Brooklyn, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brooklyn, a city in Poweshiek County, Iowa.
Tonight
67°F
Patchy Fog
A slight chance of showers and thunderstorms before 11pm, then patchy fog and a slight chance of showers and thunderstorms between 11pm and midnight, then patchy fog and a chance of showers and thunderstorms between midnight and 5am, then patchy fog and showers and thunderstorms likely. Mostly cloudy, with a low around 67. Southeast wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Brooklyn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 67°F | Patchy Fog | 7 to 10 mph SE | 56% |
| Saturday | 82°F | Patchy Fog | 8 mph SSW | 55% |
| Saturday Night | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 8 mph NNW | 56% |
| Sunday | 67°F | Showers And Thunderstorms Likely | 8 to 12 mph NNE | 66% |
| Sunday Night | 55°F | Showers And Thunderstorms Likely | 12 mph ENE | 66% |
| Monday | 61°F | Rain Showers Likely | 13 mph ENE | 60% |
| Monday Night | 50°F | Rain Showers Likely | 7 to 12 mph NE | 60% |
| Tuesday | 60°F | Slight Chance Rain Showers then Mostly Cloudy | 9 mph NE | 22% |
| Tuesday Night | 46°F | Partly Cloudy | 3 to 7 mph NE | 5% |
| Wednesday | 64°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 50°F | Partly Cloudy | 2 mph ENE | 3% |
| Thursday | 67°F | Partly Sunny | 3 mph E | 11% |
| Thursday Night | 53°F | Partly Cloudy | 1 mph E | 9% |
| Friday | 67°F | Mostly Sunny | 1 to 5 mph E | 7% |
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 Sep 19, 2026.