September weather forecast
Point Roberts, WA

Weather in September

September, the first month of the autumn, in Point Roberts, is also an enjoyable month, with average temperature fluctuating between 62.1°F (16.7°C) and 53.8°F (12.1°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still comfortable 62.1°F (16.7°C). The average low-temperature, in September, is 53.8°F (12.1°C).

Humidity

In September, the average relative humidity is 80%.

Rainfall

In Point Roberts, during 11.5 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. Throughout the year, in Point Roberts, there are 155 rainfall days, and 30.04" (763mm) of precipitation is accumulated.

Snowfall

In Point Roberts snow does not fall in April through October.

Daylight

In September, the average length of the day is 12.6h.

Sunshine

In September, the average sunshine is 8.6h.

UV index

In September, the average daily maximum UV index in Point Roberts is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in September in Point Roberts?

In September, the average relative humidity in Point Roberts, Washington, is 80%.

How much does it rain in Point Roberts in September?

In Point Roberts, during September, the rain falls for 11.5 days and regularly aggregates up to 2.17" (55mm) of precipitation.

When it does not snow in Point Roberts?

April through October are months without snowfall in Point Roberts.

What is the average length of the day in September in Point Roberts?

In September, the average length of the day is 12.6h.

How many hours of sunshine does Point Roberts have in September?

The average sunshine in September is 8.6h.

What is the UV index reading in September in Point Roberts?

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in September
Point Roberts, WA

Average temperature in September - Point Roberts, WA
  • Average high temperature in September: 62.1°F

The warmest month (with the highest average high temperature) is July (66.9°F).
The month with the lowest average high temperature is December (41.5°F).

  • Average low temperature in September: 53.8°F

The month with the highest average low temperature is August (56.7°F).
The coldest month (with the lowest average low temperature) is December (36.5°F).

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Average pressure in September
Point Roberts, WA

Average pressure in September - Point Roberts, WA
  • Average pressure in September: 30.01"

Months with the highest atmospheric pressure are January and December (30.06").
The month with the lowest atmospheric pressure is March (29.99").

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Average wind speed in September
Point Roberts, WA

Average wind speed in September - Point Roberts, WA
  • Average wind speed in September: 4.9mph

The windiest month (with the highest average wind speed) is November (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

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Average humidity in September
Point Roberts, WA

Average humidity in September - Point Roberts, WA
  • Average humidity in September: 80%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is July (76%).

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Average rainfall in September
Point Roberts, WA

Average rainfall in September - Point Roberts, WA
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is November (4.53").
The driest month (with the least rainfall) is July (0.67").

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Average rainfall days in September
Point Roberts, WA

Average rainfall days in September - Point Roberts, WA
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is March (17.6 days).
The month with the least rainy days is August (6.4 days).

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Average snowfall in September
Point Roberts, WA

Average snowfall in September - Point Roberts, WA
  • Average snowfall in September: 0"

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

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Average snowfall days in September
Point Roberts, WA

Average snowfall days in September - Point Roberts, WA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.4 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Point Roberts, WA

Average daylight in September / Average sunshine in September - Point Roberts, WA
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

  • Average sunshine in September: 8.6h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is December (Average sunshine: 3.7h).

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Average sunshine days in September
Point Roberts, WA

Average sunshine days in September - Point Roberts, WA
  • Average sunshine days in September: 17 days

The month with the most sunshine days is July (22.3 days).
The month with the least sunshine days is March (10.9 days).

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Average UV index in September
Point Roberts, WA

Average UV index in September - Point Roberts, WA
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Point Roberts, WA

Average cloud cover in September - Point Roberts, WA
  • Average cloud cover in September: 36

The month with the most cloud cover is December (Cloud cover 60).
Months with the least cloud cover are July and August (Cloud cover 26).

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Average visibility in September
Point Roberts, WA

Average visibility in September - Point Roberts, WA
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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