September weather forecast and climate
Moreno Valley, CA

Marina on Lake Perris State Park in Moreno Valley, California, with visible piers, luxury boats, and high hills
Marina on Lake Perris State Park in Moreno Valley, California, with visible piers, luxury boats, and high hills

Weather in September

September, the first month of the autumn, in Moreno Valley, is still a tropical month, with average temperature varying between 86.4°F (30.2°C) and 62.6°F (17°C).

Temperature

In September, the average high-temperature is practically the same as in August - a still hot 86.4°F (30.2°C). The average low-temperature, in Moreno Valley, is 62.6°F (17°C).

Heat index

The average heat index is evaluated at a hot 87.1°F (30.6°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, wind, differences in body mass, height, and shape), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In September, the average relative humidity is 45%.

Rainfall

In Moreno Valley, during September, the rain falls for 2.6 days and regularly aggregates up to 0.12" (3mm) of precipitation. Throughout the year, in Moreno Valley, there are 52.6 rainfall days, and 7.52" (191mm) of precipitation is accumulated.

Snowfall

January, March through December are months without snowfall.

Daylight

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

Sunshine

In Moreno Valley, the average sunshine in September is 10.6h.

UV index

In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Moreno Valley?

In Moreno Valley, California, in September, the average high-temperature is 86.4°F (30.2°C), and the average low-temperature is 62.6°F (17°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that combines air temperature and relative humidity, in September is evaluated at 87.1°F (30.6°C).

What is the average humidity in September in Moreno Valley?

The average relative humidity in September in Moreno Valley, California, is 45%.

How much does it rain in Moreno Valley in September?

In Moreno Valley, California, in September, during 2.6 rainfall days, 0.12" (3mm) of precipitation is typically accumulated.

When it does not snow in Moreno Valley?

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

How many hours of daylight does Moreno Valley have in September?

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

How many hours of sunshine does Moreno Valley have in September?

In Moreno Valley, California, the average sunshine in September is 10.6h.

How high is the UV index in September in Moreno Valley?

In September, the average daily maximum UV index in Moreno Valley, California, is 6. A UV Index of 6 to 7 symbolizes a high health threat from unsafe exposure to the Sun's UV rays.

Average temperature in September
Moreno Valley, CA

Average temperature in September - Moreno Valley, CA
  • Average high temperature in September: 86.4°F

The warmest month (with the highest average high temperature) is August (90.7°F).
The month with the lowest average high temperature is December (60.8°F).

  • Average low temperature in September: 62.6°F

The month with the highest average low temperature is August (64.8°F).
The coldest months (with the lowest average low temperature) are February and December (43.5°F).

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Average pressure in September
Moreno Valley, CA

Average pressure in September - Moreno Valley, CA
  • Average pressure in September: 29.87"

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

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Average wind speed in September
Moreno Valley, CA

Average wind speed in September - Moreno Valley, CA
  • Average wind speed in September: 4.3mph

The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).

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Average humidity in September
Moreno Valley, CA

Average humidity in September - Moreno Valley, CA
  • Average humidity in September: 45%

Months with the highest relative humidity are February and May (56%).
The month with the lowest relative humidity is August (42%).

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Average rainfall in September
Moreno Valley, CA

Average rainfall in September - Moreno Valley, CA
  • Average rainfall in September: 0.12"

The wettest month (with the highest rainfall) is February (1.61").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in September
Moreno Valley, CA

Average rainfall days in September - Moreno Valley, CA
  • Average rainfall days in September: 2.6 days

The month with the highest number of rainy days is March (7.7 days).
The month with the least rainy days is June (1.3 days).

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Average snowfall in September
Moreno Valley, CA

Average snowfall in September - Moreno Valley, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.04").
Months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in September
Moreno Valley, CA

Average snowfall days in September - Moreno Valley, 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).

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Average daylight in September /
Average sunshine in September
Moreno Valley, CA

Average daylight in September / Average sunshine in September - Moreno Valley, 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: 10.6h

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

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Average sunshine days in September
Moreno Valley, CA

Average sunshine days in September - Moreno Valley, CA
  • Average sunshine days in September: 25.1 days

The month with the most sunshine days is June (27.8 days).
The month with the least sunshine days is February (20.3 days).

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Average UV index in September
Moreno Valley, CA

Average UV index in September - Moreno Valley, 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).

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Average cloud cover in September
Moreno Valley, CA

Average cloud cover in September - Moreno Valley, CA
  • Average cloud cover in September: 7

The month with the most cloud cover is March (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in September
Moreno Valley, CA

Average visibility in September - Moreno Valley, 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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