Delmar, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Delmar, a city in Clinton County, Iowa.
Today
84°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Mostly sunny. High near 84, with temperatures falling to around 81 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast for Delmar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 32% |
| Tonight | 65°F | Showers And Thunderstorms Likely | 5 mph N | 88% |
| Wednesday | 76°F | Showers And Thunderstorms Likely | 0 to 5 mph N | 68% |
| Wednesday Night | 60°F | Chance Showers And Thunderstorms | 0 to 5 mph N | 53% |
| Thursday | 80°F | Chance Rain Showers then Mostly Sunny | 0 mph | 29% |
| Thursday Night | 60°F | Mostly Clear | 0 mph | 4% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 64°F | Mostly Clear | 0 to 5 mph S | 8% |
| Saturday | 85°F | Sunny | 5 mph SW | 11% |
| Saturday Night | 69°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 mph S | 19% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph S | 19% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 5 mph SW | 39% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 mph S | 38% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 5 mph E | 38% |
Forecast source: National Weather Service (api.weather.gov) for Delmar (41.999, -90.608). Updated through the day.
Growing snapshot for Delmar
Last spring frost
Apr 25
First fall frost
Oct 14
Growing season
171 days
Hardiness zone
5a
More local growing data for Delmar: nearby ZIP 52037 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Andover
Calamus
Camanche
Charlotte
Clinton
DeWitt
Goose Lake
Grand Mound
Lost Nation
Low Moor
Toronto
Welton
Wheatland
Climate data from the nearest NOAA station, Maquoketa, Ia (7.8 mi from Delmar). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.