Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Harbor registers an average high-temperature of an enjoyable 66.7°F (19.3°C) with the arrival of September, showing minor deviation from the preceding month. Throughout September, the average low-temperature dips to a cool 53.6°F (12°C).Humidity
The months with the lowest humidity are July and September, with an average relative humidity of 76%.Rainfall
In Harbor, during September, the rain falls for 5.9 days and regularly aggregates up to 1.14" (29mm) of precipitation. In Harbor, Oregon, during the entire year, the rain falls for 130.9 days and collects up to 47.09" (1196mm) of precipitation.Snowfall
January, March through December are months without snowfall.Ocean temperature
In September, the average ocean temperature in Harbor is 53.2°F (11.8°C).Note: Diving into 53.2°F (11.8°C) is practical below 50°F (10°C), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 55.4°F (13°C) feels ice-cold.
Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:43 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:59 pm PDT.
Sunshine
In September, the average sunshine is 10.1h.UV index
In Harbor, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: In September, a regular UV index of 4 translates into these guidelines:
Heed the precautions - It is counselled to guard against solar damage. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Harbor?
What are the least humid months?
What is the average humidity in September in Harbor?
How much does it rain in September?
When it does not snow?
What is the ocean temperature in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Harbor, OR
- Average high temperature in September: 66.7°F
The warmest months (with the highest average high temperature) are July and August (68.5°F).
The month with the lowest average high temperature is December (50.9°F).
- Average low temperature in September: 53.6°F
The month with the highest average low temperature is July (55°F).
The coldest month (with the lowest average low temperature) is February (43°F).
Average pressure in September
Harbor, OR
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are August and September (30"Hg).
Average wind speed in September
Harbor, OR
- Average wind speed in September: 7.9mph
The windiest month (with the highest average wind speed) is June (10.1mph).
The calmest month (with the lowest average wind speed) is August (7.6mph).
Average humidity in September
Harbor, OR
- Average humidity in September: 76%
The month with the highest relative humidity is March (82%).
The months with the lowest relative humidity are July and September (76%).
Average rainfall in September
Harbor, OR
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is December (8.11").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in September
Harbor, OR
- Average rainfall days in September: 5.9 days
The month with the highest number of rainy days is March (18.6 days).
The month with the least rainy days is July (2.2 days).
Average snowfall in September
Harbor, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Harbor, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in September
Harbor, OR
- Average sea temperature in September: 53.2°F
The best month for swimming (with the highest average sea temperature) is July (53.5°F).
The coldest months (with the lowest average sea temperature) are January, February and April (50.8°F).
Average daylight in September /
Average sunshine in September
Harbor, OR
- Average daylight in September: 12h and 3min
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 September: 10h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Harbor, OR
- Average sunshine days in September: 23.4 days
The month with the most sunshine days is July (28.3 days).
The month with the least sunshine days is March (11 days).
Average UV index in September
Harbor, OR
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is February (UV index 2).
Average cloud cover in September
Harbor, OR
- Average cloud cover in September: 18
The months with the most cloud cover are January and March (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in September
Harbor, OR
- Average visibility in September: 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).
Harbor, Oregon, USA
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