September weather forecastSaint Vrain, NM
September
Weather in September
September, the first month of the autumn in Saint Vrain, is also a moderately hot month, with an average temperature fluctuating between 61.2°F (16.2°C) and 81.7°F (27.6°C).Temperature
The shift from August to September coincides with a small decrease in the average high-temperature, down to a warm 81.7°F (27.6°C) from a hot 90.1°F (32.3°C). In September, Saint Vrain records an average nighttime temperature of 61.2°F (16.2°C).Heat index
The heat index value during September is evaluated at 82.4°F (28°C). If one continues to be active during exposure, it might cause tiredness and subsequent heat cramps.Understanding the heat index involves considering values for shaded locales with light wind. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Humidity
The average relative humidity in September is 53%.Rainfall
In Saint Vrain, in September, during 12.1 rainfall days, 1.73" (44mm) of precipitation is typically accumulated. Throughout the year, in Saint Vrain, there are 86.6 rainfall days, and 11.77" (299mm) of precipitation is accumulated.Snowfall
In Saint Vrain, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September, sunrise is at 6:27 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:38 pm MDT.
Sunshine
In Saint Vrain, the average sunshine in September is 10.2h.UV index
In Saint Vrain, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 5 during September translates into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint Vrain, NM
- Average high temperature in September: 81.7°F
The warmest month (with the highest average high temperature) is June (90.7°F).
The month with the lowest average high temperature is December (50°F).
- Average low temperature in September: 61.2°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is December (31.1°F).
Average pressure in September
Saint Vrain, NM
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Saint Vrain, NM
- Average wind speed in September: 10.6mph
The windiest month (with the highest average wind speed) is April (13.3mph).
The calmest month (with the lowest average wind speed) is August (9.9mph).
Average humidity in September
Saint Vrain, NM
- Average humidity in September: 53%
The month with the highest relative humidity is December (54%).
The month with the lowest relative humidity is April (34%).
Average rainfall in September
Saint Vrain, NM
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is October (1.81").
The driest month (with the least rainfall) is November (0.28").
Average rainfall days in September
Saint Vrain, NM
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is July (12.9 days).
The month with the least rainy days is November (2.6 days).
Average snowfall in September
Saint Vrain, NM
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (1.34").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Saint Vrain, NM
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (3.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Saint Vrain, NM
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 10h and 12min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The months with the least sunshine are January, February and December (Average sunshine: 7h and 0min).
Average sunshine days in September
Saint Vrain, NM
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is January (26.4 days).
The month with the least sunshine days is August (14 days).
Average UV index in September
Saint Vrain, NM
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Saint Vrain, NM
- Average cloud cover in September: 19
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 13).
Average visibility in September
Saint Vrain, 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).
