Hourly Forecast - Astorville

YELLOW WARNING - HEAT

10:56 AM EDT Wednesday 15 July 2026

Impact Level: Moderate

Forecast Confidence: High

A heat event continues. What: Maximum temperatures near 29 degrees Celsius. When: Ending this evening. Additional information: Widespread wildfire smoke may limit daytime heating, leading to cooler temperatures than expected. Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high-risk category. Take action to protect yourself and others – extreme heat can affect everyone’s health. Determine if you or others around you are at greater risk of heat illness. Check on older adults, those living alone and other at-risk people in-person or on the phone multiple times a day. Watch for the early signs of heat exhaustion in yourself and others. Signs may include headache, nausea, dizziness, thirst, dark urine and intense fatigue. Stop your activity and drink water. Heat stroke is a medical emergency! Call 9-1-1 or your emergency health provider if you, or someone around you, is showing signs of heat stroke which can include red and hot skin, dizziness, nausea, confusion and change in consciousness. While you wait for medical attention, try to cool the person by moving them to a cool place, removing extra clothing, applying cold water or ice packs around the body. Drink water often and before you feel thirsty to replace fluids. Close blinds, or shades and open windows if outside is cooler than inside. Turn on air conditioning, use a fan, or move to a cooler area of your living space. If your living space is hot, move to a cool public space such as a cooling centre, community centre, library or shaded park. Follow the advice of your region’s public health authority. Plan and schedule outdoor activities during the coolest parts of the day. Limit direct exposure to the sun and heat. Wear lightweight, light-coloured, loose-fitting clothing and a wide-brimmed hat. Never leave people, especially children, or pets inside a parked vehicle. Check the vehicle before locking to make sure no one is left behind. For more information: How to protect yourself from the health effects of extreme heat Health risks and who is at risk of extreme heat events 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 Conditions	Likelihood of precip (%)	UV index	Wind (km/h)	Humidex
15 July 2026
14:00	27	Smoke	20	7	NW 30 gusts 50	29
15:00	27	Smoke	20	5	NW 30 gusts 50	30
16:00	28	Smoke	20	3	NW 30 gusts 50	31
17:00	28	Smoke	20	2	NW 20 gusts 40	31
18:00	27	Smoke	10	1	NW 20 gusts 40	30
19:00	26	Smoke	10	*	NW 20 gusts 40	29
20:00	25	Smoke	10	*	NW 10	28
21:00	24	Smoke	10	*	NW 10	27
22:00	22	Smoke	10	*	NW 10	25
23:00	21	Smoke	10	*	N 20	*
16 July 2026
00:00	20	Smoke	10	*	N 20	*
01:00	18	Smoke	10	*	N 20	*
02:00	17	Smoke	10	*	VR 5	*
03:00	16	Smoke	10	*	VR 5	*
04:00	16	Smoke	10	*	VR 5	*
05:00	15	Smoke	10	*	NW 20	*
06:00	16	Mainly sunny	10	*	NW 20	*
07:00	17	Mainly sunny	10	1	NW 20	*
08:00	18	Mainly sunny	10	2	NW 30 gusts 50	*
09:00	19	Mainly sunny	10	4	NW 30 gusts 50	*
10:00	20	Sunny	10	5	NW 30 gusts 50	*
11:00	21	Sunny	10	7	NW 30 gusts 50	*
12:00	23	Sunny	10	8	NW 30 gusts 50	26
13:00	24	Sunny	10	7	NW 30 gusts 50	26

* Value not significant

How to Use

How to use

Add to shortcuts
- Go to the desired page on the site, open the Weather shortcuts menu and click on the "Add to shortcuts" button
- Page name will display in the "Add this page" window, the name can be changed by highlighting the text and entering the desired name
- Click on the "Save" button to add the link to the list
- Click on the "X" button to close the panel
Delete a link
- Click on the "Organize shortcuts" button
- Select the link to delete
- Click on the "Delete" button to remove the link from the list
- Click on the "Close" button to save the change
Move a link up/down the list
- Click on the "Organize shortcuts" button
- Click and hold the link and move to new location in the list
- Click on the "Close" button to save the change
Rename a link
- Click on the "Organize shortcuts" button
- Select the link to rename
- Click on the "Rename" button and change the link name
- Click the enter or tab key
- Click on the "Close" button to save the change
Keyboard navigation
- Use the Tab key to move to a button or link
- Use the Enter key to click on buttons or links
- Organize shortcuts navigation
  - Use the ↑ Up key to select the link above. If none are selected, it will select the first link.
  - Use the ↓ Down key to select the link below. If none are selected, it will select the last link.
  - Use the Page Up key to move a selection up in the list.
  - Use the Page Down key to move a selection down in the list.
Restore default list

Warning: Clicking on the button below will remove all your customized links.