September Weather in Hampstead, United States

Last updated: June 24, 2025

In September, the average temperature in Hampstead, United States is 21°C (70°F), with fluctuations ranging from a cool 6°C (42°F) to a warm 34°C (93°F). Expect an average rainfall of 121 mm (4.8 in) over 10 rainy days, and humidity levels around 75% create a cozy atmosphere throughout the month.

September Temperature in Hampstead

In September in Hampstead, the average temperature is 21°C (70°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 6°C (42°F). This pleasant climate makes Hampstead an ideal destination for travelers seeking a comfortable getaway.

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

The chart illustrates September temperature patterns in Hampstead, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hampstead, September typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (93°F) and lows dropping to around 6°C (42°F).

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

September Precipitation in Hampstead

In Hampstead in September, the precipitation amount is 121 mm (4.8 in) spread over a period of 10 days.

September Precipitation Trends in Hampstead

The chart displays monthly precipitation patterns in Hampstead, 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 Hampstead, September typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 10 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 Hampstead

In Hampstead in September, humidity is 75%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that makes exploring the area feel slightly sticky, requiring travelers to stay hydrated and take occasional breaks in the shade to fully enjoy their adventures.

September Average Humidity in Hampstead

This chart illustrates the average monthly humidity levels in Hampstead, 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 Hampstead is approximately 75%, 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 Hampstead

In Hampstead 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 Hampstead.

Maximum UV Index Levels in Hampstead for September

The chart shows the monthly maximum UV Index (UVI) for Hampstead 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 Hampstead typically reaches 8, which falls under the very high exposure category.

Data source: Hampstead 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 Hampstead Compares to Other Months

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

This table compares monthly weather conditions in Hampstead, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (35°F)	63 mm (2.5 inches)	84%	moderate
February Weather	4°C (39°F)	98 mm (3.9 inches)	83%	moderate
March Weather	7°C (44°F)	94 mm (3.7 inches)	83%	high
April Weather	12°C (55°F)	104 mm (4.1 inches)	81%	very high
May Weather	18°C (64°F)	148 mm (5.8 inches)	78%	very high
June Weather	23°C (73°F)	129 mm (5.1 inches)	79%	very high
July Weather	26°C (79°F)	161 mm (6.4 inches)	74%	very high
August Weather	24°C (76°F)	165 mm (6.5 inches)	72%	very high
September Weather	21°C (70°F)	121 mm (4.8 inches)	75%	very high
October Weather	16°C (60°F)	109 mm (4.3 inches)	81%	high
November Weather	7°C (46°F)	90 mm (3.6 inches)	85%	moderate
December Weather	4°C (39°F)	100 mm (3.9 inches)	84%	moderate