September weather forecastMerino, CO
September
Weather in September
The first month of the autumn, September, is still a warm month in Merino, Colorado, with an average temperature fluctuating between 56.3°F (13.5°C) and 78.8°F (26°C).Temperature
The start of September comes with a small reduction in the average high-temperature, subtly receding from a tropical 86.2°F (30.1°C) in August to a moderately hot 78.8°F (26°C). Contrasting the daytime warmth, Merino's September nights cool down to an average of 56.3°F (13.5°C).Humidity
The least humid month is September, with an average relative humidity of 47%.Rainfall
In September, the rain falls for 10.1 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. In Merino, during the entire year, the rain falls for 123.2 days and collects up to 15.39" (391mm) of precipitation.Snowfall
June through September are months without snowfall in Merino.Daylight
In Merino, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:21 am and sunset at 7:24 pm. On the last day of September, sunrise is at 6:49 am and sunset at 6:36 pm MDT.
Sunshine
In Merino, the average sunshine in September is 10.3h.UV index
In Merino, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. During bright days, sunglasses that offer UVA and UVB defense are recommended. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Merino, CO
- Average high temperature in September: 78.8°F
The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is December (37.8°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is December (23°F).
Average pressure in September
Merino, CO
- Average pressure in September: 29.94"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
Merino, CO
- Average wind speed in September: 9.5mph
The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is August (9mph).
Average humidity in September
Merino, CO
- Average humidity in September: 47%
The month with the highest relative humidity is January (65%).
The month with the lowest relative humidity is September (47%).
Average rainfall in September
Merino, CO
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in September
Merino, CO
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in September
Merino, CO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.68").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Merino, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (6.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Merino, CO
- Average daylight in September: 12h and 24min
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 18min).
- Average sunshine in September: 10h and 18min
The months with the most sunshine are June and August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 18min).
Average sunshine days in September
Merino, CO
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in September
Merino, CO
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Merino, CO
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Merino, CO
- 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).
