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 heralds a minor drop in average high-temperature, sliding from August's 81.9°F (27.7°C) to a still moderately hot 74.3°F (23.5°C). Throughout September nights, a significant departure from daytime temperatures, with an average low of 43.3°F (6.3°C), is recognized.Humidity
In September, the average relative humidity in Herlong is 45%.Rainfall
In Herlong, during September, the rain falls for 3.9 days and regularly aggregates up to 0.35" (9mm) of precipitation. Throughout the year, there are 64.7 rainfall days, and 20.51" (521mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall in Herlong. September is the first month it typically snows. Throughout September, in the average 0.6 snowfall days, it receives 1.06" (27mm) of snow. Throughout the year, in Herlong, there are 82.6 snowfall days, and 115.39" (2931mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September in Herlong, sunrise is at 6:28 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:43 pm PDT.
Sunshine
In Herlong, California, the average sunshine in September is 11.1h.UV index
In Herlong, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Herlong?
What is the average humidity in September in Herlong?
How much does it rain in Herlong in September?
When does it start to snow in Herlong?
How many hours of daylight does Herlong have in September?
When are sunrise and sunset in September in Herlong?
How many hours of sunshine does Herlong have in September?
What is the UV index intensity in September in Herlong?
Average temperature in September
Herlong, CA
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (36.7°F).
- Average low temperature in September: 43.3°F
The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).
Average pressure in September
Herlong, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Herlong, CA
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is March (6.6mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Herlong, CA
- Average humidity in September: 45%
The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (39%).
Average rainfall in September
Herlong, CA
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is March (3.62").
The driest months (with the least rainfall) are July and August (0.16").
Average rainfall days in September
Herlong, CA
- Average rainfall days in September: 3.9 days
The month with the highest number of rainy days is May (9.9 days).
The month with the least rainy days is July (2.5 days).
Average snowfall in September
Herlong, CA
- Average snowfall in September: 1.06"
The month with the highest snowfall is March (24.61").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Herlong, CA
- Average snowfall days in September: 0.6 days
The month with the highest number of snowfall days is March (15.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Herlong, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in September
Herlong, CA
- Average sunshine days in September: 25.3 days
The month with the most sunshine days is August (26.9 days).
The month with the least sunshine days is March (12.3 days).
Average UV index in September
Herlong, CA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
Herlong, CA
- Average cloud cover in September: 12
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in September
Herlong, CA
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Herlong, California, USA
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