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
A moderate decline in the average high-temperature is seen in Portland during October, decreasing from a warm 74.1°F (23.4°C) in September to an enjoyable 61.7°F (16.5°C). Throughout October, Portland records an average temperature of 45.5°F (7.5°C) at night.Humidity
In Portland, the average relative humidity in October is 75%.Rainfall
In Portland, in October, it is raining for 15.8 days, with typically 3.39" (86mm) of accumulated precipitation. Throughout the year, in Portland, there are 173.1 rainfall days, and 31.18" (792mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall in Portland.Daylight
The average length of the day in October is 10h and 55min.On the first day of October in Portland, sunrise is at 7:10 am and sunset at 6:50 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 5:58 pm PDT.
Sunshine
In Portland, Oregon, the average sunshine in October is 5.5h.UV index
In Portland, the average daily maximum UV index in October is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In October, a daily maximum UV index of 3 leads to the following instructions:
Undertake precautions - Guarding against sun damage is counselled. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
What are the temperatures in Portland in October?
What is the average humidity in October in Portland?
How many days does it rain in October in Portland?
When it does not snow in Portland?
Does it snow in Portland in October?
What is the average length of the day in October in Portland?
What time are sunrise and sunset in October in Portland?
How long on average sun shines in October in Portland?
How high is the UV index in October in Portland?
Average temperature in October
Portland, OR
- Average high temperature in October: 61.7°F
The warmest month (with the highest average high temperature) is August (81.5°F).
The month with the lowest average high temperature is December (44.1°F).
- Average low temperature in October: 45.5°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).
Average pressure in October
Portland, OR
- Average pressure in October: 30.05"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in October
Portland, OR
- Average wind speed in October: 4.7mph
The windiest month (with the highest average wind speed) is January (5.8mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in October
Portland, OR
- Average humidity in October: 75%
The months with the highest relative humidity are January, February and December (83%).
The month with the lowest relative humidity is August (63%).
Average rainfall in October
Portland, OR
- Average rainfall in October: 3.39"
The wettest month (with the highest rainfall) is December (4.53").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in October
Portland, OR
- Average rainfall days in October: 15.8 days
The month with the highest number of rainy days is March (20.4 days).
The month with the least rainy days is July (4.9 days).
Average snowfall in October
Portland, OR
- Average snowfall in October: 0"
The month with the highest snowfall is March (1.5").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in October
Portland, OR
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in October /
Average sunshine in October
Portland, OR
- Average daylight in October: 10h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in October: 5h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in October
Portland, OR
- Average sunshine days in October: 13.9 days
The months with the most sunshine days are July and August (23.8 days).
The month with the least sunshine days is March (8.3 days).
Average UV index in October
Portland, OR
- Average UV index in October: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in October
Portland, OR
- Average cloud cover in October: 42
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in October
Portland, OR
- Average visibility in October: 5mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
Portland, Oregon, USA
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