American Fork, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for American Fork, a city in Utah County, Utah.
Today
55°F
Mostly Sunny
Mostly sunny. High near 55, with temperatures falling to around 50 in the afternoon. South wind around 3 mph.
7-day forecast for American Fork
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 55°F | Mostly Sunny | 3 mph S | 0% |
| Tonight | 38°F | Mostly Cloudy then Chance Light Rain | 3 mph ENE | 42% |
| Wednesday | 48°F | Light Rain Likely | 3 mph WNW | 55% |
| Wednesday Night | 35°F | Partly Cloudy | 2 mph ENE | 6% |
| Thursday | 52°F | Partly Sunny | 2 mph SSW | 3% |
| Thursday Night | 35°F | Mostly Cloudy | 2 mph NNW | 4% |
| Friday | 53°F | Mostly Sunny | 0 to 3 mph NNW | 2% |
| Friday Night | 35°F | Partly Cloudy | 2 mph NNE | 1% |
| Saturday | 56°F | Sunny | 2 mph ENE | 0% |
| Saturday Night | 37°F | Mostly Clear | 2 mph E | 0% |
| Sunday | 62°F | Sunny | 2 mph SE | 0% |
| Sunday Night | 42°F | Partly Cloudy | 0 to 3 mph E | 0% |
| Monday | 64°F | Mostly Sunny | 3 mph SSE | 1% |
| Monday Night | 43°F | Mostly Cloudy | 3 mph SE | 2% |
Forecast source: National Weather Service (api.weather.gov) for American Fork (40.378, -111.795). Updated through the day.
Growing snapshot for American Fork
Last spring frost
Apr 17
First fall frost
Oct 25
Growing season
188 days
Hardiness zone
7a
More local growing data for American Fork: nearby ZIP 84042 weather · frost dates · planting calendar · Utah frost dates
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Climate data from the nearest NOAA station, Pleasant Grove, Ut (1.9 mi from American Fork). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.