Jamaica, IA Weather & Growing Conditions
Overnight
43°F
Slight Chance Rain Showers
A slight chance of rain showers. Cloudy. Low around 43, with temperatures rising to around 45 overnight. West northwest wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 43°F | Slight Chance Rain Showers | 14 mph WNW | 24% |
| Wednesday | 50°F | Slight Chance Rain Showers then Cloudy | 15 mph W | 24% |
| Wednesday Night | 42°F | Cloudy then Chance Rain Showers | 12 mph WNW | 29% |
| Thursday | 52°F | Chance Rain Showers then Mostly Cloudy | 12 mph NW | 25% |
| Thursday Night | 37°F | Mostly Cloudy | 5 to 8 mph N | 4% |
| Friday | 50°F | Mostly Sunny | 2 to 6 mph N | 1% |
| Friday Night | 29°F | Partly Cloudy | 1 mph N | 0% |
| Saturday | 53°F | Mostly Sunny | 3 mph SSW | 0% |
| Saturday Night | 35°F | Mostly Clear | 3 mph WSW | 0% |
| Sunday | 59°F | Sunny | 5 mph W | 0% |
| Sunday Night | 37°F | Clear | 5 mph SW | 0% |
| Monday | 65°F | Sunny | 5 to 8 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 64°F | Mostly Sunny | 3 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Jamaica, IA
Last spring frost
Apr 25
First fall frost
Oct 10
Growing season
166 days
Hardiness zone
5a
Explore more for Jamaica, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Perry, Ia (9.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.