XGY   Grimsby Mountain, ON Weather Observed At   43-11  N    79-34  W

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2026-08-09	6:30pm			Max		Min
Weather		----
Temperature		24.8 °C		28.2 °C	2:58pm	17.1 °C	6:56am
Relative Humidity		69 %		90 %	12:00am	50 %	2:40pm
Dew Point		18.7 °C		20.6 °C	4:26pm	14.4 °C	3:14am
Wind Velocity		209 ° at  0.3 G 2.6 kt		8.7 kt	1:30am
Pressure		29.999 "  ↓		30.070 "	1:22pm	29.948 "	12:00am
Rainfall Rate		0.0 mm/h		0.0 mm/h	----m
Snow On Ground		0 cm
Brightness / Darkness		109 W/m² /  0.00 m/"²		970 W/m²	12:53pm	20.07 m/"²	2:22am
Remarks

Rainfall	Today	0.0 mm	Storm Total	2.4 mm
Snowfall	Today	0.0 cm	Storm Total	0.0 cm

Evapotranspiration

Today

-4.04 mm

Lake Conditions

Water Temperature  21.5 °C

Waves  CALM

ICE FREE

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Meteor Index	108   Perseids
Aurora Index / Solar	9   Quiet   - 3 nT	Solar Flux   94  sfu  /   S 0    G 0    R 0   /  MUF   20.5 MHz

Sunrise	6:19am	Sunset	8:30pm
Moonrise	N/A	Moonset	N/A	Moon Phase	Waning Crescent

Grimsby Mountain Weather Maps
Local	Regional	Area	Synoptic
updated H+09 and every 10m	updated H+19 and H+49	updated H+19

Ontario 6-Hour Meteorological Summary

Canadian 6-Hour Meteorological Summaries

CLIMAT Data
Official	Yesterday					2004	2005	2006	2007	2008	2009	Normals & Records
		2010	2011	2012	2013	2014	2015	2016	2017	2018	2019
		2020	2021	2022	2023	2024	2025	2026

Grimsby Mountain Charts

	Sky Quality (Darkness) Meter courtesy of

              

Wx Map	Sat Pix	IR Sat Pix	Radar	Lightning
	Water	Ice

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  This is a privately operated weather station that is part of the Meteorological Service of Canada's official observing network.
Permission to publish the weather statistics found on this website is not required.
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