New York, NY 66° Los Angeles, CA 68° Chicago, IL 59° Houston, TX 78° 🌤️ Miami, FL Phoenix, AZ 85° 🌤️ Seattle, WA 🌤️ Denver, CO Toronto, ON 54° Vancouver, BC 59°
WeatherLive › Illinois › Port Byron

Port Byron, IL Weather (61275)

Today Hourly 10-Day Weekend Monthly Radar Air Quality Climate
Current WeatherPort Byron · 4:46 AM CDT
83° | 55°
56°F
Feels like 56°
Sunny
WindNW 2 mph · Gusts 7 mph
Precip9% · –
Humidity88% · Dew point 53°
UV index8 Very high
Air Quality29 Good
Pressure30.03 inHg
Visibility6 mi
Sunrise / Sunset6:19 AM · 7:48 PM · 13h 29m

Weather map — Port Byron

Full radar →
Now
56°
13%
2 mph
05:00
56°
12%
1 mph
06:00
55°
13%
3 mph
07:00
55°
14%
3 mph
08:00
59°
14%
2 mph
09:00
65°
9%
3 mph
10:00
70°
6%
2 mph
11:00
74°
4%
4 mph
12:00
78°
2%
2 mph
13:00
83°
2%
1 mph
14:00
83°
1%
1 mph
15:00
80°
10%
4 mph
16:00
75°
10%
4 mph
17:00
74°
12%
2 mph
18:00
73°
15%
3 mph
19:00
71°
18%
2 mph
20:00
70°
17%
2 mph
21:00
69°
7%
4 mph
22:00
64°
27%
5 mph
23:00
66°
22%
5 mph
00:00
66°
19%
5 mph
01:00
65°
10%
5 mph
02:00
63°
13%
5 mph
03:00
62°
18%
5 mph

Today · Mon 8/24

High 83°
9% / –

Sunny. Winds SE at 5 mph.

Overnight · Mon 8/24

Low 55°
— / –

Sunny.

Tomorrow · Tue 8/25

78° | 61°
15% / –

Mostly cloudy. Winds S at 9 mph.

7-day trend

Port Byron · temperature + precipitation

10-day forecast

Updated 4:46 AM

Details & indices

Wind
2 mph NW
Gusts 7 mph
Humidity
88%
Dew point 53°
Pressure
30.03 inHg
Rising
UV index
8 — Very high
High today
Air Quality
Good
AQI 29 · US EPA
Allergy
None detected
—
Visibility
6 mi
Clear view
Allergy — Port Byron

🌿 Conditions right now

View all →
Birch
None
Grass
None
Oak
None
Alder
None
Hazel
None
Mugwort
None
Ragweed
None

Sun & moon

Sunrise6:19 AM
Sunset7:48 PM
Length of day13h 29m
Moonrise6:13 PM
Moonset2:24 AM
Moon phase🌔 Waxing Gibbous · 87%
Next full moonAug 27 Sturgeon Moon
Latitude41.6064°N
Longitude-90.3354°E

Water temps nearby

View all →
No beaches within 50 miles
🌤️No rain expected in the next 90 minutes
Now+30+60+90 min
Minute-by-minute precip · HRRR nowcast

Daily planner

computed from today's forecast
Laundry day
Great
Line-drying weather
Grilling
Great
Fire up the grill
Running
Fair
Lace up outside
Patio
Great
Dinner outdoors
Nearby places in {{REGION}}
Chicago
Sunny
59° 🌤️
Aurora
—
— 🌤️
Rockford
—
— 🌤️
Joliet
—
— 🌤️
Naperville
—
—
Data sources · Monday, August 24
Where the Port Byron forecast comes from
This page blends NOAA/NWS model guidance with global ensembles for the 10-day outlook, air quality and alerts. Data refreshes every hour, current conditions every 15 minutes. Coordinates: 41.6064°N, -90.3354°.
NBM + global weather models
Updated: 4:46 AM
ZIP codes in Port Byron
📮
61242
Port Byron
 📮
61257
Port Byron
 📮
61275
Port Byron
 📮
61278
Le Claire
Weather in Port Byron
Over the next 10 days Port Byron tops out around 85° (Wednesday) and dips to 55° on the coolest night (Monday). Models drop roughly 2.9 in of precipitation across the stretch — watch Saturday (93%). Expect a blustery spell — gusts near 31 mph on Saturday. The NWS alert board for this area is currently clear. Right now Port Byron is about 17° cooler than nearby Des Moines. Longer view: variable mid-latitude weather in every season.
Port Byron, IL · Elev 604 ft · 41.61°N, 90.34°W · Illinois · Forecast computed for these exact coordinates
Powered by NWS/NOAA guidance, multi-model forecasts and official environmental feeds · NOAA/NWS · EPA AirNow · MET Norway · global models
Updated: 4:46 AM