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 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
During the shift to September, a minor reduction in average high-temperature is observed, shifting from a torrid 95.4°F (35.2°C) in August to a hot 88.3°F (31.3°C). September witnesses an average low-temperature hovering around an enjoyable 67.3°F (19.6°C).Humidity
In September, the average relative humidity is 27%.Rainfall
In Apollo, during September, the rain falls for 1.9 days and regularly aggregates up to 0.08" (2mm) of precipitation. In Apollo, during the entire year, the rain falls for 36.5 days and collects up to 3.11" (79mm) of precipitation.Snowfall
In Apollo, California, snow does not fall in February through October and December.Daylight
In Apollo, California, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:20 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:32 pm PDT.
Sunshine
In September, the average sunshine 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 risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September in Apollo?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Apollo have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Apollo have in September?
What is the UV index intensity in September?
Average temperature in September
Apollo, CA
- Average high temperature in September: 88.3°F
The warmest month (with the highest average high temperature) is July (96.4°F).
The month with the lowest average high temperature is December (54.3°F).
- Average low temperature in September: 67.3°F
The month with the highest average low temperature is August (72.9°F).
The coldest month (with the lowest average low temperature) is December (38.7°F).
Average pressure in September
Apollo, CA
- Average pressure in September: 29.85"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).
Average wind speed in September
Apollo, CA
- Average wind speed in September: 8.6mph
The windiest month (with the highest average wind speed) is May (12.6mph).
The calmest month (with the lowest average wind speed) is January (6.3mph).
Average humidity in September
Apollo, CA
- Average humidity in September: 27%
The months with the highest relative humidity are January and December (48%).
The month with the lowest relative humidity is August (23%).
Average rainfall in September
Apollo, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is December (0.55").
The driest month (with the least rainfall) is June (0").
Average rainfall days in September
Apollo, CA
- Average rainfall days in September: 1.9 days
The month with the highest number of rainy days is December (5.6 days).
The month with the least rainy days is June (0.2 days).
Average snowfall in September
Apollo, CA
- Average snowfall in September: 0"
The month with the highest snowfall is November (0.39").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and December (0").
Average snowfall days in September
Apollo, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Apollo, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 10h and 4min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 7h and 6min).
Average sunshine days in September
Apollo, CA
- Average sunshine days in September: 27.5 days
The month with the most sunshine days is June (29.8 days).
The month with the least sunshine days is February (22.8 days).
Average UV index in September
Apollo, CA
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in September
Apollo, CA
- Average cloud cover in September: 5
The month with the most cloud cover is December (Cloud cover 19).
The months with the least cloud cover are June, August and September (Cloud cover 5).
Average visibility in September
Apollo, 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).
Apollo, California, USA
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