Weather World
Arrow, IL Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Arrow Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  |  |  |  |  |  |  |  | | | |
| Mostly Cloudy | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Clearing | Clear | Mostly Sunny | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers |
| Hi: 85°FHi: 29°C | Lo: 70°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C |
| POP: 70% | POP: 80% | POP: 20% | POP: 30% | POP: 30% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 856 AM CDT Tue Sep 08 2026 
Arrow Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Arrow Weather Map
Arrow Quick Facts
Arrow Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 633 AM CDT Tue Sep 8 2026
Key Messages
- Showers and some thunderstorms are expected later tonight into Wednesday.
- Temperatures will remain near to above average through the upcoming weekend, warmest today and then again over the weekend.
Discussion
... Issued at 220 AM CDT Tue Sep 8 2026
The upper ridge that has been responsible for our near record warm first week of September is poised to be suppressed southward a bit mid week as a pair of shortwave troughs pass by to our north. These two shortwaves show up nicely on water v...