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
September signifies a gentle decline in Helendale's average high-temperature, easing from a hot 91.9°F (33.3°C) in August to a moderately hot 85.8°F (29.9°C). September nights in Helendale indicate a noticeable temperature drop from the daytime highs, with an average reading lowering to a refreshing 63.5°F (17.5°C).Humidity
In Helendale, the average relative humidity in September is 32%.Rainfall
In Helendale, during September, the rain falls for 2.7 days and regularly aggregates up to 0.28" (7mm) of precipitation. In Helendale, during the entire year, the rain falls for 44.8 days and collects up to 4.8" (122mm) of precipitation.Snowfall
In Helendale, snow does not fall in March, May through October.Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:22 am and sunset at 7:15 pm. On the last day of September, sunrise is at 6:43 am and sunset at 6:34 pm PDT.
Sunshine
In Helendale, the average sunshine in September is 10.7h.UV index
The average daily maximum UV index in September in Helendale is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index, 6 during September, leads to the following recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Frequently asked questions
How hot is September in Helendale?
What is the average humidity in September in Helendale?
How many days does it rain in September in Helendale?
When it does not snow in Helendale?
How many hours of daylight does Helendale have in September?
What time are sunrise and sunset in September in Helendale?
How many hours of sunshine does Helendale have in September?
How high is the UV index in September in Helendale?
Average temperature in September
Helendale, CA
- Average high temperature in September: 85.8°F
The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is December (53.2°F).
- Average low temperature in September: 63.5°F
The month with the highest average low temperature is August (68.5°F).
The coldest month (with the lowest average low temperature) is December (38.3°F).
Average pressure in September
Helendale, CA
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Helendale, CA
- Average wind speed in September: 7.2mph
The windiest month (with the highest average wind speed) is May (10.3mph).
The calmest month (with the lowest average wind speed) is January (6.3mph).
Average humidity in September
Helendale, CA
- Average humidity in September: 32%
The month with the highest relative humidity is December (52%).
The month with the lowest relative humidity is August (27%).
Average rainfall in September
Helendale, CA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is December (0.98").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Helendale, CA
- Average rainfall days in September: 2.7 days
The month with the highest number of rainy days is March (6 days).
The month with the least rainy days is June (0.9 days).
Average snowfall in September
Helendale, CA
- Average snowfall in September: 0"
The month with the highest snowfall is November (1.73").
The months with the least snowfall are March, May, June, July, August, September and October (0").
Average snowfall days in September
Helendale, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Helendale, 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 54min).
- Average sunshine in September: 10h and 4min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 7h and 0min).
Average sunshine days in September
Helendale, CA
- Average sunshine days in September: 25.9 days
The month with the most sunshine days is June (28.9 days).
The month with the least sunshine days is February (22.4 days).
Average UV index in September
Helendale, CA
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Helendale, CA
- Average cloud cover in September: 6
The month with the most cloud cover is December (Cloud cover 21).
The months with the least cloud cover are June and August (Cloud cover 5).
Average visibility in September
Helendale, 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).
Helendale, California, USA
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