September weather forecast
Palm Grove, CA

Share

Weather in September

The first month of the autumn, September, is still a warm month in Palm Grove, California, with an average temperature varying between 63.5°F (17.5°C) and 85.6°F (29.8°C).

Temperature

Palm Grove starts September with an average high-temperature of a moderately hot 85.6°F (29.8°C), hinting at a minimal fluctuation from August. Palm Grove, in September, experiences a marked contrast from daytime zeniths to a steady average low-temperature of 63.5°F (17.5°C).

Heat index

Throughout September, the heat index is computed to be a tropical 86°F (30°C). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.
Heat index determinations are made taking into account the shade and light air movements. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'real feel' or 'feels like', melds the effects of warmth and moisture to generate a feeling of heat. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.

Humidity

In Palm Grove, the average relative humidity in September is 45%.

Rainfall

In Palm Grove, in September, it is raining for 5 days, with typically 0.59" (15mm) of accumulated precipitation. Throughout the year, there are 64.8 rainfall days, and 8.7" (221mm) of precipitation is accumulated.

Snowfall

January, April through November are months without snowfall in Palm Grove, California.

Daylight

The average length of the day in September in Palm Grove, California, is 12h and 22min.
On the first day of the month, sunrise is at 6:20 am and sunset at 7:09 pm. On the last day of September, sunrise is at 6:38 am and sunset at 6:30 pm PDT.

Sunshine

In September, the average sunshine in Palm Grove is 10.4h.

UV index

In September, the average daily maximum UV index in Palm Grove is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 6 during September leads to these advisories:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
[Resources]

Frequently asked questions

How hot is September in Palm Grove?

The average high-temperature, in September, in Palm Grove, is 85.6°F (29.8°C), while the average low-temperature is 63.5°F (17.5°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, is computed to be 86°F (30°C).

What is the average humidity in September in Palm Grove?

In Palm Grove, the average relative humidity in September is 45%.

How many days does it rain in September in Palm Grove?

In Palm Grove, in September, during 5 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

When it does not snow in Palm Grove?

In Palm Grove, California, snow does not fall in January, April through November.

What is the average length of the day in September in Palm Grove?

The average day length in September in Palm Grove, California, is 12h and 22min.

When are sunrise and sunset in September in Palm Grove?

On the first day of September, sunrise is at 6:20 am and sunset at 7:09 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 6:30 pm PDT.

How long on average sun shines in September in Palm Grove?

The average sunshine duration in September in Palm Grove is 10.4h.

What is the UV index intensity in September in Palm Grove?

In Palm Grove, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high hazard to health 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
Palm Grove, CA

Average temperature in September - Palm Grove, CA
  • Average high temperature in September: 85.6°F

The warmest month (with the highest average high temperature) is August (90.3°F).
The month with the lowest average high temperature is December (59°F).

  • Average low temperature in September: 63.5°F

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is December (42.3°F).

[Resources]

Average pressure in September
Palm Grove, CA

Average pressure in September - Palm Grove, CA
  • Average pressure in September: 29.85"Hg

The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

[Resources]

Average wind speed in September
Palm Grove, CA

Average wind speed in September - Palm Grove, CA
  • Average wind speed in September: 5.2mph

The windiest months (with the highest average wind speed) are April and May (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

[Resources]

Average humidity in September
Palm Grove, CA

Average humidity in September - Palm Grove, CA
  • Average humidity in September: 45%

The months with the highest relative humidity are March and May (54%).
The month with the lowest relative humidity is August (43%).

[Resources]

Average rainfall in September
Palm Grove, CA

Average rainfall in September - Palm Grove, CA
  • Average rainfall in September: 0.59"

The wettest month (with the highest rainfall) is February (1.5").
The driest month (with the least rainfall) is June (0.08").

[Resources]

Average rainfall days in September
Palm Grove, CA

Average rainfall days in September - Palm Grove, CA
  • Average rainfall days in September: 5 days

The month with the highest number of rainy days is July (7.9 days).
The month with the least rainy days is June (1.5 days).

[Resources]

Average snowfall in September
Palm Grove, CA

Average snowfall in September - Palm Grove, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.55").
The months with the least snowfall are January, April, May, June, July, August, September, October and November (0").

[Resources]

Average snowfall days in September
Palm Grove, CA

Average snowfall days in September - Palm Grove, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are January, April, May, June, July, August, September, October and November (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Palm Grove, CA

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

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in September: 10h and 2min

The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).

[Resources]

Average sunshine days in September
Palm Grove, CA

Average sunshine days in September - Palm Grove, CA
  • Average sunshine days in September: 23.1 days

The month with the most sunshine days is June (27.8 days).
The month with the least sunshine days is July (19 days).

[Resources]

Average UV index in September
Palm Grove, CA

Average UV index in September - Palm Grove, CA
  • Average UV index in September: 6

The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are November and December (UV index 3).

[Resources]

Average cloud cover in September
Palm Grove, CA

Average cloud cover in September - Palm Grove, CA
  • Average cloud cover in September: 9

The month with the most cloud cover is December (Cloud cover 26).
The month with the least cloud cover is June (Cloud cover 6).

[Resources]

Average visibility in September
Palm Grove, CA

Average visibility in September - Palm Grove, CA
  • Average visibility in September: 6mi

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

[Resources]

Palm Grove, California, USA

Weather forecast for your location

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