April Weather in Kostroma, Russian Federation

Last updated: August 27, 2025

In April, the average temperature in Kostroma, Russian Federation hovers around 4°C (40°F). Prepare for a range of temperatures, as the minimum can dip to -13°C (9°F) while the maximum can reach up to 23°C (74°F). Expect about 47 mm (1.9 in) of precipitation spread across 9 days, and be ready for a rather humid climate with an average humidity of 84%.

April Temperature in Kostroma

In April in Kostroma, the average temperature is 4°C (40°F). Maximums can reach 23°C (74°F), while minimums can drop as low as -13°C (9°F). Be prepared for a wide range of temperatures when traveling during this time.

April Weather in Kostroma: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Kostroma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kostroma, April typically has an average temperature of 4°C (40°F), with highs reaching up to 23°C (74°F) and lows dropping to around -13°C (9°F).

Data source: Temperature data for Kostroma generated using information from the Copernicus Climate Change Service.

April Precipitation in Kostroma

In Kostroma in April, the precipitation amount is 47 mm (1.9 in) spread over a period of 9 days.

April Precipitation Trends in Kostroma

The chart displays monthly precipitation patterns in Kostroma, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Kostroma, April typically receives around 47 mm (1.9 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

April Humidity in Kostroma

In Kostroma in April, humidity is 84%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and requiring extra layers to stay warm and dry while traveling.

April Average Humidity in Kostroma

This chart illustrates the average monthly humidity levels in Kostroma, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Kostroma is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Kostroma

In Kostroma in April, 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 Kostroma for better planning.

Maximum UV Index Levels in Kostroma for April

The chart shows the monthly maximum UV Index (UVI) for Kostroma in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Kostroma typically reaches 4, which falls under the moderate exposure category.

Data source: Kostroma April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How April Weather in Kostroma Compares to Other Months

Weather in Kostroma varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Kostroma, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Kostroma, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	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