Ottawa, Canada

Last updated: 6:13 PM CDT  ·  Refresh
21°C
Feels like 22°
Partly Cloudy
▲ 24°  /  ▼ 15°
Wind
4 mph NNE
Humidity
78%
Dew Point
17°
Pressure
29.50 inHg
Visibility
10 mi
UV Index
2.4
Cloud Cover
47%
Sunrise
6:00 AM
Sunset
8:14 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Ottawa is currently partly cloudy at 21°C. Precipitation is likely — peak probability 81% around 7 PM. Atmospheric instability is elevated (CAPE up to 1000 J/kg) — isolated convective development possible. Sunrise: 6:00AM · Sunset: 8:14PM.

Alerts

No active alerts for this location.
33 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
21°
80%
8 PM
21°
61%
9 PM
19°
65%
10 PM
19°
72%
11 PM
18°
49%
12 AM
18°
39%
1 AM
18°
36%
2 AM
18°
18%
3 AM
17°
23%
4 AM
17°
24%
5 AM
15°
24%
6 AM
15°
24%
7 AM
16°
13%
8 AM
17°
21%
9 AM
19°
23%
10 AM
21°
23%
11 AM
22°
26%
12 PM
22°
36%
1 PM
23°
27%
2 PM
24°
27%
3 PM
24°
28%
4 PM
24°
31%
5 PM
23°
31%
6 PM
22°
24%
7-Day Forecast
Tonight
24° 15°
Partly Cloudy with a 80% chance of rain.
Thu
26° 14°
Partly Cloudy with a 36% chance of rain.
Fri
23° 13°
Mostly Clear with a 27% chance of rain.
Sat
23° 12°
Partly Cloudy.
Sun
21° 14°
Partly Cloudy with a 34% chance of rain.
Mon
22° 13°
Partly Cloudy with a 36% chance of rain.
Tue
26° 12°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 21° Partly Cloudy 80% 4 mph NNE 78%
8 PM 21° Mostly Clear 61% 3 mph NE 85%
9 PM 19° Partly Cloudy 65% 2 mph ESE 89%
10 PM 19° Partly Cloudy 72% 2 mph E 93%
11 PM 18° Mostly Cloudy 49% 3 mph E 96%
12 AM 18° Rain 39% 2 mph E 96%
1 AM 18° Overcast 36% 2 mph S 97%
2 AM 18° Overcast 18% 3 mph NW 97%
3 AM 17° Mostly Cloudy 23% 2 mph NW 97%
4 AM 17° Mostly Cloudy 24% 3 mph WNW 96%
5 AM 15° Mostly Cloudy 24% 3 mph WNW 96%
6 AM 15° Mostly Cloudy 24% 2 mph WNW 96%
7 AM 16° Fog 13% 3 mph NW 95%
8 AM 17° Haze 21% 4 mph NW 92%
9 AM 19° Partly Cloudy 23% 4 mph WNW 85%
10 AM 21° Partly Cloudy 23% 5 mph WNW 78%
11 AM 22° Mostly Clear 26% 6 mph WNW 71%
12 PM 22° Mostly Clear 36% 7 mph WNW 66%
1 PM 23° Partly Cloudy 27% 8 mph WNW 61%
2 PM 24° Partly Cloudy 27% 8 mph WNW 57%
3 PM 24° Partly Cloudy 28% 8 mph WNW 56%
4 PM 24° Mostly Clear 31% 8 mph WNW 57%
5 PM 23° Mostly Clear 31% 8 mph NW 58%
6 PM 22° Mostly Clear 24% 8 mph NW 62%
15-Day Forecast
Today
8/12
Partly Cloudy
80%
15°
24°
Thu
8/13
Partly Cloudy
36%
14°
26°
Fri
8/14
Mostly Clear
27%
13°
23°
Sat
8/15
Partly Cloudy
13%
12°
23°
Sun
8/16
Partly Cloudy
34%
14°
21°
Mon
8/17
Partly Cloudy
36%
13°
22°
Tue
8/18
Clear
19%
12°
26°
Wed
8/19
Drizzle
54%
14°
25°
Thu
8/20
Rain
73%
14°
24°
Fri
8/21
Rain
72%
14°
26°
Sat
8/22
Drizzle
56%
14°
27°
Sun
8/23
Drizzle
60%
11°
27°
Mon
8/24
Drizzle
60%
11°
22°
Tue
8/25
Drizzle
60%
10°
23°
Wed
8/26
Drizzle
60%
11°
23°
33
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
33 AQI 5.9 µg/m³
O3
Ground-level ozone
21 AQI 23 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 33 Good 21 33
Fri 28 Good 22 28
Sat 22 Good 18 22
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Wed Aug 12, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 90 100 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE899 J/kg
MLCAPE622 J/kg
MUCAPE1115 J/kg
SBCIN-113 J/kg
MLCIN0 J/kg
Lifted Index-3.4
Kinematics
0–6 km Shear40 kt
0–1 km Shear13 kt
Eff. Shear35 kt
0–1 km SRH87
0–3 km SRH104
Eff. SRH104
Storm Motion311° @ 26 kt
0–1 km EHI0.5
Composite Parameters
Sig. Tornado0.4
STP (eff)0.2
Supercell2.1
K-Index29.8
Thermo & Levels
PWAT1.17 in
0–3 km LR6.8 °C/km
700–500 LR6.0 °C/km
Total Totals50.2
LCL940 hPa
LFC827 hPa
EL278 hPa
Freezing Lvl10,164 ft