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September Weather in Spencer, United States

Last updated: June 24, 2025

In Spencer, United States, the average temperature during September hovers around 17°C (63°F). However, be prepared for some temperature fluctuations, as it can dip to a chilly -1°C (31°F) or soar up to a warm 32°C (90°F). Expect 99 mm (3.9 in) of precipitation spread over 9 days, accompanied by an average humidity level of 78%.

September Temperature in Spencer

In September in Spencer, the average temperature is 17°C (63°F), with maximums reaching up to 32°C (90°F) and minimums dropping as low as -1°C (31°F). It's essential to pack layers and be prepared for varying weather conditions while enjoying your travels.

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

The chart illustrates September temperature patterns in Spencer, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Spencer, September typically has an average temperature of 17°C (63°F), with highs reaching up to 32°C (90°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec252834465866717063533831
Data source: Temperature data for Spencer 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 Spencer

In Spencer in September, the precipitation amount is 99 mm (3.9 in) during a span of 9 days.

September Precipitation Trends in Spencer

The chart displays monthly precipitation patterns in Spencer, 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 Spencer, September typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec758986123133102142106991458992
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Spencer

In Spencer in September, humidity is 78%. With an average temperature of 17°C (63°F), this humidity feels like a warm, enveloping blanket, making traveling slightly uncomfortable as you navigate the sticky air, prompting the need for frequent breaks in cooler, shaded areas.

September Average Humidity in Spencer

This chart illustrates the average monthly humidity levels in Spencer, 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 Spencer is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Spencer

In Spencer in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Spencer.

Maximum UV Index Levels in Spencer for September

The chart shows the monthly maximum UV Index (UVI) for Spencer 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 Spencer typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346810101098642
Data source: Spencer 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 Spencer Compares to Other Months

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

This table compares monthly weather conditions in Spencer, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)75 mm (2.9 inches)90%moderate
February Weather-2°C (28°F)89 mm (3.5 inches)90%moderate
March Weather1°C (35°F)86 mm (3.4 inches)87%high
April Weather8°C (46°F)123 mm (4.8 inches)88%very high
May Weather14°C (58°F)133 mm (5.3 inches)82%very high
June Weather19°C (66°F)102 mm (4.0 inches)79%very high
July Weather22°C (72°F)142 mm (5.6 inches)78%very high
August Weather21°C (70°F)106 mm (4.2 inches)76%very high
September Weather17°C (63°F)99 mm (3.9 inches)78%very high
October Weather12°C (53°F)145 mm (5.7 inches)84%high
November Weather3°C (38°F)89 mm (3.5 inches)89%moderate
December Weather-1°C (31°F)92 mm (3.6 inches)86%low

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