St. Louisville, OH Weather Forecast & Alerts

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

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Current Conditions — Saint Louisville, OH

MT VERNON/KNOX (K4I3)

Clear

64.4 F
Humidity:37%
Wind Speed:SW 10.3 G 23.0 mph
Barometer:30.12 in
Dewpoint:37.4 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 21 2026, 01:35 PM EDT
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5-Day Forecast — Saint Louisville, OH

Tuesday

High 71 °F
Mostly Cloudy
Tuesday
Night
Low 55 °F
T-storms Likely
Wednesday

High 71 °F
Chance of T-storms
Wednesday
Night
Low 51 °F
Partly Cloudy
Thursday

High 77 °F
Partly Sunny
Thursday
Night
Low 55 °F
Mostly Clear
Friday

High 80 °F
Isolated T-storm
Friday
Night
Low 57 °F
Isolated T-storm
Saturday

High 69 °F
Rain Showers Likely

Detailed Forecast — Saint Louisville, OH

Tuesday
Mostly Cloudy. High near 71°F. Wind 13 to 17 mph, with gusts as high as 28 mph.
Tuesday Night
Thunderstorms Likely. Low around 55°F. Wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday
Chance of Thunderstorms. High near 71°F. Wind 6 to 9 mph, with gusts as high as 17 mph.
Wednesday Night
Partly Cloudy. Low around 51°F. Wind 2 to 5 mph, with gusts as high as 10 mph.
Thursday
Partly Sunny. High near 77°F. Wind 2 to 6 mph, with gusts as high as 12 mph.
Thursday Night
Mostly Clear. Low around 55°F. Wind around 3 mph, with gusts as high as 9 mph.
Friday
Isolated T-storm. High near 80°F. Wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Isolated T-storm. Low around 57°F. Wind 5 to 7 mph, with gusts as high as 15 mph.
Saturday
Rain Showers Likely. High near 69°F. Wind 6 to 9 mph, with gusts as high as 16 mph.
Saturday Night
Chance of Showers. Low around 48°F. Wind 6 to 8 mph, with gusts as high as 16 mph.
Sunday
Partly Sunny. High near 71°F. Wind 7 to 8 mph, with gusts as high as 15 mph.
Sunday Night
Partly Cloudy. Low around 48°F. Wind 6 to 7 mph, with gusts as high as 14 mph.
Monday
Chance of Thunderstorms. High near 73°F. Wind 7 to 10 mph, with gusts as high as 18 mph.
OH Radar
Current Radar • OH
Day 1 Outlook • April 21, 2026

Observation History — Saint Louisville, 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)
01:35 PM EDT SW 10.3 G 23.0 10.00 Clear -- 64.4 37.4 37% NA NA 30.12 1019.7
01:15 PM EDT 13.8 G 19.6 10.00 Clear -- 62.6 37.4 39% NA NA 30.13 1020.3
12:55 PM EDT 10.3 G 18.3 10.00 Clear -- 62.6 35.6 36% NA NA 30.14 1020.7
12:35 PM EDT S 12.8 G 19.7 10.00 Clear -- 60.8 33.8 36% NA NA 30.15 1021.0
12:15 PM EDT 11.4 G 20.8 10.00 Clear -- 59.0 33.8 39% NA NA 30.17 1021.7
11:55 AM EDT S 11.4 G 19.7 10.00 Clear -- 57.2 32.0 38% NA NA 30.18 1022.0
11:35 AM EDT G 19.6 10.00 Clear -- NULL % NA NA M
11:15 AM EDT G 23.0 10.00 Clear -- NULL % NA NA M
10:55 AM EDT G 21.9 10.00 Clear -- 53.6 28.4 38% NA NA 30.21 1023.0
10:35 AM EDT 12.7 G 20.7 10.00 Clear -- 51.8 28.4 40% NA NA 30.21 1023.0
10:15 AM EDT S 10.4 10.00 Mostly Clear -- 50.0 28.4 43% NA NA 30.22 1023.4
09:55 AM EDT S 10.4 G 23.0 10.00 Partly Cloudy -- 48.2 24.8 40% 43.7 NA 30.23 1023.7
09:35 AM EDT S 10.3 G 16.1 10.00 Clear -- 46.4 26.6 46% 41.5 NA 30.25 1024.1
09:15 AM EDT S 11.4 10.00 NULL -- 44.6 26.6 49% 38.8 NA 30.25 1024.4
08:55 AM EDT S 10.3 10.00 Partly Cloudy -- 41.0 24.8 52% 34.7 NA 30.26 1024.7
08:35 AM EDT S 10.4 10.00 Mostly Clear -- 41.0 26.6 56% 34.7 NA 30.26 1024.7
08:15 AM EDT 6.9 10.00 Clear -- 37.4 26.6 65% 32.0 NA 30.26 1024.7
07:55 AM EDT 5.8 10.00 Clear -- 35.6 26.6 69% 30.7 NA 30.27 1025.1
07:35 AM EDT SE 5.8 10.00 Clear -- 35.6 26.6 69% 30.7 NA 30.27 1025.1
07:15 AM EDT 4.6 10.00 Clear -- 33.8 24.8 69% 29.5 NA 30.27 1025.1
06:55 AM EDT S 4.7 10.00 Clear -- 33.8 24.8 69% 29.5 NA 30.27 1025.1
06:35 AM EDT 5.8 10.00 Clear -- 33.8 24.8 69% 28.6 NA 30.27 1025.1
06:15 AM EDT 6.9 10.00 Clear -- 33.8 23.0 64% 27.7 NA 30.26 1024.7
05:55 AM EDT 6.9 10.00 Mostly Clear -- 33.8 23.0 64% 27.7 NA 30.26 1024.7

Regional Weather Observation

MT VERNON/KNOX (K4I3)

Clear
64.4 F

NEWARK (KVTA)

Clear
66.2 F

COLUMBUS (KCMH)

Clear
69.8 F

MANSFIELD (KMFD)

Clear
64.4 F

DELAWARE (KDLZ)

Clear
68.0 F

COLUMBUS/ST UNIV (KOSU)

Clear
71.6 F
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