Last updated: June 24, 2025
In December, the average temperature in Seward, United States is a crisp 0°C (32°F). Expect temperatures to vary from a chilly -23°C (-10°F) at their lowest to a pleasant 20°C (69°F) at their peak. With an average humidity of 83%, the air can feel quite damp. Additionally, anticipate 41 mm (1.6 in) of precipitation over approximately 4 days, making it a time for cozy layers and rainy day activities.
In December in Seward, the average temperature is 0°C (32°F), with maximums reaching 20°C (69°F) and minimums dropping as low as -23°C (-10°F). It’s important to pack appropriately for fluctuating temperatures if you plan to travel during this time.
In Seward in December, the precipitation amount is 41 mm (1.6 in) over the course of 4 days.
In Seward in December, humidity is 83%. With an average temperature of 0°C (32°F), this humidity feels like traveling through a thick mist, making every step heavy and the cold pierce even deeper, causing you to constantly seek shelter or warm beverages to counteract the damp chill.
In Seward in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Seward, you can visit Hourly UV Index in Seward.
UV Risk Categories
Weather in Seward varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Seward, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (26°F) | 32 mm (1.3 inches) | 76% | moderate |
| February Weather | -3°C (26°F) | 26 mm (1.0 inches) | 80% | moderate |
| March Weather | 5°C (42°F) | 95 mm (3.8 inches) | 73% | high |
| April Weather | 10°C (51°F) | 49 mm (1.9 inches) | 74% | very high |
| May Weather | 17°C (63°F) | 144 mm (5.7 inches) | 78% | very high |
| June Weather | 25°C (77°F) | 108 mm (4.2 inches) | 82% | very high |
| July Weather | 26°C (79°F) | 69 mm (2.7 inches) | 83% | very high |
| August Weather | 24°C (75°F) | 91 mm (3.6 inches) | 80% | very high |
| September Weather | 21°C (70°F) | 73 mm (2.9 inches) | 75% | very high |
| October Weather | 11°C (53°F) | 110 mm (4.3 inches) | 75% | high |
| November Weather | 5°C (41°F) | 27 mm (1.1 inches) | 82% | moderate |
| December Weather | 0°C (32°F) | 41 mm (1.6 inches) | 83% | low |