Longtown Weather Forecast
- 38
- 72
Rain Showers
- 45
- 64
Mostly Sunny
- 59
- 74
Mostly Sunny
- 55
- 77
Rain Showers
- 37
- 65
Rain Showers Likely
- 38
- 56
Mostly Sunny
Today 7 Mar Perry
Mostly cloudy. Showers with a chance of Thunderstorms in the Morning, then a chance of Showers with a slight chance of Thunderstorms in the afternoon. Highs in the lower 70s. Temperature falling into the mid 60s in the afternoon. Southwest Winds 15 to 20 Mph, becoming west 10 to 15 Mph in the afternoon. Chance of rain 90 percent.
Tonight 7 Mar Perry
Mostly cloudy in the Evening, then becoming partly cloudy. Much cooler. Less humid with Lows in the upper 30s. Northwest Winds 5 to 10 Mph.
Longtown Temperature Statistics
March Temperature
Southern Illinois Airport (29.8 miles)
Lowest 1 March, 2026
31.6 °FAverage March
49 °FHighest 4 March, 2026
72 °F
Climate (2021–Present)
Southern Illinois Airport (29.8 miles)
Average Low 2021–2026
47.9 °FAverage 2021–2026
58.4 °FAverage High 2021–2026
69 °F