St George Weather Forecast
- 40
- 63
Mostly Sunny
- 42
- 63
Increasing Clouds
- 43
- 64
Mostly Cloudy
- 40
- 66
Mostly Cloudy
- 48
- 66
Chance Rain
- 49
- 59
Rain
- 46
- 61
Rain Likely
Today 19 Dec Lower Washington County
Sunny. Highs in the lower 60s.
Tonight 19 Dec Lower Washington County
Mostly clear. Lows around 40.
St George Temperature Statistics
December Temperature
St George Municipal Airport (5 miles)
Lowest 5 December, 2025
28.9 °FAverage December
44.7 °FHighest 11 December, 2025
64 °F
Climate (2020–Present)
St George Municipal Airport (5 miles)
Average Low 2020–2025
52.5 °FAverage 2020–2025
64.4 °FAverage High 2020–2025
76.4 °F