Callao, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Callao, a city in Macon County, Missouri.
This Afternoon
91°F
Mostly Sunny
Mostly sunny, with a high near 91. Heat index values as high as 96. Southwest wind around 7 mph.
7-day forecast for Callao
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 91°F | Mostly Sunny | 7 mph SW | 1% |
| Tonight | 67°F | Chance Showers And Thunderstorms | 6 mph WSW | 42% |
| Sunday | 78°F | Chance Showers And Thunderstorms | 2 to 8 mph NNW | 50% |
| Sunday Night | 59°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 10 mph NE | 75% |
| Monday | 67°F | Showers And Thunderstorms | 10 mph NE | 75% |
| Monday Night | 54°F | Chance Rain Showers | 9 mph NNE | 29% |
| Tuesday | 64°F | Mostly Cloudy | 10 mph NNE | 11% |
| Tuesday Night | 49°F | Mostly Cloudy | 5 to 8 mph NNE | 4% |
| Wednesday | 67°F | Mostly Sunny | 6 mph NE | 0% |
| Wednesday Night | 50°F | Partly Cloudy | 5 mph NE | 2% |
| Thursday | 71°F | Partly Sunny | 5 mph ENE | 5% |
| Thursday Night | 56°F | Mostly Cloudy then Slight Chance Rain Showers | 3 mph ENE | 19% |
| Friday | 75°F | Chance Rain Showers | 2 to 6 mph E | 26% |
| Friday Night | 57°F | Mostly Cloudy | 5 mph ENE | 14% |
Forecast source: National Weather Service (api.weather.gov) for Callao (39.762, -92.623). Updated through the day.
Growing snapshot for Callao
Last spring frost
Apr 8
First fall frost
Oct 28
Growing season
201 days
Hardiness zone
6a
More local growing data for Callao: nearby ZIP 63534 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Long Branch Rsvr, Mo (7.6 mi from Callao). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.