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Current weather in Ottawa is clear sky.

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

Now · 12:48 PM

Ottawa Weather & Hourly Forecast

Canada · Ontario

17°C

Sunny

Feels like: 14°C

💧 Humidity 58% 🌡 Pressure 1036 hPa 💨 Wind 11 km/h 👁 Visibility 52.3 km ☁ Clouds 0% ☀️ UV index 4.2 · Moderate 🌅 Sunrise 6:50 AM 🌇 Sunset 7:00 PM

Hourly Forecast for Ottawa

Today

1:00 PM

Sunny

17° 💧 None 💨 11 km/h H 58%1036 hPa

4:00 PM

Sunny

18° 💧 None 💨 14 km/h H 47%1034 hPa

7:00 PM

Sunny

13° 💧 None 💨 9 km/h H 68%1034 hPa

10:00 PM

Clear night

10° 💧 None 💨 9 km/h H 76%1035 hPa

Tomorrow

1:00 AM

Clear night

8° 💧 None 💨 7 km/h H 83%1035 hPa

4:00 AM

Clear night

6° 💧 None 💨 7 km/h H 89%1034 hPa

7:00 AM

Sunny

6° 💧 None 💨 6 km/h H 92%1034 hPa

10:00 AM

Sunny

13° 💧 None 💨 7 km/h H 71%1034 hPa

1:00 PM

Sunny

18° 💧 None 💨 8 km/h H 53%1032 hPa

4:00 PM

Sunny

19° 💧 None 💨 9 km/h H 51%1030 hPa

7:00 PM

Clear night

15° 💧 None 💨 4 km/h H 73%1029 hPa

10:00 PM

Clear night

12° 💧 None 💨 6 km/h H 83%1029 hPa

Friday

1:00 AM

Clear night

11° 💧 None 💨 7 km/h H 87%1028 hPa

4:00 AM

Clear night

9° 💧 None 💨 6 km/h H 93%1027 hPa

7:00 AM

Fog

8° 💧 None 💨 6 km/h H 97%1028 hPa

10:00 AM

Sunny

15° 💧 None 💨 5 km/h H 82%1028 hPa

Today

1:00 PM

Sunny

17° 💧 None 💨 11 km/h H 58%1036 hPa

2:00 PM

Sunny

18° 💧 None 💨 14 km/h H 49%1035 hPa

3:00 PM

Sunny

18° 💧 None 💨 14 km/h H 47%1035 hPa

4:00 PM

Sunny

18° 💧 None 💨 14 km/h H 47%1034 hPa

5:00 PM

Sunny

17° 💧 None 💨 13 km/h H 52%1034 hPa

6:00 PM

Sunny

16° 💧 None 💨 10 km/h H 60%1034 hPa

7:00 PM

Sunny

13° 💧 None 💨 9 km/h H 68%1034 hPa

8:00 PM

Clear night

12° 💧 None 💨 10 km/h H 69%1035 hPa

9:00 PM

Clear night

11° 💧 None 💨 9 km/h H 72%1035 hPa

10:00 PM

Clear night

10° 💧 None 💨 9 km/h H 76%1035 hPa

11:00 PM

Clear night

9° 💧 None 💨 8 km/h H 78%1035 hPa

Tomorrow

12:00 AM

Clear night

9° 💧 None 💨 8 km/h H 81%1035 hPa

1:00 AM

Clear night

8° 💧 None 💨 7 km/h H 83%1035 hPa

2:00 AM

Clear night

7° 💧 None 💨 7 km/h H 86%1034 hPa

3:00 AM

Clear night

7° 💧 None 💨 7 km/h H 88%1034 hPa

4:00 AM

Clear night

6° 💧 None 💨 7 km/h H 89%1034 hPa

5:00 AM

Clear night

6° 💧 None 💨 6 km/h H 90%1034 hPa

6:00 AM

Clear night

6° 💧 None 💨 6 km/h H 91%1034 hPa

7:00 AM

Sunny

6° 💧 None 💨 6 km/h H 92%1034 hPa

8:00 AM

Sunny

8° 💧 None 💨 7 km/h H 89%1035 hPa

9:00 AM

Sunny

11° 💧 None 💨 6 km/h H 82%1035 hPa

10:00 AM

Sunny

13° 💧 None 💨 7 km/h H 71%1034 hPa

11:00 AM

Sunny

15° 💧 None 💨 7 km/h H 62%1034 hPa

12:00 PM

Sunny

17° 💧 None 💨 7 km/h H 55%1033 hPa

1:00 PM

Sunny

18° 💧 None 💨 8 km/h H 53%1032 hPa

2:00 PM

Sunny

18° 💧 None 💨 8 km/h H 51%1031 hPa

3:00 PM

Sunny

19° 💧 None 💨 9 km/h H 51%1031 hPa

4:00 PM

Sunny

19° 💧 None 💨 9 km/h H 51%1030 hPa

5:00 PM

Sunny

19° 💧 None 💨 9 km/h H 54%1029 hPa

6:00 PM

Sunny

17° 💧 None 💨 4 km/h H 71%1029 hPa

7:00 PM

Clear night

15° 💧 None 💨 4 km/h H 73%1029 hPa

8:00 PM

Clear night

13° 💧 None 💨 3 km/h H 76%1029 hPa

9:00 PM

Clear night

12° 💧 None 💨 5 km/h H 82%1029 hPa

10:00 PM

Clear night

12° 💧 None 💨 6 km/h H 83%1029 hPa

11:00 PM

Clear night

11° 💧 None 💨 7 km/h H 84%1028 hPa

Friday

12:00 AM

Clear night

11° 💧 None 💨 8 km/h H 85%1028 hPa

1:00 AM

Clear night

11° 💧 None 💨 7 km/h H 87%1028 hPa

2:00 AM

Clear night

10° 💧 None 💨 7 km/h H 89%1027 hPa

3:00 AM

Clear night

9° 💧 None 💨 7 km/h H 91%1027 hPa

4:00 AM

Clear night

9° 💧 None 💨 6 km/h H 93%1027 hPa

5:00 AM

Clear night

9° 💧 None 💨 6 km/h H 94%1027 hPa

6:00 AM

Mostly clear night

8° 💧 None 💨 6 km/h H 96%1027 hPa

7:00 AM

Fog

8° 💧 None 💨 6 km/h H 97%1028 hPa

8:00 AM

Fog

10° 💧 None 💨 8 km/h H 95%1028 hPa

9:00 AM

Fog

12° 💧 None 💨 6 km/h H 91%1028 hPa

10:00 AM

Sunny

15° 💧 None 💨 5 km/h H 82%1028 hPa

11:00 AM

Sunny

17° 💧 None 💨 6 km/h H 70%1028 hPa

12:00 PM

Sunny

19° 💧 None 💨 6 km/h H 64%1027 hPa

1:00 PM

Sunny

20° 💧 None 💨 7 km/h H 58%1027 hPa

2:00 PM

Sunny

21° 💧 None 💨 8 km/h H 55%1026 hPa

3:00 PM

Sunny

21° 💧 None 💨 8 km/h H 50%1025 hPa

4:00 PM

Sunny

21° 💧 None 💨 8 km/h H 48%1025 hPa

5:00 PM

Sunny

21° 💧 None 💨 6 km/h H 53%1025 hPa

6:00 PM

Sunny

20° 💧 None 💨 3 km/h H 67%1025 hPa

7:00 PM

Clear night

17° 💧 None 💨 2 km/h H 64%1025 hPa

8:00 PM

Clear night

16° 💧 None 💨 1 km/h H 65%1024 hPa

Saturday

5:00 AM

Mostly cloudy night

11° 💧 None 💨 7 km/h H 82%1022 hPa

8:00 AM

Mostly cloudy

11° 💧 None 💨 9 km/h H 86%1023 hPa

11:00 AM

Mostly cloudy

17° 💧 None 💨 6 km/h H 69%1023 hPa

2:00 PM

Overcast

21° 💧 None 💨 14 km/h H 46%1020 hPa

5:00 PM

Overcast

20° 💧 None 💨 9 km/h H 54%1019 hPa

8:00 PM

Overcast night

16° 💧 None 💨 13 km/h H 71%1019 hPa

11:00 PM

Overcast night

15° 💧 None 💨 14 km/h H 66%1018 hPa

Sunday

2:00 AM

Overcast night

14° 💧 None 💨 13 km/h H 66%1018 hPa

5:00 AM

Overcast night

13° 💧 None 💨 14 km/h H 68%1017 hPa

8:00 AM

Overcast

13° 💧 None 💨 14 km/h H 71%1017 hPa

11:00 AM

Overcast

17° 💧 None 💨 16 km/h H 59%1017 hPa

2:00 PM

Overcast

18° 💧 None 💨 15 km/h H 59%1016 hPa

5:00 PM

Mostly cloudy

19° 💧 None 💨 17 km/h H 53%1016 hPa

8:00 PM

Overcast night

16° 💧 None 💨 18 km/h H 60%1016 hPa

11:00 PM

Overcast night

14° 💧 None 💨 13 km/h H 70%1016 hPa

Monday

2:00 AM

Light rain

14° 💧 None 💨 15 km/h H 75%1015 hPa

5:00 AM

Overcast night

13° 💧 None 💨 13 km/h H 79%1015 hPa

8:00 AM

Mostly cloudy

13° 💧 None 💨 12 km/h H 77%1015 hPa

11:00 AM

Partly cloudy

16° 💧 None 💨 13 km/h H 67%1015 hPa

2:00 PM

Overcast

18° 💧 None 💨 10 km/h H 63%1014 hPa

5:00 PM

Partly cloudy

19° 💧 None 💨 6 km/h H 62%1013 hPa

8:00 PM

Overcast night

16° 💧 None 💨 3 km/h H 79%1013 hPa

11:00 PM

Overcast night

15° 💧 None 💨 3 km/h H 83%1014 hPa

Tuesday

2:00 AM

Overcast night

14° 💧 None 💨 3 km/h H 84%1014 hPa

8:00 AM

Sunny

9° 💧 None 💨 3 km/h H 90%1014 hPa

2:00 PM

Sunny

9° 💧 None 💨 2 km/h H 91%1016 hPa

8:00 PM

Clear night

21° 💧 None 💨 2 km/h H 59%1015 hPa

Wednesday

2:00 AM

Clear night

16° 💧 None 💨 8 km/h H 82%1014 hPa

8:00 AM

Sunny

13° 💧 None 💨 7 km/h H 95%1015 hPa

2:00 PM

Mostly sunny

11° 💧 None 💨 9 km/h H 96%1015 hPa

8:00 PM

Clear night

24° 💧 None 💨 17 km/h H 53%1011 hPa

Thursday

2:00 AM

Mostly clear night

21° 💧 None 💨 15 km/h H 66%1009 hPa

8:00 AM

Mostly cloudy

21° 💧 None 💨 20 km/h H 74%1009 hPa

2:00 PM

Overcast

20° 💧 None 💨 16 km/h H 79%1010 hPa

8:00 PM

Mostly cloudy night

26° 💧 None 💨 18 km/h H 60%1006 hPa

Friday

2:00 AM

Light rain

20° 💧 None 💨 20 km/h H 89%1004 hPa

8:00 AM

Overcast

19° 💧 None 💨 20 km/h H 95%1004 hPa

2:00 PM

Overcast

17° 💧 None 💨 14 km/h H 93%1005 hPa

8:00 PM

Light rain

20° 💧 None 💨 20 km/h H 59%1005 hPa

Saturday

2:00 AM

Mostly clear night

15° 💧 None 💨 13 km/h H 63%1008 hPa

8:00 AM

Sunny

10° 💧 None 💨 12 km/h H 74%1011 hPa

2:00 PM

Mostly sunny

9° 💧 None 💨 15 km/h H 76%1013 hPa

8:00 PM

Overcast night

11° 💧 None 💨 21 km/h H 53%1016 hPa

Sunday

2:00 AM

Partly cloudy night

10° 💧 None 💨 12 km/h H 62%1019 hPa

8:00 AM

Sunny

7° 💧 None 💨 7 km/h H 72%1022 hPa

2:00 PM

Mostly cloudy

6° 💧 None 💨 6 km/h H 85%1024 hPa

8:00 PM

Partly cloudy night

14° 💧 None 💨 9 km/h H 42%1023 hPa

Monday

2:00 AM

Overcast night

11° 💧 None 💨 10 km/h H 60%1022 hPa

8:00 AM

Sunny

9° 💧 None 💨 8 km/h H 82%1022 hPa

2:00 PM

Overcast

8° 💧 None 💨 8 km/h H 87%1022 hPa

8:00 PM

Overcast night

17° 💧 None 💨 12 km/h H 51%1019 hPa

Tuesday

2:00 AM

Overcast night

14° 💧 None 💨 11 km/h H 76%1017 hPa

8:00 AM

Mostly cloudy

13° 💧 None 💨 20 km/h H 89%1015 hPa

2:00 PM

Mostly cloudy

14° 💧 None 💨 17 km/h H 82%1013 hPa

8:00 PM

Light rain

17° 💧 None 💨 23 km/h H 82%1006 hPa

Wednesday

2:00 AM

Moderate rain

16° 💧 None 💨 23 km/h H 92%1001 hPa

8:00 AM

Sunny

11° 💧 None 💨 17 km/h H 78%1003 hPa

2:00 PM

Overcast

10° 💧 None 💨 16 km/h H 73%1003 hPa

8:00 PM

Overcast night

12° 💧 None 💨 20 km/h H 58%1004 hPa

Thursday

2:00 AM

Overcast night

8° 💧 None 💨 15 km/h H 75%1006 hPa

In Ottawa 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 Ottawa

TomorrowTomorrow

Sunny 19°/6° 💧 None 💨 9 km/h

Friday, Sep 25Fri Sep 25

Mostly sunny 21°/8° 💧 None 💨 8 km/h

Saturday, Sep 26Sat Sep 26

Overcast 21°/10° 💧 None 💨 10 km/h

Sunday, Sep 27Sun Sep 27

Partly cloudy 20°/11° 💧 None 💨 14 km/h

Monday, Sep 28Mon Sep 28

Overcast 18°/14° 💧 0.3 mm 💨 14 km/h

Tuesday, Sep 29Tue Sep 29

Sunny 21°/9° 💧 None 💨 8 km/h

Wednesday, Sep 30Wed Sep 30

Mostly sunny 24°/11° 💧 None 💨 17 km/h

Thursday, Oct 1Thu Oct 1

Light rain 26°/20° 💧 2.0 mm 💨 20 km/h

Friday, Oct 2Fri Oct 2

Light rain 20°/15° 💧 2.0 mm 💨 20 km/h

Saturday, Oct 3Sat Oct 3

Mostly sunny 11°/9° 💧 None 💨 21 km/h

Sunday, Oct 4Sun Oct 4

Mostly cloudy 14°/6° 💧 None 💨 10 km/h

Monday, Oct 5Mon Oct 5

Overcast 17°/8° 💧 0.3 mm 💨 12 km/h

Tuesday, Oct 6Tue Oct 6

Moderate rain 17°/13° 💧 6.1 mm 💨 23 km/h

Wednesday, Oct 7Wed Oct 7

Overcast 12°/8° 💧 2.3 mm 💨 20 km/h

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Ottawa

Vertical axis: °C · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Ottawa

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 1:00 PM

PM2.5 Fine particles Good 2,1µg/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 2,6µg/m³

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

O₃ Ozone Fair 63,4µg/m³

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

NO₂ Nitrogen dioxide Good 1,6µg/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 Ottawa

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 4,6Moderate 🙂Fair

Tomorrow UV 4,6Moderate 🙂Fair

Friday UV 4,5Moderate 🙂Fair

Saturday UV 4,5Moderate 🙂Fair

Sunday UV 6,0High 😊Good

Monday UV 5,0Moderate —Unavailable

Tuesday UV 5,0Moderate —Unavailable

Hourly UV index today

1:00 PMUV 4,6 2:00 PMUV 4,2 3:00 PMUV 3,2 4:00 PMUV 2,0 5:00 PMUV 0,9 6:00 PMUV 0,3 7:00 PMUV 0,0

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 Ottawa

Vertical axis: km/h · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · OTTAWA, ONTARIO

Tonight's Stargazing & Shooting Stars

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

98/100Best-hour score

BEST TIME TONIGHT 5:00 AM–6:00 AM Astronomical darkness: 8:38 PM–5:14 AM

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

☾ Moonlight 94% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 59° 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 min71%

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 Ottawa were last refreshed today at 12:48 PM. The current forecast period extends through 25/09/2026 at 10:00 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.