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.
This Afternoon
46°F
Rain
Rain. Cloudy, with a high near 46. East wind around 5 mph. Chance of precipitation is 100%.
7-day forecast for Mendeltna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 46°F | Rain | 5 mph E | 100% |
| Tonight | 36°F | Rain | 0 to 5 mph NE | 100% |
| Saturday | 48°F | Chance Light Rain then Chance Rain Showers | 0 to 15 mph S | 52% |
| Saturday Night | 35°F | Chance Rain Showers then Light Rain | 5 to 15 mph E | 75% |
| Sunday | 46°F | Light Rain then Chance Rain Showers | 0 to 5 mph NE | 75% |
| Sunday Night | 34°F | Chance Rain Showers | 0 mph | 54% |
| Monday | 48°F | Chance Rain Showers | 0 to 10 mph S | 54% |
| Monday Night | 29°F | Chance Rain And Snow Showers | 0 to 10 mph S | 32% |
| Tuesday | 46°F | Mostly Cloudy | 0 to 5 mph NW | 8% |
| Tuesday Night | 28°F | Mostly Cloudy | 5 mph NW | 4% |
| Wednesday | 47°F | Mostly Sunny | 0 to 5 mph NE | 4% |
| Wednesday Night | 28°F | Mostly Cloudy | 0 to 5 mph S | 5% |
| Thursday | 48°F | Partly Sunny | 0 to 5 mph SE | 4% |
| Thursday Night | 30°F | Mostly Cloudy | 5 mph S | 12% |
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 Sep 19, 2026.