Last updated: June 24, 2025
In Prospect, United States, the average temperature in December hovers around 10°C (49°F). You'll experience a range of temperatures, with a minimum dipping to -7°C (20°F) and a maximum peaking at 26°C (78°F). Be prepared for some rain, as 120 mm (4.7 in) of precipitation is expected over 9 days. The air tends to be quite moist, with an average humidity of 86%.
In December in Prospect, the average temperature is 10°C (49°F), with maximums reaching up to 26°C (78°F) and minimums dropping as low as -7°C (20°F). This wide range of temperatures makes it essential for travelers to pack both warm and light clothing to suit varying weather conditions.
In Prospect in December, the precipitation amount is 120 mm (4.7 in) over the course of 9 days.
In Prospect in December, humidity is 86%. With an average temperature of 10°C (49°F), this humidity feels like a chilly blanket enveloping you, making travel somewhat uncomfortable as the dampness accentuates the cold, leaving you feeling clammy and chilled, which is a reminder to dress in layers and stay prepared for the damp air.
In Prospect 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 Prospect for better planning.
UV Risk Categories
Weather in Prospect varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Prospect, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 8°C (46°F) | 88 mm (3.5 inches) | 85% | moderate |
| February Weather | 11°C (52°F) | 96 mm (3.8 inches) | 82% | high |
| March Weather | 13°C (56°F) | 73 mm (2.9 inches) | 81% | very high |
| April Weather | 18°C (64°F) | 99 mm (3.9 inches) | 80% | very high |
| May Weather | 23°C (73°F) | 112 mm (4.4 inches) | 81% | extreme |
| June Weather | 25°C (78°F) | 126 mm (5.0 inches) | 81% | extreme |
| July Weather | 27°C (81°F) | 124 mm (4.9 inches) | 81% | extreme |
| August Weather | 27°C (80°F) | 148 mm (5.8 inches) | 80% | very high |
| September Weather | 24°C (76°F) | 157 mm (6.2 inches) | 79% | very high |
| October Weather | 20°C (68°F) | 60 mm (2.3 inches) | 80% | very high |
| November Weather | 12°C (54°F) | 79 mm (3.1 inches) | 85% | high |
| December Weather | 10°C (49°F) | 120 mm (4.7 inches) | 86% | moderate |