Brighton, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brighton, a city in Jefferson County, Iowa.
Today
87°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 87. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast for Brighton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 27% |
| Tonight | 66°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 62% |
| Wednesday | 78°F | Showers And Thunderstorms | 5 mph NE | 79% |
| Wednesday Night | 61°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 62% |
| Thursday | 81°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 mph NE | 44% |
| Thursday Night | 61°F | Mostly Clear | 0 to 5 mph NE | 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 | 13% |
| Saturday Night | 70°F | Mostly Clear | 10 mph S | 10% |
| Sunday | 89°F | Sunny | 10 to 15 mph S | 10% |
| Sunday Night | 69°F | Partly Cloudy then Chance Showers And Thunderstorms | 10 mph S | 25% |
| Monday | 89°F | Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph S | 25% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 30% |
Forecast source: National Weather Service (api.weather.gov) for Brighton (41.175, -91.821). Updated through the day.
Growing snapshot for Brighton
Last spring frost
Apr 28
First fall frost
Oct 11
Growing season
165 days
Hardiness zone
5b
More local growing data for Brighton: nearby ZIP 52540 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Washington, Ia (10.6 mi from Brighton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.