Last updated: June 24, 2025
In December, the average temperature in Lewisville, United States is a pleasant 10°C (51°F). However, be prepared for temperature fluctuations, with minimums dipping to -4°C (26°F) and maximums reaching up to 27°C (80°F). During this month, you can expect around 143 mm (5.6 in) of precipitation over 9 days, contributing to a high average humidity level of 88%.
In December in Lewisville, the average temperature is 10°C (51°F). The maximum can reach 27°C (80°F), while the minimum can drop to as low as -4°C (26°F). This wide range of temperatures makes Lewisville a destination where travelers should be prepared for both warm days and chilly nights.
In Lewisville, in December, the precipitation amount is 143 mm (5.6 in) over the course of 9 days.
In Lewisville in December, humidity is 88%. With an average temperature of 10°C (51°F), this humidity feels like a thick blanket of moisture enveloping you, making every step feel heavier and leaving you yearning for a refreshing breeze as you navigate the streets.
In Lewisville 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 Lewisville for better planning.
UV Risk Categories
Weather in Lewisville varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Lewisville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 8°C (47°F) | 102 mm (4.0 inches) | 82% | moderate |
| February Weather | 10°C (50°F) | 161 mm (6.3 inches) | 80% | high |
| March Weather | 15°C (60°F) | 138 mm (5.4 inches) | 78% | very high |
| April Weather | 18°C (64°F) | 183 mm (7.2 inches) | 79% | extreme |
| May Weather | 23°C (74°F) | 143 mm (5.6 inches) | 81% | extreme |
| June Weather | 27°C (81°F) | 115 mm (4.5 inches) | 77% | extreme |
| July Weather | 28°C (83°F) | 70 mm (2.8 inches) | 72% | extreme |
| August Weather | 28°C (83°F) | 100 mm (3.9 inches) | 65% | extreme |
| September Weather | 26°C (78°F) | 89 mm (3.5 inches) | 63% | very high |
| October Weather | 19°C (67°F) | 105 mm (4.1 inches) | 70% | very high |
| November Weather | 13°C (55°F) | 69 mm (2.7 inches) | 82% | high |
| December Weather | 10°C (51°F) | 143 mm (5.6 inches) | 88% | moderate |