Delmar, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Delmar, a city in Clinton County, Iowa.
Today
80°F
Patchy Fog then Chance Showers And Thunderstorms
Patchy fog and occasional showers and thunderstorms before 11am, then a chance of showers and thunderstorms between 11am and 1pm, then a chance of showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 80. South wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Delmar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Patchy Fog then Chance Showers And Thunderstorms | 5 to 10 mph S | 97% |
| Tonight | 62°F | Showers And Thunderstorms | 5 to 10 mph NW | 84% |
| Sunday | 69°F | Rain Showers Likely | 10 mph NE | 63% |
| Sunday Night | 56°F | Chance Rain Showers | 10 mph NE | 36% |
| Monday | 64°F | Chance Rain Showers | 10 mph NE | 51% |
| Monday Night | 50°F | Chance Rain Showers | 5 to 10 mph NE | 42% |
| Tuesday | 63°F | Slight Chance Rain Showers | 5 to 10 mph NE | 23% |
| Tuesday Night | 47°F | Partly Cloudy | 5 mph NE | 5% |
| Wednesday | 67°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 68°F | Mostly Sunny | 5 mph NE | 6% |
| Thursday Night | 53°F | Partly Cloudy | 0 mph | 6% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph NE | 5% |
| Friday Night | 52°F | Partly Cloudy | 0 to 5 mph E | 5% |
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 Sep 19, 2026.