Brooklyn, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brooklyn, a city in Poweshiek County, Iowa.
Tonight
46°F
Cloudy then Slight Chance Rain Showers
A slight chance of rain showers between 1am and 3am. Cloudy. Low around 46, with temperatures rising to around 50 overnight. South southwest wind 7 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Brooklyn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Cloudy then Slight Chance Rain Showers | 7 to 10 mph SSW | 18% |
| Wednesday | 54°F | Chance Rain Showers | 14 mph W | 30% |
| Wednesday Night | 42°F | Mostly Cloudy then Slight Chance Rain Showers | 12 mph WSW | 18% |
| Thursday | 53°F | Chance Rain Showers | 10 mph WNW | 44% |
| Thursday Night | 39°F | Slight Chance Rain Showers then Mostly Cloudy | 8 mph NNW | 16% |
| Friday | 51°F | Partly Sunny | 3 to 8 mph N | 2% |
| Friday Night | 32°F | Partly Cloudy | 2 mph NNW | 1% |
| Saturday | 55°F | Mostly Sunny | 0 to 3 mph WSW | 1% |
| Saturday Night | 35°F | Mostly Clear | 3 mph W | 4% |
| Sunday | 60°F | Sunny | 6 mph W | 5% |
| Sunday Night | 36°F | Mostly Clear | 5 mph WSW | 2% |
| Monday | 64°F | Sunny | 5 to 9 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 6 mph WNW | 0% |
| Tuesday | 63°F | Sunny | 5 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.