Heat Advisory HEAT ADVISORY - Poweshiek County

Regional Infrared Satellite Grinnell Weather Webcam
Updated: @ 31-Aug-2026 11:40pm - next update at 12:00am  
Summary / Temperature Wind Rain Outlook
Night time, Humid Night time, Humid
Currently: 78.5°F, Max: 89.1°F, Min: 73.3°F 78.5°F
Colder 1.1°F than last hour.

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Feels like: 81.4°F

24-hr difference
1.3°FWarmer 1.3°F than yesterday at this time.
  Today Yesterday
High: 89.1°F
4:27pm
82.6°F
3:48pm
Low: 73.3°F
6:40am
71.3°F
3:58am
 Calm SSW
0
Gust:
0 mph
0 Bft - Calm
Today: 16.1 mph 9:39am
Gust Month: 38.0 mph August 13
Rain Today: 0 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0 in
Storm Rain: 0 in
This Month: 4.93 in
Season Total: 30.66 in
15 rain days in August.
Tuesday

Tuesday: Mostly sunny, with a high near 94. Calm wind becoming south southwest around 5 mph in the afternoon.
Mostly Sunny

Humidity & Barometer Almanac Moon
Humidity: 87 % Increased 3.0% since last hour.
Dew Point: 74.3°F Decreased 0.1°F since last hour.
Barometer: 29.922 inHg Rising 0.01  inHg/hr
Baro Trend: Steady
Sunrise: 6:37am
Sunset: 7:46pm
Moonset: 11:33am
Moonrise: 9:15pm
Waning Gibbous
Waning Gibbous, Moon at 18 days in cycle
83%
Illuminated
UV Index Solar Radiation
   0.0    None
High: 6.7 @ 1:15pm
0 W/m2 (0 %)
High: 1016 @  2:22pm
 NWS Weather Forecast  - Outlook: Tonight & Tuesday
Tonight

Tonight: A slight chance of showers and thunderstorms between midnight and 2am.  Partly cloudy, with a low around 72. South southwest wind 3 to 5 mph.  Chance of precipitation is 20%.
Slight Chance
T-storms


Lo 72 °F
NWS forecast: A slight chance of showers and thunderstorms between midnight and 2am. Partly cloudy, with a low around 72. South southwest wind 3 to 5 mph. Chance of precipitation is 20%.
 
Tuesday

Tuesday: Mostly sunny, with a high near 94. Calm wind becoming south southwest around 5 mph in the afternoon.
Mostly Sunny


Hi 94 °F
NWS forecast: Mostly sunny, with a high near 94. Calm wind becoming south southwest around 5 mph in the afternoon.