October weather forecastPortland, ME
October
Weather in October
October allows Portland to fully embrace fall, with temperatures dropping from 47.5°F (8.6°C) to 56.3°F (13.5°C). The weather is comfortably cool, painting a beautifully rustic picture of the city. Portland's surroundings can boast of a beautiful palette of fall colors during this month. The annual Harvest Festival is a not-to-be-missed event, capturing the city in its full fall glory. As the month progresses, the city prepares to welcome the mellow chills of winter.Temperature
October brings a minor decrease, with the average high-temperature reducing from a refreshing 66.4°F (19.1°C) in September to a mild 56.3°F (13.5°C). Portland records a consistent average nighttime temperature of 47.5°F (8.6°C) in October, slightly lower than the daytime high.Humidity
The average relative humidity in October is 78%.Rainfall
October is the month with the most rainfall. Rain falls for 11.5 days and accumulates 2.36" (60mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. October is the first month it typically snows. Throughout October, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, in Portland, there are 29.7 snowfall days, and 11.73" (298mm) of snow is accumulated.Ocean temperature
In October, the average ocean temperature is 55°F (12.8°C).Note: Navigating the 55°F (12.8°C) at 55.4°F (13°C) is no joy, and temperatures less than 50°F (10°C) can threaten breathing and cause a chilling shock, gauging personal stamina.
Daylight
In Portland, the average length of the day in October is 11h and 0min.On the first day of October, sunrise is at 6:39 am and sunset at 6:21 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 5:32 pm EDT.
Sunshine
In Portland, the average sunshine in October is 6.3h.UV index
In October, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In October, the average maximum UV index of 3 translates into the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Portland, ME
- Average high temperature in October: 56.3°F
The warmest month (with the highest average high temperature) is July (72.5°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in October: 47.5°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in October
Portland, ME
- Average pressure in October: 30"Hg
The months with the highest atmospheric pressure are September and November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in October
Portland, ME
- Average wind speed in October: 10.4mph
The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest months (with the lowest average wind speed) are July and August (7.5mph).
Average humidity in October
Portland, ME
- Average humidity in October: 78%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (74%).
Average rainfall in October
Portland, ME
- Average rainfall in October: 2.36"
The wettest month (with the highest rainfall) is October (2.36").
The driest month (with the least rainfall) is September (1.18").
Average rainfall days in October
Portland, ME
- Average rainfall days in October: 11.5 days
The month with the highest number of rainy days is July (14.7 days).
The month with the least rainy days is January (5.7 days).
Average snowfall in October
Portland, ME
- Average snowfall in October: 0.04"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in October
Portland, ME
- Average snowfall days in October: 0.1 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in October
Portland, ME
- Average sea temperature in October: 54.9°F
The best month for swimming (with the highest average sea temperature) is August (63.7°F).
The coldest month (with the lowest average sea temperature) is March (38°F).
Average daylight in October /
Average sunshine in October
Portland, ME
- Average daylight in October: 11h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in October: 6h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in October
Portland, ME
- Average sunshine days in October: 17.4 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (13.8 days).
Average UV index in October
Portland, ME
- Average UV index in October: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in October
Portland, ME
- Average cloud cover in October: 42
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in October
Portland, ME
- 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).
