September weather forecast and climate
Winterwarm, CA

Weather in September

September, the first month of the autumn, in Winterwarm, is also a moderately hot month, with temperature in the range of an average low of 61.9°F (16.6°C) and an average high of 81.7°F (27.6°C).

Temperature

In September, the average high-temperature is relatively the same as in August - a still moderately hot 81.7°F (27.6°C). In September, the average low-temperature is 61.9°F (16.6°C).

Heat index

In September, the average heat index is estimated at 84.2°F (29°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 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, differences in body mass, height, and shape, clothing, and metabolic differences affect individual temperature impact. 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. 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

The average relative humidity in Winterwarm, California, is 61%.

Rainfall

In Winterwarm, during 4.4 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. Throughout the year, there are 63.6 rainfall days, and 8.98" (228mm) of precipitation is accumulated.

Daylight

The average length of the day in Winterwarm is 12.4h.

Sunshine

In Winterwarm, the average sunshine is 10.5h.

UV index

Months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 6 in September transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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 Winterwarm?

The average high-temperature, in September, in Winterwarm, California, is 81.7°F (27.6°C), while the average low-temperature is 61.9°F (16.6°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), that calculates temperature value influenced by the moisture in the air, in September is estimated at 84.2°F (29°C).

What is the average humidity in September in Winterwarm?

In September, the average relative humidity in Winterwarm, California, is 61%.

How many days does it rain in September in Winterwarm?

In Winterwarm, during September, the rain falls for 4.4 days and regularly aggregates up to 0.31" (8mm) of precipitation.

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

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

How long on average sun shines in September in Winterwarm?

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

What is the month with the highest UV index in Winterwarm?

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

What is the UV index reading in September in Winterwarm?

In Winterwarm, California, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Winterwarm, CA

Average temperature in September - Winterwarm, CA
  • Average high temperature in September: 81.7°F

The warmest month (with the highest average high temperature) is August (83.3°F).
The month with the lowest average high temperature is December (63°F).

  • Average low temperature in September: 61.9°F

The month with the highest average low temperature is August (63°F).
The coldest months (with the lowest average low temperature) are February and December (46.9°F).

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Average pressure in September
Winterwarm, CA

Average pressure in September - Winterwarm, CA
  • Average pressure in September: 29.88"

The month with the highest atmospheric pressure is January (30.09").
The month with the lowest atmospheric pressure is June (29.87").

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Average wind speed in September
Winterwarm, CA

Average wind speed in September - Winterwarm, CA
  • Average wind speed in September: 4.4mph

The windiest months (with the highest average wind speed) are April and May (5.5mph).
The calmest month (with the lowest average wind speed) is October (4.3mph).

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Average humidity in September
Winterwarm, CA

Average humidity in September - Winterwarm, CA
  • Average humidity in September: 61%

The month with the highest relative humidity is May (69%).
The month with the lowest relative humidity is November (55%).

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Average rainfall in September
Winterwarm, CA

Average rainfall in September - Winterwarm, CA
  • Average rainfall in September: 0.31"

The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in September
Winterwarm, CA

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

The month with the highest number of rainy days is March (8.3 days).
The month with the least rainy days is June (1.2 days).

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

Average daylight in September / Average sunshine in September - Winterwarm, 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

Months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.6h).

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Average sunshine days in September
Winterwarm, CA

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

The month with the most sunshine days is June (25.8 days).
The month with the least sunshine days is February (20 days).

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Average UV index in September
Winterwarm, CA

Average UV index in September - Winterwarm, 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
Winterwarm, CA

Average cloud cover in September - Winterwarm, CA
  • Average cloud cover in September: 10

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

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Average visibility in September
Winterwarm, CA

Average visibility in September - Winterwarm, 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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