Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
The shift from September to October involves a decrease in the average high-temperature, from a hot 89.8°F (32.1°C) to a warm 77°F (25°C). A significant temperature decrease to an average a fresh 54.5°F (12.5°C) characterizes Grimes's nighttime temperatures during October.Humidity
The average relative humidity in October is 46%.Rainfall
In October, the rain falls for 3.9 days. Throughout October, 0.87" (22mm) of precipitation is accumulated. In Grimes, during the entire year, the rain falls for 75.1 days and collects up to 17.09" (434mm) of precipitation.Daylight
The average length of the day in October is 11h and 10min.On the first day of the month, sunrise is at 7:04 am and sunset at 6:49 pm. On the last day of October, in Grimes, sunrise is at 7:34 am and sunset at 6:07 pm PDT.
Sunshine
The average sunshine in October is 7.1h.UV index
The average daily maximum UV index in October is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A daily maximum UV index of 4 in October translates into the following instructions:
Exercise prevention - Precautions against solar damage are endorsed. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in October?
What is the average humidity in October?
How much does it rain in October?
What is the average length of the day in October?
When are sunrise and sunset in October?
How many hours of sunshine does Grimes have in October?
What is the UV index reading in October?
Average temperature in October
Grimes, CA
- Average high temperature in October: 77°F
The warmest month (with the highest average high temperature) is July (97.2°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in October: 54.5°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).
Average pressure in October
Grimes, CA
- Average pressure in October: 29.99"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in October
Grimes, CA
- Average wind speed in October: 5.2mph
The windiest month (with the highest average wind speed) is March (6.1mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in October
Grimes, CA
- Average humidity in October: 46%
The month with the highest relative humidity is March (73%).
The months with the lowest relative humidity are July and September (38%).
Average rainfall in October
Grimes, CA
- Average rainfall in October: 0.87"
The wettest month (with the highest rainfall) is February (3.07").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in October
Grimes, CA
- Average rainfall days in October: 3.9 days
The month with the highest number of rainy days is March (13.8 days).
The month with the least rainy days is July (0.9 days).
Average daylight in October /
Average sunshine in October
Grimes, CA
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in October: 7h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in October
Grimes, CA
- Average sunshine days in October: 26.5 days
The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is March (16.2 days).
Average UV index in October
Grimes, CA
- Average UV index in October: 4
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in October
Grimes, CA
- Average cloud cover in October: 15
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in October
Grimes, CA
- Average visibility in October: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Grimes, California, USA
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