September weather forecast and climate
Ramona, CA

Weather in September

The first month of the autumn, September, is still a warm month in Ramona, California, with temperature in the range of an average high of 84.7°F (29.3°C) and an average low of 62.1°F (16.7°C).

Temperature

In Ramona, the average high-temperature is relatively the same as in August - a moderately hot 84.7°F (29.3°C). The average low-temperature, in September, is 62.1°F (16.7°C).

Heat index

The average heat index is computed to be a hot 87.6°F (30.9°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like wind, differences in body mass, height, and shape, pregnancy, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Ramona, the average relative humidity is 56%.

Rainfall

In Ramona, during September, the rain falls for 4.4 days and regularly aggregates up to 0.39" (10mm) of precipitation. In Ramona, during the entire year, the rain falls for 54.6 days and collects up to 6.06" (154mm) of precipitation.

Daylight

In September, the average length of the day is 12.4h.

Sunshine

The average sunshine in Ramona, California, is 10.5h.

UV index

June through September, with an average maximum UV index of 6, are months with the highest UV index in Ramona. A UV Index value of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.
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FAQ

What is the temperature in September in Ramona?

In September, the average high-temperature is 84.7°F (29.3°C), and the average low-temperature is 62.1°F (16.7°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines relative humidity and air temperature, in September is computed to be 87.6°F (30.9°C).

What is the average humidity in September in Ramona?

In September, the average relative humidity in Ramona, California, is 56%.

How many days does it rain in September in Ramona?

In September, in Ramona, California, the rain falls for 4.4 days. Throughout September, 0.39" (10mm) of precipitation is accumulated.

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

In September, the average length of the day in Ramona, California, is 12.4h.

How long on average sun shines in September in Ramona?

In September, the average sunshine in Ramona is 10.5h.

What are the months with the highest UV index in Ramona?

June through September, with an average maximum UV index of 6, are months with the highest UV index in Ramona.

What is the UV index reading in September in Ramona?

In Ramona, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to the UV radiation.

Average temperature in September
Ramona, CA

Average temperature in September - Ramona, CA
  • Average high temperature in September: 84.7°F

The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is December (62.8°F).

  • Average low temperature in September: 62.1°F

The month with the highest average low temperature is August (63.7°F).
The coldest months (with the lowest average low temperature) are February and December (44.6°F).

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Average pressure in September
Ramona, CA

Average pressure in September - Ramona, CA
  • Average pressure in September: 29.87"

The month with the highest atmospheric pressure is January (30.09").
The month with the lowest atmospheric pressure is June (29.86").

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Average wind speed in September
Ramona, CA

Average wind speed in September - Ramona, CA
  • Average wind speed in September: 4mph

The windiest month (with the highest average wind speed) is April (5.3mph).
The calmest months (with the lowest average wind speed) are August and September (4mph).

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Average humidity in September
Ramona, CA

Average humidity in September - Ramona, CA
  • Average humidity in September: 56%

The month with the highest relative humidity is May (65%).
The month with the lowest relative humidity is November (52%).

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Average rainfall in September
Ramona, CA

Average rainfall in September - Ramona, CA
  • Average rainfall in September: 0.39"

The wettest month (with the highest rainfall) is February (1.02").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in September
Ramona, CA

Average rainfall days in September - Ramona, CA
  • Average rainfall days in September: 4.4 days

The month with the highest number of rainy days is March (7.4 days).
The month with the least rainy days is June (1.5 days).

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

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

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 10.5h

The month with the most sunshine is July (Average sunshine: 12.1h).
Months with the least sunshine are January, February and December (Average sunshine: 6.8).

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Average sunshine days in September
Ramona, CA

Average sunshine days in September - Ramona, CA
  • Average sunshine days in September: 22.5 days

The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is July (20.7 days).

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Average UV index in September
Ramona, CA

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

Months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in September
Ramona, CA

Average cloud cover in September - Ramona, CA
  • Average cloud cover in September: 9

The month with the most cloud cover is March (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in September
Ramona, CA

Average visibility in September - Ramona, 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).

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