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 snowfall in October
- Average snowfall 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 average high-temperature exhibits a considerable decrease in October, dropping from a warm 75.6°F (24.2°C) in September to a mild 60.4°F (15.8°C). During October, the temperature tends to dip to an average of 44.6°F (7°C) at night.Humidity
The least humid month is October, with an average relative humidity of 70%.Rainfall
In October, the rain falls for 8.1 days. Throughout October, 1.06" (27mm) of precipitation is accumulated. In Grimes, during the entire year, the rain falls for 114.6 days and collects up to 15.51" (394mm) of precipitation.Snowfall
Months with snowfall in Grimes are January through May, October through December. October is the first month it typically snows. Throughout October, in the average 0.6 snowfall days, it receives 0.16" (4mm) of snow. In Grimes, during the entire year, snow falls for 29.6 days and aggregates up to 6.77" (172mm) of snow.Daylight
The average length of the day in October is 11h and 4min.On the first day of October, sunrise is at 7:12 am and sunset at 6:56 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 6:10 pm CDT.
Sunshine
In Grimes, the average sunshine in October is 5.7h.UV index
In Grimes, the average daily maximum UV index in October is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high daily UV index of 2 during October translates into the following directions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in October?
What is the least humid month in Grimes?
What is the average humidity in October?
How many days does it rain in October?
When does it start to snow?
How many hours of daylight does Grimes have in October?
When is the sunrise / sunset in October?
How many hours of sunshine does Grimes have in October?
How high is the UV index in October?
Average temperature in October
Grimes, IA
- Average high temperature in October: 60.4°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in October: 44.6°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in October
Grimes, IA
- Average pressure in October: 30.01"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in October
Grimes, IA
- Average wind speed in October: 9.4mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in October
Grimes, IA
- Average humidity in October: 70%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in October
Grimes, IA
- Average rainfall in October: 1.06"
The wettest months (with the highest rainfall) are May and June (2.52").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in October
Grimes, IA
- Average rainfall days in October: 8.1 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (3.5 days).
Average snowfall in October
Grimes, IA
- Average snowfall in October: 0.16"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
Grimes, IA
- Average snowfall days in October: 0.6 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Grimes, IA
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in October: 5h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in October
Grimes, IA
- Average sunshine days in October: 21 days
The month with the most sunshine days is December (22.8 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in October
Grimes, IA
- Average UV index in October: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in October
Grimes, IA
- Average cloud cover in October: 35
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is September (Cloud cover 28).
Average visibility in October
Grimes, IA
- Average visibility in October: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Grimes, Iowa, USA
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