Callao, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Callao, a city in Macon County, Missouri.
Today
89°F
Sunny
Sunny, with a high near 89. South southwest wind around 7 mph.
7-day forecast for Callao
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Sunny | 7 mph SSW | 2% |
| Tonight | 69°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SE | 21% |
| Wednesday | 85°F | Showers And Thunderstorms Likely | 3 to 7 mph SE | 65% |
| Wednesday Night | 65°F | Showers And Thunderstorms Likely | 7 mph NNE | 88% |
| Thursday | 84°F | Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 mph ENE | 88% |
| Thursday Night | 65°F | Mostly Clear | 3 mph ESE | 7% |
| Friday | 86°F | Mostly Sunny | 1 to 5 mph SSE | 11% |
| Friday Night | 68°F | Slight Chance Showers And Thunderstorms | 3 mph S | 18% |
| Saturday | 89°F | Slight Chance Showers And Thunderstorms then Sunny | 3 to 8 mph SSW | 16% |
| Saturday Night | 72°F | Mostly Clear | 6 to 10 mph S | 6% |
| Sunday | 91°F | Sunny | 9 to 14 mph SSW | 5% |
| Sunday Night | 72°F | Mostly Clear | 8 to 12 mph SSW | 6% |
| Monday | 91°F | Mostly Sunny | 9 to 14 mph SSW | 6% |
| Monday Night | 73°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 12 mph SSW | 16% |
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 Aug 4, 2026.