Anna Weather Forecast
- 35
- 46
Increasing Clouds
- 24
- 46
Slight Chance Rain/Snow
- 24
- 36
Mostly Sunny
- 39
- 45
Mostly Cloudy
- 29
- 49
Mostly Cloudy
- 26
- 41
Slight Chance Rain Showers
Today 6 Dec Union
Sunny. Highs in the mid 40s. South Winds around 5 Mph.
Tonight 6 Dec Union
Mostly cloudy. Near steady temperature in the mid 30s. South Winds around 5 Mph.
Anna Temperature Statistics
December Temperature
Southern Illinois Airport (21.7 miles)
Lowest 4 December, 2025
19.9 °FAverage December
27.7 °FHighest 3 December, 2025
35.1 °F
Climate (2020–Present)
Southern Illinois Airport (21.7 miles)
Average Low 2020–2025
47.9 °FAverage 2020–2025
58.2 °FAverage High 2020–2025
68.8 °F