September weather forecast
Humptulips, WA

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Weather in September

The first month of the autumn, September, is still a comfortable month in Humptulips, Washington, with temperature in the range of an average low of 52.7°F (11.5°C) and an average high of 63.7°F (17.6°C).

Temperature

As Humptulips steps into September, the average high-temperature is measured at a still comfortable 63.7°F (17.6°C), displaying minor differences from August's 65.8°F (18.8°C). In September, Humptulips experiences an average nighttime temperature of 52.7°F (11.5°C).

Humidity

In September, the average relative humidity is 83%.

Rainfall

In Humptulips, Washington, during September, the rain falls for 10.6 days and regularly aggregates up to 1.02" (26mm) of precipitation. Throughout the year, in Humptulips, there are 152.8 rainfall days, and 19.41" (493mm) of precipitation is accumulated.

Snowfall

In Humptulips, snow does not fall in April through October and December.

Daylight

In Humptulips, the average length of the day in September is 12h and 32min.
On the first day of September, sunrise is at 6:36 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 6:56 pm PDT.

Sunshine

In September, the average sunshine is 8.4h.

UV index

May through September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, a daily UV index of 4 turns into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. To protect against the Sun's most potent rays, avoid direct exposure around midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature in Humptulips?

The high-temperature during September is 63.7°F (17.6°C) and the low-temperature is 52.7°F (11.5°C).

What is the average humidity in September?

In Humptulips, the average relative humidity in September is 83%.

How much does it rain in Humptulips in September?

In Humptulips, in September, during 10.6 rainfall days, 1.02" (26mm) of precipitation is typically accumulated.

When it does not snow?

In Humptulips, snow does not fall in April through October and December.

How many hours of daylight does Humptulips have in September?

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

When is the sunrise / sunset in September in Humptulips?

In September, on the first day of the month, sunrise is at 6:36 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 6:56 pm PDT.

How long on average sun shines in September?

In Humptulips, the average sunshine duration in September is 8.4h.

What are the months with the highest UV index?

The months with the highest UV index are May through September, with an average maximum UV index of 4.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe 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
Humptulips, WA

Average temperature in September - Humptulips, WA
  • Average high temperature in September: 63.7°F

The warmest month (with the highest average high temperature) is August (65.8°F).
The month with the lowest average high temperature is December (45.5°F).

  • Average low temperature in September: 52.7°F

The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is December (39.7°F).

Average pressure in September
Humptulips, WA

Average pressure in September - Humptulips, WA
  • Average pressure in September: 30.02"Hg

The month with the highest atmospheric pressure is July (30.08"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).

Average wind speed in September
Humptulips, WA

Average wind speed in September - Humptulips, WA
  • Average wind speed in September: 7.1mph

The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is September (7.1mph).

Average humidity in September
Humptulips, WA

Average humidity in September - Humptulips, WA
  • Average humidity in September: 83%

The month with the highest relative humidity is December (85%).
The months with the lowest relative humidity are April, May and June (81%).

Average rainfall in September
Humptulips, WA

Average rainfall in September - Humptulips, WA
  • Average rainfall in September: 1.02"

The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is July (0.24").

Average rainfall days in September
Humptulips, WA

Average rainfall days in September - Humptulips, WA
  • Average rainfall days in September: 10.6 days

The month with the highest number of rainy days is December (18.5 days).
The month with the least rainy days is July (5.6 days).

Average snowfall in September
Humptulips, WA

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

The month with the highest snowfall is February (1.02").
The months with the least snowfall are April, May, June, July, August, September, October and December (0").

Average snowfall days in September
Humptulips, WA

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

The month with the highest number of snowfall days is February (1.6 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Humptulips, WA

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

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

Average sunshine days in September
Humptulips, WA

Average sunshine days in September - Humptulips, WA
  • Average sunshine days in September: 17.3 days

The month with the most sunshine days is July (23.8 days).
The month with the least sunshine days is December (10.7 days).

Average UV index in September
Humptulips, WA

Average UV index in September - Humptulips, WA
  • Average UV index in September: 4

The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September
Humptulips, WA

Average cloud cover in September - Humptulips, WA
  • Average cloud cover in September: 39

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in September
Humptulips, WA

Average visibility in September - Humptulips, WA
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).

Humptulips, Washington, USA

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