September Weather in Si Satchanalai, Thailand

Last updated: August 27, 2025

September in Si Satchanalai, Thailand, showcases a tropical climate characterized by warm temperatures and significant rainfall. With a maximum temperature peaking at 36°C (97°F) and an average of 29°C (84°F), the weather can feel quite hot and humid. The minimum temperature dips to a comfortable 24°C (76°F) during the evenings. This month is also marked by considerable precipitation, totaling 228 mm (9.0 in) over approximately 22 rainy days, leading to a humid environment with an average humidity level of 84%. Visitors should prepare for frequent showers while enjoying the lush, vibrant landscape that September's rains bring to this historic region.

September Temperature in Si Satchanalai

In September, Si Satchanalai experiences a warm and humid climate, with temperatures reflecting the tail end of the wet season. The average temperature hovers around 29°C (84°F), providing a comforting warmth, while the maximum can reach a pleasant 36°C (97°F). Nights cool down slightly, with a minimum of about 24°C (76°F), offering a reprieve from the daytime heat. Compared to the steamy months of April and May, where highs soar above 40°C (104°F), September offers a more manageable warmth that is conducive for exploring the rich culture and natural beauty of this historic Thai town. As the month progresses, the temperatures begin to decline, hinting at the cooler months ahead, making it an ideal time for visitors seeking an enjoyable blend of heat and comfort.

September Weather in Si Satchanalai: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Si Satchanalai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Si Satchanalai, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec777986888785858383838176
Data source: Temperature data for Si Satchanalai generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Si Satchanalai

September in Si Satchanalai, Thailand, is characterized by significant rainfall, with the month receiving an impressive 228 mm (9.0 in) of precipitation over approximately 22 days. This marks a slight decrease from the previous month, August, which boasts the highest rainfall of the year at 325 mm (12.8 in). The monsoon season peaks in the summer months, and while September continues to witness substantial wet weather, it sets the stage for a gradual decline in precipitation as the year progresses. The trend showcases an evolving climate pattern; after the torrential downpours of July and August, September maintains a robust rainfall threshold, hinting at nature's powerful influence in this region during the rainy season.

September Precipitation Trends in Si Satchanalai

The chart displays monthly precipitation patterns in Si Satchanalai, 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 Si Satchanalai, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec2398781561872023252281482417
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Si Satchanalai

In Si Satchanalai, Thailand, September sees humidity levels at a substantial 84%, reflecting a continuation of the region's wet and humid climate trend established in the preceding months. Following a steady increase from 48% in February to an impressive 87% in August, September maintains a high level of moisture, keeping pace with the peak rainforest conditions typical of this time of year. As the monsoon season progresses, this month, while slightly lower than August, still signifies a significant humidity that contributes to the lush landscapes and vibrant ecosystems of the area. Looking ahead, a gradual decline is anticipated in October, where humidity drops to 71%, hinting at the transition towards drier months ahead.

September Average Humidity in Si Satchanalai

This chart illustrates the average monthly humidity levels in Si Satchanalai, 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 Si Satchanalai is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec51%48%45%49%71%84%84%87%84%71%62%55%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Si Satchanalai

In September, Si Satchanalai experiences a notably high UV Index of 14, categorizing it as extreme, with a rapid burn time of just 10 minutes. This trend of intense UV radiation is consistent throughout the preceding months, as both July and August also recorded a UV Index of 14, indicating that the region is in the grips of peak sun intensity during this time of year. Following this, the UV Index begins to slightly decrease in October, but even then remains in the extreme category. As you enjoy the beautiful landscapes and cultural heritage of Si Satchanalai, it’s essential to stay sun-safe. For more detailed information on UV levels, check out Si Satchanalai UV Index.

Maximum UV Index Levels in Si Satchanalai for September

The chart shows the monthly maximum UV Index (UVI) for Si Satchanalai 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 Si Satchanalai typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131314131414141398
Data source: Si Satchanalai 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.

September Sunshine in Si Satchanalai

As September unfolds in Si Satchanalai, Thailand, it enjoys an average of 272 hours of sunshine, marking a pleasant transition from the sultry summer months. This slight uptick from August’s 247 hours indicates a gradual recovery in sunshine as the rainy season begins to wane. Interestingly, September tends to serve as a bridge, offering more sun than the preceding months while still falling short of the peak radiance seen in the earlier spring months; March shines the brightest with 333 hours. With October on the horizon boasting 281 hours of sunlight, travelers can anticipate a refreshing blend of rain and sun, setting the stage for picturesque explorations in this historical town.

Monthly Sunshine Duration in Si Satchanalai: September Highlighted

The September sunshine duration represents the total number of hours Si Satchanalai experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec251h296h333h324h328h283h265h247h272h281h302h312h
Data source: Si Satchanalai September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Si Satchanalai During September

In Si Satchanalai, Thailand, the likelihood of sunny weather dramatically fluctuates throughout the year. January and February bask in sunlight with probabilities soaring to 80% and 88%, respectively, making them ideal for outdoor activities. However, as the seasons progress, the chances for sunshine plummet, hitting a low of just 12% in September. This month falls within the rainy season, where overcast skies are more common, transitioning into the drier months of October and November, where sunny days start to return. With November boasting a 59% likelihood of sunshine, it's clear that while September may be draped in clouds, the sun will inevitably reclaim its place as the season shifts.

Percentage of Sunny Days in September in Si Satchanalai

The chart illustrates the percentage of sunny days in Si Satchanalai throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Si Satchanalai experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec80%88%72%26%43%15%12%11%12%24%59%86%
Data source: Si Satchanalai September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Si Satchanalai in September

In September, Si Satchanalai enjoys a comforting 12 hours of daylight, maintaining the pattern established over the summer months. The trend of increasing daylight duration peaks in June and July with 13 hours, before gradually tapering down in late summer to the consistent 12 hours seen from March to August. As autumn approaches, October brings a slight decrease to 11 hours, signaling a transition back into shorter days. Overall, the rhythmic cycle of daylight in Si Satchanalai reflects the region's tropical climate, where hours of sunlight provide a vibrant backdrop to the changing seasons.

Average Daylight Hours in Si Satchanalai for September

The chart illustrates the variation in daylight duration in Si Satchanalai throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 11m11h 33m12h 2m12h 31m12h 56m13h 8m13h 2m12h 40m12h 12m11h 43m11h 18m11h 5m
Data source: Si Satchanalai daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Si Satchanalai

As September rolls into Si Satchanalai, Thailand, the average wind speed dips to 1.2 m/s (3 mph), marking the calm before the arrival of the cooler months. This gentle breeze is a charming contrast to the summer's slightly brisker winds, which peaked at 2.2 m/s (5 mph) in June. The transition into fall sees a consistent decrease in wind velocity, with October and November following suit at 1.1 m/s (2 mph). This gradual decline symbolizes the shifting seasons, creating a tranquil atmosphere perfect for experiencing the rich cultural tapestry and historical landscapes of the area. The mild winds of September invite visitors to savor the serene beauty of Si Satchanalai, lulling them into a peaceful rhythm as the world around slows down.

Average September Wind Speed in Si Satchanalai

The chart displays monthly wind speed patterns in Si Satchanalai, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec1.51.71.91.51.72.21.91.71.2 m/s1.11.11.4
Data source: Si Satchanalai September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Si Satchanalai Compares to Other Months

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

In September, the weather is considerably warmer and more humid, with average temperatures around 29°C (84°F) and a high of 36°C (97°F). This month experiences significant rainfall, averaging 228 mm (9.0 in) over 22 days, contributing to a humidity level of 84%. In contrast, January brings a much cooler climate, with average temperatures of 25°C (77°F) and a minimum of 12°C (53°F). Rainfall is sparse, with just 23 mm (0.9 in) occurring over only 2 days, leading to a much lower humidity level of 51%. For more detailed information about January weather, visit Si Satchanalai weather in January.

In September, the weather experiences considerably higher humidity with an average temperature of 29°C (84°F) and frequent rainfall, totaling 228 mm (9.0 in) over 22 days. In stark contrast, February offers a much drier climate with only 9 mm (0.4 in) of precipitation over just one day, while temperatures range from a minimum of 15°C (59°F) to a maximum of 38°C (101°F), resulting in a more arid atmosphere with 48% humidity. This significant difference in weather patterns makes February a more pleasant time to visit compared to the wet and humid conditions of September. For a detailed overview of February’s climate, check out Si Satchanalai weather in February.

September and March present quite contrasting weather conditions. In September, temperatures range from a minimum of 24°C (76°F) to a maximum of 36°C (97°F), with an average of 29°C (84°F). This month is characterized by high humidity at 84% and significant precipitation, totaling 228 mm (9.0 in) over approximately 22 days. In stark contrast, March experiences slightly higher average temperatures of 30°C (86°F), peaking at 40°C (105°F), while the minimum temperature drops to 18°C (64°F). Notably, March sees minimal rainfall, with only 8 mm (0.3 in) recorded on just one day, accompanied by a much lower humidity level of 45%. For more detailed insights, you can visit Si Satchanalai weather in March.

September and April present contrasting weather conditions. In September, temperatures range from a minimum of 24°C (76°F) to a maximum of 36°C (97°F), with an average of 29°C (84°F). This month also experiences significant precipitation, totaling 228 mm (9.0 in) over 22 days, accompanied by high humidity levels at 84%. In contrast, April offers warmer temperatures, with a lower minimum of 21°C (70°F) and a maximum soaring to 43°C (109°F), averaging around 31°C (88°F). Rainfall is much lighter in April, totaling only 78 mm (3.1 in) across 9 days, and the humidity is notably lower at 49%. For a closer look at the weather in April, you can visit Si Satchanalai weather in April.

In comparing the weather between September and May, both months exhibit warm temperatures, but May tends to be hotter overall. September sees a temperature range with a minimum of 24°C (76°F), an average of 29°C (84°F), and a maximum of 36°C (97°F), along with significant rainfall of 228 mm (9.0 in) over 22 days and high humidity at 84%. In contrast, May has a similar minimum of 24°C (75°F) but boasts an average of 31°C (88°F) and can reach a scorching maximum of 42°C (108°F). Rainfall is less in May, totaling 156 mm (6.1 in) over 16 days, coupled with lower humidity at 71%. This makes May feel hotter and drier despite the occasional downpour. For more specific details, check out Si Satchanalai weather in May.

In September, the weather features a minimum temperature of 24°C (76°F) and an average of 29°C (84°F), with maximums reaching 36°C (97°F). This month sees significant rainfall, with 228 mm (9.0 in) of precipitation over 22 days, maintaining a humidity level of 84%. In contrast, June boasts a slightly higher average temperature of 30°C (86°F) and maximums that can soar up to 40°C (104°F), although it experiences less precipitation at 187 mm (7.4 in) over 21 days, while also maintaining the same humidity of 84%. Generally, September tends to be wetter and a bit cooler than June. For more details on June's weather, visit Si Satchanalai weather in June.

In comparing the weather between September and July, both months experience similar average temperatures, with September averaging 29°C (84°F) and July slightly higher at 29°C (85°F). However, July sees a higher maximum temperature, peaking at 40°C (105°F), contrasted with September's maximum of 36°C (97°F). In terms of precipitation, September is notably wetter, receiving 228 mm (9.0 in) over 22 days, while July has 202 mm (7.9 in) over 24 days. Both months maintain a high humidity level of 84%, contributing to the tropical feel in the region. For further details on July weather, visit Si Satchanalai weather in July.

In September, temperatures range from a minimum of 24°C (76°F) to a maximum of 36°C (97°F), with an average temperature of 29°C (84°F). The month experiences significant rainfall, with 228 mm (9.0 in) of precipitation over 22 days, and humidity levels remain high at 84%. In contrast, August tends to be hotter, with a maximum temperature reaching 38°C (100°F) and an average of 28°C (83°F). August also sees more rainfall, totaling 325 mm (12.8 in) over 26 days and a slightly higher humidity of 87%. For a more detailed look at the weather patterns, you can check Si Satchanalai weather in August.

September and October present a noticeable shift in weather patterns. September experiences higher average temperatures, with a minimum of 24°C (76°F) and a maximum of 36°C (97°F), accompanied by a significant amount of rainfall totaling 228 mm (9.0 in) across 22 days and a high humidity level of 84%. In contrast, October sees a slight decrease in average temperature, with a minimum of 22°C (72°F) and a maximum of 38°C (100°F), but the total precipitation drops to 148 mm (5.8 in) over 17 days, leading to a more comfortable humidity level of 71%. This transition signifies a turn towards drier conditions as the month progresses. For more detailed information, check out Si Satchanalai weather in October.

September and November present quite a contrast in weather conditions. In September, temperatures range from a minimum of 24°C (76°F) to a scorching maximum of 36°C (97°F), with an average of 29°C (84°F). This month is characterized by high humidity at 84% and significant rainfall, with 228 mm (9.0 in) of precipitation over 22 rainy days. In contrast, November sees milder temperatures, with a minimum of 18°C (65°F) and an average of 27°C (81°F), while still reaching up to 36°C (97°F). The humidity drops to a more comfortable 62%, and precipitation is significantly reduced to just 24 mm (0.9 in) over 5 days. For more detailed information, visit Si Satchanalai weather in November.

September and December present contrasting weather patterns. In September, temperatures range from a warm minimum of 24°C (76°F) to a sweltering maximum of 36°C (97°F), with an average of 29°C (84°F). This month is marked by significant rainfall, totaling 228 mm (9.0 in) across 22 days, and high humidity levels at 84%. In contrast, December brings a much cooler climate, with temperatures dropping to a minimum of 12°C (53°F) and averaging 24°C (76°F), while still reaching up to 36°C (98°F). Precipitation during December is scarce, accumulating only 17 mm (0.7 in) over just 2 days, and the humidity decreases to a more comfortable 55%. For more details, check Si Satchanalai weather in December.

Compare Si Satchanalai's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Si Satchanalai

September in Si Satchanalai brings a noticeable shift in weather compared to other months, with higher humidity levels and increased precipitation, creating a lush and vibrant atmosphere. While daytime temperatures can peak at a steamy 36°C, the average remains comfortably warm at 29°C. However, this month stands out with frequent rain, occurring on about 22 days, contributing to a total of 228 mm of precipitation. This combination of warmth and moisture sets September apart, making it a unique time to experience the burgeoning greenery and cooler evenings. For a deeper dive into the climate trends throughout the year, explore Si Satchanalai Climate.