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September Weather in Annaka, Japan

Last updated: August 23, 2025

In Annaka, Japan, the average temperature in September is a mild 22°C (71°F), with daily temperatures ranging from a cool 12°C (54°F) to a warm 34°C (93°F). Expect a fair bit of rain, as the region receives about 256 mm (10.1 in) of precipitation over 21 days, contributing to an average humidity of 89%. Be prepared for a humid atmosphere as you explore this vibrant locale!

September Temperature in Annaka

In September in Annaka, the average temperature is 22°C (71°F), with maximums reaching 34°C (93°F) and minimums dipping to a cool 12°C (54°F). This climate makes Annaka a perfect destination for travelers seeking pleasant weather and varied outdoor activities.

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

The chart illustrates September temperature patterns in Annaka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Annaka, September typically has an average temperature of 22°C (71°F), with highs reaching up to 34°C (93°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec394147556469767971625243
Data source: Temperature data for Annaka 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 Annaka

In Annaka in September, the precipitation amount is 256 mm (10.1 in), occurring over a span of 21 days.

September Precipitation Trends in Annaka

The chart displays monthly precipitation patterns in Annaka, 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 Annaka, September typically receives around 256 mm (10.1 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec57551341481742123382142563195054
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Annaka

In Annaka in September humidity is 89%. With an average temperature of 22°C (71°F), this humidity feels like a warm blanket wrapped around you, making travel a bit more challenging as perspiration clings to your skin and the air feels thick, slowing your pace and requiring frequent breaks to stay refreshed.

September Average Humidity in Annaka

This chart illustrates the average monthly humidity levels in Annaka, 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 Annaka is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%79%81%88%92%92%89%87%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Annaka

In Annaka in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Annaka.

Maximum UV Index Levels in Annaka for September

The chart shows the monthly maximum UV Index (UVI) for Annaka 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 Annaka typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46891111111110753
Data source: Annaka 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 Annaka Compares to Other Months

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

This table compares monthly weather conditions in Annaka, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)57 mm (2.3 inches)88%moderate
February Weather5°C (41°F)55 mm (2.2 inches)86%high
March Weather9°C (48°F)134 mm (5.3 inches)81%very high
April Weather13°C (55°F)148 mm (5.8 inches)78%very high
May Weather18°C (65°F)174 mm (6.8 inches)81%extreme
June Weather21°C (69°F)212 mm (8.3 inches)88%extreme
July Weather24°C (76°F)338 mm (13.3 inches)92%extreme
August Weather26°C (79°F)214 mm (8.4 inches)92%extreme
September Weather22°C (71°F)256 mm (10.1 inches)89%very high
October Weather16°C (62°F)319 mm (12.6 inches)87%high
November Weather11°C (52°F)50 mm (2.0 inches)85%moderate
December Weather6°C (43°F)54 mm (2.1 inches)86%moderate

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