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Sejny Weather and Climate: A Comprehensive Guide

The temperature in Sejny can vary greatly throughout the year. The temperatures shift from warm to very cold. It receives a reasonable amount of rain/snowfall. Now, let’s break down all the climate details for a clearer picture.

Average maximum day and minimum night temperature

Depending on the time of the year, temperatures range from comfortable to very cold in Sejny. Average daytime temperatures reach a comfortable 24°C in July. In January, the coolest month of the year, temperatures drop to a very cold 1°C.

At night, you can expect cooler temperatures, with averages dropping to around -5°C during this month. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Generally, Sejny has a moderate amount of precipitation, averaging 719 mm of rain/snowfall annually. Sejny experiences moderate seasonal variation in rainfall, with monthly averages ranging from 91 mm in July, the wettest month, and 45 mm in March, the driest month.

The mean monthly precipitation over the year, including rain, hail and snow

Forecast for Sejny

Sun   Dec 22
4°C | 1°C
S 6 m/s
2.5 mm
overcast and sleet

overcast and sleet

Mon   Dec 23
5°C | 1°C
S 3 m/s
1.2 mm
overcast and slight rain

overcast and slight rain

Tue   Dec 24
3°C | 0°C
N 2 m/s
overcast and no rain

overcast and no rain

The best time of year to visit Sejny in Poland

During the months of June, July and August you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is winter in Sejny?
    The coldest season / winter is in the following months: January, February and December.
  • Which is the warmest month in Sejny?
    July has an average maximum temperature of 24°C and is the warmest month of the year.
  • Which is the coldest month in Sejny?
    The coldest month is January with an average maximum temperature of 1°C.
  • Which is the wettest month in Sejny?
    July tops the wettest month list with 91 mm of rainfall.
  • Which is the driest month in Sejny?
    March is the driest month with 45 mm of precipitation.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.