September Weather in Lyndeborough, United States

Last updated: June 24, 2025

In Lyndeborough, United States, the average temperature in September rests at a pleasant 18°C (64°F). During this time, temperatures can fluctuate, with a minimum of 1°C (35°F) and soaring up to 33°C (92°F). Expect around 84 mm (3.3 in) of precipitation spread over 8 rainy days, coupled with a comfortable average humidity of 71%. Enjoy the mild climate!

September Temperature in Lyndeborough

In September in Lyndeborough, the average temperature is 18°C (64°F). The maximum can reach 33°C (92°F), while the minimum can drop as low as 1°C (35°F). This makes it an ideal time for outdoor activities and exploring the local attractions, but be sure to pack for both warm days and cool nights.

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

The chart illustrates September temperature patterns in Lyndeborough, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lyndeborough, September typically has an average temperature of 18°C (64°F), with highs reaching up to 33°C (92°F) and lows dropping to around 1°C (35°F).

Data source: Temperature data for Lyndeborough generated using information from the Copernicus Climate Change Service.

September Precipitation in Lyndeborough

In Lyndeborough in September, the precipitation amount is 84 mm (3.3 in) spread over 8 days.

September Precipitation Trends in Lyndeborough

The chart displays monthly precipitation patterns in Lyndeborough, 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 Lyndeborough, September typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Lyndeborough

In Lyndeborough in September, humidity is 71%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making traveling a bit sticky but still pleasant as the warmth envelops you, urging you to explore the vibrant surroundings while staying hydrated.

September Average Humidity in Lyndeborough

This chart illustrates the average monthly humidity levels in Lyndeborough, 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 Lyndeborough is approximately 71%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lyndeborough

In Lyndeborough in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Lyndeborough.

Maximum UV Index Levels in Lyndeborough for September

The chart shows the monthly maximum UV Index (UVI) for Lyndeborough 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 Lyndeborough typically reaches 7, which falls under the high exposure category.

Data source: Lyndeborough 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 Lyndeborough Compares to Other Months

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

This table compares monthly weather conditions in Lyndeborough, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (26°F)	72 mm (2.8 inches)	86%	moderate
February Weather	-2°C (28°F)	86 mm (3.4 inches)	84%	moderate
March Weather	1°C (35°F)	80 mm (3.2 inches)	82%	moderate
April Weather	8°C (46°F)	130 mm (5.1 inches)	80%	very high
May Weather	14°C (58°F)	80 mm (3.2 inches)	72%	very high
June Weather	20°C (68°F)	84 mm (3.3 inches)	72%	very high
July Weather	23°C (73°F)	144 mm (5.7 inches)	67%	very high
August Weather	22°C (71°F)	97 mm (3.8 inches)	66%	very high
September Weather	18°C (64°F)	84 mm (3.3 inches)	71%	high
October Weather	11°C (53°F)	132 mm (5.2 inches)	78%	moderate
November Weather	4°C (39°F)	103 mm (4.1 inches)	84%	moderate
December Weather	-1°C (30°F)	120 mm (4.7 inches)	81%	low