Brighton, IA Weather & Growing Conditions
Tonight
69°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 1am and 4am, then a chance of showers and thunderstorms. Mostly cloudy. Low around 69, with temperatures rising to around 71 overnight. Southeast wind 5 to 10 mph. Chance of precipitation is 50%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 69°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 to 10 mph SE | 45% |
| Saturday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 49% |
| Saturday Night | 64°F | Showers And Thunderstorms | 5 mph NW | 77% |
| Sunday | 71°F | Showers And Thunderstorms Likely | 5 to 15 mph NE | 73% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 66% |
| Monday | 63°F | Rain Showers Likely | 15 mph NE | 60% |
| Monday Night | 53°F | Rain Showers Likely | 10 to 15 mph NE | 60% |
| Tuesday | 61°F | Chance Rain Showers | 10 mph NE | 39% |
| Tuesday Night | 48°F | Mostly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 65°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 68°F | Partly Sunny | 5 mph NE | 9% |
| Thursday Night | 54°F | Mostly Cloudy | 0 to 5 mph NE | 8% |
| Friday | 70°F | Mostly Sunny | 5 mph NE | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Brighton, IA
Last spring frost
Apr 28
First fall frost
Oct 11
Growing season
165 days
Hardiness zone
5b
Explore more for Brighton, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Washington, Ia (10.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.