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September Weather in Lomonosov, Russian Federation

Last updated: August 27, 2025

In Lomonosov, Russian Federation, the average temperature in September is a mild 13°C (56°F), with lows dipping to 5°C (42°F) and highs reaching up to 22°C (71°F). Expect a fair amount of rain, with 103 mm (4.0 in) of precipitation spread across about 15 days. The average humidity sits at a high 90%, ensuring a damp, refreshing atmosphere.

September Temperature in Lomonosov

In September in Lomonosov, the average temperature is 13°C (56°F), with maximums reaching up to 22°C (71°F) and minimums dropping as low as 5°C (42°F). Overall, it's a mild and comfortable time to visit, making it perfect for outdoor exploration and sightseeing.

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

The chart illustrates September temperature patterns in Lomonosov, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lomonosov, September typically has an average temperature of 13°C (56°F), with highs reaching up to 22°C (71°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec262529374961656355453729
Data source: Temperature data for Lomonosov 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 Lomonosov

In Lomonosov in September, the precipitation amount is 103 mm (4.0 in) that falls over a span of 15 days.

September Precipitation Trends in Lomonosov

The chart displays monthly precipitation patterns in Lomonosov, 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 Lomonosov, September typically receives around 103 mm (4.0 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec455655474955871391031127579
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lomonosov

In Lomonosov in September, humidity is 90%. With an average temperature of 13°C (56°F), this humidity feels like a moist blanket enveloping you, making every step sticky and muggy, and forcing you to take frequent breaks in the shade as you explore the scenery.

September Average Humidity in Lomonosov

This chart illustrates the average monthly humidity levels in Lomonosov, 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 Lomonosov is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec97%94%90%86%71%77%82%86%90%93%93%94%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lomonosov

In Lomonosov 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 Lomonosov for better planning.

Maximum UV Index Levels in Lomonosov for September

The chart shows the monthly maximum UV Index (UVI) for Lomonosov 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 Lomonosov typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123457754211
Data source: Lomonosov 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 Lomonosov Compares to Other Months

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

This table compares monthly weather conditions in Lomonosov, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)45 mm (1.8 inches)97%low
February Weather-4°C (25°F)55 mm (2.2 inches)94%low
March Weather-2°C (29°F)55 mm (2.2 inches)90%moderate
April Weather3°C (38°F)47 mm (1.8 inches)86%moderate
May Weather9°C (49°F)49 mm (1.9 inches)71%moderate
June Weather16°C (61°F)55 mm (2.1 inches)77%high
July Weather18°C (65°F)87 mm (3.4 inches)82%high
August Weather17°C (63°F)139 mm (5.5 inches)86%moderate
September Weather13°C (56°F)103 mm (4.0 inches)90%moderate
October Weather7°C (46°F)112 mm (4.4 inches)93%low
November Weather3°C (38°F)75 mm (2.9 inches)93%low
December Weather-2°C (29°F)79 mm (3.1 inches)94%low

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