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 signals a slight drop in average high-temperature, sliding from August's warm 77.4°F (25.2°C) to an agreeable 70.9°F (21.6°C). Merrill experiences an average nighttime temperature of 52.3°F (11.3°C) in the month of September.Humidity
In Merrill, the average relative humidity in September is 79%.Rainfall
In September, the rain falls for 11.2 days. Throughout September, 1.46" (37mm) of precipitation is accumulated. In Merrill, during the entire year, the rain falls for 144.5 days and collects up to 22.13" (562mm) of precipitation.Snowfall
In Merrill, snow does not fall in May through September.Daylight
In Merrill, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 7:02 am and sunset at 8:12 pm. On the last day of September, sunrise is at 7:34 am and sunset at 7:19 pm EDT.
Sunshine
In Merrill, the average sunshine in September is 8h.UV index
In Merrill, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 3 in September translates into this advice:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Merrill?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Merrill have in September?
What is the UV index reading in September?
Average temperature in September
Merrill, MI
- Average high temperature in September: 70.9°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in September: 52.3°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in September
Merrill, MI
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Merrill, MI
- Average wind speed in September: 7.3mph
The windiest months (with the highest average wind speed) are February and April (9.8mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in September
Merrill, MI
- Average humidity in September: 79%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Merrill, MI
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is November (1.22").
Average rainfall days in September
Merrill, MI
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in September
Merrill, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.08").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Merrill, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Merrill, MI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in September
Merrill, MI
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is September (16.5 days).
The month with the least sunshine days is February (8.4 days).
Average UV index in September
Merrill, MI
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Merrill, MI
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Merrill, MI
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, October and November (6mi).
The months with the lowest visibility are January, February, September and December (5mi).
Merrill, Michigan, USA
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