Royal City, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Royal City, a city in Grant County, Washington.
Overnight
52°F
Mostly Clear
Mostly clear. Low around 52, with temperatures rising to around 54 overnight. Northwest wind around 1 mph.
7-day forecast for Royal City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Mostly Clear | 1 mph NW | 0% |
| Saturday | 78°F | Sunny | 2 mph E | 0% |
| Saturday Night | 52°F | Mostly Clear | 2 mph SE | 0% |
| Sunday | 80°F | Sunny | 1 mph N | 0% |
| Sunday Night | 52°F | Mostly Clear | 1 mph W | 0% |
| Monday | 81°F | Sunny | 2 mph W | 0% |
| Monday Night | 53°F | Partly Cloudy | 3 mph W | 0% |
| Tuesday | 77°F | Mostly Sunny | 2 mph W | 0% |
| Tuesday Night | 51°F | Partly Cloudy | 3 mph W | 0% |
| Wednesday | 73°F | Mostly Sunny | 3 mph W | 1% |
| Wednesday Night | 50°F | Mostly Cloudy | 3 mph W | 1% |
| Thursday | 71°F | Mostly Sunny | 2 mph NW | 3% |
| Thursday Night | 50°F | Mostly Cloudy | 2 mph NW | 6% |
| Friday | 68°F | Mostly Sunny | 5 mph W | 6% |
Forecast source: National Weather Service (api.weather.gov) for Royal City (46.902, -119.621). Updated through the day.
Growing snapshot for Royal City
Last spring frost
Apr 23
First fall frost
Oct 12
Growing season
172 days
Hardiness zone
7a
More local growing data for Royal City: nearby ZIP 99357 weather · frost dates · planting calendar · Washington frost dates
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Moses Lake
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Warden
Wheeler
Wilson Creek
Climate data from the nearest NOAA station, Smyrna, Wa (3.8 mi from Royal City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.