Mendeltna, AK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mendeltna, a community in Copper River Census Area County, Alaska.
Overnight
47°F
Chance Light Rain
A chance of rain. Cloudy, with a low around 47. Southeast wind around 5 mph. Chance of precipitation is 30%.
7-day forecast for Mendeltna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Chance Light Rain | 5 mph SE | 32% |
| Tuesday | 63°F | Slight Chance Light Rain then Partly Sunny | 5 to 15 mph SE | 21% |
| Tuesday Night | 44°F | Partly Cloudy | 0 to 15 mph S | 8% |
| Wednesday | 66°F | Mostly Sunny | 0 to 5 mph S | 8% |
| Wednesday Night | 46°F | Mostly Cloudy | 0 to 5 mph S | 10% |
| Thursday | 66°F | Mostly Sunny | 0 to 5 mph S | 10% |
| Thursday Night | 48°F | Mostly Cloudy | 0 to 5 mph SW | 12% |
| Friday | 67°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph NW | 17% |
| Friday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph NW | 17% |
| Saturday | 67°F | Slight Chance Rain Showers | 5 mph NW | 21% |
| Saturday Night | 49°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph NW | 21% |
| Sunday | 68°F | Partly Sunny then Chance Rain Showers | 5 mph N | 25% |
| Sunday Night | 49°F | Chance Rain Showers then Mostly Cloudy | 5 mph N | 25% |
| Monday | 68°F | Chance Rain Showers | 0 to 5 mph N | 26% |
Forecast source: National Weather Service (api.weather.gov) for Mendeltna (62.146, -146.758). Updated through the day.
Growing snapshot for Mendeltna
Last spring frost
May 30
First fall frost
Sep 4
Growing season
95 days
More local growing data for Mendeltna: nearby ZIP 99588 weather · frost dates · planting calendar · Alaska frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Lake Susitna, Ak (17.7 mi from Mendeltna). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.