Forecast - Environment Canada
Observed at: Thunder Bay Airport
Date: Wednesday April 25, 2018 at 14:00 EDT
Partly Cloudy
Partly Cloudy
Temp.: 10.0 °C
Wind: S 19 gust 29 km/h
Humidity: 37 %
Dew point: -4.0 °C
Pressure: 102.0 kPa
Tendency: falling
Visibility: 32.2 km
Sunrise: 06:49
Sunset: 21:01
Normals:
Max 12°C Min -1°C
Yesterday
  Max: 13.2 °C
  Min: -3.0 °C
  Rainfall: Trace mm

 Extended Forecast - Environment Canada
Wednesday
Mainly sunny
Mainly sunny
Max: 10°C
Thursday
Periods of rain mixed with snow
Periods of rain mixed with snow
Max: 8°C
Friday
Chance of rain showers or flurries (30%)
Chance of rain showers or flurries
Max: 4°C
Saturday
A mix of sun and cloud
A mix of sun and cloud
Max: 9°C
Sunday
Sunny
Sunny
Max: 16°C
Monday
A mix of sun and cloud
A mix of sun and cloud
Max: 18°C
Tuesday
Chance of showers (60%)
Chance of showers
Max: 16°C
Wednesday night
A few clouds
A few clouds
Min: 1°C
Thursday night
Chance of flurries (40%)
Chance of flurries
Min: -7°C
Friday night
Chance of rain showers or flurries (30%)
Chance of rain showers or flurries
Min: -5°C
Saturday night
Cloudy periods
Cloudy periods
Min: -3°C
Sunday night
Clear
Clear
Min: 4°C
Monday night
Cloudy periods
Cloudy periods
Min: 7°C
 

Forecast

Thunder Bay, ON (Issued: Wednesday April 25, 2018 at 11:30 EDT)

Today
Mainly sunny. Wind becoming south 20 km/h this afternoon. High 10. UV index 5 or moderate.
Tonight
A few clouds. Increasing cloudiness after midnight. Wind south 20 km/h becoming light this evening. Low plus 1.
Thursday
Cloudy. Periods of rain mixed with snow beginning in the morning and ending early in the afternoon. Clearing late in the afternoon. Wind becoming north 20 km/h gusting to 40 in the morning. High 8.
Thursday night
Cloudy with 40 percent chance of flurries. Low minus 7.
Friday
A mix of sun and cloud with 30 percent chance of rain showers or flurries. High plus 4.
Friday night
Cloudy periods with 30 percent chance of rain showers or flurries. Low minus 5.
Saturday
A mix of sun and cloud. High 9.
Saturday night
Cloudy periods. Low minus 3.
Sunday
Sunny. High 16.
Sunday night
Clear. Low plus 4.
Monday
A mix of sun and cloud. High 18.
Monday night
Cloudy periods. Low 7.
Tuesday
Cloudy with 60 percent chance of showers. High 16.
Averages and extremes
Highest temperature(1942-2004)24.2 °C1999
Lowest temperature(1942-2004)-8.3 °C1967
Average high11.7 °C 
Average low-1.2 °C 
Average5.3 °C 
Greatest rainfall(1942-2003)7.4 mm1986
Greatest snowfall(1942-2003)19.8 cm1950
Greatest precipitation(1942-2004)19.8 mm1950
Most snow on the ground(1955-2004)6.0 cm1992
Monthly frequency of precipitationn/a 

24 Hour Forecast - Thunder Bay, ON

Date/Time
(EDT)
Temp.
(°C)

Weather Conditions

LOP †
Wind
(km/h)
25 April 2018
15:00 9 Mainly sunny (0%)  Mainly sunny Nil S 20
16:00 9 Mainly sunny (0%)  Mainly sunny Nil S 20
17:00 10 Mainly sunny (0%)  Mainly sunny Nil S 20
18:00 9 Mainly sunny (0%)  Mainly sunny Nil S 20
19:00 9 Mainly sunny (0%)  Mainly sunny Nil S 20
20:00 8 Mainly sunny (0%)  Mainly sunny Nil VR 5
21:00 6 A few clouds (0%)  A few clouds Nil VR 5
22:00 5 A few clouds (0%)  A few clouds Nil VR 5
23:00 3 A few clouds (0%)  A few clouds Nil VR 5
26 April 2018
00:00 2 A few clouds (0%)  A few clouds Nil VR 5
01:00 2 A few clouds (0%)  A few clouds Nil VR 5
02:00 1 A few clouds (0%)  A few clouds Nil VR 5
03:00 1 Mainly cloudy (0%)  Mainly cloudy Nil VR 5
04:00 1 Mainly cloudy (0%)  Mainly cloudy Nil VR 5
05:00 1 Mainly cloudy (0%)  Mainly cloudy Nil VR 5
06:00 1 Cloudy (0%)  Cloudy Nil SW 10
07:00 1 Cloudy (0%)  Cloudy Nil SW 10
08:00 1 Periods of rain mixed with snow (100%)  Periods of rain mixed with snow High SW 10
09:00 2 Periods of rain mixed with snow (100%)  Periods of rain mixed with snow High N 20 gust 40
10:00 3 Periods of rain mixed with snow (100%)  Periods of rain mixed with snow High N 20 gust 40
11:00 4 Periods of rain mixed with snow (100%)  Periods of rain mixed with snow High N 20 gust 40
12:00 4 Periods of rain mixed with snow (100%)  Periods of rain mixed with snow High N 20 gust 40
13:00 5 Cloudy (0%)  Cloudy Nil N 20 gust 40
14:00 5 Mainly cloudy (0%)  Mainly cloudy Nil N 20 gust 40
 
† 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