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Area Conditions for St Marys, ON
 
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Temperature: 16 oC
Feels Like: 16 oC
Humidity: 90%
Barometer: 30.03
Dew Point: 14 oC
Wind Dir.: SSE
Wind Speed: 4 km/h
Sunrise: 5:53
Sunset: 9:06
Observation: Partly Cloudy
As reported at HPSTS St Mary's, ON at 5:00 AM

5-day Forecast for St Marys, ON
Date Wed
9 Jul
Thu
10 Jul
Fri
11 Jul
Sat
12 Jul
Sun
13 Jul
Weather Condition Thunder Storms Mostly Cloudy Partly Cloudy Thunder Storms Thunder Storms
Weather Thunder Storms Mostly Cloudy Partly Cloudy Thunder Storms Thunder Storms
Temperature (°C)
Low/High
16/23 17/26 14/28 18/29 19/26
Feels Like (°C)
Low/High
16/24 17/26 14/28 18/32 19/26
Dew Point (°C) 17 17 16 18 18
Humidity (%) 80 68 59 66 70
Wind Speed (kph) 11 10 5 16 16
Precipitation
Chance
(%)
45 - - 42 65
Precipitation
Amount
(cm)
S=Snow, L=Liquid
Rain
1.19
None None Rain
0.38
Rain
0.58
Evapo-
transpiration

(cm/day)
0.3 0.41 0.48 0.53 0.43
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DTN Weather Summary

Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Storms Moving Through Southeast, Northern Plains Wednesday
Posted at 12:05PM Tue Jul 8, 2025 CDT
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