American Fork, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for American Fork, a city in Utah County, Utah.
Tonight
51°F
Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms. Mostly cloudy. Low around 51, with temperatures rising to around 53 overnight. North northwest wind 1 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for American Fork
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 1 to 5 mph NNW | 77% |
| Saturday | 72°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 1 to 7 mph NNW | 15% |
| Saturday Night | 49°F | Mostly Clear | 1 to 7 mph NNE | 0% |
| Sunday | 74°F | Sunny | 3 mph SSW | 0% |
| Sunday Night | 51°F | Partly Cloudy | 3 mph NE | 0% |
| Monday | 80°F | Mostly Sunny | 2 mph SSE | 0% |
| Monday Night | 57°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 3 mph NE | 10% |
| Tuesday | 78°F | Chance Showers And Thunderstorms | 3 mph SSE | 34% |
| Tuesday Night | 54°F | Chance Showers And Thunderstorms | 3 mph SE | 25% |
| Wednesday | 79°F | Sunny then Slight Chance Showers And Thunderstorms | 3 mph S | 10% |
| Wednesday Night | 55°F | Mostly Clear | 3 mph ENE | 3% |
| Thursday | 83°F | Mostly Sunny | 3 mph SE | 5% |
| Thursday Night | 58°F | Partly Cloudy | 1 to 5 mph ESE | 7% |
| Friday | 83°F | Mostly Sunny | 5 mph SSE | 8% |
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 Sep 19, 2026.