Brighton, IA Weather & Growing Conditions
Today
88°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 4pm. Mostly sunny. High near 88, with temperatures falling to around 86 in the afternoon. West wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph W | 26% |
| Tonight | 66°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 61% |
| Wednesday | 78°F | Showers And Thunderstorms | 5 mph NE | 79% |
| Wednesday Night | 60°F | Showers And Thunderstorms Likely | 5 mph NE | 63% |
| Thursday | 81°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 mph NE | 45% |
| Thursday Night | 61°F | Mostly Clear | 0 mph | 4% |
| Friday | 84°F | Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 mph SE | 15% |
| Saturday | 87°F | Sunny | 5 mph S | 14% |
| Saturday Night | 70°F | Mostly Clear | 5 to 10 mph S | 10% |
| Sunday | 89°F | Sunny | 10 to 15 mph S | 10% |
| Sunday Night | 69°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 10 mph S | 24% |
| Monday | 89°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph S | 24% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 29% |
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 Aug 4, 2026.