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Temperatures in April

It's cool to moderate in April in Koper with an average temperature of 18°C. Temperatures this month range from a low of 16°C to a high of 20°C. At night, you can expect temperatures between 6°C and 11°C.

Max and Min Temperatures per Day

Daily Temperature in April in Koper

This chart shows the daily maximum and minimum temperatures in degrees Celsius for Koper in April. The red line indicates the max temperatures, and the blue line shows the minimums.

Start of April

The month of April starts in Koper with mild temperatures, averaging around 18°C during the day and nights close to 8°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.

Mid-April

By mid-April, the average daytime temperature stays the same at 18°C, with nights close to 9°C. There might be a few showers during this period, but plenty of dry days with sunshine too.

End of April

By the end of April, the average daytime temperature in Koper will be around 19°C, with nights close to 11°C. A shower might show up, but overall the weather will be dry and sunny.

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Precipitation in April

In April, there is an average of 60 mm of precipitation, spread over 9 days. Of the total precipitation, about 0,2 cm falls as snow in April. The wind speed is around 3 Bft, mostly coming from the East.

The average precipitation chance is 30% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.

Precipitation Chance

Daily precipitation chance in percentages for Koper in April

This chart shows the daily precipitation chance (in percentages) in April for Koper. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.

Koper in April

London
Temperature Average Temperature
18°C 15°C
Sun High Temp
20°C 18°C
Sun Low Temp
16°C 12°C
Rain Total Precipitation
60 mm 29 mm
Rain Rainy Days
9 days 7 days
Snow Total Snowfall
0,2 cm 0 cm
Snow Snowy Days
1 day 0 days

UV index

The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.

Is April a good time to visit Koper?

Want nice weather? Then April is a great time to be in Koper. You’ll have pleasant temperatures and not too much rain this month.

Temperature records for Koper in April

With 27°C, Koper hit the highest temperature in the last 10 years in April 2018. The lowest daytime temperature in this month was 8°C in 2015. The extreme night temperatures ranged from a low of -3°C to a high of 16°C.

Check out the climate of Koper for all months and discover the best travel time

Curious about the climate in other parts of Slovenia? Check out the weather and climate in places like Ljubljana, Bled, Bohinj, or have a look at other destinations in Slovenia.

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Daily Temperature in April in Koper

This chart shows the average daily temperatures, both day and night, for each day in April in Koper, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.

Daily Temperature in April in Koper

Daily Precipitation in April in Koper

The chart below shows the average daily precipitation in April for Koper, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.

A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for April, you can expect around 9 days of rain in Koper.

Daily Precipitation in April in Koper

Daily Snowfall in April in Koper

This chart shows the average daily snowfall in April in Koper, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in April.

Daily Snowfall in April in Koper

Daily UV Index in April in Koper

This chart shows the average daily UV index in April in Koper, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.

Daily UV Index in April in Koper

Temperature in April in Koper Over the Years

This chart shows the average temperature in April in Koper, measured in degrees Celsius, over the past years.

Temperature in April in Koper Over the Years

Total Precipitation in April in Koper Over the Years

This chart shows the average precipitation in April in Koper, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.

Precipitation in April in Koper Over the Years

Snowfall in April in Koper per year

This chart shows the average snowfall in April in Koper, measured in centimetres, over the past years.

Snowfall in April in Koper over the past years

Daily climate in April for Koper

Click on a specific day in April for detailed info on the typical weather on that day in Koper. Check out the historical temperatures and precipitation over the past 10 years on this day.

Weather experiences in April in Koper

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Average Weather in Koper by Month

Click on a month below to see detailed weather info for Koper. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.


Or check out the climate of Koper for all months at once

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