(Atlantic, Iowa) – Weather data for Atlantic during the month of December, 2025 (Compiled here at KJAN – the official National Weather Service reporting site), shows we were about 5-degrees warmer than normal for a high, and 2-degrees warmer for the Low. The average High last month was 38. The average Low was 16.

The warmest day last month was 56 on the 22nd. Our coolest morning was -10 degrees on the 4th.

Snowfall amounted to one-inch. Rain and melted snowfall for the month was just .43″ of an inch, which was 0.68-inches below the normal for December, in Atlantic.

Looking ahead, we find the High temperature for the month of January in Atlantic, is 29 degrees, while the average Low is 9. Precipitation typically amounts to .84-inches. Check back with us during the first week of February, 2026, to see how our actual weather data compared to the historical averages.