September Weather in Lyman, United States

Last updated: June 24, 2025

In September, the average temperature in Lyman, United States hovers around 23°C (74°F). You can expect a minimum of 8°C (46°F) and a maximum that can reach up to 35°C (95°F). With 144 mm (5.7 in) of precipitation spread over 9 days, the average humidity sits at a comfortable 75%, making the climate quite engaging for visitors and locals alike.

September Temperature in Lyman

In September in Lyman, the average temperature is 23°C (74°F). Maximums can reach 35°C (95°F), while minimums can drop as low as 8°C (46°F). This makes Lyman an ideal destination for travelers seeking a pleasant and varied climate.

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

The chart illustrates September temperature patterns in Lyman, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lyman, September typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (95°F) and lows dropping to around 8°C (46°F).

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

September Precipitation in Lyman

In Lyman in September, the precipitation amount is 144 mm (5.7 in) spread over 9 days.

September Precipitation Trends in Lyman

The chart displays monthly precipitation patterns in Lyman, 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 Lyman, September typically receives around 144 mm (5.7 inches) of precipitation spread over approximately 9 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 Lyman

In Lyman in September, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

September Average Humidity in Lyman

This chart illustrates the average monthly humidity levels in Lyman, 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 Lyman 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 Lyman

In Lyman in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Lyman.

Maximum UV Index Levels in Lyman for September

The chart shows the monthly maximum UV Index (UVI) for Lyman 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 Lyman typically reaches 9, which falls under the very high exposure category.

Data source: Lyman 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 Lyman Compares to Other Months

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

This table compares monthly weather conditions in Lyman, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	98 mm (3.9 inches)	86%	moderate
February Weather	9°C (48°F)	136 mm (5.4 inches)	85%	high
March Weather	12°C (53°F)	100 mm (4.0 inches)	84%	very high
April Weather	16°C (61°F)	126 mm (5.0 inches)	82%	very high
May Weather	21°C (70°F)	128 mm (5.0 inches)	83%	extreme
June Weather	24°C (76°F)	77 mm (3.0 inches)	82%	extreme
July Weather	26°C (80°F)	82 mm (3.2 inches)	80%	extreme
August Weather	25°C (78°F)	109 mm (4.3 inches)	74%	very high
September Weather	23°C (74°F)	144 mm (5.7 inches)	75%	very high
October Weather	18°C (64°F)	133 mm (5.2 inches)	79%	very high
November Weather	10°C (50°F)	93 mm (3.6 inches)	87%	high
December Weather	8°C (46°F)	130 mm (5.1 inches)	87%	moderate