Forecast - Environment Canada
Observed at: Thunder Bay Airport
Date: Tuesday August 14, 2018 at 18:00 EDT
Partly Cloudy
Partly Cloudy
Temp.: 24.9 °C
Humidex: 28
Wind: NNE 8 km/h
Humidity: 49 %
Dew point: 13.6 °C
Pressure: 101.3 kPa
Tendency: falling
Visibility: 32.2 km
Sunrise: 06:49
Sunset: 21:14
Normals:
Max 23°C Min 10°C
Yesterday
  Max: 29.6 °C
  Min: 11.6 °C
  Rainfall: 0.0 mm

 Extended Forecast - Environment Canada
  Wednesday
Mainly sunny
Mainly sunny
Max: 22°C
Thursday
A mix of sun and cloud
A mix of sun and cloud
Max: 28°C
Friday
A mix of sun and cloud
A mix of sun and cloud
Max: 27°C
Saturday
Chance of showers (30%)
Chance of showers
Max: 28°C
Sunday
Chance of showers (30%)
Chance of showers
Max: 27°C
Monday
Chance of showers (30%)
Chance of showers
Max: 21°C
Tuesday night
Partly cloudy
Partly cloudy
Min: 11°C
Wednesday night
A few clouds
A few clouds
Min: 11°C
Thursday night
Clear
Clear
Min: 13°C
Friday night
Chance of showers (30%)
Chance of showers
Min: 12°C
Saturday night
Cloudy periods
Cloudy periods
Min: 14°C
Sunday night
Chance of showers (30%)
Chance of showers
Min: 14°C

Forecast

Thunder Bay, ON (Issued: Tuesday August 14, 2018 at 16:00 EDT)

Tonight
Partly cloudy. Clearing before morning. Fog patches developing overnight. Low 11.
Wednesday
Mainly sunny. Fog patches dissipating in the morning. High 22. Humidex 25. UV index 8 or very high.
Wednesday night
A few clouds. Fog patches developing overnight. Low 11.
Thursday
A mix of sun and cloud. High 28.
Thursday night
Clear. Low 13.
Friday
A mix of sun and cloud. High 27.
Friday night
Cloudy periods with 30 percent chance of showers. Low 12.
Saturday
A mix of sun and cloud with 30 percent chance of showers. High 28.
Saturday night
Cloudy periods. Low 14.
Sunday
A mix of sun and cloud with 30 percent chance of showers. High 27.
Sunday night
Cloudy periods with 30 percent chance of showers. Low 14.
Monday
A mix of sun and cloud with 30 percent chance of showers. High 21.
Averages and extremes
Highest temperature(1941-2004)33.9 °C1991
Lowest temperature(1941-2004)2.2 °C1997
Average high23.6 °C 
Average low10.6 °C 
Average17.1 °C 
Greatest rainfall(1941-2003)7.1 mm1944
Greatest snowfall(1941-2003)0.0 cm1941
Greatest precipitation(1941-2004)7.1 mm1944
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)

Humidex
14 August 2018
19:00 23 A mix of sun and cloud (10%)  A mix of sun and cloud Low NW 10 25
20:00 22 A mix of sun and cloud (10%)  A mix of sun and cloud Low NW 10
21:00 21 Partly cloudy (10%)  Partly cloudy Low NE 10
22:00 19 Partly cloudy (10%)  Partly cloudy Low NE 10
23:00 18 Partly cloudy (10%)  Partly cloudy Low NE 10
15 August 2018
00:00 16 Partly cloudy (0%)  Partly cloudy Nil NE 10
01:00 15 Partly cloudy (0%)  Partly cloudy Nil NE 10
02:00 13 Partly cloudy (0%)  Partly cloudy Nil NE 10
03:00 12 Partly cloudy (0%)  Partly cloudy Nil VR 5
04:00 12 A few clouds (0%)  A few clouds Nil VR 5
05:00 11 Clear (0%)  Clear Nil VR 5
06:00 12 Clear (0%)  Clear Nil VR 5
07:00 12 Sunny (0%)  Sunny Nil VR 5
08:00 13 Sunny (0%)  Sunny Nil VR 5
09:00 14 Sunny (0%)  Sunny Nil VR 5
10:00 16 Sunny (0%)  Sunny Nil VR 5
11:00 17 Sunny (0%)  Sunny Nil VR 5
12:00 18 Mainly sunny (10%)  Mainly sunny Low SE 10
13:00 19 Mainly sunny (10%)  Mainly sunny Low SE 10
14:00 20 Mainly sunny (10%)  Mainly sunny Low SE 10
15:00 21 Mainly sunny (10%)  Mainly sunny Low SE 10
16:00 21 Mainly sunny (10%)  Mainly sunny Low SE 10
17:00 22 Mainly sunny (10%)  Mainly sunny Low SE 10 25
18:00 21 Mainly sunny (10%)  Mainly sunny Low SE 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%
‡ Value not significant

Environment Canada