Last updated: August 27, 2025
In May, the average temperature in Kostroma, Russian Federation is a pleasant 12°C (53°F). However, don't be surprised by the extremes, as temperatures can dip to a chilly -4°C (25°F) or soar to a sizzling 31°C (88°F). Expect around 61 mm (2.4 in) of precipitation spread over 11 days, contributing to an average humidity of 72%. Prepare for a month that showcases both the warmth and whimsical weather of the season!
In May in Kostroma, the average temperature is 12°C (53°F). Maximum temperatures can reach 31°C (88°F), while minimums can drop as low as -4°C (25°F). Be prepared for a wide range of temperatures when traveling during this month.
In Kostroma in May, the total precipitation amount is 61 mm (2.4 in) over the course of 11 days.
In Kostroma in May humidity is 72%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill that clings to your clothes, making outdoor exploration slightly uncomfortable but invigorating as you navigate the refreshing air.
In Kostroma in May, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Kostroma.
UV Risk Categories
Weather in Kostroma varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Kostroma, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (19°F) | 45 mm (1.8 inches) | 99% | low |
| February Weather | -7°C (20°F) | 54 mm (2.1 inches) | 97% | low |
| March Weather | -3°C (28°F) | 44 mm (1.7 inches) | 93% | moderate |
| April Weather | 4°C (40°F) | 47 mm (1.9 inches) | 84% | moderate |
| May Weather | 12°C (53°F) | 61 mm (2.4 inches) | 72% | moderate |
| June Weather | 16°C (62°F) | 62 mm (2.5 inches) | 73% | high |
| July Weather | 18°C (65°F) | 84 mm (3.3 inches) | 76% | high |
| August Weather | 17°C (62°F) | 71 mm (2.8 inches) | 77% | high |
| September Weather | 11°C (52°F) | 77 mm (3.0 inches) | 89% | moderate |
| October Weather | 6°C (43°F) | 74 mm (2.9 inches) | 91% | low |
| November Weather | 0°C (32°F) | 64 mm (2.5 inches) | 94% | low |
| December Weather | -6°C (22°F) | 51 mm (2.0 inches) | 92% | low |