September weather forecastIrvings Crest, CA
September
Weather in September
September, the first month of the autumn in Irvings Crest, is still a warm month, with temperature in the range of an average low of 63°F (17.2°C) and an average high of 83.8°F (28.8°C).Temperature
Irvings Crest's entry into September measures an average high-temperature of a still warm 83.8°F (28.8°C), closely parallel to the preceding month. In September, Irvings Crest records an average nighttime temperature of 63°F (17.2°C).Heat index
For most parts of September, the heat index is estimated at a tropical 86°F (30°C). Fatigue might occur with continuous exposure and activity, potentially causing heat cramps.The metrics for the heat index are tailored for both shady environments and light winds. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an estimation of the warmth sensation when considering humidity levels. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Humidity
In September, the average relative humidity is 57%.Rainfall
In Irvings Crest, in September, it is raining for 4.7 days, with typically 0.43" (11mm) of accumulated precipitation. Throughout the year, in Irvings Crest, there are 60.3 rainfall days, and 8.43" (214mm) of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 22min.On the first day of September in Irvings Crest, sunrise is at 6:22 am and sunset at 7:12 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:33 pm PDT.
Sunshine
In Irvings Crest, the average sunshine in September is 10.4h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A daily maximum UV index of 6 in September translates into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Irvings Crest, CA
- Average high temperature in September: 83.8°F
The warmest month (with the highest average high temperature) is August (85.8°F).
The month with the lowest average high temperature is December (63.3°F).
- Average low temperature in September: 63°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is February (45.5°F).
Average pressure in September
Irvings Crest, CA
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Irvings Crest, CA
- Average wind speed in September: 4mph
The windiest months (with the highest average wind speed) are April and May (5.3mph).
The calmest month (with the lowest average wind speed) is September (4mph).
Average humidity in September
Irvings Crest, CA
- Average humidity in September: 57%
The month with the highest relative humidity is May (65%).
The month with the lowest relative humidity is November (52%).
Average rainfall in September
Irvings Crest, CA
- Average rainfall in September: 0.43"
The wettest month (with the highest rainfall) is February (1.5").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Irvings Crest, CA
- Average rainfall days in September: 4.7 days
The month with the highest number of rainy days is March (7.9 days).
The month with the least rainy days is June (1.8 days).
Average daylight in September /
Average sunshine in September
Irvings Crest, CA
- Average daylight in September: 12h and 24min
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 24min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Irvings Crest, CA
- Average sunshine days in September: 22 days
The month with the most sunshine days is June (27.4 days).
The month with the least sunshine days is July (19.9 days).
Average UV index in September
Irvings Crest, CA
- Average UV index in September: 6
The 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).
Average cloud cover in September
Irvings Crest, CA
- Average cloud cover in September: 9
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in September
Irvings Crest, 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).
