September weather forecast
Humboldt Hill, CA

Share

Weather in September

September, the first month of the autumn in Humboldt Hill, is still a pleasant month, with an average temperature ranging between max 68.9°F (20.5°C) and min 51.6°F (10.9°C).

Temperature

With the advent of September, Humboldt Hill experiences an average high-temperature of a still pleasant 68.9°F (20.5°C), mirroring a close resemblance to the previous month. Humboldt Hill experiences a nighttime temperature average of 51.6°F (10.9°C) during September.

Humidity

In Humboldt Hill, California, the average relative humidity in September is 76%.

Rainfall

In September, the rain falls for 4.5 days. Throughout September, 0.79" (20mm) of precipitation is accumulated. Throughout the year, in Humboldt Hill, there are 114.7 rainfall days, and 29.37" (746mm) of precipitation is accumulated.

Snowfall

January, March through December are months without snowfall.

Daylight

In Humboldt Hill, the average length of the day in September is 12h and 27min.
On the first day of September in Humboldt Hill, sunrise is at 6:44 am and sunset at 7:48 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 in Humboldt Hill is 10.3h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: An average maximum UV index of 4 in September leads to these recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Enhance your sun protection with tightly woven, yet airy clothing.
[Resources]

Frequently asked questions

What are the temperatures in Humboldt Hill in September?

The average high-temperature, in September, in Humboldt Hill, is 68.9°F (20.5°C), while the average low-temperature is 51.6°F (10.9°C).

What is the average humidity in September in Humboldt Hill?

In Humboldt Hill, California, the average relative humidity in September is 76%.

How much does it rain in Humboldt Hill in September?

In September, in Humboldt Hill, the rain falls for 4.5 days. Throughout September, 0.79" (20mm) of precipitation is accumulated.

When it does not snow in Humboldt Hill?

In Humboldt Hill, snow does not fall in January, March through December.

How many hours of daylight does Humboldt Hill have in September?

In Humboldt Hill, the average day length in September is 12h and 27min.

When are sunrise and sunset in September in Humboldt Hill?

In September, on the first day of the month, sunrise is at 6:44 am and sunset at 7:48 pm. On the last day of the month, in Humboldt Hill, sunrise is at 7:13 am and sunset at 6:59 pm PDT.

How many hours of sunshine does Humboldt Hill have in September?

In September, the average sunshine duration in Humboldt Hill, California, is 10.3h.

What is the UV index intensity in September in Humboldt Hill?

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health risk 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
Humboldt Hill, CA

Average temperature in September - Humboldt Hill, CA
  • Average high temperature in September: 68.9°F

The warmest month (with the highest average high temperature) is August (69.6°F).
The month with the lowest average high temperature is December (52.7°F).

  • Average low temperature in September: 51.6°F

The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is February (41.9°F).

[Resources]

Average pressure in September
Humboldt Hill, CA

Average pressure in September - Humboldt Hill, CA
  • Average pressure in September: 29.97"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).

[Resources]

Average wind speed in September
Humboldt Hill, CA

Average wind speed in September - Humboldt Hill, CA
  • Average wind speed in September: 6mph

The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

[Resources]

Average humidity in September
Humboldt Hill, CA

Average humidity in September - Humboldt Hill, CA
  • Average humidity in September: 76%

The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is October (75%).

[Resources]

Average rainfall in September
Humboldt Hill, CA

Average rainfall in September - Humboldt Hill, CA
  • Average rainfall in September: 0.79"

The wettest month (with the highest rainfall) is December (5.31").
The driest month (with the least rainfall) is July (0.12").

[Resources]

Average rainfall days in September
Humboldt Hill, CA

Average rainfall days in September - Humboldt Hill, CA
  • Average rainfall days in September: 4.5 days

The month with the highest number of rainy days is March (17.5 days).
The month with the least rainy days is August (2.1 days).

[Resources]

Average snowfall in September
Humboldt Hill, CA

Average snowfall in September - Humboldt Hill, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.39").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

[Resources]

Average snowfall days in September
Humboldt Hill, CA

Average snowfall days in September - Humboldt Hill, CA
  • 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).

[Resources]

Average daylight in September /
Average sunshine in September
Humboldt Hill, CA

Average daylight in September / Average sunshine in September - Humboldt Hill, CA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in September: 10h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

[Resources]

Average sunshine days in September
Humboldt Hill, CA

Average sunshine days in September - Humboldt Hill, CA
  • Average sunshine days in September: 24.9 days

The month with the most sunshine days is July (28.3 days).
The month with the least sunshine days is March (12.1 days).

[Resources]

Average UV index in September
Humboldt Hill, CA

Average UV index in September - Humboldt Hill, CA
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 3).

[Resources]

Average cloud cover in September
Humboldt Hill, CA

Average cloud cover in September - Humboldt Hill, CA
  • Average cloud cover in September: 18

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 16).

[Resources]

Average visibility in September
Humboldt Hill, CA

Average visibility in September - Humboldt Hill, CA
  • 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).

[Resources]

Humboldt Hill, California, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location