September weather forecast and climate
Highland, CA

Weather in September

September, the first month of the autumn, in Highland, is also a moderately hot month, with average temperature ranging between max 85.8°F (29.9°C) and min 62.4°F (16.9°C).

Temperature

In September, the average high-temperature is relatively the same as in August - a warm 85.8°F (29.9°C). In Highland, the average low-temperature is 62.4°F (16.9°C).

Humidity

The average relative humidity in Highland is 39%.

Rainfall

In September, in Highland, the rain falls for 2.6 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. Throughout the year, in Highland, there are 51.8 rainfall days, and 6.69" (170mm) of precipitation is accumulated.

Snowfall

In Highland, California, snow does not fall in January, March through December.

Daylight

The average length of the day in Highland, California, is 12.4h.

Sunshine

The average sunshine in Highland is 10.7h.

UV index

The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for 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.
[Resources]

FAQ

What is the temperature in September in Highland?

In Highland, in September, the average high-temperature is 85.8°F (29.9°C), and the average low-temperature is 62.4°F (16.9°C).

What is the average humidity in September in Highland?

The average relative humidity in September in Highland, California, is 39%.

How much does it rain in Highland in September?

In Highland, California, in September, it is raining for 2.6 days, with typically 0.12" (3mm) of accumulated precipitation.

When it does not snow in Highland?

January, March through December are months without snowfall in Highland.

How many hours of daylight does Highland have in September?

The average length of the day in September in Highland, California, is 12.4h.

How many hours of sunshine does Highland have in September?

In September, the average sunshine in Highland, California, is 10.7h.

What is the UV index intensity in September in Highland?

In September, the average daily maximum UV index in Highland is 6. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV radiation.

Average temperature in September
Highland, CA

Average temperature in September - Highland, CA
  • Average high temperature in September: 85.8°F

The warmest month (with the highest average high temperature) is August (90.9°F).
The month with the lowest average high temperature is December (57.7°F).

  • Average low temperature in September: 62.4°F

The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (41.5°F).

[Resources]

Average pressure in September
Highland, CA

Average pressure in September - Highland, CA
  • Average pressure in September: 29.86"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.84").

[Resources]

Average wind speed in September
Highland, CA

Average wind speed in September - Highland, CA
  • Average wind speed in September: 4.8mph

The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is September (4.8mph).

[Resources]

Average humidity in September
Highland, CA

Average humidity in September - Highland, CA
  • Average humidity in September: 39%

The month with the highest relative humidity is February (52%).
The month with the lowest relative humidity is August (36%).

[Resources]

Average rainfall in September
Highland, CA

Average rainfall in September - Highland, CA
  • Average rainfall in September: 0.12"

The wettest month (with the highest rainfall) is December (1.42").
The driest month (with the least rainfall) is June (0.04").

[Resources]

Average rainfall days in September
Highland, CA

Average rainfall days in September - Highland, CA
  • Average rainfall days in September: 2.6 days

The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is June (1.3 days).

[Resources]

Average snowfall days in September
Highland, CA

Average snowfall days in September - Highland, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.1 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Highland, CA

Average daylight in September / Average sunshine in September - Highland, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 10.7h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6.9h).

[Resources]

Average sunshine days in September
Highland, CA

Average sunshine days in September - Highland, CA
  • Average sunshine days in September: 25.7 days

The month with the most sunshine days is June (28.5 days).
The month with the least sunshine days is February (20.9 days).

[Resources]

Average UV index in September
Highland, CA

Average UV index in September - Highland, CA
  • Average UV index in September: 6

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are November and December (UV index 3).

[Resources]

Average cloud cover in September
Highland, CA

Average cloud cover in September - Highland, CA
  • Average cloud cover in September: 6

Months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

[Resources]

Average visibility in September
Highland, CA

Average visibility in September - Highland, CA
  • 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).

[Resources]