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 sea temperature 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
In October, the meteorological conditions alter, with the average high-temperature shifting from a moderately hot 79.2°F (26.2°C) in September to an agreeable 69.8°F (21°C). Portsmouth experiences a nighttime temperature average of 58.1°F (14.5°C) during October.Humidity
The average relative humidity in October is 75%.Rainfall
In Portsmouth, during October, the rain falls for 9.9 days and regularly aggregates up to 1.57" (40mm) of precipitation. In Portsmouth, during the entire year, the rain falls for 151.9 days and collects up to 20.35" (517mm) of precipitation.Snowfall
In Portsmouth, snow does not fall in April through October.Ocean temperature
In Portsmouth, the average seawater temperature in October is 69.4°F (20.8°C).Note: For most individuals, swimming in 69.4°F (20.8°C) is not a pleasant experience. The difficulty in managing breathing increases as the temperature decreases from 69.8°F (21°C) to 59°F (15°C).
Daylight
The average length of the day in October is 11h and 14min.On the first day of the month, sunrise is at 7:01 am and sunset at 6:48 pm. On the last day of October, sunrise is at 7:28 am and sunset at 6:08 pm EDT.
Sunshine
In Portsmouth, the average sunshine in October is 5.9h.UV index
In October, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum UV index, 4 during October, leads to the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are October temperatures?
What is the average humidity in October?
How many days does it rain in October?
When it does not snow?
Does it snow in October?
What is the ocean temperature in October?
How many hours of daylight does Portsmouth have in October?
When is the sunrise / sunset in October?
How many hours of sunshine does Portsmouth have in October?
How high is the UV index in October?
Average temperature in October
Portsmouth, VA
- Average high temperature in October: 69.8°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (45.9°F).
- Average low temperature in October: 58.1°F
The month with the highest average low temperature is July (73.6°F).
The coldest month (with the lowest average low temperature) is January (34.7°F).
Average pressure in October
Portsmouth, VA
- Average pressure in October: 30.03"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in October
Portsmouth, VA
- Average wind speed in October: 9.3mph
The windiest months (with the highest average wind speed) are March and April (10.5mph).
The calmest month (with the lowest average wind speed) is August (7.5mph).
Average humidity in October
Portsmouth, VA
- Average humidity in October: 75%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are July and November (74%).
Average rainfall in October
Portsmouth, VA
- Average rainfall in October: 1.57"
The wettest month (with the highest rainfall) is August (2.52").
The driest month (with the least rainfall) is November (1.1").
Average rainfall days in October
Portsmouth, VA
- Average rainfall days in October: 9.9 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is November (8.3 days).
Average snowfall in October
Portsmouth, VA
- Average snowfall in October: 0"
The month with the highest snowfall is January (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in October
Portsmouth, VA
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is January (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in October
Portsmouth, VA
- Average sea temperature in October: 69.4°F
The best month for swimming (with the highest average sea temperature) is August (80°F).
The coldest month (with the lowest average sea temperature) is February (44.5°F).
Average daylight in October /
Average sunshine in October
Portsmouth, VA
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in October: 5h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in October
Portsmouth, VA
- Average sunshine days in October: 19.5 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is August (10.8 days).
Average UV index in October
Portsmouth, VA
- Average UV index in October: 4
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in October
Portsmouth, VA
- Average cloud cover in October: 34
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in October
Portsmouth, VA
- 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).
Portsmouth, Virginia, USA
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