Mason, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mason, a city in Warren County, Ohio.
Overnight
61°F
Patchy Fog
Patchy fog after 5am. Partly cloudy, with a low around 61. East wind around 5 mph.
7-day forecast for Mason
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Patchy Fog | 5 mph E | 2% |
| Saturday | 83°F | Areas Of Fog then Chance Rain Showers | 6 mph SE | 42% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph S | 62% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 48% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 10 mph NE | 48% |
| Monday | 76°F | Chance Showers And Thunderstorms | 12 mph NE | 49% |
| Monday Night | 58°F | Chance Showers And Thunderstorms | 8 to 13 mph NE | 50% |
| Tuesday | 73°F | Chance Showers And Thunderstorms | 12 mph NE | 45% |
| Tuesday Night | 58°F | Chance Showers And Thunderstorms | 6 to 12 mph NE | 42% |
| Wednesday | 72°F | Chance Rain Showers | 9 mph N | 32% |
| Wednesday Night | 57°F | Chance Showers And Thunderstorms | 5 to 10 mph N | 32% |
| Thursday | 72°F | Partly Sunny | 6 to 9 mph N | 11% |
| Thursday Night | 56°F | Mostly Cloudy | 5 to 9 mph N | 11% |
| Friday | 72°F | Partly Sunny | 5 to 9 mph N | 6% |
Forecast source: National Weather Service (api.weather.gov) for Mason (39.352, -84.302). Updated through the day.
Growing snapshot for Mason
Last spring frost
Apr 22
First fall frost
Oct 18
Growing season
178 days
Hardiness zone
6b
More local growing data for Mason: nearby ZIP 45040 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
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Hunter
Kings Mills
Landen
Lebanon
Loveland Park
Maineville
Morrow
Pleasant Plain
Roachester
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Springboro
Waynesville
Climate data from the nearest NOAA station, Hamilton Butler Co Rgnl Ap, Oh (11.3 mi from Mason). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.