St. Marys, OH Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for St. Marys, OH.

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Current Conditions — Saint Marys, OH

VAN WERT COUNTY (KVNW)

Clear and Windy

75.2 F
Humidity:27%
Wind Speed:SW 20.7 G 28.8 mph
Barometer:29.91 in
Dewpoint:39.2 F
Visibility:10.00 mi
Precip:--
Heat Index:73.8 F
Wind Chill:NA
Apr 21 2026, 04:35 PM EDT
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5-Day Forecast — Saint Marys, OH

Tuesday

High 75 °F
Mostly Cloudy
Tuesday
Night
Low 57 °F
T-storms Likely
Wednesday

High 75 °F
Chance of T-storms
Wednesday
Night
Low 57 °F
Partly Cloudy
Thursday

High 80 °F
Partly Sunny
Thursday
Night
Low 60 °F
Partly Cloudy
Friday

High 80 °F
Chance of T-storms
Friday
Night
Low 57 °F
Chance of T-storms
Saturday

High 71 °F
Rain Showers Likely

Detailed Forecast — Saint Marys, OH

Tuesday
Mostly Cloudy. High near 75°F. Wind 17 to 22 mph, with gusts as high as 32 mph.
Tuesday Night
Thunderstorms Likely. Low around 57°F. Wind 9 to 16 mph, with gusts as high as 22 mph.
Wednesday
Chance of Thunderstorms. High near 75°F. Wind 5 to 8 mph, with gusts as high as 17 mph.
Wednesday Night
Partly Cloudy. Low around 57°F. Wind 2 to 3 mph, with gusts as high as 9 mph.
Thursday
Partly Sunny. High near 80°F. Wind 5 to 9 mph, with gusts as high as 15 mph.
Thursday Night
Partly Cloudy. Low around 60°F. Wind around 6 mph, with gusts as high as 14 mph.
Friday
Chance of Thunderstorms. High near 80°F. Wind 8 to 15 mph, with gusts as high as 23 mph.
Friday Night
Chance of Thunderstorms. Low around 57°F. Wind 6 to 9 mph, with gusts as high as 17 mph.
Saturday
Rain Showers Likely. High near 71°F. Wind 7 to 10 mph, with gusts as high as 16 mph.
Saturday Night
Partly Cloudy. Low around 48°F. Wind 6 to 8 mph, with gusts as high as 16 mph.
Sunday
Partly Sunny. High near 71°F. Wind 6 to 9 mph, with gusts as high as 16 mph.
Sunday Night
Slight Chance of Showers. Low around 50°F. Wind 6 to 8 mph, with gusts as high as 16 mph.
Monday
Chance of Thunderstorms. High near 75°F. Wind 8 to 13 mph, with gusts as high as 21 mph.
OH Radar
Current Radar • OH
Day 1 Outlook • April 21, 2026

Observation History — Saint Marys, OH

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
04:35 PM EDT SW 20.7 G 28.8 10.00 Clear and Windy -- 75.2 39.2 27% NA 73.8 29.91 1012.9
04:15 PM EDT SW 19.6 G 29.9 10.00 Clear and Windy -- 75.2 39.2 27% NA 73.8 29.92 1013.2
03:55 PM EDT G 29.9 10.00 Clear -- NULL % NA NA M
03:35 PM EDT SW 20.7 G 34.5 10.00 Clear and Windy -- 73.4 39.2 29% NA 71.8 29.95 1014.2
03:15 PM EDT 10.00 NULL -- 75.2 41.0 29% NA 73.8 29.96 1014.6
02:55 PM EDT G 27.6 10.00 Clear -- NULL % NA NA M
02:35 PM EDT 21.9 G 29.9 10.00 Clear and Windy -- 73.4 42.8 33% NA 72.0 29.98 1015.2
02:15 PM EDT G 31.1 10.00 Clear -- 73.4 42.8 33% NA 72.0 29.99 1015.6
01:55 PM EDT G 29.9 10.00 Clear -- NULL % NA NA M
01:35 PM EDT SW 23.0 G 32.2 10.00 Clear and Windy -- 71.6 41.0 33% NA 70.0 30.01 1016.3
01:15 PM EDT SW 17.3 G 25.3 10.00 Clear -- 71.6 41.0 33% NA 70.0 30.02 1016.6
12:35 PM EDT 13.8 G 21.9 10.00 Clear -- 69.8 42.8 38% NA NA 30.05 1017.6
12:15 PM EDT SW 13.8 G 21.9 10.00 Clear -- 68.0 42.8 40% NA NA 30.06 1017.9
11:55 AM EDT G 20.7 10.00 Clear -- NULL % NA NA M
11:35 AM EDT G 23.0 10.00 Clear -- NULL % NA NA M
11:15 AM EDT G 27.6 10.00 Clear -- NULL % NA NA M
10:35 AM EDT 11.5 G 20.7 10.00 Clear -- 60.8 37.4 42% NA NA 30.10 1019.3
10:15 AM EDT 17.3 G 26.5 10.00 NULL -- 57.2 33.8 41% NA NA 30.11 1019.6
09:35 AM EDT 13.8 G 20.7 10.00 Clear -- 51.8 32.0 47% NA NA 30.12 1020.0
09:15 AM EDT S 16.1 10.00 NULL -- 50.0 30.2 46% NA NA 30.13 1020.3
08:35 AM EDT S 19.6 G 24.2 10.00 Clear and Windy -- 46.4 28.4 49% 39.0 NA 30.15 1021.0
08:15 AM EDT S 17.3 G 21.9 10.00 Clear -- 44.6 28.4 53% 37.2 NA 30.16 1021.3
07:55 AM EDT 10.00 Mostly Cloudy -- NULL % NA NA M
07:35 AM EDT S 11.5 10.00 Cloudy -- 44.6 28.4 53% 38.8 NA 30.16 1021.3

Regional Weather Observation

VAN WERT COUNTY (KVNW)

Clear and Windy
75.2 F

WAPAKONETA (KAXV)

Clear
73.4 F

LIMA (KAOH)

Clear and Windy
73.4 F

VERSAILLES (KVES)

Clear
77.0 F

FORT WAYNE (KFWA)

NULL
75.2 F

DEFIANCE (KDFI)

Clear
73.4 F
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