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
As August turns into September, the average high-temperatures rest at a still hot 86.9°F (30.5°C), showing a minor variation from the prior month. During September, Mammoth observes a consistent average nighttime temperature of 68.4°F (20.2°C).Heat index
The heat index for September is evaluated at a hot 86°F (30°C). With ongoing exposure and activity, one might experience weariness, and heat cramps could ensue.Bear in mind that the heat index values are determined for shaded areas and light breezes. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', arises from combining readings of air temperature and relative moisture content. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Humidity
The average relative humidity in September is 41%.Rainfall
In Mammoth, during September, the rain falls for 10.2 days and regularly aggregates up to 1.46" (37mm) of precipitation. In Mammoth, during the entire year, the rain falls for 80.2 days and collects up to 10.16" (258mm) of precipitation.Snowfall
In Mammoth, snow does not fall in March through December.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 5:57 am and sunset at 6:46 pm. On the last day of September, in Mammoth, Arizona, sunrise is at 6:16 am and sunset at 6:08 pm MST.
Sunshine
In September, the average sunshine in Mammoth is 9.9h.UV index
In September, the average daily maximum UV index in Mammoth is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 6 in September translates into this advice:
Take precautions against overexposure. Protection against sun damage is needed. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Mammoth in September?
What is the average humidity in September in Mammoth?
How much does it rain in Mammoth in September?
When it does not snow in Mammoth?
What is the average length of the day in September in Mammoth?
When is the sunrise / sunset in September in Mammoth?
How long on average sun shines in September in Mammoth?
How high is the UV index in September in Mammoth?
Average temperature in September
Mammoth, AZ
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is June (93.9°F).
The month with the lowest average high temperature is December (58.1°F).
- Average low temperature in September: 68.4°F
The month with the highest average low temperature is July (74.8°F).
The coldest month (with the lowest average low temperature) is January (39.7°F).
Average pressure in September
Mammoth, AZ
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Mammoth, AZ
- Average wind speed in September: 5.5mph
The windiest months (with the highest average wind speed) are April and May (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Mammoth, AZ
- Average humidity in September: 41%
The month with the highest relative humidity is December (50%).
The month with the lowest relative humidity is June (20%).
Average rainfall in September
Mammoth, AZ
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is July (1.97").
The driest months (with the least rainfall) are May and June (0.12").
Average rainfall days in September
Mammoth, AZ
- Average rainfall days in September: 10.2 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is May (2 days).
Average snowfall in September
Mammoth, AZ
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.04").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Mammoth, AZ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Mammoth, AZ
- Average daylight in September: 12h and 2min
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: 9h and 5min
The month with the most sunshine is August (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in September
Mammoth, AZ
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is May (28.7 days).
The month with the least sunshine days is July (10 days).
Average UV index in September
Mammoth, AZ
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in September
Mammoth, AZ
- Average cloud cover in September: 13
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 7).
Average visibility in September
Mammoth, AZ
- 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).
Mammoth, Arizona, USA
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