Weather World
Friend Lake, IL Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Friend Lake Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  | |  | | | | | |  | | |
| Sunny | Partly Cloudy | Mostly Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Sunny | Chance of Showers | Mostly Sunny | Mostly Clear |
| Hi: 99°FHi: 37°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C | Hi: 95°FHi: 35°C Lo: 65°FLo: 18°C | Hi: 95°FHi: 35°C Lo: 65°FLo: 18°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C | Lo: 61°FLo: 16°C |
| POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 637 AM CDT Sat Sep 05 2026 
Friend Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Friend Lake Weather Map
Friend Lake Quick Facts
Friend Lake Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 554 AM CDT Sat Sep 5 2026
Key Messages
- Dangerous Heat Today: Heat index values will reach to around 105 degrees again today. The Extreme Heat Warning covers all of central Illinois.
- Brief Weekend Relief: A cold front pushing south will bring slightly less hot and humid conditions to northern areas Sunday and Monday, dropping highs into the mid-to-upper 80s. Southern areas will remain warmer, around 90.
- Heat Returns Next Week: The brief break in oppressive heat will be short-lived. Widespread 90-degree temperatures are for...