September Weather in Altavista, United States

Last updated: June 24, 2025

In September, the average temperature in Altavista, United States hovers around 23°C (73°F), creating a pleasant backdrop for outdoor activities. However, be prepared for a temperature range that can drop to a chilly 7°C (45°F) or soar to a steamy 37°C (99°F). This month also sees 109 mm (4.3 in) of precipitation across 11 days, contributing to an average humidity level of 75%, perfect for those who enjoy a lush, vibrant environment.

September Temperature in Altavista

In September in Altavista, the average temperature is 23°C (73°F). Maximums can reach 37°C (99°F), while minimums can dip as low as 7°C (45°F). Be prepared for a range of weather conditions, making it an ideal time for travelers who enjoy both warmth and cooler evenings.

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

The chart illustrates September temperature patterns in Altavista, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altavista, September typically has an average temperature of 23°C (73°F), with highs reaching up to 37°C (99°F) and lows dropping to around 7°C (45°F).

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

September Precipitation in Altavista

In Altavista in September, the precipitation amount is 109 mm (4.3 in), occurring over a span of 11 days.

September Precipitation Trends in Altavista

The chart displays monthly precipitation patterns in Altavista, 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 Altavista, September typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Altavista

In Altavista in September, humidity is 75%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace, making travel slightly uncomfortable yet invigorating as the air wraps around you, creating a sense of walking through a lush, tropical paradise.

September Average Humidity in Altavista

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

In Altavista 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 Altavista.

Maximum UV Index Levels in Altavista for September

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

Data source: Altavista 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 Altavista Compares to Other Months

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

This table compares monthly weather conditions in Altavista, 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 (40°F)	75 mm (2.9 inches)	84%	moderate
February Weather	7°C (45°F)	112 mm (4.4 inches)	84%	high
March Weather	10°C (50°F)	70 mm (2.8 inches)	84%	high
April Weather	15°C (60°F)	130 mm (5.1 inches)	82%	very high
May Weather	20°C (68°F)	118 mm (4.6 inches)	82%	very high
June Weather	24°C (75°F)	94 mm (3.7 inches)	83%	extreme
July Weather	27°C (81°F)	63 mm (2.5 inches)	79%	very high
August Weather	25°C (78°F)	105 mm (4.1 inches)	77%	very high
September Weather	23°C (73°F)	109 mm (4.3 inches)	75%	very high
October Weather	17°C (63°F)	110 mm (4.3 inches)	81%	high
November Weather	9°C (49°F)	78 mm (3.1 inches)	87%	moderate
December Weather	6°C (44°F)	104 mm (4.1 inches)	85%	moderate