September weather forecast
Loma Linda, CA

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Weather in September

September, the first month of the autumn in Loma Linda, is still a hot month, with an average temperature ranging between min 63.3°F (17.4°C) and max 87.4°F (30.8°C).

Temperature

Loma Linda's shift from August to September is accompanied by an average high-temperature of a still hot 87.4°F (30.8°C), a slight deviation from 91.9°F (33.3°C). Significant dips from daytime highs mark the September nights, with a consistent average temperature of 63.3°F (17.4°C).

Heat index

September's average heat index is computed to be a tropical 87.8°F (31°C). Continuing activity during long-lasting exposure might induce tiredness and result in heat cramps.
Heat index's context suggests values are appropriate for shady areas and slight breezes. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.

Humidity

In September, the average relative humidity is 41%.

Rainfall

In Loma Linda, during September, the rain falls for 1.9 days and regularly aggregates up to 0.08" (2mm) of precipitation. In Loma Linda, during the entire year, the rain falls for 46.6 days and collects up to 6.18" (157mm) of precipitation.

Snowfall

In Loma Linda, snow does not fall in January, March through December.

Daylight

In September, the average length of the day is 12h and 22min.
On the first day of September, sunrise is at 6:23 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:34 pm PDT.

Sunshine

In Loma Linda, the average sunshine in September is 10.7h.

UV index

In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: During September, 6 as the daily maximum UV index converts into the following advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
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Frequently asked questions

How hot does it get in Loma Linda in September?

Loma Linda in September has an average high-temperature of 87.4°F (30.8°C) and an average low-temperature of 63.3°F (17.4°C). In September, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is computed to be 87.8°F (31°C).

What is the average humidity in September in Loma Linda?

The average relative humidity in September in Loma Linda, California, is 41%.

How many days does it rain in September in Loma Linda?

In Loma Linda, in September, it is raining for 1.9 days, with typically 0.08" (2mm) of accumulated precipitation.

When it does not snow in Loma Linda?

January, March through December are months without snowfall in Loma Linda, California.

What is the average length of the day in September in Loma Linda?

The average day length in September in Loma Linda, California, is 12h and 22min.

What time are sunrise and sunset in September in Loma Linda?

In September, on the first day of the month, sunrise is at 6:23 am and sunset at 7:14 pm. On the last day of the month, in Loma Linda, sunrise is at 6:43 am and sunset at 6:34 pm PDT.

How many hours of sunshine does Loma Linda have in September?

In Loma Linda, the average sunshine duration in September is 10.7h.

What is the UV index reading in September in Loma Linda?

The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Loma Linda, CA

Average temperature in September - Loma Linda, CA
  • Average high temperature in September: 87.4°F

The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is December (59.9°F).

  • Average low temperature in September: 63.3°F

The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (43.5°F).

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Average pressure in September
Loma Linda, CA

Average pressure in September - Loma Linda, CA
  • Average pressure in September: 29.87"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in September
Loma Linda, CA

Average wind speed in September - Loma Linda, CA
  • Average wind speed in September: 4.5mph

The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity in September
Loma Linda, CA

Average humidity in September - Loma Linda, CA
  • Average humidity in September: 41%

The month with the highest relative humidity is February (53%).
The month with the lowest relative humidity is August (38%).

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Average rainfall in September
Loma Linda, CA

Average rainfall in September - Loma Linda, CA
  • Average rainfall in September: 0.08"

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

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Average rainfall days in September
Loma Linda, CA

Average rainfall days in September - Loma Linda, CA
  • Average rainfall days in September: 1.9 days

The month with the highest number of rainy days is March (6.7 days).
The month with the least rainy days is June (1.2 days).

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Average snowfall days in September
Loma Linda, CA

Average snowfall days in September - Loma Linda, CA
  • Average snowfall days in September: 0 days

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

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Average daylight in September /
Average sunshine in September
Loma Linda, CA

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

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 10h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).

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Average sunshine days in September
Loma Linda, CA

Average sunshine days in September - Loma Linda, CA
  • Average sunshine days in September: 26.7 days

The months with the most sunshine days are June and October (27.9 days).
The month with the least sunshine days is February (21.7 days).

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Average UV index in September
Loma Linda, CA

Average UV index in September - Loma Linda, CA
  • Average UV index in September: 6

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in September
Loma Linda, CA

Average cloud cover in September - Loma Linda, CA
  • Average cloud cover in September: 6

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

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Average visibility in September
Loma Linda, CA

Average visibility in September - Loma Linda, 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).

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Loma Linda, California, USA

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