Brooklyn, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brooklyn, a city in Poweshiek County, Iowa.
Overnight
46°F
Slight Chance Rain Showers
A slight chance of rain showers after 5am. Cloudy. Low around 46, with temperatures rising to around 49 overnight. West southwest wind around 14 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
7-day forecast for Brooklyn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Slight Chance Rain Showers | 14 mph WSW | 17% |
| Wednesday | 52°F | Slight Chance Rain Showers then Cloudy | 14 mph WSW | 20% |
| Wednesday Night | 43°F | Cloudy | 12 mph W | 9% |
| Thursday | 54°F | Chance Rain Showers | 10 mph NW | 47% |
| Thursday Night | 38°F | Mostly Cloudy | 8 mph N | 10% |
| Friday | 50°F | Mostly Sunny | 3 to 8 mph N | 2% |
| Friday Night | 28°F | Partly Cloudy | 2 mph N | 0% |
| Saturday | 52°F | Mostly Sunny | 0 to 3 mph W | 0% |
| Saturday Night | 33°F | Mostly Clear | 3 mph W | 1% |
| Sunday | 58°F | Sunny | 6 mph W | 1% |
| Sunday Night | 35°F | Clear | 3 mph SW | 0% |
| Monday | 64°F | Sunny | 3 to 8 mph SW | 0% |
| Monday Night | 39°F | Clear | 5 mph W | 0% |
| Tuesday | 63°F | Sunny | 3 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Brooklyn (41.732, -92.445). Updated through the day.
Growing snapshot for Brooklyn
Last spring frost
Apr 28
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
5a
More local growing data for Brooklyn: nearby ZIP 52211 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Belle Plaine, Ia (12.5 mi from Brooklyn). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.