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's arrival comes with a mild decrease in the average high-temperature, moving subtly from a tropical 86.5°F (30.3°C) in August to a warm 80.6°F (27°C). During September, Monticello records an average temperature of 62.1°F (16.7°C) at night.Heat index
In September, the heat index is evaluated at 80.6°F (27°C). Enduring exposure and unrelenting activity might cause a state of weariness, potentially leading to heat cramps.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is the result of factoring in humidity to the air temperature, indicating perceived warmth. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Humidity
The average relative humidity in September is 44%.Rainfall
In Monticello, in September, it is raining for 11.8 days, with typically 1.3" (33mm) of accumulated precipitation. In Monticello, during the entire year, the rain falls for 82.9 days and collects up to 8.54" (217mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Monticello, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:44 am and sunset at 7:34 pm. On the last day of September, in Monticello, sunrise is at 7:03 am and sunset at 6:55 pm MDT.
Sunshine
In Monticello, the average sunshine in September is 11.1h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 6 in September translates into this advice:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. 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. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Monticello have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Monticello have in September?
What is the UV index reading in September?
Average temperature in September
Monticello, NM
- Average high temperature in September: 80.6°F
The warmest month (with the highest average high temperature) is June (90°F).
The month with the lowest average high temperature is December (51.1°F).
- Average low temperature in September: 62.1°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (32.9°F).
Average pressure in September
Monticello, NM
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Monticello, NM
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Monticello, NM
- Average humidity in September: 44%
The month with the highest relative humidity is December (50%).
The months with the lowest relative humidity are April and May (23%).
Average rainfall in September
Monticello, NM
- Average rainfall in September: 1.3"
The wettest month (with the highest rainfall) is July (2.13").
The driest month (with the least rainfall) is April (0.12").
Average rainfall days in September
Monticello, NM
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is November (2.7 days).
Average snowfall in September
Monticello, NM
- Average snowfall in September: 0"
The month with the highest snowfall is November (1.46").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Monticello, NM
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (1.4 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
Monticello, NM
- 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: 11h and 1min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 7h and 12min).
Average sunshine days in September
Monticello, NM
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is November (26.5 days).
The month with the least sunshine days is July (7.7 days).
Average UV index in September
Monticello, NM
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Monticello, NM
- Average cloud cover in September: 14
The month with the most cloud cover is July (Cloud cover 19).
The month with the least cloud cover is May (Cloud cover 9).
Average visibility in September
Monticello, NM
- 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).
Monticello, New Mexico, USA
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