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September Weather in Snowflake, United States

Last updated: June 24, 2025

In September, the average temperature in Snowflake, United States hovers around 21°C (71°F), offering a pleasant climate. However, be prepared for a minimum dip to 3°C (38°F) and a maximum rise up to 35°C (96°F). Expect some light rain, with a total precipitation amount of 23 mm (0.9 in) spread over about 4 days. The average humidity sits at a comfortable 59%, making it a great time to explore!

September Temperature in Snowflake

In September in Snowflake, the average temperature is 21°C (71°F). Maximums can reach 35°C (96°F), while minimums can drop as low as 3°C (38°F). It's essential to pack for both warm and cool weather when traveling during this month.

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

The chart illustrates September temperature patterns in Snowflake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Snowflake, September typically has an average temperature of 21°C (71°F), with highs reaching up to 35°C (96°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec374148576577787771584838
Data source: Temperature data for Snowflake 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 Snowflake

In Snowflake in September, the total precipitation amount is 23 mm (0.9 in) over a span of 4 days.

September Precipitation Trends in Snowflake

The chart displays monthly precipitation patterns in Snowflake, 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 Snowflake, September typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec25302511115462423221220
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Snowflake

In Snowflake in September, humidity is 59%. With an average temperature of 21°C (71°F), this humidity feels like a gentle embrace, making it comfortable for exploring the sights while experiencing a pleasant warmth that invites leisurely strolls.

September Average Humidity in Snowflake

This chart illustrates the average monthly humidity levels in Snowflake, 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 Snowflake is approximately 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%83%72%63%46%35%33%41%59%70%79%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Snowflake

In Snowflake in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Snowflake.

Maximum UV Index Levels in Snowflake for September

The chart shows the monthly maximum UV Index (UVI) for Snowflake 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 Snowflake typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5710111213131211865
Data source: Snowflake 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 Snowflake Compares to Other Months

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

This table compares monthly weather conditions in Snowflake, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)25 mm (1.0 inches)80%moderate
February Weather5°C (41°F)30 mm (1.2 inches)83%high
March Weather9°C (49°F)25 mm (1.0 inches)72%very high
April Weather14°C (58°F)11 mm (0.4 inches)63%extreme
May Weather18°C (65°F)11 mm (0.4 inches)46%extreme
June Weather25°C (77°F)5 mm (0.2 inches)35%extreme
July Weather25°C (78°F)46 mm (1.8 inches)33%extreme
August Weather25°C (77°F)24 mm (1.0 inches)41%extreme
September Weather21°C (71°F)23 mm (0.9 inches)59%extreme
October Weather14°C (58°F)22 mm (0.8 inches)70%very high
November Weather9°C (48°F)12 mm (0.5 inches)79%high
December Weather3°C (38°F)20 mm (0.8 inches)82%moderate

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