Brooklyn, IA Weather & Growing Conditions
Tonight
46°F
Rain Showers Likely
Rain showers likely before 3am. Mostly cloudy. Low around 46, with temperatures rising to around 50 overnight. South southwest wind 7 to 10 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Rain Showers Likely | 7 to 10 mph SSW | 63% |
| Wednesday | 54°F | Chance Rain Showers | 10 to 14 mph W | 31% |
| Wednesday Night | 42°F | Mostly Cloudy then Slight Chance Rain Showers | 12 mph WSW | 19% |
| Thursday | 53°F | Chance Rain Showers | 9 mph WNW | 44% |
| Thursday Night | 38°F | Slight Chance Rain Showers then Mostly Cloudy | 7 mph NNW | 16% |
| Friday | 52°F | Partly Sunny | 3 to 8 mph N | 2% |
| Friday Night | 31°F | Partly Cloudy | 2 mph NNW | 1% |
| Saturday | 55°F | Mostly Sunny | 0 to 3 mph WSW | 1% |
| Saturday Night | 34°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). Updated through the day.
Growing snapshot for Brooklyn, IA
Last spring frost
Apr 28
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
5a
Explore more for Brooklyn, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Belle Plaine, Ia (12.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.