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Hourly Forecast - Chiswick

YELLOW ADVISORY - FROST

Impact Level: Moderate

Forecast Confidence: High


Frost is expected tonight. Temperatures are expected to fall to near or below the freezing mark overnight into Thursday morning. Damage to plants, trees, and crops is possible. Take preventative measures to protect cold-sensitive plants, trees, and crops. Cover up plants, especially those in frost-prone areas. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.

In effect for:

  • North Bay - Powassan - Mattawa
Date/Time
(EDT)
Temp.
(°C)
Weather ConditionsLikelihood of precip (%) UV indexWind
(km/h)
Wind Chill
20 May 2026
22:00 8 Clear

Clear

0*N 10
*
23:00 7 Clear

Clear

0*N 15
*
21 May 2026
00:00 5 Clear

Clear

0*N 15
*
01:00 3 Clear

Clear

0*N 15
*
02:00 1 Clear

Clear

0*N 15
*
03:00 0 Clear

Clear

0*N 15
*
04:00 0 Clear

Clear

0*N 15
*
05:00 -1 A few clouds

A few clouds

0*NE 10
-5
06:00 0 Mainly sunny

Mainly sunny

0*NE 10
*
07:00 2 Mainly sunny

Mainly sunny

01NE 10
*
08:00 3 Mainly sunny

Mainly sunny

02NE 10
*
09:00 5 Mainly sunny

Mainly sunny

04NE 10
*
10:00 6 Mainly sunny

Mainly sunny

05NE 10
*
11:00 7 Sunny

Sunny

07NE 15
*
12:00 9 Sunny

Sunny

07NE 15
*
13:00 10 Sunny

Sunny

07NE 15
*
14:00 12 Sunny

Sunny

06VR 5
*
15:00 13 Sunny

Sunny

04VR 5
*
16:00 13 Sunny

Sunny

03VR 5
*
17:00 14 Sunny

Sunny

01VR 5
*
18:00 13 Sunny

Sunny

20*VR 5
*
19:00 11 Sunny

Sunny

20*VR 5
*
20:00 10 Sunny

Sunny

0*VR 5
*
21:00 9 Clear

Clear

0*VR 5
*

* Value not significant

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