National Weather Service

News Headlines

Hazardous Weather Conditions

Heat Advisory in effect from June 18, 12:00 PM EDT until June 18, 08:00 PM EDT

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

77°F

25°C

Humidity	54%
Wind Speed	SE 6 mph
Barometer	30.15 in
Dewpoint	59°F (15°C)
Visibility	10.00 mi
Heat Index	79°F (26°C)
Last update	16 Jun 7:35 pm EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Saint Marys PA

Heat Advisory June 18, 12:00pm until June 18, 08:00pm

Click here for hazard details and duration

Heat Advisory

Tonight
Low: 60 °F
Mostly Clear
Monday
High: 90 °F
Sunny
Monday Night
Low: 65 °F
Partly Cloudy
then Patchy
Fog
Tuesday
High: 91 °F
Chance
T-storms and
Patchy Fog
Tuesday Night
Low: 66 °F
Partly Cloudy
Juneteenth
High: 92 °F
Hot
Wednesday Night
Low: 64 °F
Partly Cloudy
Thursday
High: 93 °F
Hot
Thursday Night
Low: 66 °F
Partly Cloudy

Detailed Forecast

Tonight

Mostly clear, with a low around 60. Southeast wind 3 to 6 mph.

Monday

Sunny, with a high near 90. Southwest wind 3 to 7 mph.

Monday Night

Patchy fog after 2am. Otherwise, partly cloudy, with a low around 65. Calm wind.

Tuesday

A slight chance of showers, then a chance of showers and thunderstorms after 11am. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 91. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tuesday Night

Partly cloudy, with a low around 66. Calm wind.

Juneteenth

Mostly sunny and hot, with a high near 92.

Wednesday Night

Partly cloudy, with a low around 64.

Thursday

Mostly sunny and hot, with a high near 93.

Thursday Night

Partly cloudy, with a low around 66.

Friday

Mostly sunny and hot, with a high near 92.