Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Alhambra experiences an average high-temperature of a warm 84.4°F (29.1°C) with the onset of September, subtly varied from August's 86.7°F (30.4°C). In the month of September, the average low-temperature in Alhambra usually rests at a comfortable 63.7°F (17.6°C).Heat index
September's heat index is estimated at a hot 86°F (30°C). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.Data suggests that the heat index is set for environments in shade and with a light wind. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', takes into account both air temperature and humidity to illustrate what people actually feel. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Humidity
In September, the average relative humidity in Alhambra, California, is 51%.Rainfall
In Alhambra, in September, it is raining for 2.2 days, with typically 0.12" (3mm) of accumulated precipitation. In Alhambra, during the entire year, the rain falls for 49.2 days and collects up to 8.23" (209mm) of precipitation.Snowfall
January through November are months without snowfall.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:17 pm. On the last day of September, in Alhambra, sunrise is at 6:46 am and sunset at 6:37 pm PDT.
Sunshine
In September, the average sunshine is 10.8h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 6 transforms into these recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
How hot is September in Alhambra?
What is the average humidity in September in Alhambra?
How many days does it rain in September in Alhambra?
When it does not snow in Alhambra?
How many hours of daylight does Alhambra have in September?
When are sunrise and sunset in September in Alhambra?
How many hours of sunshine does Alhambra have in September?
What are the months with the highest UV index in Alhambra?
What is the UV index intensity in September in Alhambra?
Average temperature in September
Alhambra, CA
- Average high temperature in September: 84.4°F
The warmest month (with the highest average high temperature) is August (86.7°F).
The month with the lowest average high temperature is December (63.1°F).
- Average low temperature in September: 63.7°F
The month with the highest average low temperature is August (65.7°F).
The coldest months (with the lowest average low temperature) are February and December (47.8°F).
Average pressure in September
Alhambra, CA
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Alhambra, CA
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in September
Alhambra, CA
- Average humidity in September: 51%
The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (47%).
Average rainfall in September
Alhambra, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is February (1.77").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Alhambra, CA
- Average rainfall days in September: 2.2 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 days).
Average snowfall days in September
Alhambra, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Alhambra, 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 5min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).
Average sunshine days in September
Alhambra, CA
- Average sunshine days in September: 26.1 days
The month with the most sunshine days is August (28.3 days).
The month with the least sunshine days is February (21 days).
Average UV index in September
Alhambra, CA
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in September
Alhambra, CA
- Average cloud cover in September: 7
The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in September
Alhambra, 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).
Alhambra, California, USA
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