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September Weather in Hammarland, Åland Islands

Last updated: August 22, 2025

In September, the average temperature in Hammarland, Åland Islands hovers around 13°C (56°F), with a comfortable range between a minimum of 2°C (36°F) and a maximum of 23°C (74°F). During this month, expect about 49 mm (1.9 in) of precipitation spread over 9 days, coupled with a relatively high average humidity of 86%. Embrace the season and prepare for a mix of cozy and refreshing days!

September Temperature in Hammarland

In September in Hammarland, the average temperature is 13°C (56°F). The maximum can reach 23°C (74°F), while the minimum can be as low as 2°C (36°F). This mild weather makes Hammarland an ideal destination for travelers looking to explore comfortably.

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

The chart illustrates September temperature patterns in Hammarland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hammarland, September typically has an average temperature of 13°C (56°F), with highs reaching up to 23°C (74°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec333134404860646355474135
Data source: Temperature data for Hammarland 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 Hammarland

In Hammarland in September, the total precipitation amount is 49 mm (1.9 in) spread over 9 days.

September Precipitation Trends in Hammarland

The chart displays monthly precipitation patterns in Hammarland, 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 Hammarland, September typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec393235243730495349734363
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hammarland

In Hammarland in September, humidity is 86%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket enveloping you, making outdoor activities slightly uncomfortable and prompting travelers to seek shade or air-conditioned spaces frequently.

September Average Humidity in Hammarland

This chart illustrates the average monthly humidity levels in Hammarland, 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 Hammarland is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%90%85%77%76%75%78%86%91%91%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hammarland

In Hammarland 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 Hammarland for better planning.

Maximum UV Index Levels in Hammarland for September

The chart shows the monthly maximum UV Index (UVI) for Hammarland 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 Hammarland typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113457754211
Data source: Hammarland 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 Hammarland Compares to Other Months

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

This table compares monthly weather conditions in Hammarland, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)39 mm (1.6 inches)92%low
February Weather-1°C (31°F)32 mm (1.3 inches)90%low
March Weather1°C (35°F)35 mm (1.4 inches)90%moderate
April Weather4°C (40°F)24 mm (1.0 inches)85%moderate
May Weather9°C (49°F)37 mm (1.5 inches)77%moderate
June Weather15°C (60°F)30 mm (1.2 inches)76%high
July Weather18°C (64°F)49 mm (1.9 inches)75%high
August Weather17°C (63°F)53 mm (2.1 inches)78%moderate
September Weather13°C (56°F)49 mm (1.9 inches)86%moderate
October Weather9°C (48°F)73 mm (2.9 inches)90%low
November Weather5°C (41°F)43 mm (1.7 inches)91%low
December Weather2°C (36°F)63 mm (2.5 inches)90%low

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