Last updated: June 24, 2025
In May, the average temperature in Ashton-Sandy Spring, United States hovers around 18°C (65°F), with extremes ranging from a chilly 2°C (35°F) to a warm 34°C (93°F). Expect 139 mm (5.5 in) of precipitation over 14 days, contributing to the region's average humidity of 78%. Whether you're bracing for a cool breeze or soaking up the heat, make sure to prepare for a dynamic climate!
In May in Ashton-Sandy Spring, the average temperature is 18°C (65°F). Maximums can reach 34°C (93°F), and minimums can be as low as 2°C (35°F). Be prepared for a wide range of temperatures when traveling during this month, so pack accordingly!
In Ashton-Sandy Spring, in May, the precipitation amount is 139 mm (5.5 in) over the course of 14 days.
In Ashton-Sandy Spring in May, humidity is 78%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket, making travel quite muggy and potentially uncomfortable, as it can leave you feeling sticky and fatigued more quickly than usual.
In Ashton-Sandy Spring in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Ashton-Sandy Spring.
UV Risk Categories
Weather in Ashton-Sandy Spring varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Ashton-Sandy Spring, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (36°F) | 60 mm (2.4 inches) | 84% | moderate |
| February Weather | 4°C (40°F) | 99 mm (3.9 inches) | 83% | moderate |
| March Weather | 7°C (45°F) | 89 mm (3.5 inches) | 83% | high |
| April Weather | 13°C (56°F) | 94 mm (3.7 inches) | 81% | very high |
| May Weather | 18°C (65°F) | 139 mm (5.5 inches) | 78% | very high |
| June Weather | 23°C (74°F) | 133 mm (5.2 inches) | 79% | very high |
| July Weather | 26°C (80°F) | 168 mm (6.6 inches) | 74% | very high |
| August Weather | 25°C (77°F) | 148 mm (5.8 inches) | 72% | very high |
| September Weather | 21°C (71°F) | 105 mm (4.1 inches) | 75% | very high |
| October Weather | 16°C (61°F) | 106 mm (4.2 inches) | 81% | high |
| November Weather | 8°C (47°F) | 84 mm (3.3 inches) | 85% | moderate |
| December Weather | 4°C (40°F) | 95 mm (3.7 inches) | 84% | moderate |