Last updated: June 24, 2025
In December, the average temperature in Happy, United States hovers around 6°C (42°F). While you might experience a brisk minimum of -11°C (13°F), it can rise to a pleasant maximum of 25°C (77°F). Expect approximately 16 mm (0.6 in) of precipitation over just 1 day, with the air holding a humidity level of 81%.
In December in Happy, the average temperature is 6°C (42°F), with maximums reaching 25°C (77°F) and minimums dipping as low as -11°C (13°F). It's essential to pack layers for your trip, as the temperature can vary significantly throughout the day.
In Happy in December, the precipitation amount is 16 mm (0.6 in) over the course of 1 day.
In Happy in December humidity is 81%. With an average temperature of 6°C (42°F), this humidity feels like a chilly, damp embrace that can make outdoor activities uncomfortable and somewhat drizzling, leaving travelers yearning for warmer, dryer conditions.
In Happy in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Happy for better planning.
UV Risk Categories
Weather in Happy varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Happy, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (39°F) | 18 mm (0.7 inches) | 75% | moderate |
| February Weather | 5°C (41°F) | 12 mm (0.5 inches) | 76% | high |
| March Weather | 11°C (52°F) | 39 mm (1.5 inches) | 64% | very high |
| April Weather | 14°C (58°F) | 28 mm (1.1 inches) | 70% | extreme |
| May Weather | 20°C (68°F) | 66 mm (2.6 inches) | 78% | extreme |
| June Weather | 25°C (77°F) | 38 mm (1.5 inches) | 81% | extreme |
| July Weather | 27°C (80°F) | 33 mm (1.3 inches) | 82% | extreme |
| August Weather | 26°C (79°F) | 52 mm (2.1 inches) | 78% | extreme |
| September Weather | 22°C (72°F) | 43 mm (1.7 inches) | 72% | very high |
| October Weather | 15°C (59°F) | 57 mm (2.2 inches) | 73% | very high |
| November Weather | 9°C (49°F) | 13 mm (0.5 inches) | 80% | high |
| December Weather | 6°C (42°F) | 16 mm (0.6 inches) | 81% | moderate |