Halfmoon Lake

St. Clair County, IL

GOConfidence · Low
Best bite window
The highlighted window has passed. This read is still based on the latest cached weather; use the 7-Day forecast below for the next window.
Main reason
dry conditions across the window

GO on Halfmoon Lake — light winds and rising pressure after a passing system for this window. Weather-only read (no on-water history calibrating this yet).

Next forecast window
GO

Fri · Sep 11, Now → 8 AM (America/Chicago)

Full read

The latest cached fishing-weather read for Halfmoon Lake in St. Clair County, IL is GO. Its highlighted window has passed, so use the 7-day forecast below for the next available window. The main factor in its favor was dry conditions across the window. Its cached forecast evidence included wind near 3 mph out of the northeast, gusting to 7 mph; surface pressure near 999 hPa on a rising trend; 0.00 inches of rain; and air temperature near 75 °F with overcast dominant. Confidence in this cached read is low; it was generated September 10, 2026, 1:22 PM UTC, and reads refresh on a daily cadence. This is a weather-only read built from forecast weather; it does not yet use on-water reports, and confidence is capped until local water data or feedback exists.

UPDATED September 10, 2026, 1:22 PM UTCBUCKET 2026-09-10ENGINE 0.7.0

Conditions at a glance

Wind
3mph

NE · gust 7

Rain / Weather
0in

Overcast

Temp
75°F

24°C · hum 86%

Pressure
29.50inHg

Rising

7-Day Fishing Forecast

One read per day — the bite call, the window, the weather behind it

  1. Thu · Sep 10
    Window passed
    GO
    Dry conditions across the window
    79° / 70°F
    3 mph · NEgust 22
    0.00 in
    ↓ -1.6 hPa
  2. Fri · Sep 11
    Now → 8 AM
    GO
    Dry conditions across the window
    82° / 68°F
    4 mph · NEgust 17
    0.02 in
    ↓ -1.7 hPa
  3. Sat · Sep 12
    4 AM → 8 AM
    GO
    Dry conditions across the window
    95° / 68°F
    6 mph · SWgust 18
    0.00 in
    → +1.1 hPa
  4. Sun · Sep 13
    4 AM → 8 AM
    GO
    Dry conditions across the window
    100° / 72°F
    5 mph · Sgust 10
    0.00 in
    ↓ +0.3 hPa
  5. Mon · Sep 14
    4 AM → 8 AM
    GO
    Dry conditions across the window
    104° / 75°F
    5 mph · Sgust 25
    0.00 in
    ↓ -1.3 hPa
  6. Tue · Sep 15
    6 PM → 10 PM
    GO
    Dry conditions across the window
    100° / 73°F
    7 mph · Wgust 28
    0.06 in
    ↑ +6.0 hPa
  7. Wed · Sep 16
    10 AM → 2 PM
    GO
    Dry conditions across the window
    99° / 70°F
    4 mph · SWgust 19
    0.62 in
    ↓ -0.6 hPa

Last 3 days

Recent context — what just happened

Pressure
Steady
+0.9 hPa over 72h
Rain
Light rain
0.17 in totallast 72h
Wind
Calm wind
4 mph · gust 17 · SE
Temperature
Warmer
+6.8°F over 72h93–59°F range

Weather-only read. Confidence is capped until local water data or feedback exists.

Nearby waters

Weather data by Open-Meteo — CC BY 4.0. Fishing Weather derives the fishing read.