September Weather in Jonestown, United States

Last updated: June 24, 2025

In Jonestown, United States, the average temperature in September hovers around 20°C (68°F). However, be prepared for variations, as temperatures can dip to a chilly 4°C (39°F) or soar to a hot 33°C (92°F). Rainfall is not uncommon, with an average precipitation of 115 mm (4.5 in) over 10 days. The atmosphere is generally humid, with an average humidity level of 66%.

September Temperature in Jonestown

In September in Jonestown, the average temperature is 20°C (68°F). Maximum temperatures can reach up to 33°C (92°F), while minimums can drop as low as 4°C (39°F). It's a great time for travelers to enjoy mild weather and plan outdoor activities.

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

The chart illustrates September temperature patterns in Jonestown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jonestown, September typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (39°F).

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

September Precipitation in Jonestown

In Jonestown in September, the precipitation amount is 115 mm (4.5 in) over a span of 10 days.

September Precipitation Trends in Jonestown

The chart displays monthly precipitation patterns in Jonestown, 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 Jonestown, September typically receives around 115 mm (4.5 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 Jonestown

In Jonestown in September, humidity is 66%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making outdoor activities enjoyable but potentially a bit sticky, so travelers should stay hydrated and consider light, breathable clothing for comfort.

September Average Humidity in Jonestown

This chart illustrates the average monthly humidity levels in Jonestown, 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 Jonestown is approximately 66%, 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 Jonestown

In Jonestown 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 Jonestown.

Maximum UV Index Levels in Jonestown for September

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

Data source: Jonestown 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 Jonestown Compares to Other Months

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

This table compares monthly weather conditions in Jonestown, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	74 mm (2.9 inches)	87%	moderate
February Weather	1°C (35°F)	107 mm (4.2 inches)	85%	moderate
March Weather	5°C (41°F)	98 mm (3.8 inches)	85%	high
April Weather	11°C (52°F)	110 mm (4.4 inches)	83%	very high
May Weather	17°C (62°F)	127 mm (5.0 inches)	75%	very high
June Weather	21°C (71°F)	106 mm (4.2 inches)	73%	very high
July Weather	25°C (76°F)	152 mm (6.0 inches)	65%	very high
August Weather	23°C (74°F)	140 mm (5.5 inches)	62%	very high
September Weather	20°C (68°F)	115 mm (4.5 inches)	66%	very high
October Weather	14°C (58°F)	114 mm (4.5 inches)	79%	high
November Weather	6°C (43°F)	98 mm (3.9 inches)	87%	moderate
December Weather	2°C (36°F)	94 mm (3.7 inches)	85%	low