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September Weather in Risti, Estonia

Last updated: August 23, 2025

In September, the average temperature in Risti, Estonia hovers around 14°C (57°F). Expect a range with minimums dipping to 4°C (40°F) and maximums reaching up to 23°C (74°F). This month brings 85 mm (3.3 in) of precipitation over 14 days, accompanied by a notable humidity level of 87%.

September Temperature in Risti

In September in Risti, the average temperature is 14°C (57°F), with maximums reaching 23°C (74°F) and minimums dipping down to 4°C (40°F). This climate makes it an ideal time for travelers looking to enjoy mild weather while exploring the sights.

September Weather in Risti: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Risti, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Risti, September typically has an average temperature of 14°C (57°F), with highs reaching up to 23°C (74°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec312933415061656457484134
Data source: Temperature data for Risti generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Risti

In Risti in September, the precipitation amount is 85 mm (3.3 in) over the course of 14 days.

September Precipitation Trends in Risti

The chart displays monthly precipitation patterns in Risti, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Risti, September typically receives around 85 mm (3.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec4649543740578399851097561
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Risti

In Risti in September humidity is 87%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making every breath feel heavy and sticky, which can be quite challenging for travelers exploring the city.

September Average Humidity in Risti

This chart illustrates the average monthly humidity levels in Risti, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Risti is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%91%90%87%76%80%80%83%87%90%91%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Risti

In Risti in September, 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 Risti for better planning.

Maximum UV Index Levels in Risti for September

The chart shows the monthly maximum UV Index (UVI) for Risti in September, 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 September, the maximum UV index in Risti typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123457764211
Data source: Risti September 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 September Weather in Risti Compares to Other Months

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

This table compares monthly weather conditions in Risti, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)46 mm (1.8 inches)92%low
February Weather-2°C (29°F)49 mm (1.9 inches)91%low
March Weather0°C (33°F)54 mm (2.1 inches)90%moderate
April Weather5°C (41°F)37 mm (1.5 inches)87%moderate
May Weather10°C (51°F)40 mm (1.6 inches)76%moderate
June Weather16°C (61°F)57 mm (2.3 inches)80%high
July Weather18°C (65°F)83 mm (3.3 inches)80%high
August Weather18°C (64°F)99 mm (3.9 inches)83%high
September Weather14°C (57°F)85 mm (3.3 inches)87%moderate
October Weather9°C (49°F)109 mm (4.3 inches)90%low
November Weather5°C (42°F)75 mm (2.9 inches)91%low
December Weather1°C (34°F)61 mm (2.4 inches)90%low

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