September weather forecast
Graham, WA

Weather in September

The first month of the autumn, September, is still a pleasant month in Graham, Washington, with an average temperature fluctuating between 69.8°F (21°C) and 48°F (8.9°C).

Temperature

In September, the average high-temperature marginally drops from a warm 77.2°F (25.1°C) in August to a pleasant 69.8°F (21°C). In Graham, in September, the average low-temperature is 48°F (8.9°C).

Humidity

In Graham, Washington, the average relative humidity in September is 75%.

Rainfall

In September, in Graham, the rain falls for 12.1 days. Throughout September, 1.77" (45mm) of precipitation is accumulated. In Graham, during the entire year, the rain falls for 172.9 days and collects up to 32.28" (820mm) of precipitation.

Snowfall

In Graham, snow does not fall in May through October.

Daylight

In September, the average length of the day is 12h and 32min.
On the first day of September, sunrise is at 6:28 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:51 pm PDT.

Sunshine

The average sunshine in September in Graham, Washington, is 9h.

UV index

In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 3 in September interpret into the following advice:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Graham?

In September, the average high-temperature is 69.8°F (21°C), and the average low-temperature is 48°F (8.9°C).

What is the average humidity in September in Graham?

In September, the average relative humidity in Graham is 75%.

How many days does it rain in September in Graham?

In Graham, in September, it is raining for 12.1 days, with typically 1.77" (45mm) of accumulated precipitation.

When it does not snow in Graham?

May through October are months without snowfall in Graham.

What is the average length of the day in September in Graham?

In September, the average day length is 12h and 32min.

When is the sunrise / sunset in September in Graham?

On the first day of September in Graham, Washington, sunrise is at 6:28 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:51 pm PDT.

How many hours of sunshine does Graham have in September?

In September, the average sunshine duration is 9h.

How high is the UV index in September in Graham?

The average daily maximum UV index in September in Graham, Washington, is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Graham, WA

Average temperature in September - Graham, WA
  • Average high temperature in September: 69.8°F

The warmest month (with the highest average high temperature) is August (77.2°F).
The month with the lowest average high temperature is December (42.8°F).

  • Average low temperature in September: 48°F

The month with the highest average low temperature is August (51.3°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).

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Average pressure in September
Graham, WA

Average pressure in September - Graham, WA
  • Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).

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Average wind speed in September
Graham, WA

Average wind speed in September - Graham, WA
  • Average wind speed in September: 3.9mph

The windiest months (with the highest average wind speed) are January and March (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

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Average humidity in September
Graham, WA

Average humidity in September - Graham, WA
  • Average humidity in September: 75%

The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is July (70%).

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Average rainfall in September
Graham, WA

Average rainfall in September - Graham, WA
  • Average rainfall in September: 1.77"

The wettest month (with the highest rainfall) is December (4.92").
The driest month (with the least rainfall) is July (0.43").

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Average rainfall days in September
Graham, WA

Average rainfall days in September - Graham, WA
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is March (20.2 days).
The month with the least rainy days is August (4.8 days).

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Average snowfall in September
Graham, WA

Average snowfall in September - Graham, WA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.44").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Graham, WA

Average snowfall days in September - Graham, WA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (4.1 days).
The 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
Graham, WA

Average daylight in September / Average sunshine in September - Graham, WA
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in September: 9h and 0min

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 6min).

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Average sunshine days in September
Graham, WA

Average sunshine days in September - Graham, WA
  • Average sunshine days in September: 16.2 days

The month with the most sunshine days is August (23.8 days).
The month with the least sunshine days is November (9.3 days).

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Average UV index in September
Graham, WA

Average UV index in September - Graham, WA
  • Average UV index in September: 3

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

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Average cloud cover in September
Graham, WA

Average cloud cover in September - Graham, WA
  • Average cloud cover in September: 37

The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in September
Graham, WA

Average visibility in September - Graham, WA
  • Average visibility in September: 5mi

The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January and February (4mi).

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