunny

13° 💧 None 💨 12 km/h H 64%1035 hPa

1:00 PM

Sunny

18° 💧 None 💨 12 km/h H 49%1034 hPa

4:00 PM

Sunny

19° 💧 None 💨 10 km/h H 44%1033 hPa

7:00 PM

Sunny

14° 💧 None 💨 9 km/h H 65%1033 hPa

10:00 PM

Clear night

11° 💧 None 💨 12 km/h H 75%1034 hPa

Tomorrow

1:00 AM

Clear night

9° 💧 None 💨 12 km/h H 83%1034 hPa

4:00 AM

Clear night

8° 💧 None 💨 11 km/h H 88%1033 hPa

7:00 AM

Clear night

7° 💧 None 💨 10 km/h H 93%1034 hPa

10:00 AM

Sunny

13° 💧 None 💨 8 km/h H 67%1034 hPa

1:00 PM

Sunny

18° 💧 None 💨 5 km/h H 50%1032 hPa

4:00 PM

Sunny

20° 💧 None 💨 4 km/h H 43%1030 hPa

7:00 PM

Sunny

14° 💧 None 💨 9 km/h H 58%1029 hPa

10:00 PM

Clear night

10° 💧 None 💨 11 km/h H 76%1029 hPa

Friday

1:00 AM

Clear night

8° 💧 None 💨 10 km/h H 86%1029 hPa

Today

4:00 AM

Clear night

8° 💧 None 💨 13 km/h H 84%1033 hPa

5:00 AM

Clear night

7° 💧 None 💨 13 km/h H 83%1033 hPa

6:00 AM

Clear night

7° 💧 None 💨 13 km/h H 82%1034 hPa

7:00 AM

Clear night

7° 💧 None 💨 13 km/h H 81%1034 hPa

8:00 AM

Sunny

8° 💧 None 💨 13 km/h H 78%1035 hPa

9:00 AM

Sunny

11° 💧 None 💨 12 km/h H 71%1035 hPa

10:00 AM

Sunny

13° 💧 None 💨 12 km/h H 64%1035 hPa

11:00 AM

Sunny

15° 💧 None 💨 13 km/h H 58%1035 hPa

12:00 PM

Sunny

17° 💧 None 💨 12 km/h H 53%1035 hPa

1:00 PM

Sunny

18° 💧 None 💨 12 km/h H 49%1034 hPa

2:00 PM

Sunny

18° 💧 None 💨 11 km/h H 46%1034 hPa

3:00 PM

Sunny

19° 💧 None 💨 10 km/h H 44%1033 hPa

4:00 PM

Sunny

19° 💧 None 💨 10 km/h H 44%1033 hPa

5:00 PM

Sunny

19° 💧 None 💨 10 km/h H 44%1032 hPa

6:00 PM

Sunny

18° 💧 None 💨 8 km/h H 53%1033 hPa

7:00 PM

Sunny

14° 💧 None 💨 9 km/h H 65%1033 hPa

8:00 PM

Clear night

12° 💧 None 💨 11 km/h H 71%1033 hPa

9:00 PM

Clear night

12° 💧 None 💨 12 km/h H 72%1033 hPa

10:00 PM

Clear night

11° 💧 None 💨 12 km/h H 75%1034 hPa

11:00 PM

Clear night

10° 💧 None 💨 12 km/h H 78%1034 hPa

Tomorrow

12:00 AM

Clear night

10° 💧 None 💨 12 km/h H 80%1034 hPa

1:00 AM

Clear night

9° 💧 None 💨 12 km/h H 83%1034 hPa

2:00 AM

Clear night

8° 💧 None 💨 11 km/h H 85%1033 hPa

3:00 AM

Clear night

8° 💧 None 💨 11 km/h H 86%1033 hPa

4:00 AM

Clear night

8° 💧 None 💨 11 km/h H 88%1033 hPa

5:00 AM

Clear night

7° 💧 None 💨 10 km/h H 91%1034 hPa

6:00 AM

Clear night

7° 💧 None 💨 9 km/h H 92%1034 hPa

7:00 AM

Clear night

7° 💧 None 💨 10 km/h H 93%1034 hPa

8:00 AM

Sunny

8° 💧 None 💨 10 km/h H 88%1034 hPa

9:00 AM

Sunny

11° 💧 None 💨 8 km/h H 78%1034 hPa

10:00 AM

Sunny

13° 💧 None 💨 8 km/h H 67%1034 hPa

11:00 AM

Sunny

16° 💧 None 💨 7 km/h H 59%1033 hPa

12:00 PM

Sunny

17° 💧 None 💨 5 km/h H 54%1033 hPa

1:00 PM

Sunny

18° 💧 None 💨 5 km/h H 50%1032 hPa

2:00 PM

Sunny

19° 💧 None 💨 4 km/h H 46%1031 hPa

3:00 PM

Sunny

19° 💧 None 💨 3 km/h H 45%1030 hPa

4:00 PM

Sunny

20° 💧 None 💨 4 km/h H 43%1030 hPa

5:00 PM

Sunny

19° 💧 None 💨 7 km/h H 43%1029 hPa

6:00 PM

Sunny

18° 💧 None 💨 7 km/h H 50%1029 hPa

7:00 PM

Sunny

14° 💧 None 💨 9 km/h H 58%1029 hPa

8:00 PM

Clear night

12° 💧 None 💨 9 km/h H 64%1029 hPa

9:00 PM

Clear night

11° 💧 None 💨 10 km/h H 71%1029 hPa

10:00 PM

Clear night

10° 💧 None 💨 11 km/h H 76%1029 hPa

11:00 PM

Clear night

10° 💧 None 💨 10 km/h H 78%1029 hPa

Friday

12:00 AM

Clear night

9° 💧 None 💨 10 km/h H 83%1029 hPa

1:00 AM

Clear night

8° 💧 None 💨 10 km/h H 86%1029 hPa

2:00 AM

Clear night

8° 💧 None 💨 9 km/h H 88%1028 hPa

3:00 AM

Clear night

8° 💧 None 💨 6 km/h H 88%1028 hPa

4:00 AM

Clear night

8° 💧 None 💨 4 km/h H 89%1028 hPa

5:00 AM

Clear night

7° 💧 None 💨 5 km/h H 92%1028 hPa

6:00 AM

Clear night

7° 💧 None 💨 5 km/h H 93%1028 hPa

7:00 AM

Clear night

7° 💧 None 💨 6 km/h H 92%1028 hPa

8:00 AM

Sunny

8° 💧 None 💨 8 km/h H 92%1029 hPa

9:00 AM

Sunny

12° 💧 None 💨 7 km/h H 82%1029 hPa

10:00 AM

Sunny

15° 💧 None 💨 5 km/h H 69%1029 hPa

11:00 AM

Sunny

18° 💧 None 💨 8 km/h H 52%1028 hPa

12:00 PM

Sunny

19° 💧 None 💨 7 km/h H 48%1028 hPa

1:00 PM

Sunny

20° 💧 None 💨 7 km/h H 46%1027 hPa

2:00 PM

Sunny

21° 💧 None 💨 8 km/h H 45%1027 hPa

3:00 PM

Sunny

21° 💧 None 💨 9 km/h H 44%1026 hPa

4:00 PM

Sunny

21° 💧 None 💨 8 km/h H 45%1025 hPa

5:00 PM

Sunny

21° 💧 None 💨 8 km/h H 46%1025 hPa

6:00 PM

Sunny

19° 💧 None 💨 7 km/h H 56%1025 hPa

7:00 PM

Sunny

16° 💧 None 💨 8 km/h H 71%1025 hPa

8:00 PM

Clear night

14° 💧 None 💨 6 km/h H 79%1025 hPa

11:00 PM

Clear night

11° 💧 None 💨 6 km/h H 87%1026 hPa

Saturday

2:00 AM

Clear night

9° 💧 None 💨 7 km/h H 91%1026 hPa

5:00 AM

Clear night

9° 💧 None 💨 7 km/h H 91%1025 hPa

8:00 AM

Sunny

9° 💧 None 💨 7 km/h H 88%1026 hPa

11:00 AM

Sunny

19° 💧 None 💨 5 km/h H 54%1026 hPa

2:00 PM

Sunny

21° 💧 None 💨 7 km/h H 39%1024 hPa

5:00 PM

Sunny

21° 💧 None 💨 9 km/h H 42%1022 hPa

8:00 PM

Clear night

14° 💧 None 💨 8 km/h H 73%1022 hPa

11:00 PM

Partly cloudy night

12° 💧 None 💨 11 km/h H 77%1023 hPa

Sunday

2:00 AM

Overcast night

10° 💧 None 💨 8 km/h H 84%1022 hPa

5:00 AM

Mostly cloudy night

9° 💧 None 💨 8 km/h H 89%1021 hPa

8:00 AM

Mostly sunny

10° 💧 None 💨 9 km/h H 88%1021 hPa

11:00 AM

Overcast

19° 💧 None 💨 7 km/h H 56%1020 hPa

2:00 PM

Overcast

21° 💧 None 💨 11 km/h H 42%1018 hPa

5:00 PM

Partly cloudy

21° 💧 None 💨 10 km/h H 44%1017 hPa

8:00 PM

Clear night

14° 💧 None 💨 8 km/h H 70%1017 hPa

11:00 PM

Clear night

12° 💧 None 💨 7 km/h H 82%1016 hPa

Monday

2:00 AM

Clear night

10° 💧 None 💨 7 km/h H 88%1016 hPa

5:00 AM

Clear night

9° 💧 None 💨 5 km/h H 90%1016 hPa

8:00 AM

Sunny

9° 💧 None 💨 5 km/h H 92%1016 hPa

11:00 AM

Sunny

19° 💧 None 💨 4 km/h H 56%1015 hPa

2:00 PM

Sunny

22° 💧 None 💨 8 km/h H 43%1013 hPa

5:00 PM

Sunny

21° 💧 None 💨 12 km/h H 48%1013 hPa

8:00 PM

Clear night

15° 💧 None 💨 11 km/h H 79%1014 hPa

Tuesday

2:00 AM

Clear night

11° 💧 None 💨 5 km/h H 91%1014 hPa

8:00 AM

Partly cloudy

11° 💧 None 💨 1 km/h H 99%1016 hPa

2:00 PM

Mostly cloudy

21° 💧 None 💨 7 km/h H 56%1015 hPa

8:00 PM

Clear night

14° 💧 None 💨 3 km/h H 73%1014 hPa

Wednesday

2:00 AM

Mostly clear night

14° 💧 None 💨 12 km/h H 96%1013 hPa

8:00 AM

Mostly cloudy

14° 💧 None 💨 15 km/h H 97%1011 hPa

2:00 PM

Partly cloudy

23° 💧 None 💨 20 km/h H 57%1007 hPa

8:00 PM

Overcast night

22° 💧 None 💨 19 km/h H 73%1006 hPa

Thursday

2:00 AM

Light rain

18° 💧 None 💨 15 km/h H 98%1008 hPa

8:00 AM

Light rain

18° 💧 None 💨 14 km/h H 99%1006 hPa

2:00 PM

Moderate rain

18° 💧 None 💨 23 km/h H 96%1002 hPa

8:00 PM

Overcast night

18° 💧 None 💨 23 km/h H 97%1000 hPa

Friday

2:00 AM

Mostly cloudy night

15° 💧 None 💨 15 km/h H 93%1002 hPa

8:00 AM

Partly cloudy

12° 💧 None 💨 17 km/h H 77%1006 hPa

2:00 PM

Overcast

13° 💧 None 💨 20 km/h H 59%1009 hPa

8:00 PM

Partly cloudy night

10° 💧 None 💨 13 km/h H 75%1011 hPa

Saturday

2:00 AM

Light rain

8° 💧 None 💨 14 km/h H 92%1013 hPa

8:00 AM

Partly cloudy

7° 💧 None 💨 14 km/h H 82%1016 hPa

2:00 PM

Mostly cloudy

12° 💧 None 💨 25 km/h H 50%1019 hPa

8:00 PM

Partly cloudy night

9° 💧 None 💨 10 km/h H 69%1021 hPa

Sunday

2:00 AM

Overcast night

7° 💧 None 💨 2 km/h H 88%1023 hPa

8:00 AM

Mostly cloudy

8° 💧 None 💨 6 km/h H 92%1024 hPa

2:00 PM

Overcast

11° 💧 None 💨 11 km/h H 72%1023 hPa

8:00 PM

Mostly clear night

9° 💧 None 💨 3 km/h H 84%1023 hPa

Monday

2:00 AM

Mostly cloudy night

9° 💧 None 💨 8 km/h H 83%1021 hPa

8:00 AM

Mostly cloudy

9° 💧 None 💨 7 km/h H 92%1021 hPa

2:00 PM

Overcast

16° 💧 None 💨 10 km/h H 67%1019 hPa

8:00 PM

Light rain

13° 💧 None 💨 13 km/h H 87%1017 hPa

Tuesday

2:00 AM

Mostly cloudy night

13° 💧 None 💨 14 km/h H 80%1015 hPa

8:00 AM

Mostly cloudy

13° 💧 None 💨 15 km/h H 88%1011 hPa

2:00 PM

Moderate rain

16° 💧 None 💨 17 km/h H 97%1005 hPa

8:00 PM

Clear night

11° 💧 None 💨 16 km/h H 81%1005 hPa

Wednesday

2:00 AM

Mostly clear night

11° 💧 None 💨 23 km/h H 67%1005 hPa

8:00 AM

Partly cloudy

9° 💧 None 💨 16 km/h H 84%1006 hPa

2:00 PM

Mostly sunny

11° 💧 None 💨 20 km/h H 51%1007 hPa

8:00 PM

Mostly cloudy night

8° 💧 None 💨 11 km/h H 61%1009 hPa

In Gravenhurst and, more broadly, across the province of Ontario: This morning across the region, mainly cloudy skies are expected to persist, with temperatures ranging from about 8 to 17 degrees Celsius. In many areas, conditions are expected to remain dry through the early hours. During the afternoon, skies will likely stay mostly cloudy, with temperatures remaining steady within the same range. Winds will predominantly come from the northeast at around 14 km/h, with gusts reaching up to 32 km/h at times. Overall, little to no precipitation is anticipated today, but the breeze from the northeast may cause some minor disturbances locally. No significant weather hazards are expected in the coming hours.

15-Day Weather Outlook for Gravenhurst

TomorrowTomorrow

Sunny 19°/7° 💧 None 💨 12 km/h

Friday, Sep 25Fri Sep 25

Mostly cloudy 20°/6° 💧 None 💨 10 km/h

Saturday, Sep 26Sat Sep 26

Overcast 22°/8° 💧 None 💨 9 km/h

Sunday, Sep 27Sun Sep 27

Overcast 21°/10° 💧 None 💨 13 km/h

Monday, Sep 28Mon Sep 28

Partly cloudy 21°/8° 💧 None 💨 9 km/h

Tuesday, Sep 29Tue Sep 29

Overcast 22°/8° 💧 None 💨 11 km/h

Wednesday, Sep 30Wed Sep 30

Mostly cloudy 22°/13° 💧 None 💨 13 km/h

Thursday, Oct 1Thu Oct 1

Moderate rain 20°/16° 💧 5.2 mm 💨 11 km/h

Friday, Oct 2Fri Oct 2

Overcast 22°/17° 💧 0.5 mm 💨 19 km/h

Saturday, Oct 3Sat Oct 3

Light rain 23°/17° 💧 3.4 mm 💨 18 km/h

Sunday, Oct 4Sun Oct 4

Moderate rain 20°/15° 💧 6.1 mm 💨 15 km/h

Monday, Oct 5Mon Oct 5

Light rain 15°/11° 💧 3.7 mm 💨 14 km/h

Tuesday, Oct 6Tue Oct 6

Light rain 16°/9° 💧 6.7 mm 💨 12 km/h

Wednesday, Oct 7Wed Oct 7

Mostly sunny 13°/11° 💧 0.8 mm 💨 14 km/h

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Gravenhurst

Vertical axis: °C · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Gravenhurst

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 4:00 AM

PM2.5 Fine particles Good 2,2µg/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 3,4µg/m³

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

O₃ Ozone Good 53,1µg/m³

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

NO₂ Nitrogen dioxide Good 7,0µg/m³

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

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Gravenhurst

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 4,8Moderate 😊Good

Tomorrow UV 4,7Moderate 🙂Fair

Friday UV 4,3Moderate 😐Moderate

Saturday UV 4,5Moderate 🙂Fair

Sunday UV 6,0High 😊Good

Monday UV 6,0High —Unavailable

Tuesday UV 5,0Moderate —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,1 9:00 AMUV 0,7 10:00 AMUV 1,7 11:00 AMUV 2,9 12:00 PMUV 4,1 1:00 PMUV 4,8 2:00 PMUV 4,6 3:00 PMUV 3,7 4:00 PMUV 2,4 5:00 PMUV 1,2 6:00 PMUV 0,4

Today's weather health advice Open today's recommendations.

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

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 Gravenhurst

Vertical axis: km/h · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · GRAVENHURST, ONTARIO

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 5:00 AM–6:00 AM.

100/100Best-hour score

BEST TIME TONIGHT 5:00 AM–6:00 AM Astronomical darkness: 8:53 PM–5:27 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 89% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 60° high at the best hour.

✦ Estimated visible meteors 1–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min72%

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.

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Forecast data for Gravenhurst were last refreshed today at 3:46 AM. The current forecast period extends through 25/09/2026 at 1:00 AM. 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.