Live Weather & Forecast

Weather in Grinnell

Iowa, United States · Real-time conditions & 3-day outlook

Flag of United States
Partly Cloudy
15°C
Feels like 13°C
59°F / Feels 56°F
Partly Cloudy
Grinnell, Iowa
🌙 Nighttime
Updated: 2026-04-12 22:15
💧
Humidity
86%
💨
Wind
23.8 km/h SSW
🌬️
Wind Gust
37.8 km/h
🌡️
Pressure
1008 mb
👁️
Visibility
16 km
☀️
UV Index
0 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
0%
💦
Dew Point
15.1°C
🌐
Wind Degree
209°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
161.9 μg/m³
NO₂
4.1 μg/m³
O₃
58 μg/m³
SO₂
1.3 μg/m³
PM 2.5
3.5 μg/m³
PM 10
3.6 μg/m³

Weather Alerts 3

Met · Severe · Immediate
Flood Warning issued April 11 at 9:13PM CDT until April 13 at 7:00AM CDT by NWS Quad Cities IA IL

...The Flood Warning continues for the following rivers in Iowa... Cedar River near Conesville affecting Muscatine and Louisa Counties. Iowa River at Wapello affecting Louisa County. Iowa River at Marengo affecting Iowa and Benton Counties. ...The Flood Warning is extended for the following rivers in Iowa... Iowa River at Oakville affecting Louisa County. * WHAT...Minor flooding is occurring...

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. The next statement will be issued by Sunday evening at 915 PM CDT.

Met · Moderate · Expected
Special Weather Statement issued April 12 at 1:25PM CDT by NWS Quad Cities IA IL

Strong south-southwesterly winds will continue this afternoon through the early evening hours, with occasional gusts as high as 45 mph. There are also some developing showers and a few isolated thunderstorms this afternoon that could help generate stronger wind gusts up to 50 mph. If traveling on east-to-west oriented roads, be prepared for gusty crosswinds, especially in high profile vehicles. S...

Met · Severe · Immediate
Flood Warning issued April 12 at 10:26AM CDT until April 13 at 7:00AM CDT by NWS Quad Cities IA IL

...The Flood Warning continues for the following rivers in Iowa... Wapsipinicon River near De Witt 4S affecting Clinton and Scott Counties. Cedar River near Conesville affecting Louisa and Muscatine Counties. Iowa River at Oakville affecting Louisa County. Iowa River at Wapello affecting Louisa County. Iowa River at Marengo affecting Benton and Iowa Counties. * WHAT...Minor flooding is occur...

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Motorists should not attempt to drive around barricades or drive cars through flooded areas. The next statement will be issued by Monday morning at 700 AM CDT.

Today's Hourly Forecast

24-hour breakdown for Grinnell, Iowa

12 AM
Clear
12°
Clear
💧 88% 💨 29.5 km/h
1 AM
Clear
13°
Clear
💧 90% 💨 29.5 km/h
2 AM
Clear
13°
Clear
💧 91% 💨 27.7 km/h
3 AM
Clear
13°
Clear
💧 90% 💨 26.3 km/h
4 AM
Clear
14°
Clear
💧 90% 💨 28.1 km/h
5 AM
Clear
14°
Clear
💧 89% 💨 27.7 km/h
6 AM
Clear
14°
Clear
💧 89% 💨 29.2 km/h
7 AM
Sunny
15°
Sunny
💧 88% 💨 29.2 km/h
8 AM
Sunny
15°
Sunny
💧 88% 💨 30.2 km/h
9 AM
Patchy rain nearby
17°
Patchy rain nearby
💧 89% 💨 30.2 km/h 🌧️ 87%
10 AM
Patchy rain nearby
19°
Patchy rain nearby
💧 87% 💨 30.2 km/h 🌧️ 62%
11 AM
Cloudy
20°
Cloudy
💧 84% 💨 35.3 km/h
12 PM
Partly Cloudy
21°
Partly Cloudy
💧 80% 💨 37.1 km/h
1 PM
Sunny
21°
Sunny
💧 70% 💨 34.2 km/h
2 PM
Patchy light rain
20°
Patchy light rain
💧 87% 💨 22.3 km/h 🌧️ 100%
3 PM
Light rain
19°
Light rain
💧 93% 💨 28.8 km/h 🌧️ 100%
4 PM
Light rain
19°
Light rain
💧 93% 💨 24.5 km/h 🌧️ 100%
5 PM
Light drizzle
19°
Light drizzle
💧 92% 💨 25.9 km/h 🌧️ 100%
6 PM
Patchy light drizzle
18°
Patchy light drizzle
💧 92% 💨 26.3 km/h 🌧️ 100%
7 PM
Patchy rain nearby
17°
Patchy rain nearby
💧 93% 💨 25.6 km/h 🌧️ 100%
8 PM
Patchy rain nearby
17°
Patchy rain nearby
💧 94% 💨 25.2 km/h 🌧️ 80%
9 PM
Partly Cloudy
17°
Partly Cloudy
💧 93% 💨 25.2 km/h
10 PM
Partly Cloudy
15°
Partly Cloudy
💧 86% 💨 23.8 km/h
11 PM
Clear
16°
Clear
💧 93% 💨 21.6 km/h

3-Day Forecast

Daily overview for Grinnell, Iowa

Today
Moderate rain
Moderate rain
23° / 12°
🌧️ 89% chance of rain
💧 Avg. humidity: 89%
💨 Max wind: 37.1 km/h
🌧️ Total precip: 5.16 mm
☀️ UV Index: 0.7
🌅 Sunrise: 06:35 AM
🌇 Sunset: 07:49 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Overcast
Overcast
22° / 15°
🌧️ 0% chance of rain
💧 Avg. humidity: 93%
💨 Max wind: 32 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:34 AM
🌇 Sunset: 07:50 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Patchy rain nearby
Patchy rain nearby
23° / 19°
🌧️ 67% chance of rain
💧 Avg. humidity: 94%
💨 Max wind: 29.2 km/h
🌧️ Total precip: 1.25 mm
☀️ UV Index: 1.1
🌅 Sunrise: 06:32 AM
🌇 Sunset: 07:51 PM
🌙 Waning Crescent
🌑 Moon: 15% lit

Best Time to Visit Grinnell

Plan your trip to Grinnell, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Grinnell 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Grinnell?
Current conditions in Grinnell: Partly Cloudy, temperature 15°C, humidity 86%.
What is the best time to visit Grinnell?
The best time to visit Grinnell is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Grinnell?
Grinnell is located at approximately 41.7° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Grinnell?
The wettest period in Grinnell is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Grinnell?
For visits to Grinnell during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Grinnell in?
Grinnell is located in United States, in the state of Iowa.
What are the public holidays in Grinnell in 2026?
View the 2026 public holidays for Grinnell on our Holidays page.
What are the GPS coordinates used for the weather forecast in Grinnell?
The weather forecast for Grinnell uses coordinates 41.743, -92.724.