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September Weather in Mae Chai, Thailand

Last updated: August 27, 2025

In Mae Chai, Thailand, the average temperature in September hovers around 27°C (81°F), with comfortable minimums of 21°C (70°F) and warm maximums reaching 35°C (95°F). Expect average humidity levels at a lush 83%, along with a notable precipitation amount of 182 mm (7.2 in) spread over approximately 22 days.

September Temperature in Mae Chai

In September in Mae Chai, the average temperature is 27°C (81°F), with maximums reaching up to 35°C (95°F) and minimums dropping as low as 21°C (70°F). This pleasant climate makes it an ideal destination for travelers seeking warm weather and outdoor activities.

September Weather in Mae Chai: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Mae Chai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mae Chai, September typically has an average temperature of 27°C (81°F), with highs reaching up to 35°C (95°F) and lows dropping to around 21°C (70°F).
JanFebMarAprMayJunJulAugSepOctNovDec717480828483828181797670
Data source: Temperature data for Mae Chai 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 Mae Chai

In Mae Chai in September, the precipitation amount is 182 mm (7.2 in) over a span of 22 days.

September Precipitation Trends in Mae Chai

The chart displays monthly precipitation patterns in Mae Chai, 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 Mae Chai, September typically receives around 182 mm (7.2 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec25951071261712122601821222621
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mae Chai

In Mae Chai in September humidity is 83%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket enveloping you, making sightseeing and outdoor activities feel more exhausting and requiring frequent breaks to relax in the shade or cool off.

September Average Humidity in Mae Chai

This chart illustrates the average monthly humidity levels in Mae Chai, 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 Mae Chai is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec51%46%38%36%64%81%83%91%83%67%61%56%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mae Chai

In Mae Chai in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Mae Chai, you can check here.

Maximum UV Index Levels in Mae Chai for September

The chart shows the monthly maximum UV Index (UVI) for Mae Chai 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 Mae Chai typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9101213141414141413108
Data source: Mae Chai 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 Mae Chai Compares to Other Months

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

This table compares monthly weather conditions in Mae Chai, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather22°C (71°F)25 mm (1.0 inches)51%very high
February Weather23°C (74°F)9 mm (0.4 inches)46%very high
March Weather27°C (81°F)5 mm (0.2 inches)38%extreme
April Weather28°C (83°F)107 mm (4.2 inches)36%extreme
May Weather29°C (84°F)126 mm (4.9 inches)63%extreme
June Weather28°C (83°F)171 mm (6.7 inches)81%extreme
July Weather28°C (82°F)212 mm (8.4 inches)83%extreme
August Weather27°C (81°F)260 mm (10.2 inches)91%extreme
September Weather27°C (81°F)182 mm (7.2 inches)83%extreme
October Weather26°C (79°F)122 mm (4.8 inches)67%extreme
November Weather24°C (76°F)26 mm (1.0 inches)60%very high
December Weather21°C (71°F)21 mm (0.8 inches)56%very high

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