October weather forecast
Hillsboro, OR

The red tree colors of the fall along a road and amid trees in this tranquil neighborhood in Hillsboro, Oregon
The red tree colors of the fall along a road and amid trees in this tranquil neighborhood in Hillsboro, Oregon

Weather in October

October, the same as September, is another comfortable autumn month in Hillsboro, Oregon, with an average temperature fluctuating between 61.2°F (16.2°C) and 45.1°F (7.3°C).

Temperature

In Hillsboro, the average high-temperature in October decreases from a moderately hot 73.9°F (23.3°C) in September to a comfortable 61.2°F (16.2°C). The average low-temperature, in Hillsboro, is 45.1°F (7.3°C).

Humidity

In October, the average relative humidity in Hillsboro is 78%.

Rainfall

In October, the rain falls for 15.9 days. Throughout October, 3.11" (79mm) of precipitation is accumulated. In Hillsboro, during the entire year, the rain falls for 173 days and collects up to 29.49" (749mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in October is 10h and 55min.
On the first day of October, sunrise is at 7:10 am and sunset at 6:52 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 6:00 pm PDT.

Sunshine

The average sunshine in October is 5.1h.

UV index

The average daily maximum UV index in October is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: In October, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in October in Hillsboro?

In October, in Hillsboro, Oregon, the average high-temperature is 61.2°F (16.2°C), and the average low-temperature is 45.1°F (7.3°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in August is appraised at 84.2°F (29°C).

What is the average humidity in October in Hillsboro?

In October, the average relative humidity in Hillsboro is 78%.

How many days does it rain in October in Hillsboro?

In Hillsboro, Oregon, in October, during 15.9 rainfall days, 3.11" (79mm) of precipitation is typically accumulated.

When it does not snow in Hillsboro?

In Hillsboro, snow does not fall in April through October.

Does it snow in Hillsboro in October?

In Hillsboro, in October, it doesn't snow. In November, it regularly snows.

What is the average length of the day in October in Hillsboro?

In Hillsboro, Oregon, the average day length in October is 10h and 55min.

What time are sunrise and sunset in October in Hillsboro?

In October, on the first day of the month, sunrise is at 7:10 am and sunset at 6:52 pm. On the last day of the month, in Hillsboro, Oregon, sunrise is at 7:50 am and sunset at 6:00 pm PDT.

How many hours of sunshine does Hillsboro have in October?

In Hillsboro, Oregon, the average sunshine duration in October is 5.1h.

How high is the UV index in October in Hillsboro?

In Hillsboro, Oregon, the average daily maximum UV index in October is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Hillsboro, OR

Average temperature in October - Hillsboro, OR
  • Average high temperature in October: 61.2°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 (43.9°F).

  • Average low temperature in October: 45.1°F

The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is December (34°F).

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Average pressure in October
Hillsboro, OR

Average pressure in October - Hillsboro, OR
  • Average pressure in October: 30.05"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).

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Average wind speed in October
Hillsboro, OR

Average wind speed in October - Hillsboro, OR
  • Average wind speed in October: 4.6mph

The windiest month (with the highest average wind speed) is March (5mph).
The calmest months (with the lowest average wind speed) are June, August and September (4.3mph).

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Average humidity in October
Hillsboro, OR

Average humidity in October - Hillsboro, OR
  • Average humidity in October: 78%

The months with the highest relative humidity are January, February, November and December (85%).
The month with the lowest relative humidity is August (64%).

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Average rainfall in October
Hillsboro, OR

Average rainfall in October - Hillsboro, OR
  • Average rainfall in October: 3.11"

The wettest month (with the highest rainfall) is January (4.57").
The driest month (with the least rainfall) is August (0.31").

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Average rainfall days in October
Hillsboro, OR

Average rainfall days in October - Hillsboro, OR
  • Average rainfall days in October: 15.9 days

The month with the highest number of rainy days is March (20.8 days).
The month with the least rainy days is August (4.4 days).

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Average snowfall in October
Hillsboro, OR

Average snowfall in October - Hillsboro, OR
  • Average snowfall in October: 0"

The month with the highest snowfall is February (1.81").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in October
Hillsboro, OR

Average snowfall days in October - Hillsboro, OR
  • Average snowfall days in October: 0 days

The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in October /
Average sunshine in October
Hillsboro, OR

Average daylight in October / Average sunshine in October - Hillsboro, OR
  • Average daylight in October: 10h and 55min

The month with the longest days is June (Average daylight: 15h and 38min).
The month with the shortest days is December (Average daylight: 8h and 46min).

  • Average sunshine in October: 5h and 6min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).

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Average sunshine days in October
Hillsboro, OR

Average sunshine days in October - Hillsboro, OR
  • Average sunshine days in October: 14 days

The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is March (8.5 days).

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Average UV index in October
Hillsboro, OR

Average UV index in October - Hillsboro, 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).

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Average cloud cover in October
Hillsboro, OR

Average cloud cover in October - Hillsboro, OR
  • Average cloud cover in October: 47

The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 25).

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Average visibility in October
Hillsboro, OR

Average visibility in October - Hillsboro, 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 and February (4mi).

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