Saint Augustine, IL Weather Forecast
Local 7-day forecast
Rain Showers Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Augustine, IL in one place.
Rain showers likely. Mostly sunny, with a high near 54. Northwest wind 15 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for Saint Augustine, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 15, 2026 9:48 PM CDT.
The active forecast window currently covers Apr 18 to Apr 22, 2026 for Saint Augustine, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 18 to Apr 22, 2026
- Latest sync
- Apr 15, 2026 9:48 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Augustine
Wednesday looks like the warmest upcoming period in Saint Augustine at 74 degrees F.
Saturday Night is the coolest period ahead with temperatures near 34 degrees F.
The strongest winds are forecast for Saturday at about 15 to 18 mph NW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 9:48 PM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KDVN
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of rain showers before 7pm. Mostly clear, with a low around 34. West northwest wind 8 to 15 mph, with gusts as high as 25 mph.
Sunny, with a high near 57.
Mostly clear, with a low around 36.
Sunny, with a high near 68.
Mostly clear, with a low around 50.
Mostly sunny, with a high near 73.
Mostly clear, with a low around 51.
A slight chance of rain showers after 1pm. Mostly sunny, with a high near 74.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 18
|
Rain Showers Likely
|
54°F |
15 to 18 mph
NW
|
|
Saturday Night
Apr 18
|
Slight Chance Rain Showers then Mostly Clear
|
34°F |
8 to 15 mph
WNW
|
|
Sunday
Apr 19
|
Sunny
|
57°F |
8 to 15 mph
WNW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
36°F |
5 to 10 mph
ENE
|
|
Monday
Apr 20
|
Sunny
|
68°F |
5 to 14 mph
SSE
|
|
Monday Night
Apr 20
|
Mostly Clear
|
50°F |
12 mph
SSW
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
73°F |
12 to 16 mph
SW
|
|
Tuesday Night
Apr 21
|
Mostly Clear
|
51°F |
7 to 13 mph
SW
|
|
Wednesday
Apr 22
|
Mostly Sunny then Slight Chance Rain Showers
|
74°F |
7 to 13 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Augustine.