Forecast - Environment Canada
Observed at: Thunder Bay Airport
Date: Wednesday August 21, 2019 at 14:00 EDT
Mostly Cloudy
Mostly Cloudy
Temp.: 19.7 °C
Wind: NW 18 gust 30 km/h
Humidity: 46 %
Dew point: 8.0 °C
Pressure: 101.5 kPa
Tendency: rising
Visibility: 32.2 km
Sunrise: 06:59
Sunset: 21:02
Normals:
Max 22°C Min 9°C
Yesterday
  Max: 22.5 °C
  Min: 9.5 °C
  Rainfall: 11.7 mm

 Extended Forecast - Environment Canada
Wednesday
A mix of sun and cloud
A mix of sun and cloud
Max: 20°C
Thursday
Mainly cloudy
Mainly cloudy
Max: 18°C
Friday
Sunny
Sunny
Max: 21°C
Saturday
Sunny
Sunny
Max: 22°C
Sunday
Chance of showers (60%)
Chance of showers
Max: 20°C
Monday
Periods of rain
Periods of rain
Max: 21°C
Tuesday
Sunny
Sunny
Max: 23°C
Wednesday night
Partly cloudy
Partly cloudy
Min: 8°C
Thursday night
Clear
Clear
Min: 5°C
Friday night
Clear
Clear
Min: 8°C
Saturday night
Clear
Clear
Min: 12°C
Sunday night
Periods of rain
Periods of rain
Min: 15°C
Monday night
Chance of showers (60%)
Chance of showers
Min: 12°C
 

Forecast

Thunder Bay, ON (Issued: Wednesday August 21, 2019 at 11:30 EDT)

Today
A mix of sun and cloud. Wind northwest 20 km/h gusting to 40. High 20. UV index 5 or moderate.
Tonight
Partly cloudy. Fog patches developing overnight. Wind northwest 20 km/h gusting to 40 becoming light this evening. Low 8.
Thursday
Mainly cloudy. Fog patches dissipating in the morning. High 18. UV index 5 or moderate.
Thursday night
Clear. Low plus 5.
Friday
Sunny. High 21.
Friday night
Clear. Low 8.
Saturday
Sunny. High 22.
Saturday night
Clear. Low 12.
Sunday
Cloudy with 60 percent chance of showers. High 20.
Sunday night
Periods of rain. Low 15.
Monday
Periods of rain. High 21.
Monday night
Cloudy with 60 percent chance of showers. Low 12.
Tuesday
Sunny. High 23.
Averages and extremes
Highest temperature(1941-2004)33.3 °C1942
Lowest temperature(1941-2004)1.5 °C2004
Average high22.6 °C 
Average low9.7 °C 
Average16.2 °C 
Greatest rainfall(1941-2003)21.1 mm1974
Greatest snowfall(1941-2003)0.0 cm1941
Greatest precipitation(1941-2004)21.1 mm1974
Most snow on the ground(1955-2004)0.0 cm1955
Monthly frequency of precipitationn/a 

24 Hour Forecast - Thunder Bay, ON

Date/Time
(EDT)
Temp.
(°C)

Weather Conditions

LOP †
Wind
(km/h)
21 August 2019
15:00 19 A mix of sun and cloud (20%)  A mix of sun and cloud Low NW 20 gust 40
16:00 19 A mix of sun and cloud (20%)  A mix of sun and cloud Low NW 20 gust 40
17:00 20 A mix of sun and cloud (20%)  A mix of sun and cloud Low NW 20 gust 40
18:00 18 A mix of sun and cloud (20%)  A mix of sun and cloud Low NW 20 gust 40
19:00 17 A mix of sun and cloud (20%)  A mix of sun and cloud Low NW 20 gust 40
20:00 15 A mix of sun and cloud (20%)  A mix of sun and cloud Low N 10
21:00 14 Partly cloudy (20%)  Partly cloudy Low N 10
22:00 13 Partly cloudy (20%)  Partly cloudy Low N 10
23:00 12 Partly cloudy (20%)  Partly cloudy Low VR 5
22 August 2019
00:00 11 Partly cloudy (10%)  Partly cloudy Low VR 5
01:00 11 Partly cloudy (10%)  Partly cloudy Low VR 5
02:00 10 Partly cloudy (10%)  Partly cloudy Low VR 5
03:00 9 Partly cloudy (10%)  Partly cloudy Low VR 5
04:00 9 Partly cloudy (10%)  Partly cloudy Low VR 5
05:00 8 Partly cloudy (10%)  Partly cloudy Low VR 5
06:00 8 Partly cloudy (10%)  Partly cloudy Low VR 5
07:00 9 A mix of sun and cloud (10%)  A mix of sun and cloud Low VR 5
08:00 9 A mix of sun and cloud (10%)  A mix of sun and cloud Low N 10
09:00 10 Mainly cloudy (10%)  Mainly cloudy Low N 10
10:00 12 Mainly cloudy (20%)  Mainly cloudy Low N 10
11:00 13 Mainly cloudy (20%)  Mainly cloudy Low N 10
12:00 14 Mainly cloudy (20%)  Mainly cloudy Low N 10
13:00 16 Mainly cloudy (20%)  Mainly cloudy Low N 10
14:00 17 Mainly cloudy (20%)  Mainly cloudy Low N 10
 
† Likelihood of Precipitation (LOP) as described in the public forecast as a chance of measurable precipitation for a period of time.
  Nil: 0%
  Low: 40% or below
  Medium: 60% or 70%
  High: Above 70%

Environment Canada