Weather Grant Island long-term weather forecast

Long-term weather forecast for Grant Island for ten days.

Wednesday, Sep 10

73 / 57°F

0.00 in

8 mph

57 °F	57 °F	2 am
59 °F	59 °F	8 am
73 °F	73 °F	2 pm
66 °F	68 °F	8 pm

sunrise 6:42 am
sunset 7:28 pm

HOURLY

During the day morning clear, later morning overcast. The highest temperature 73 °F. Total rainfall 0.00 in. At night overcast. The lowest temperature 57 °F.

Interactive map weather Ontario

GPS: 44.4668; -77.2995

altitude: 446 ft
local time:

PLACES IN THE AREA

Weather forecast Grant Island, Ontario extended forecast

Time			Precip.	Wind	Pressure	Humidity	Dew	total	Fog	Low	Middle	High
Wednesday 09/10/2025
2 AM	clear	57 °F 57 °F	0.0 in	11 fps 8 mph south	30.1 in	86 %	52 °F	0 %	0%	0%	0%	0%
8 AM	overcast	59 °F 59 °F	0.0 in	9 fps 6 mph south	30.1 in	85 %	54 °F	100 %	0%	0%	0%	100%
2 PM	overcast	73 °F 73 °F	0.0 in	11 fps 8 mph south-southwest	30.0 in	50 %	54 °F	100 %	0%	0%	0%	100%
8 PM	overcast	66 °F 66 °F	0.00 in	8 fps 5 mph southwest	30.0 in	66 %	54 °F	99 %	0%	7%	99%	0%
Thursday 09/11/2025
2 AM	overcast	55 °F 54 °F	0.0 in	14 fps 10 mph north	30.1 in	82 %	50 °F	93 %	0%	28%	92%	0%
8 AM	clear	50 °F 46 °F	0.0 in	13 fps 9 mph north	30.2 in	74 %	41 °F	0 %	0%	0%	0%	0%
2 PM	partly cloudy	61 °F 57 °F	0.0 in	12 fps 8 mph north	30.2 in	39 %	34 °F	25 %	0%	25%	0%	0%
8 PM	cloudy	54 °F 50 °F	0.0 in	8 fps 5 mph north	30.2 in	50 %	34 °F	40 %	0%	40%	3%	0%

Grant Island, Ontario - information

State: Ontario

GPS coordinates: 44.4668; -77.2995

Time zone: America / Toronto time difference in hours with time in NY is -6 hours

Altitude: 446 ft
The administrative part:

Ontario, Toronto

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Weather Grant Island, Ontario. Weather forecast Grant Island.

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Data source

Weather forecast for Grant Island is supplied by MET Norway Norwegian Meteorological Institute and the NRK.

Feels like

To calculate the perceived temperature, we use the Australian Apparent Temperature (AAT) model, which is designed for year-round calculations and takes air humidity into account in addition to temperature and wind speed.

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Astronomical information Grant Island

data are always in the local time

Sun and light

Sept. 10, 2025

Sunrise:	Sunset:
6:42 am	7:28 pm
Noon:	Length of day:
1:06 pm	12:46
Start of civil twilight*:	End of civil twilight*:
6:12 am	7:58 pm
Start of nautical twilight*:	End of nautical twilight*:
5:38 am	8:32 pm
Start of astronomical twilight*:	End of astronomical twilight*:
5:01 am	9:09 pm
* What is Twilight?

Moon and moon phases

Moonrise:	Moonset:
09/09/2025 8:17 pm	09/10/2025 10:15 am
Next new moon:	Next full moon:
09/21/2025	10/06/2025