Frost Advisory FROST ADVISORY - Poweshiek County

Regional Infrared Satellite Grinnell Weather Webcam
Updated: @ 01-May-2026 5:35am - next update at 12:00am  
Summary / Temperature Wind Rain Outlook
Night time, Dry Night time, Dry
Currently: 39.3°F, Max: 41.8°F, Min: 38.2°F 39.3°F
Colder 1.0°F than last hour.

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Feels like: 39°F

24-hr difference
-1.8°FColder 1.8°F than yesterday at this time.
  Today Yesterday
High: 41.8°F
3:56am
54.7°F
3:59pm
Low: 38.2°F
2:03am
39.1°F
11:28pm
 Calm SW
0
Gust:
0 mph
0 Bft - Calm
Today: 4 mph 4:24am
Gust Month: 4.0 mph May 1
Rain Today: 0 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0 in
Storm Rain: 0 in
This Month: 0 in
Season Total: 11.66 in
3 days since last rain.
Tonight

Tonight: A 10 percent chance of showers before 7pm.  Areas of frost after 3am.  Otherwise, partly cloudy, with a low around 33. North wind 5 to 7 mph becoming calm  in the evening.
Slight Chance
Showers then
Areas Frost
Humidity & Barometer Almanac Moon
Humidity: 75 % Increased 2.0% since last hour.
Dew Point: 32°F Decreased 0.3°F since last hour.
Barometer: 30.075 inHg Falling 0.01  inHg/hr
Baro Trend: Steady
Sunrise: 6:07am
Sunset: 8:09pm
Moonset: 5:41am
Moonrise: 7:39pm
Full Moon
Full Moon, Moon at 14 days in cycle
100%
Illuminated
UV Index Solar Radiation
   0.0    None
High: 0.0 @ 12:00am
0 W/m2 (0 %)
High: 0 @  12:00am
 NWS Weather Forecast  - Outlook: Today & Tonight
Today

Today: A chance of rain and thunderstorms before 4pm, then a chance of showers and thunderstorms, mainly between 4pm and 5pm.  Areas of frost before 8am.  Otherwise, partly sunny, with a high near 56. Calm wind becoming north northwest 5 to 8 mph in the morning.  Chance of precipitation is 30%.
Areas Frost
then Chance
Showers

Hi 56 °F
NWS forecast: A chance of rain and thunderstorms before 4pm, then a chance of showers and thunderstorms, mainly between 4pm and 5pm. Areas of frost before 8am. Otherwise, partly sunny, with a high near 56. Calm wind becoming north northwest 5 to 8 mph in the morning. Chance of precipitation is 30%.
 
Tonight

Tonight: A 10 percent chance of showers before 7pm.  Areas of frost after 3am.  Otherwise, partly cloudy, with a low around 33. North wind 5 to 7 mph becoming calm  in the evening.
Slight Chance
Showers then
Areas Frost

Lo 33 °F
NWS forecast: A 10 percent chance of showers before 7pm. Areas of frost after 3am. Otherwise, partly cloudy, with a low around 33. North wind 5 to 7 mph becoming calm in the evening.