Last updated: June 24, 2025
In Grass Valley, United States, the average temperature in October hovers around 15°C (60°F), with a minimum dipping to 1°C (34°F) and a maximum rising to 34°C (94°F). Expect about 78 mm (3.1 in) of precipitation over 3 days, and keep in mind the average humidity sits at a comfortable 65%. Enjoy the mild weather, but be prepared for occasional showers!
In October in Grass Valley, the average temperature is 15°C (60°F). The maximum can reach 34°C (94°F), while the minimum can be as low as 1°C (34°F). It's advisable to pack layers to accommodate the varied temperatures during your travels.
In Grass Valley in October, the precipitation amount is 78 mm (3.1 in) during a span of 3 days.
In Grass Valley in October, humidity is 65%. With an average temperature of 15°C (60°F), this humidity feels like a warm blanket wrapped around you, making it a bit muggy for traveling but still comfortable enough to enjoy outdoor activities.
In Grass Valley in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Grass Valley, you can refer to this Hourly UV Index in Grass Valley.
UV Risk Categories
Weather in Grass Valley varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Grass Valley, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 7°C (45°F) | 269 mm (10.6 inches) | 84% | moderate |
February Weather | 8°C (46°F) | 279 mm (11.0 inches) | 84% | moderate |
March Weather | 9°C (48°F) | 267 mm (10.5 inches) | 83% | high |
April Weather | 13°C (55°F) | 129 mm (5.1 inches) | 81% | very high |
May Weather | 17°C (62°F) | 76 mm (3.0 inches) | 74% | very high |
June Weather | 22°C (72°F) | 13 mm (0.5 inches) | 64% | extreme |
July Weather | 26°C (79°F) | 1 mm (0.0 inches) | 44% | extreme |
August Weather | 25°C (77°F) | 2 mm (0.1 inches) | 36% | very high |
September Weather | 21°C (70°F) | 23 mm (0.9 inches) | 44% | very high |
October Weather | 15°C (60°F) | 78 mm (3.1 inches) | 65% | high |
November Weather | 10°C (51°F) | 157 mm (6.2 inches) | 84% | moderate |
December Weather | 7°C (44°F) | 215 mm (8.4 inches) | 83% | moderate |