Grundy County, Iowa, United States

Last updated: 3:14 AM CDT  ·  Refresh
12°C
Feels like 10°
Mostly Cloudy
▲ 23°  /  ▼ 14°
Wind
4 mph E
Humidity
85%
Dew Point
10°
Pressure
29.10 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
62%
Sunrise
6:50 AM
Sunset
7:22 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Grundy County is currently mostly cloudy at 12°C. Precipitation is likely — peak probability 90% around 7 PM. Sunrise: 6:50AM · Sunset: 7:22PM.

Alerts

No active alerts for this location.
29 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
12°
7%
4 AM
12°
34%
5 AM
11°
34%
6 AM
12°
34%
7 AM
12°
46%
8 AM
13°
50%
9 AM
13°
64%
10 AM
13°
68%
11 AM
13°
68%
12 PM
14°
63%
1 PM
16°
63%
2 PM
17°
64%
3 PM
19°
55%
4 PM
21°
69%
5 PM
22°
85%
6 PM
22°
78%
7 PM
22°
90%
8 PM
22°
90%
9 PM
20°
90%
10 PM
19°
90%
11 PM
19°
90%
12 AM
19°
90%
1 AM
19°
90%
2 AM
18°
90%
7-Day Forecast
Today
23° 14°
Mostly Cloudy with a 90% chance of rain.
Tue
23° 14°
Drizzle, 90% chance.
Wed
23° 11°
Partly Cloudy with a 72% chance of rain.
Thu
24° 16°
Overcast with a 76% chance of rain.
Fri
30° 17°
Rain, 90% chance.
Sat
26° 16°
Rain, 70% chance.
Sun
22° 15°
Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 12° Mostly Cloudy 7% 4 mph E 85%
4 AM 12° Mostly Cloudy 34% 6 mph E 82%
5 AM 11° Mostly Cloudy 34% 8 mph ESE 79%
6 AM 12° Overcast 34% 10 mph ESE 76%
7 AM 12° Overcast 46% 12 mph ESE 74%
8 AM 13° Overcast 50% 13 mph SE 73%
9 AM 13° Overcast 64% 14 mph SE 72%
10 AM 13° Overcast 68% 15 mph SE 74%
11 AM 13° Overcast 68% 17 mph SE 79%
12 PM 14° Overcast 63% 18 mph SE 82%
1 PM 16° Rain 63% 18 mph SE 83%
2 PM 17° Overcast 64% 20 mph SE 79%
3 PM 19° Mostly Cloudy 55% 20 mph SE 74%
4 PM 21° Mostly Cloudy 69% 21 mph SSE 71%
5 PM 22° Mostly Cloudy 85% 19 mph SSE 70%
6 PM 22° Partly Cloudy 78% 16 mph SSE 70%
7 PM 22° Partly Cloudy 90% 16 mph SE 71%
8 PM 22° Mostly Cloudy 90% 14 mph SSE 77%
9 PM 20° Heavy Rain 90% 13 mph SSE 83%
10 PM 19° Heavy Rain 90% 12 mph SSE 88%
11 PM 19° Heavy Rain 90% 11 mph SSE 91%
12 AM 19° Heavy Rain 90% 12 mph SSE 93%
1 AM 19° Heavy Rain 90% 12 mph SSE 95%
2 AM 18° Heavy Rain 90% 11 mph SSE 95%
15-Day Forecast
Today
9/14
Mostly Cloudy
90%
14°
23°
Tue
9/15
Drizzle
90%
14°
23°
Wed
9/16
Partly Cloudy
72%
11°
23°
Thu
9/17
Overcast
76%
16°
24°
Fri
9/18
Rain
90%
17°
30°
Sat
9/19
Rain
70%
16°
26°
Sun
9/20
Rain
82%
15°
22°
Mon
9/21
Clear
41%
13°
22°
Tue
9/22
Drizzle
44%
12°
21°
Wed
9/23
Clear
19%
11°
22°
Thu
9/24
Drizzle
60%
12°
23°
Fri
9/25
Drizzle
60%
12°
23°
Sat
9/26
Drizzle
60%
13°
23°
Sun
9/27
Drizzle
60%
13°
23°
Mon
9/28
Drizzle
60%
12°
22°
29
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
29 AQI 5.3 µg/m³
O3
Ground-level ozone
Dominant
29 AQI 32 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 29 Good 29 29
Tue 31 Good 31 20
Wed 25 Good 25 19
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Mon Sep 14, 07:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 90 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE13 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index15.7
Kinematics
0–6 km Shear42 kt
0–1 km Shear11 kt
Eff. Shear—
0–1 km SRH61
0–3 km SRH248
Eff. SRH—
Storm Motion326° @ 20 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index15.5
Thermo & Levels
PWAT0.99 in
0–3 km LR1.7 °C/km
700–500 LR5.6 °C/km
Total Totals25.9
LCL960 hPa
LFC—
EL—
Freezing Lvl13,740 ft