October Weather in Johnston, United States

Last updated: June 24, 2025

In October, the average temperature in Johnston, United States is a pleasant 20°C (69°F), with a range that can drop to a brisk 1°C (35°F) and peak at a sweltering 37°C (99°F). Expect about 80 mm (3.1 in) of precipitation spread over 9 days, contributing to an average humidity level of 78%. Whether you prefer warmth or cool breezes, this month offers a diverse climate experience.

October Temperature in Johnston

In October in Johnston, the average temperature is 20°C (69°F). Maximums can reach 37°C (99°F), and minimums can drop as low as 1°C (35°F). Be prepared for a wide range of temperatures during your travels.

October Weather in Johnston: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Johnston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Johnston, October typically has an average temperature of 20°C (69°F), with highs reaching up to 37°C (99°F) and lows dropping to around 1°C (35°F).

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

October Precipitation in Johnston

In Johnston in October, the precipitation amount is 80 mm (3.1 in) spread over 9 days.

October Precipitation Trends in Johnston

The chart displays monthly precipitation patterns in Johnston, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Johnston, October typically receives around 80 mm (3.1 inches) of precipitation spread over approximately 9 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Johnston

In Johnston in October, humidity is 78%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick and heavy, urging you to seek out shaded areas and refreshing drinks.

October Average Humidity in Johnston

This chart illustrates the average monthly humidity levels in Johnston, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Johnston is approximately 78%, offering insight into how humid the weather typically is during this month.

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

October UV Index in Johnston

In Johnston in October, 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 Johnston.

Maximum UV Index Levels in Johnston for October

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

Data source: Johnston October 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 October Weather in Johnston Compares to Other Months

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

This table compares monthly weather conditions in Johnston, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	84 mm (3.3 inches)	86%	moderate
February Weather	12°C (54°F)	114 mm (4.5 inches)	81%	high
March Weather	14°C (58°F)	85 mm (3.4 inches)	81%	very high
April Weather	18°C (65°F)	115 mm (4.5 inches)	79%	very high
May Weather	23°C (74°F)	110 mm (4.3 inches)	75%	extreme
June Weather	26°C (79°F)	101 mm (4.0 inches)	75%	extreme
July Weather	28°C (82°F)	137 mm (5.4 inches)	80%	extreme
August Weather	27°C (80°F)	142 mm (5.6 inches)	81%	extreme
September Weather	25°C (77°F)	84 mm (3.3 inches)	83%	very high
October Weather	20°C (69°F)	80 mm (3.1 inches)	78%	very high
November Weather	13°C (55°F)	69 mm (2.7 inches)	85%	high
December Weather	10°C (51°F)	119 mm (4.7 inches)	87%	moderate