Brighton, IA Weather & Growing Conditions
Tonight
49°F
Mostly Cloudy
Mostly cloudy. Low around 49, with temperatures rising to around 51 overnight. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Cloudy | 10 to 15 mph SW | 12% |
| Wednesday | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 15 to 20 mph W | 19% |
| Wednesday Night | 44°F | Mostly Cloudy | 10 to 15 mph W | 8% |
| Thursday | 54°F | Rain Showers Likely | 10 to 15 mph W | 62% |
| Thursday Night | 41°F | Mostly Cloudy | 10 mph NW | 14% |
| Friday | 49°F | Partly Sunny | 5 to 10 mph N | 2% |
| Friday Night | 30°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 51°F | Mostly Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 34°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 57°F | Sunny | 5 mph W | 2% |
| Sunday Night | 35°F | Mostly Clear | 5 mph W | 0% |
| Monday | 64°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 63°F | Sunny | 5 mph NW | 0% |
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 Nov 4, 2026.